1 | /* img.c |
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2 | * Routines for reading and writing Survex ".3d" image files |
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3 | * Copyright (C) 1993-2002 Olly Betts |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or modify |
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6 | * it under the terms of the GNU General Public License as published by |
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7 | * the Free Software Foundation; either version 2 of the License, or |
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8 | * (at your option) any later version. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU General Public License |
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16 | * along with this program; if not, write to the Free Software |
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17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 | */ |
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19 | |
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20 | #ifdef HAVE_CONFIG_H |
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21 | # include <config.h> |
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22 | #endif |
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23 | |
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24 | #include <stdio.h> |
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25 | #include <string.h> |
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26 | #include <stdlib.h> |
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27 | #include <time.h> |
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28 | #include <ctype.h> |
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29 | |
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30 | #include "img.h" |
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31 | |
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32 | #ifdef IMG_HOSTED |
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33 | # include "debug.h" |
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34 | # include "filelist.h" |
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35 | # include "filename.h" |
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36 | # include "message.h" |
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37 | # include "useful.h" |
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38 | # define TIMENA msg(/*Date and time not available.*/108) |
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39 | # define TIMEFMT msg(/*%a,%Y.%m.%d %H:%M:%S %Z*/107) |
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40 | #else |
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41 | # define INT32_T long |
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42 | # define TIMENA "Time not available." |
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43 | # define TIMEFMT "%a,%Y.%m.%d %H:%M:%S %Z" |
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44 | # define EXT_SVX_3D "3d" |
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45 | # define xosmalloc(L) malloc((L)) |
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46 | # define xosrealloc(L,S) realloc((L),(S)) |
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47 | # define osfree(P) free((P)) |
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48 | # define ossizeof(T) sizeof(T) |
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49 | /* in IMG_HOSTED mode, this tests if a filename refers to a directory */ |
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50 | # define fDirectory(X) 0 |
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51 | /* open file FNM with mode MODE, maybe using path PTH and/or extension EXT */ |
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52 | /* path isn't used in img.c, but EXT is */ |
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53 | # define fopenWithPthAndExt(PTH,FNM,EXT,MODE,X) fopen(FNM,MODE) |
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54 | # define fFalse 0 |
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55 | # define fTrue 1 |
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56 | # define bool int |
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57 | /* dummy do {...} while(0) hack to permit stuff like |
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58 | * if (s) fputsnl(s,fh); else exit(1); |
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59 | * to work as intended |
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60 | */ |
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61 | # define fputsnl(S, FH) do {fputs((S), (FH)); putc('\n', (FH));} while(0) |
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62 | # define SVX_ASSERT(X) |
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63 | |
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64 | static long |
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65 | get32(FILE *fh) |
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66 | { |
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67 | long w = getc(fh); |
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68 | w |= (long)getc(fh) << 8l; |
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69 | w |= (long)getc(fh) << 16l; |
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70 | w |= (long)getc(fh) << 24l; |
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71 | return w; |
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72 | } |
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73 | |
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74 | static void |
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75 | put32(long w, FILE *fh) |
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76 | { |
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77 | putc((char)(w), fh); |
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78 | putc((char)(w >> 8l), fh); |
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79 | putc((char)(w >> 16l), fh); |
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80 | putc((char)(w >> 24l), fh); |
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81 | } |
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82 | |
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83 | #endif |
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84 | |
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85 | #ifdef HAVE_ROUND |
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86 | # include <math.h> |
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87 | extern double round(double); /* prototype is often missing... */ |
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88 | # define my_round round |
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89 | #else |
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90 | static double |
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91 | my_round(double x) { |
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92 | if (x >= 0.0) return floor(x + 0.5); |
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93 | return ceil(x - 0.5); |
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94 | } |
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95 | #endif |
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96 | |
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97 | /* portable case insensitive string compare */ |
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98 | #if defined(strcasecmp) || defined(HAVE_STRCASECMP) |
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99 | # define my_strcasecmp strcasecmp |
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100 | #else |
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101 | /* What about top bit set chars? */ |
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102 | int my_strcasecmp(const char *s1, const char *s2) { |
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103 | register c1, c2; |
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104 | do { |
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105 | c1 = *s1++; |
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106 | c2 = *s2++; |
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107 | } while (c1 && toupper(c1) == toupper(c2)); |
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108 | /* now calculate real difference */ |
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109 | return c1 - c2; |
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110 | } |
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111 | #endif |
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112 | |
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113 | unsigned int img_output_version = 3; |
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114 | |
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115 | #ifdef IMG_HOSTED |
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116 | static enum { |
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117 | IMG_NONE = 0, |
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118 | IMG_FILENOTFOUND = /*Couldn't open data file `%s'*/24, |
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119 | IMG_OUTOFMEMORY = /*Out of memory %.0s*/38, |
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120 | IMG_DIRECTORY = /*Filename `%s' refers to directory*/44, |
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121 | IMG_CANTOPENOUT = /*Failed to open output file `%s'*/47, |
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122 | IMG_BADFORMAT = /*Bad 3d image file `%s'*/106, |
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123 | IMG_READERROR = /*Error reading from file `%s'*/109, |
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124 | IMG_WRITEERROR = /*Error writing to file `%s'*/110, |
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125 | IMG_TOONEW = /*File `%s' has a newer format than this program can understand*/114 |
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126 | } img_errno = IMG_NONE; |
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127 | #else |
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128 | static img_errcode img_errno = IMG_NONE; |
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129 | #endif |
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130 | |
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131 | #define FILEID "Survex 3D Image File" |
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132 | |
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133 | #define EXT_PLT "plt" |
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134 | #define EXT_PLF "plf" |
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135 | #define EXT_XYZ "xyz" |
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136 | |
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137 | /* Attempt to string paste to ensure we are passed a literal string */ |
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138 | #define LITLEN(S) (sizeof(S"") - 1) |
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139 | |
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140 | static char * |
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141 | my_strdup(const char *str) |
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142 | { |
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143 | char *p; |
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144 | size_t len = strlen(str) + 1; |
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145 | p = xosmalloc(len); |
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146 | if (p) memcpy(p, str, len); |
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147 | return p; |
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148 | } |
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149 | |
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150 | static char * |
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151 | getline_alloc(FILE *fh) |
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152 | { |
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153 | int ch; |
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154 | size_t i = 0; |
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155 | size_t len = 16; |
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156 | char *buf = xosmalloc(len); |
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157 | if (!buf) return NULL; |
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158 | |
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159 | ch = getc(fh); |
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160 | while (ch != '\n' && ch != '\r' && ch != EOF) { |
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161 | buf[i++] = ch; |
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162 | if (i == len - 1) { |
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163 | char *p; |
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164 | len += len; |
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165 | p = xosrealloc(buf, len); |
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166 | if (!p) { |
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167 | osfree(buf); |
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168 | return NULL; |
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169 | } |
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170 | buf = p; |
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171 | } |
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172 | ch = getc(fh); |
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173 | } |
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174 | if (ch == '\n' || ch == '\r') { |
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175 | int otherone = ch ^ ('\n' ^ '\r'); |
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176 | ch = getc(fh); |
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177 | /* if it's not the other eol character, put it back */ |
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178 | if (ch != otherone) ungetc(ch, fh); |
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179 | } |
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180 | buf[i++] = '\0'; |
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181 | return buf; |
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182 | } |
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183 | |
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184 | #ifndef IMG_HOSTED |
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185 | img_errcode |
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186 | img_error(void) |
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187 | { |
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188 | return img_errno; |
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189 | } |
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190 | #else |
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191 | int |
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192 | img_error(void) |
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193 | { |
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194 | return (int)img_errno; |
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195 | } |
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196 | #endif |
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197 | |
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198 | static bool |
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199 | check_label_space(img *pimg, size_t len) |
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200 | { |
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201 | if (len > pimg->buf_len) { |
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202 | char *b = xosrealloc(pimg->label_buf, len); |
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203 | if (!b) return fFalse; |
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204 | pimg->label = (pimg->label - pimg->label_buf) + b; |
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205 | pimg->label_buf = b; |
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206 | pimg->buf_len = len; |
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207 | } |
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208 | return fTrue; |
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209 | } |
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210 | |
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211 | #define has_ext(F,L,E) ((L) > LITLEN(E) + 1 &&\ |
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212 | (F)[(L) - LITLEN(E) - 1] == FNM_SEP_EXT &&\ |
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213 | my_strcasecmp((F) + (L) - LITLEN(E), E) == 0) |
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214 | |
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215 | img * |
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216 | img_open_survey(const char *fnm, const char *survey) |
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217 | { |
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218 | img *pimg; |
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219 | size_t len; |
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220 | char buf[LITLEN(FILEID) + 1]; |
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221 | int ch; |
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222 | |
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223 | if (fDirectory(fnm)) { |
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224 | img_errno = IMG_DIRECTORY; |
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225 | return NULL; |
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226 | } |
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227 | |
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228 | pimg = (img *)xosmalloc(ossizeof(img)); |
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229 | if (pimg == NULL) { |
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230 | img_errno = IMG_OUTOFMEMORY; |
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231 | return NULL; |
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232 | } |
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233 | |
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234 | pimg->buf_len = 257; |
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235 | pimg->label_buf = xosmalloc(pimg->buf_len); |
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236 | if (!pimg->label_buf) { |
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237 | osfree(pimg); |
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238 | img_errno = IMG_OUTOFMEMORY; |
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239 | return NULL; |
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240 | } |
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241 | |
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242 | pimg->fh = fopenWithPthAndExt("", fnm, EXT_SVX_3D, "rb", NULL); |
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243 | if (pimg->fh == NULL) { |
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244 | osfree(pimg->label_buf); |
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245 | osfree(pimg); |
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246 | img_errno = IMG_FILENOTFOUND; |
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247 | return NULL; |
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248 | } |
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249 | |
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250 | pimg->fRead = fTrue; /* reading from this file */ |
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251 | img_errno = IMG_NONE; |
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252 | |
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253 | pimg->flags = 0; |
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254 | |
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255 | /* for version 3 we use label_buf to store the prefix for reuse */ |
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256 | /* for version -2, 0 value indicates we haven't entered a survey yet */ |
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257 | /* for version -4, we store the last station here to detect whether |
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258 | * we MOVE or LINE */ |
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259 | pimg->label_len = 0; |
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260 | pimg->label_buf[0] = '\0'; |
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261 | |
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262 | pimg->survey = NULL; |
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263 | pimg->survey_len = 0; |
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264 | pimg->separator = '.'; |
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265 | |
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266 | pimg->title = pimg->datestamp = NULL; |
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267 | if (survey) { |
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268 | len = strlen(survey); |
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269 | if (len) { |
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270 | if (survey[len - 1] == '.') len--; |
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271 | if (len) { |
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272 | char *p; |
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273 | pimg->survey = osmalloc(len + 2); |
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274 | memcpy(pimg->survey, survey, len); |
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275 | /* Set title to leaf survey name */ |
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276 | pimg->survey[len] = '\0'; |
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277 | p = strchr(pimg->survey, '.'); |
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278 | if (p) p++; else p = pimg->survey; |
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279 | pimg->title = my_strdup(p); |
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280 | if (!pimg->title) { |
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281 | img_errno = IMG_OUTOFMEMORY; |
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282 | goto error; |
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283 | } |
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284 | pimg->survey[len] = '.'; |
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285 | pimg->survey[len + 1] = '\0'; |
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286 | } |
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287 | } |
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288 | pimg->survey_len = len; |
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289 | } |
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290 | |
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291 | /* [version -2, -3, -4] pending IMG_LINE or IMG_MOVE - both have 4 added |
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292 | * [version -1] already skipped heading line, or there wasn't one |
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293 | * [version 0] not in the middle of a 'LINE' command |
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294 | * [version 3] not in the middle of turning a LINE into a MOVE |
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295 | */ |
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296 | pimg->pending = 0; |
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297 | |
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298 | len = strlen(fnm); |
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299 | if (has_ext(fnm, len, EXT_SVX_POS)) { |
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300 | pos_file: |
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301 | pimg->version = -1; |
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302 | if (!pimg->survey) pimg->title = baseleaf_from_fnm(fnm); |
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303 | pimg->datestamp = my_strdup(TIMENA); |
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304 | if (!pimg->datestamp) { |
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305 | img_errno = IMG_OUTOFMEMORY; |
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306 | goto error; |
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307 | } |
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308 | pimg->start = 0; |
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309 | return pimg; |
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310 | } |
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311 | |
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312 | if (has_ext(fnm, len, EXT_PLT) || has_ext(fnm, len, EXT_PLF)) { |
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313 | long fpos; |
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314 | plt_file: |
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315 | pimg->version = -2; |
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316 | /* Spaces aren't legal in Compass station names, but dots are, so |
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317 | * use space as the level separator */ |
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318 | pimg->separator = ' '; |
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319 | pimg->start = 0; |
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320 | if (!pimg->survey) pimg->title = baseleaf_from_fnm(fnm); |
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321 | pimg->datestamp = my_strdup(TIMENA); |
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322 | if (!pimg->datestamp) { |
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323 | img_errno = IMG_OUTOFMEMORY; |
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324 | goto error; |
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325 | } |
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326 | while (1) { |
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327 | int ch = getc(pimg->fh); |
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328 | switch (ch) { |
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329 | case '\x1a': |
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330 | fseek(pimg->fh, -1, SEEK_CUR); |
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331 | /* FALL THRU */ |
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332 | case EOF: |
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333 | pimg->start = ftell(pimg->fh); |
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334 | return pimg; |
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335 | case 'N': { |
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336 | char *line, *q; |
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337 | fpos = ftell(pimg->fh) - 1; |
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338 | if (!pimg->survey) { |
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339 | /* FIXME : if there's only one survey in the file, it'd be nice |
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340 | * to use its description as the title here... |
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341 | */ |
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342 | ungetc('N', pimg->fh); |
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343 | pimg->start = fpos; |
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344 | return pimg; |
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345 | } |
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346 | line = getline_alloc(pimg->fh); |
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347 | if (!line) { |
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348 | img_errno = IMG_OUTOFMEMORY; |
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349 | goto error; |
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350 | } |
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351 | len = 0; |
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352 | while (line[len] > 32) ++len; |
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353 | if (pimg->survey_len != len || |
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354 | memcmp(line, pimg->survey, len) != 0) { |
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355 | osfree(line); |
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356 | continue; |
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357 | } |
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358 | q = strchr(line + len, 'C'); |
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359 | if (q && q[1]) { |
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360 | osfree(pimg->title); |
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361 | pimg->title = my_strdup(q + 1); |
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362 | } else if (!pimg->title) { |
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363 | pimg->title = my_strdup(pimg->label); |
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364 | } |
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365 | osfree(line); |
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366 | if (!pimg->title) { |
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367 | img_errno = IMG_OUTOFMEMORY; |
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368 | goto error; |
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369 | } |
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370 | if (!pimg->start) pimg->start = fpos; |
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371 | fseek(pimg->fh, pimg->start, SEEK_SET); |
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372 | return pimg; |
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373 | } |
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374 | case 'M': case 'D': |
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375 | pimg->start = ftell(pimg->fh) - 1; |
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376 | break; |
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377 | } |
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378 | while (ch != '\n' && ch != '\r') { |
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379 | ch = getc(pimg->fh); |
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380 | } |
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381 | } |
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382 | } |
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383 | |
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384 | if (has_ext(fnm, len, EXT_XYZ)) { |
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385 | char *line; |
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386 | xyz_file: |
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387 | /* Spaces aren't legal in CMAP station names, but dots are, so |
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388 | * use space as the level separator */ |
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389 | pimg->separator = ' '; |
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390 | line = getline_alloc(pimg->fh); |
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391 | if (!line) { |
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392 | img_errno = IMG_OUTOFMEMORY; |
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393 | goto error; |
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394 | } |
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395 | /* FIXME: reparse date? */ |
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396 | len = strlen(line); |
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397 | if (len > 59) line[59] = '\0'; |
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398 | if (len > 45) { |
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399 | pimg->datestamp = my_strdup(line + 45); |
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400 | } else { |
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401 | pimg->datestamp = my_strdup(TIMENA); |
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402 | } |
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403 | if (strncmp(line, " Cave Survey Data Processed by CMAP ", |
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404 | LITLEN(" Cave Survey Data Processed by CMAP ")) == 0) { |
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405 | len = 0; |
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406 | } else { |
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407 | if (len > 45) { |
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408 | line[45] = '\0'; |
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409 | len = 45; |
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410 | } |
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411 | while (len > 2 && line[len - 1] == ' ') --len; |
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412 | if (len > 2) { |
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413 | line[len] = '\0'; |
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414 | pimg->title = my_strdup(line + 2); |
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415 | } |
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416 | } |
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417 | if (len <= 2) pimg->title = baseleaf_from_fnm(fnm); |
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418 | osfree(line); |
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419 | if (!pimg->datestamp || !pimg->title) { |
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420 | img_errno = IMG_OUTOFMEMORY; |
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421 | goto error; |
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422 | } |
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423 | line = getline_alloc(pimg->fh); |
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424 | if (!line) { |
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425 | img_errno = IMG_OUTOFMEMORY; |
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426 | goto error; |
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427 | } |
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428 | if (line[0] != ' ' || (line[1] != 'S' && line[1] != 'O')) { |
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429 | img_errno = IMG_BADFORMAT; |
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430 | goto error; |
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431 | } |
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432 | if (line[1] == 'S') { |
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433 | pimg->version = -3; /* Station format */ |
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434 | } else { |
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435 | pimg->version = -4; /* Shot format */ |
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436 | } |
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437 | osfree(line); |
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438 | line = getline_alloc(pimg->fh); |
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439 | if (!line) { |
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440 | img_errno = IMG_OUTOFMEMORY; |
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441 | goto error; |
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442 | } |
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443 | if (line[0] != ' ' || line[1] != '-') { |
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444 | img_errno = IMG_BADFORMAT; |
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445 | goto error; |
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446 | } |
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447 | osfree(line); |
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448 | pimg->start = ftell(pimg->fh); |
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449 | return pimg; |
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450 | } |
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451 | |
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452 | if (fread(buf, LITLEN(FILEID) + 1, 1, pimg->fh) != 1 || |
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453 | memcmp(buf, FILEID"\n", LITLEN(FILEID) + 1) != 0) { |
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454 | rewind(pimg->fh); |
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455 | if (buf[1] == ' ') { |
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456 | if (buf[0] == ' ') { |
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457 | /* Looks like a CMAP .xyz file ... */ |
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458 | goto xyz_file; |
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459 | } else if (strchr("ZSNF", buf[0])) { |
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460 | /* Looks like a Compass .plt file ... */ |
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461 | /* Almost certainly it'll start "Z " */ |
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462 | goto plt_file; |
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463 | } |
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464 | } |
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465 | if (buf[0] == '(') { |
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466 | /* Looks like a Survex .pos file ... */ |
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467 | goto pos_file; |
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468 | } |
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469 | img_errno = IMG_BADFORMAT; |
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470 | goto error; |
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471 | } |
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472 | |
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473 | /* check file format version */ |
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474 | ch = getc(pimg->fh); |
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475 | pimg->version = 0; |
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476 | if (tolower(ch) == 'b') { |
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477 | /* binary file iff B/b prefix */ |
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478 | pimg->version = 1; |
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479 | ch = getc(pimg->fh); |
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480 | } |
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481 | if (ch != 'v') { |
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482 | img_errno = IMG_BADFORMAT; |
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483 | goto error; |
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484 | } |
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485 | ch = getc(pimg->fh); |
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486 | if (ch == '0') { |
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487 | if (fread(buf, 4, 1, pimg->fh) != 1 || memcmp(buf, ".01\n", 4) != 0) { |
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488 | img_errno = IMG_BADFORMAT; |
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489 | goto error; |
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490 | } |
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491 | /* nothing special to do */ |
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492 | } else if (pimg->version == 0) { |
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493 | if (ch < '2' || ch > '3' || getc(pimg->fh) != '\n') { |
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494 | img_errno = IMG_TOONEW; |
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495 | goto error; |
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496 | } |
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497 | pimg->version = ch - '0'; |
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498 | } else { |
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499 | img_errno = IMG_BADFORMAT; |
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500 | goto error; |
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501 | } |
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502 | |
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503 | if (!pimg->title) |
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504 | pimg->title = getline_alloc(pimg->fh); |
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505 | else |
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506 | osfree(getline_alloc(pimg->fh)); |
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507 | pimg->datestamp = getline_alloc(pimg->fh); |
---|
508 | if (!pimg->title || !pimg->datestamp) { |
---|
509 | img_errno = IMG_OUTOFMEMORY; |
---|
510 | error: |
---|
511 | osfree(pimg->title); |
---|
512 | osfree(pimg->datestamp); |
---|
513 | fclose(pimg->fh); |
---|
514 | osfree(pimg); |
---|
515 | return NULL; |
---|
516 | } |
---|
517 | |
---|
518 | pimg->start = ftell(pimg->fh); |
---|
519 | |
---|
520 | return pimg; |
---|
521 | } |
---|
522 | |
---|
523 | int |
---|
524 | img_rewind(img *pimg) |
---|
525 | { |
---|
526 | if (!pimg->fRead) { |
---|
527 | img_errno = IMG_WRITEERROR; |
---|
528 | return 0; |
---|
529 | } |
---|
530 | if (fseek(pimg->fh, pimg->start, SEEK_SET) != 0) { |
---|
531 | img_errno = IMG_READERROR; |
---|
532 | return 0; |
---|
533 | } |
---|
534 | clearerr(pimg->fh); |
---|
535 | /* [version -1] already skipped heading line, or there wasn't one |
---|
536 | * [version 0] not in the middle of a 'LINE' command |
---|
537 | * [version 3] not in the middle of turning a LINE into a MOVE */ |
---|
538 | pimg->pending = 0; |
---|
539 | |
---|
540 | img_errno = IMG_NONE; |
---|
541 | |
---|
542 | /* for version 3 we use label_buf to store the prefix for reuse */ |
---|
543 | /* for version -2, 0 value indicates we haven't entered a survey yet */ |
---|
544 | /* for version -4, we store the last station here to detect whether |
---|
545 | * we MOVE or LINE */ |
---|
546 | pimg->label_len = 0; |
---|
547 | return 1; |
---|
548 | } |
---|
549 | |
---|
550 | img * |
---|
551 | img_open_write(const char *fnm, char *title_buf, bool fBinary) |
---|
552 | { |
---|
553 | time_t tm; |
---|
554 | img *pimg; |
---|
555 | |
---|
556 | fBinary = fBinary; |
---|
557 | |
---|
558 | if (fDirectory(fnm)) { |
---|
559 | img_errno = IMG_DIRECTORY; |
---|
560 | return NULL; |
---|
561 | } |
---|
562 | |
---|
563 | pimg = (img *)xosmalloc(ossizeof(img)); |
---|
564 | if (pimg == NULL) { |
---|
565 | img_errno = IMG_OUTOFMEMORY; |
---|
566 | return NULL; |
---|
567 | } |
---|
568 | |
---|
569 | pimg->buf_len = 257; |
---|
570 | pimg->label_buf = xosmalloc(pimg->buf_len); |
---|
571 | if (!pimg->label_buf) { |
---|
572 | osfree(pimg); |
---|
573 | img_errno = IMG_OUTOFMEMORY; |
---|
574 | return NULL; |
---|
575 | } |
---|
576 | |
---|
577 | pimg->fh = fopen(fnm, "wb"); |
---|
578 | if (!pimg->fh) { |
---|
579 | osfree(pimg->label_buf); |
---|
580 | osfree(pimg); |
---|
581 | img_errno = IMG_CANTOPENOUT; |
---|
582 | return NULL; |
---|
583 | } |
---|
584 | |
---|
585 | /* Output image file header */ |
---|
586 | fputs("Survex 3D Image File\n", pimg->fh); /* file identifier string */ |
---|
587 | if (img_output_version < 2) { |
---|
588 | pimg->version = 1; |
---|
589 | fputs("Bv0.01\n", pimg->fh); /* binary file format version number */ |
---|
590 | } else { |
---|
591 | pimg->version = (img_output_version > 2) ? 3 : 2; |
---|
592 | fprintf(pimg->fh, "v%d\n", pimg->version); /* file format version no. */ |
---|
593 | } |
---|
594 | fputsnl(title_buf, pimg->fh); |
---|
595 | tm = time(NULL); |
---|
596 | if (tm == (time_t)-1) { |
---|
597 | fputsnl(TIMENA, pimg->fh); |
---|
598 | } else { |
---|
599 | char date[256]; |
---|
600 | /* output current date and time in format specified */ |
---|
601 | strftime(date, 256, TIMEFMT, localtime(&tm)); |
---|
602 | fputsnl(date, pimg->fh); |
---|
603 | } |
---|
604 | pimg->fRead = fFalse; /* writing to this file */ |
---|
605 | img_errno = IMG_NONE; |
---|
606 | |
---|
607 | /* for version 3 we use label_buf to store the prefix for reuse */ |
---|
608 | pimg->label_buf[0] = '\0'; |
---|
609 | pimg->label_len = 0; |
---|
610 | |
---|
611 | /* Don't check for write errors now - let img_close() report them... */ |
---|
612 | return pimg; |
---|
613 | } |
---|
614 | |
---|
615 | static void |
---|
616 | read_xyz_station_coords(img_point *pt, const char *line) |
---|
617 | { |
---|
618 | char num[12]; |
---|
619 | memcpy(num, line + 6, 9); |
---|
620 | num[9] = '\0'; |
---|
621 | pt->x = atof(num) / METRES_PER_FOOT; |
---|
622 | memcpy(num, line + 15, 9); |
---|
623 | pt->y = atof(num) / METRES_PER_FOOT; |
---|
624 | memcpy(num, line + 24, 8); |
---|
625 | num[8] = '\0'; |
---|
626 | pt->z = atof(num) / METRES_PER_FOOT; |
---|
627 | } |
---|
628 | |
---|
629 | static void |
---|
630 | read_xyz_shot_coords(img_point *pt, const char *line) |
---|
631 | { |
---|
632 | char num[12]; |
---|
633 | memcpy(num, line + 40, 10); |
---|
634 | num[10] = '\0'; |
---|
635 | pt->x = atof(num) / METRES_PER_FOOT; |
---|
636 | memcpy(num, line + 50, 10); |
---|
637 | pt->y = atof(num) / METRES_PER_FOOT; |
---|
638 | memcpy(num, line + 60, 9); |
---|
639 | num[9] = '\0'; |
---|
640 | pt->z = atof(num) / METRES_PER_FOOT; |
---|
641 | } |
---|
642 | |
---|
643 | static void |
---|
644 | subtract_xyz_shot_deltas(img_point *pt, const char *line) |
---|
645 | { |
---|
646 | char num[12]; |
---|
647 | memcpy(num, line + 15, 9); |
---|
648 | num[9] = '\0'; |
---|
649 | pt->x -= atof(num) / METRES_PER_FOOT; |
---|
650 | memcpy(num, line + 24, 8); |
---|
651 | num[8] = '\0'; |
---|
652 | pt->y -= atof(num) / METRES_PER_FOOT; |
---|
653 | memcpy(num, line + 32, 8); |
---|
654 | pt->z -= atof(num) / METRES_PER_FOOT; |
---|
655 | } |
---|
656 | |
---|
657 | static int |
---|
658 | read_coord(FILE *fh, img_point *pt) |
---|
659 | { |
---|
660 | SVX_ASSERT(fh); |
---|
661 | SVX_ASSERT(pt); |
---|
662 | pt->x = get32(fh) / 100.0; |
---|
663 | pt->y = get32(fh) / 100.0; |
---|
664 | pt->z = get32(fh) / 100.0; |
---|
665 | if (ferror(fh) || feof(fh)) { |
---|
666 | img_errno = feof(fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
667 | return 0; |
---|
668 | } |
---|
669 | return 1; |
---|
670 | } |
---|
671 | |
---|
672 | static int |
---|
673 | skip_coord(FILE *fh) |
---|
674 | { |
---|
675 | return (fseek(fh, 12, SEEK_CUR) == 0); |
---|
676 | } |
---|
677 | |
---|
678 | int |
---|
679 | img_read_item(img *pimg, img_point *p) |
---|
680 | { |
---|
681 | int result; |
---|
682 | pimg->flags = 0; |
---|
683 | |
---|
684 | if (pimg->version == 3) { |
---|
685 | int opt; |
---|
686 | if (pimg->pending >= 0x80) { |
---|
687 | *p = pimg->mv; |
---|
688 | pimg->flags = (int)(pimg->pending) & 0x3f; |
---|
689 | pimg->pending = 0; |
---|
690 | return img_LINE; |
---|
691 | } |
---|
692 | again3: /* label to goto if we get a prefix */ |
---|
693 | pimg->label = pimg->label_buf; |
---|
694 | opt = getc(pimg->fh); |
---|
695 | if (opt == EOF) { |
---|
696 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
697 | return img_BAD; |
---|
698 | } |
---|
699 | switch (opt >> 6) { |
---|
700 | case 0: |
---|
701 | if (opt == 0) { |
---|
702 | if (!pimg->label_len) return img_STOP; /* end of data marker */ |
---|
703 | pimg->label_len = 0; |
---|
704 | goto again3; |
---|
705 | } |
---|
706 | if (opt < 15) { |
---|
707 | /* 1-14 mean trim that many levels from current prefix */ |
---|
708 | int c; |
---|
709 | if (pimg->label_len <= 16) { |
---|
710 | /* zero prefix using "0" */ |
---|
711 | img_errno = IMG_BADFORMAT; |
---|
712 | return img_BAD; |
---|
713 | } |
---|
714 | c = pimg->label_len - 16 - 1; |
---|
715 | while (pimg->label_buf[c] != '.' || --opt > 0) { |
---|
716 | if (--c < 0) { |
---|
717 | /* zero prefix using "0" */ |
---|
718 | img_errno = IMG_BADFORMAT; |
---|
719 | return img_BAD; |
---|
720 | } |
---|
721 | } |
---|
722 | c++; |
---|
723 | pimg->label_len = c; |
---|
724 | goto again3; |
---|
725 | } |
---|
726 | if (opt == 15) { |
---|
727 | result = img_MOVE; |
---|
728 | break; |
---|
729 | } |
---|
730 | /* 16-31 mean remove (n - 15) characters from the prefix */ |
---|
731 | /* zero prefix using 0 */ |
---|
732 | if (pimg->label_len <= (size_t)(opt - 15)) { |
---|
733 | img_errno = IMG_BADFORMAT; |
---|
734 | return img_BAD; |
---|
735 | } |
---|
736 | pimg->label_len -= (opt - 15); |
---|
737 | goto again3; |
---|
738 | case 1: case 2: { |
---|
739 | char *q; |
---|
740 | long len = getc(pimg->fh); |
---|
741 | if (len == EOF) { |
---|
742 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
743 | return img_BAD; |
---|
744 | } |
---|
745 | if (len == 0xfe) { |
---|
746 | len += get16(pimg->fh); |
---|
747 | if (feof(pimg->fh)) { |
---|
748 | img_errno = IMG_BADFORMAT; |
---|
749 | return img_BAD; |
---|
750 | } |
---|
751 | if (ferror(pimg->fh)) { |
---|
752 | img_errno = IMG_READERROR; |
---|
753 | return img_BAD; |
---|
754 | } |
---|
755 | } else if (len == 0xff) { |
---|
756 | len = get32(pimg->fh); |
---|
757 | if (ferror(pimg->fh)) { |
---|
758 | img_errno = IMG_READERROR; |
---|
759 | return img_BAD; |
---|
760 | } |
---|
761 | if (feof(pimg->fh) || len < 0xfe + 0xffff) { |
---|
762 | img_errno = IMG_BADFORMAT; |
---|
763 | return img_BAD; |
---|
764 | } |
---|
765 | } |
---|
766 | |
---|
767 | if (!check_label_space(pimg, pimg->label_len + len + 1)) { |
---|
768 | img_errno = IMG_OUTOFMEMORY; |
---|
769 | return img_BAD; |
---|
770 | } |
---|
771 | q = pimg->label_buf + pimg->label_len; |
---|
772 | pimg->label_len += len; |
---|
773 | if (len && fread(q, len, 1, pimg->fh) != 1) { |
---|
774 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
775 | return img_BAD; |
---|
776 | } |
---|
777 | q[len] = '\0'; |
---|
778 | |
---|
779 | result = opt & 0x40 ? img_LABEL : img_LINE; |
---|
780 | |
---|
781 | if (pimg->survey_len) { |
---|
782 | size_t l = pimg->survey_len; |
---|
783 | const char *s = pimg->label_buf; |
---|
784 | if (result == img_LINE) { |
---|
785 | if (strncmp(pimg->survey, s, l) != 0 || |
---|
786 | !(s[l] == '.' || s[l] == '\0')) { |
---|
787 | if (!read_coord(pimg->fh, &(pimg->mv))) return img_BAD; |
---|
788 | pimg->pending = 15; |
---|
789 | goto again3; |
---|
790 | } |
---|
791 | } else { |
---|
792 | if (strncmp(pimg->survey, s, l + 1) != 0) { |
---|
793 | if (!skip_coord(pimg->fh)) return img_BAD; |
---|
794 | pimg->pending = 0; |
---|
795 | goto again3; |
---|
796 | } |
---|
797 | } |
---|
798 | pimg->label += l; |
---|
799 | /* skip the dot if there */ |
---|
800 | if (*pimg->label) pimg->label++; |
---|
801 | } |
---|
802 | |
---|
803 | if (result == img_LINE && pimg->pending) { |
---|
804 | *p = pimg->mv; |
---|
805 | if (!read_coord(pimg->fh, &(pimg->mv))) return img_BAD; |
---|
806 | pimg->pending = opt; |
---|
807 | return img_MOVE; |
---|
808 | } |
---|
809 | pimg->flags = (int)opt & 0x3f; |
---|
810 | break; |
---|
811 | } |
---|
812 | default: |
---|
813 | img_errno = IMG_BADFORMAT; |
---|
814 | return img_BAD; |
---|
815 | } |
---|
816 | if (!read_coord(pimg->fh, p)) return img_BAD; |
---|
817 | pimg->pending = 0; |
---|
818 | return result; |
---|
819 | } |
---|
820 | |
---|
821 | pimg->label = pimg->label_buf; |
---|
822 | |
---|
823 | if (pimg->version > 0) { |
---|
824 | static long opt_lookahead = 0; |
---|
825 | static img_point pt = { 0.0, 0.0, 0.0 }; |
---|
826 | long opt; |
---|
827 | again: /* label to goto if we get a cross */ |
---|
828 | pimg->label[0] = '\0'; |
---|
829 | |
---|
830 | if (pimg->version == 1) { |
---|
831 | if (opt_lookahead) { |
---|
832 | opt = opt_lookahead; |
---|
833 | opt_lookahead = 0; |
---|
834 | } else { |
---|
835 | opt = get32(pimg->fh); |
---|
836 | } |
---|
837 | } else { |
---|
838 | opt = getc(pimg->fh); |
---|
839 | } |
---|
840 | |
---|
841 | if (feof(pimg->fh)) { |
---|
842 | img_errno = IMG_BADFORMAT; |
---|
843 | return img_BAD; |
---|
844 | } |
---|
845 | if (ferror(pimg->fh)) { |
---|
846 | img_errno = IMG_READERROR; |
---|
847 | return img_BAD; |
---|
848 | } |
---|
849 | |
---|
850 | switch (opt) { |
---|
851 | case -1: case 0: |
---|
852 | return img_STOP; /* end of data marker */ |
---|
853 | case 1: |
---|
854 | /* skip coordinates */ |
---|
855 | if (!skip_coord(pimg->fh)) { |
---|
856 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
857 | return img_BAD; |
---|
858 | } |
---|
859 | goto again; |
---|
860 | case 2: case 3: { |
---|
861 | char *q; |
---|
862 | int ch; |
---|
863 | result = img_LABEL; |
---|
864 | ch = getc(pimg->fh); |
---|
865 | if (ch == EOF) { |
---|
866 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
867 | return img_BAD; |
---|
868 | } |
---|
869 | if (ch != '\\') ungetc(ch, pimg->fh); |
---|
870 | fgets(pimg->label_buf, 257, pimg->fh); |
---|
871 | if (feof(pimg->fh)) { |
---|
872 | img_errno = IMG_BADFORMAT; |
---|
873 | return img_BAD; |
---|
874 | } |
---|
875 | if (ferror(pimg->fh)) { |
---|
876 | img_errno = IMG_READERROR; |
---|
877 | return img_BAD; |
---|
878 | } |
---|
879 | q = pimg->label_buf + strlen(pimg->label_buf) - 1; |
---|
880 | if (*q != '\n') { |
---|
881 | img_errno = IMG_BADFORMAT; |
---|
882 | return img_BAD; |
---|
883 | } |
---|
884 | /* Ignore empty labels in some .3d files (caused by a bug) */ |
---|
885 | if (q == pimg->label_buf) goto again; |
---|
886 | *q = '\0'; |
---|
887 | pimg->flags = img_SFLAG_UNDERGROUND; /* no flags given... */ |
---|
888 | if (opt == 2) goto done; |
---|
889 | break; |
---|
890 | } |
---|
891 | case 6: case 7: { |
---|
892 | long len; |
---|
893 | result = img_LABEL; |
---|
894 | |
---|
895 | if (opt == 7) |
---|
896 | pimg->flags = getc(pimg->fh); |
---|
897 | else |
---|
898 | pimg->flags = img_SFLAG_UNDERGROUND; /* no flags given... */ |
---|
899 | |
---|
900 | len = get32(pimg->fh); |
---|
901 | |
---|
902 | if (feof(pimg->fh)) { |
---|
903 | img_errno = IMG_BADFORMAT; |
---|
904 | return img_BAD; |
---|
905 | } |
---|
906 | if (ferror(pimg->fh)) { |
---|
907 | img_errno = IMG_READERROR; |
---|
908 | return img_BAD; |
---|
909 | } |
---|
910 | |
---|
911 | /* Ignore empty labels in some .3d files (caused by a bug) */ |
---|
912 | if (len == 0) goto again; |
---|
913 | if (!check_label_space(pimg, len + 1)) { |
---|
914 | img_errno = IMG_OUTOFMEMORY; |
---|
915 | return img_BAD; |
---|
916 | } |
---|
917 | if (fread(pimg->label_buf, len, 1, pimg->fh) != 1) { |
---|
918 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
919 | return img_BAD; |
---|
920 | } |
---|
921 | pimg->label_buf[len] = '\0'; |
---|
922 | break; |
---|
923 | } |
---|
924 | case 4: |
---|
925 | result = img_MOVE; |
---|
926 | break; |
---|
927 | case 5: |
---|
928 | result = img_LINE; |
---|
929 | break; |
---|
930 | default: |
---|
931 | switch ((int)opt & 0xc0) { |
---|
932 | case 0x80: |
---|
933 | pimg->flags = (int)opt & 0x3f; |
---|
934 | result = img_LINE; |
---|
935 | break; |
---|
936 | case 0x40: { |
---|
937 | char *q; |
---|
938 | pimg->flags = (int)opt & 0x3f; |
---|
939 | result = img_LABEL; |
---|
940 | if (!fgets(pimg->label_buf, 257, pimg->fh)) { |
---|
941 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
942 | return img_BAD; |
---|
943 | } |
---|
944 | q = pimg->label_buf + strlen(pimg->label_buf) - 1; |
---|
945 | /* Ignore empty-labels in some .3d files (caused by a bug) */ |
---|
946 | if (q == pimg->label_buf) goto again; |
---|
947 | if (*q != '\n') { |
---|
948 | img_errno = IMG_BADFORMAT; |
---|
949 | return img_BAD; |
---|
950 | } |
---|
951 | *q = '\0'; |
---|
952 | break; |
---|
953 | } |
---|
954 | case 0xc0: |
---|
955 | /* use this for an extra leg or station flag if we need it */ |
---|
956 | default: |
---|
957 | img_errno = IMG_BADFORMAT; |
---|
958 | return img_BAD; |
---|
959 | } |
---|
960 | break; |
---|
961 | } |
---|
962 | |
---|
963 | if (!read_coord(pimg->fh, &pt)) return img_BAD; |
---|
964 | |
---|
965 | if (result == img_LABEL && pimg->survey_len) { |
---|
966 | if (strncmp(pimg->label_buf, pimg->survey, pimg->survey_len + 1) != 0) |
---|
967 | goto again; |
---|
968 | pimg->label += pimg->survey_len + 1; |
---|
969 | } |
---|
970 | |
---|
971 | done: |
---|
972 | *p = pt; |
---|
973 | |
---|
974 | if (result == img_MOVE && pimg->version == 1) { |
---|
975 | /* peek at next code and see if it's an old-style label */ |
---|
976 | opt_lookahead = get32(pimg->fh); |
---|
977 | |
---|
978 | if (feof(pimg->fh)) { |
---|
979 | img_errno = IMG_BADFORMAT; |
---|
980 | return img_BAD; |
---|
981 | } |
---|
982 | if (ferror(pimg->fh)) { |
---|
983 | img_errno = IMG_READERROR; |
---|
984 | return img_BAD; |
---|
985 | } |
---|
986 | |
---|
987 | if (opt_lookahead == 2) return img_read_item(pimg, p); |
---|
988 | } |
---|
989 | |
---|
990 | return result; |
---|
991 | } else if (pimg->version == 0) { |
---|
992 | ascii_again: |
---|
993 | pimg->label[0] = '\0'; |
---|
994 | if (feof(pimg->fh)) return img_STOP; |
---|
995 | if (pimg->pending) { |
---|
996 | pimg->pending = 0; |
---|
997 | result = img_LINE; |
---|
998 | } else { |
---|
999 | char cmd[7]; |
---|
1000 | /* Stop if nothing found */ |
---|
1001 | if (fscanf(pimg->fh, "%6s", cmd) < 1) return img_STOP; |
---|
1002 | if (strcmp(cmd, "move") == 0) |
---|
1003 | result = img_MOVE; |
---|
1004 | else if (strcmp(cmd, "draw") == 0) |
---|
1005 | result = img_LINE; |
---|
1006 | else if (strcmp(cmd, "line") == 0) { |
---|
1007 | /* set flag to indicate to process second triplet as LINE */ |
---|
1008 | pimg->pending = 1; |
---|
1009 | result = img_MOVE; |
---|
1010 | } else if (strcmp(cmd, "cross") == 0) { |
---|
1011 | if (fscanf(pimg->fh, "%lf%lf%lf", &p->x, &p->y, &p->z) < 3) { |
---|
1012 | img_errno = feof(pimg->fh) ? IMG_BADFORMAT : IMG_READERROR; |
---|
1013 | return img_BAD; |
---|
1014 | } |
---|
1015 | goto ascii_again; |
---|
1016 | } else if (strcmp(cmd, "name") == 0) { |
---|
1017 | size_t off = 0; |
---|
1018 | int ch = getc(pimg->fh); |
---|
1019 | if (ch == ' ') ch = getc(pimg->fh); |
---|
1020 | while (ch != ' ') { |
---|
1021 | if (ch == '\n' || ch == EOF) { |
---|
1022 | img_errno = ferror(pimg->fh) ? IMG_READERROR : IMG_BADFORMAT; |
---|
1023 | return img_BAD; |
---|
1024 | } |
---|
1025 | if (off == pimg->buf_len) { |
---|
1026 | if (!check_label_space(pimg, pimg->buf_len * 2)) { |
---|
1027 | img_errno = IMG_OUTOFMEMORY; |
---|
1028 | return img_BAD; |
---|
1029 | } |
---|
1030 | } |
---|
1031 | pimg->label_buf[off++] = ch; |
---|
1032 | ch = getc(pimg->fh); |
---|
1033 | } |
---|
1034 | pimg->label_buf[off] = '\0'; |
---|
1035 | |
---|
1036 | pimg->label = pimg->label_buf; |
---|
1037 | if (pimg->label[0] == '\\') pimg->label++; |
---|
1038 | |
---|
1039 | result = img_LABEL; |
---|
1040 | } else { |
---|
1041 | img_errno = IMG_BADFORMAT; |
---|
1042 | return img_BAD; /* unknown keyword */ |
---|
1043 | } |
---|
1044 | } |
---|
1045 | |
---|
1046 | if (fscanf(pimg->fh, "%lf%lf%lf", &p->x, &p->y, &p->z) < 3) { |
---|
1047 | img_errno = ferror(pimg->fh) ? IMG_READERROR : IMG_BADFORMAT; |
---|
1048 | return img_BAD; |
---|
1049 | } |
---|
1050 | |
---|
1051 | if (result == img_LABEL && pimg->survey_len) { |
---|
1052 | if (strncmp(pimg->label, pimg->survey, pimg->survey_len + 1) != 0) |
---|
1053 | goto ascii_again; |
---|
1054 | pimg->label += pimg->survey_len + 1; |
---|
1055 | } |
---|
1056 | |
---|
1057 | return result; |
---|
1058 | } else if (pimg->version == -1) { |
---|
1059 | /* version -1: .pos file */ |
---|
1060 | size_t off; |
---|
1061 | pimg->flags = img_SFLAG_UNDERGROUND; /* default flags */ |
---|
1062 | againpos: |
---|
1063 | off = 0; |
---|
1064 | while (fscanf(pimg->fh, "(%lf,%lf,%lf ) ", &p->x, &p->y, &p->z) != 3) { |
---|
1065 | int ch; |
---|
1066 | if (ferror(pimg->fh)) { |
---|
1067 | img_errno = IMG_READERROR; |
---|
1068 | return img_BAD; |
---|
1069 | } |
---|
1070 | if (feof(pimg->fh)) return img_STOP; |
---|
1071 | if (pimg->pending) { |
---|
1072 | img_errno = IMG_BADFORMAT; |
---|
1073 | return img_BAD; |
---|
1074 | } |
---|
1075 | pimg->pending = 1; |
---|
1076 | /* ignore rest of line */ |
---|
1077 | do { |
---|
1078 | ch = getc(pimg->fh); |
---|
1079 | } while (ch != '\n' && ch != '\r' && ch != EOF); |
---|
1080 | } |
---|
1081 | |
---|
1082 | pimg->label_buf[0] = '\0'; |
---|
1083 | while (!feof(pimg->fh)) { |
---|
1084 | if (!fgets(pimg->label_buf + off, pimg->buf_len - off, pimg->fh)) { |
---|
1085 | img_errno = IMG_READERROR; |
---|
1086 | return img_BAD; |
---|
1087 | } |
---|
1088 | |
---|
1089 | off += strlen(pimg->label_buf + off); |
---|
1090 | if (off && pimg->label_buf[off - 1] == '\n') { |
---|
1091 | pimg->label_buf[off - 1] = '\0'; |
---|
1092 | break; |
---|
1093 | } |
---|
1094 | if (!check_label_space(pimg, pimg->buf_len * 2)) { |
---|
1095 | img_errno = IMG_OUTOFMEMORY; |
---|
1096 | return img_BAD; |
---|
1097 | } |
---|
1098 | } |
---|
1099 | |
---|
1100 | pimg->label = pimg->label_buf; |
---|
1101 | |
---|
1102 | if (pimg->label[0] == '\\') pimg->label++; |
---|
1103 | |
---|
1104 | if (pimg->survey_len) { |
---|
1105 | size_t l = pimg->survey_len + 1; |
---|
1106 | if (strncmp(pimg->survey, pimg->label, l) != 0) goto againpos; |
---|
1107 | pimg->label += l; |
---|
1108 | } |
---|
1109 | |
---|
1110 | return img_LABEL; |
---|
1111 | } else if (pimg->version == -2) { |
---|
1112 | /* version -2: Compass .plt file */ |
---|
1113 | if (pimg->pending > 0) { |
---|
1114 | /* -1 signals we've entered the first survey we want to |
---|
1115 | * read, and need to fudge lots if the first action is 'D'... |
---|
1116 | */ |
---|
1117 | /* pending MOVE or LINE */ |
---|
1118 | int r = pimg->pending - 4; |
---|
1119 | pimg->pending = 0; |
---|
1120 | pimg->flags = 0; |
---|
1121 | pimg->label[pimg->label_len] = '\0'; |
---|
1122 | return r; |
---|
1123 | } |
---|
1124 | |
---|
1125 | while (1) { |
---|
1126 | char *line; |
---|
1127 | char *q; |
---|
1128 | size_t len = 0; |
---|
1129 | int ch = getc(pimg->fh); |
---|
1130 | |
---|
1131 | switch (ch) { |
---|
1132 | case '\x1a': case EOF: /* Don't insist on ^Z at end of file */ |
---|
1133 | return img_STOP; |
---|
1134 | case 'X': case 'F': case 'S': |
---|
1135 | /* bounding boX (marks end of survey), Feature survey, or |
---|
1136 | * new Section - skip to next survey */ |
---|
1137 | if (pimg->survey) return img_STOP; |
---|
1138 | skip_to_N: |
---|
1139 | while (1) { |
---|
1140 | do { |
---|
1141 | ch = getc(pimg->fh); |
---|
1142 | } while (ch != '\n' && ch != '\r' && ch != EOF); |
---|
1143 | while (ch == '\n' || ch == '\r') ch = getc(pimg->fh); |
---|
1144 | if (ch == 'N') break; |
---|
1145 | if (ch == '\x1a' || ch == EOF) return img_STOP; |
---|
1146 | } |
---|
1147 | /* FALLTHRU */ |
---|
1148 | case 'N': |
---|
1149 | line = getline_alloc(pimg->fh); |
---|
1150 | if (!line) { |
---|
1151 | img_errno = IMG_OUTOFMEMORY; |
---|
1152 | return img_BAD; |
---|
1153 | } |
---|
1154 | while (line[len] > 32) ++len; |
---|
1155 | if (pimg->label_len == 0) pimg->pending = -1; |
---|
1156 | if (!check_label_space(pimg, len + 1)) { |
---|
1157 | osfree(line); |
---|
1158 | img_errno = IMG_OUTOFMEMORY; |
---|
1159 | return img_BAD; |
---|
1160 | } |
---|
1161 | pimg->label_len = len; |
---|
1162 | pimg->label = pimg->label_buf; |
---|
1163 | memcpy(pimg->label, line, len); |
---|
1164 | pimg->label[len] = '\0'; |
---|
1165 | osfree(line); |
---|
1166 | break; |
---|
1167 | case 'M': case 'D': { |
---|
1168 | /* Move or Draw */ |
---|
1169 | long fpos = -1; |
---|
1170 | if (pimg->survey && pimg->label_len == 0) { |
---|
1171 | /* We're only holding onto this line in case the first line |
---|
1172 | * of the 'N' is a 'D', so skip it for now... |
---|
1173 | */ |
---|
1174 | goto skip_to_N; |
---|
1175 | } |
---|
1176 | if (ch == 'D' && pimg->pending == -1) { |
---|
1177 | if (pimg->survey) { |
---|
1178 | fpos = ftell(pimg->fh) - 1; |
---|
1179 | fseek(pimg->fh, pimg->start, SEEK_SET); |
---|
1180 | ch = getc(pimg->fh); |
---|
1181 | pimg->pending = 0; |
---|
1182 | } else { |
---|
1183 | /* If a file actually has a 'D' before any 'M', then |
---|
1184 | * pretend the 'D' is an 'M' - one of the examples |
---|
1185 | * in the docs was like this! */ |
---|
1186 | ch = 'M'; |
---|
1187 | } |
---|
1188 | } |
---|
1189 | line = getline_alloc(pimg->fh); |
---|
1190 | if (!line) { |
---|
1191 | img_errno = IMG_OUTOFMEMORY; |
---|
1192 | return img_BAD; |
---|
1193 | } |
---|
1194 | /* Compass store coordinates as North, East, Up = (y,x,z)! */ |
---|
1195 | if (sscanf(line, "%lf%lf%lf", &p->y, &p->x, &p->z) != 3) { |
---|
1196 | osfree(line); |
---|
1197 | if (ferror(pimg->fh)) { |
---|
1198 | img_errno = IMG_READERROR; |
---|
1199 | } else { |
---|
1200 | img_errno = IMG_BADFORMAT; |
---|
1201 | } |
---|
1202 | return img_BAD; |
---|
1203 | } |
---|
1204 | p->x *= METRES_PER_FOOT; |
---|
1205 | p->y *= METRES_PER_FOOT; |
---|
1206 | p->z *= METRES_PER_FOOT; |
---|
1207 | q = strchr(line, 'S'); |
---|
1208 | if (!q) { |
---|
1209 | osfree(line); |
---|
1210 | img_errno = IMG_BADFORMAT; |
---|
1211 | return img_BAD; |
---|
1212 | } |
---|
1213 | ++q; |
---|
1214 | len = 0; |
---|
1215 | while (q[len] > ' ') ++len; |
---|
1216 | q[len] = '\0'; |
---|
1217 | len += 2; /* ' ' and '\0' */ |
---|
1218 | if (!check_label_space(pimg, pimg->label_len + len)) { |
---|
1219 | img_errno = IMG_OUTOFMEMORY; |
---|
1220 | return img_BAD; |
---|
1221 | } |
---|
1222 | pimg->label = pimg->label_buf; |
---|
1223 | pimg->label[pimg->label_len] = ' '; |
---|
1224 | memcpy(pimg->label + pimg->label_len + 1, q, len - 1); |
---|
1225 | osfree(line); |
---|
1226 | pimg->flags = img_SFLAG_UNDERGROUND; /* default flags */ |
---|
1227 | if (fpos != -1) { |
---|
1228 | fseek(pimg->fh, fpos, SEEK_SET); |
---|
1229 | } else { |
---|
1230 | pimg->pending = (ch == 'M' ? img_MOVE : img_LINE) + 4; |
---|
1231 | } |
---|
1232 | return img_LABEL; |
---|
1233 | } |
---|
1234 | default: |
---|
1235 | img_errno = IMG_BADFORMAT; |
---|
1236 | return img_BAD; |
---|
1237 | } |
---|
1238 | } |
---|
1239 | } else { |
---|
1240 | /* version -3 or -4: CMAP .xyz file */ |
---|
1241 | char *line = NULL; |
---|
1242 | char *q; |
---|
1243 | size_t len; |
---|
1244 | |
---|
1245 | if (pimg->pending) { |
---|
1246 | /* pending MOVE or LINE or LABEL or STOP */ |
---|
1247 | int r = pimg->pending - 4; |
---|
1248 | /* Set label to empty - don't use "" as we adjust label relative |
---|
1249 | * to label_buf when label_buf is reallocated. */ |
---|
1250 | pimg->label = pimg->label_buf + strlen(pimg->label_buf); |
---|
1251 | pimg->flags = 0; |
---|
1252 | if (r == img_LABEL) { |
---|
1253 | /* nasty magic */ |
---|
1254 | read_xyz_shot_coords(p, pimg->label_buf + 16); |
---|
1255 | subtract_xyz_shot_deltas(p, pimg->label_buf + 16); |
---|
1256 | pimg->pending = img_STOP + 4; |
---|
1257 | return img_MOVE; |
---|
1258 | } |
---|
1259 | |
---|
1260 | pimg->pending = 0; |
---|
1261 | |
---|
1262 | if (r == img_STOP) { |
---|
1263 | /* nasty magic */ |
---|
1264 | read_xyz_shot_coords(p, pimg->label_buf + 16); |
---|
1265 | return img_LINE; |
---|
1266 | } |
---|
1267 | |
---|
1268 | return r; |
---|
1269 | } |
---|
1270 | |
---|
1271 | pimg->label = pimg->label_buf; |
---|
1272 | do { |
---|
1273 | osfree(line); |
---|
1274 | if (feof(pimg->fh)) return img_STOP; |
---|
1275 | line = getline_alloc(pimg->fh); |
---|
1276 | if (!line) { |
---|
1277 | img_errno = IMG_OUTOFMEMORY; |
---|
1278 | return img_BAD; |
---|
1279 | } |
---|
1280 | } while (line[0] == ' ' || line[0] == '\0'); |
---|
1281 | if (line[0] == '\x1a') return img_STOP; |
---|
1282 | |
---|
1283 | len = strlen(line); |
---|
1284 | if (pimg->version == -3) { |
---|
1285 | /* station variant */ |
---|
1286 | if (len < 37) { |
---|
1287 | osfree(line); |
---|
1288 | img_errno = IMG_BADFORMAT; |
---|
1289 | return img_BAD; |
---|
1290 | } |
---|
1291 | memcpy(pimg->label, line, 6); |
---|
1292 | q = memchr(pimg->label, ' ', 6); |
---|
1293 | if (!q) q = pimg->label + 6; |
---|
1294 | *q = '\0'; |
---|
1295 | |
---|
1296 | read_xyz_station_coords(p, line); |
---|
1297 | |
---|
1298 | /* FIXME: look at prev for lines (line + 32, 5) */ |
---|
1299 | /* FIXME: duplicate stations... */ |
---|
1300 | return img_LABEL; |
---|
1301 | } else { |
---|
1302 | /* Shot variant */ |
---|
1303 | char old[8], new[8]; |
---|
1304 | if (len < 61) { |
---|
1305 | osfree(line); |
---|
1306 | img_errno = IMG_BADFORMAT; |
---|
1307 | return img_BAD; |
---|
1308 | } |
---|
1309 | |
---|
1310 | memcpy(old, line, 7); |
---|
1311 | q = memchr(old, ' ', 7); |
---|
1312 | if (!q) q = old + 7; |
---|
1313 | *q = '\0'; |
---|
1314 | |
---|
1315 | memcpy(new, line + 7, 7); |
---|
1316 | q = memchr(new, ' ', 7); |
---|
1317 | if (!q) q = new + 7; |
---|
1318 | *q = '\0'; |
---|
1319 | |
---|
1320 | pimg->flags = img_SFLAG_UNDERGROUND; |
---|
1321 | |
---|
1322 | if (strcmp(old, new) == 0) { |
---|
1323 | pimg->pending = img_MOVE + 4; |
---|
1324 | read_xyz_shot_coords(p, line); |
---|
1325 | strcpy(pimg->label, new); |
---|
1326 | osfree(line); |
---|
1327 | return img_LABEL; |
---|
1328 | } |
---|
1329 | |
---|
1330 | if (strcmp(old, pimg->label) == 0) { |
---|
1331 | pimg->pending = img_LINE + 4; |
---|
1332 | read_xyz_shot_coords(p, line); |
---|
1333 | strcpy(pimg->label, new); |
---|
1334 | osfree(line); |
---|
1335 | return img_LABEL; |
---|
1336 | } |
---|
1337 | |
---|
1338 | pimg->pending = img_LABEL + 4; |
---|
1339 | read_xyz_shot_coords(p, line); |
---|
1340 | strcpy(pimg->label, new); |
---|
1341 | memcpy(pimg->label + 16, line, 70); |
---|
1342 | |
---|
1343 | osfree(line); |
---|
1344 | return img_LABEL; |
---|
1345 | } |
---|
1346 | } |
---|
1347 | } |
---|
1348 | |
---|
1349 | static int |
---|
1350 | write_v3label(img *pimg, int opt, const char *s) |
---|
1351 | { |
---|
1352 | size_t len, n, dot; |
---|
1353 | |
---|
1354 | /* find length of common prefix */ |
---|
1355 | dot = 0; |
---|
1356 | for (len = 0; s[len] == pimg->label_buf[len] && s[len] != '\0'; len++) { |
---|
1357 | if (s[len] == '.') dot = len + 1; |
---|
1358 | } |
---|
1359 | |
---|
1360 | SVX_ASSERT(len <= pimg->label_len); |
---|
1361 | n = pimg->label_len - len; |
---|
1362 | if (len == 0) { |
---|
1363 | if (pimg->label_len) putc(0, pimg->fh); |
---|
1364 | } else if (n <= 16) { |
---|
1365 | if (n) putc(n + 15, pimg->fh); |
---|
1366 | } else if (dot == 0) { |
---|
1367 | if (pimg->label_len) putc(0, pimg->fh); |
---|
1368 | len = 0; |
---|
1369 | } else { |
---|
1370 | const char *p = pimg->label_buf + dot; |
---|
1371 | n = 1; |
---|
1372 | for (len = pimg->label_len - dot - 17; len; len--) { |
---|
1373 | if (*p++ == '.') n++; |
---|
1374 | } |
---|
1375 | if (n <= 14) { |
---|
1376 | putc(n, pimg->fh); |
---|
1377 | len = dot; |
---|
1378 | } else { |
---|
1379 | if (pimg->label_len) putc(0, pimg->fh); |
---|
1380 | len = 0; |
---|
1381 | } |
---|
1382 | } |
---|
1383 | |
---|
1384 | n = strlen(s + len); |
---|
1385 | putc(opt, pimg->fh); |
---|
1386 | if (n < 0xfe) { |
---|
1387 | putc(n, pimg->fh); |
---|
1388 | } else if (n < 0xffff + 0xfe) { |
---|
1389 | putc(0xfe, pimg->fh); |
---|
1390 | put16(n - 0xfe, pimg->fh); |
---|
1391 | } else { |
---|
1392 | putc(0xff, pimg->fh); |
---|
1393 | put32(n, pimg->fh); |
---|
1394 | } |
---|
1395 | fwrite(s + len, n, 1, pimg->fh); |
---|
1396 | |
---|
1397 | n += len; |
---|
1398 | pimg->label_len = n; |
---|
1399 | if (!check_label_space(pimg, n + 1)) |
---|
1400 | return 0; /* FIXME: distinguish out of memory... */ |
---|
1401 | memcpy(pimg->label_buf + len, s + len, n - len + 1); |
---|
1402 | |
---|
1403 | return !ferror(pimg->fh); |
---|
1404 | } |
---|
1405 | |
---|
1406 | void |
---|
1407 | img_write_item(img *pimg, int code, int flags, const char *s, |
---|
1408 | double x, double y, double z) |
---|
1409 | { |
---|
1410 | if (!pimg) return; |
---|
1411 | if (pimg->version == 3) { |
---|
1412 | int opt = 0; |
---|
1413 | switch (code) { |
---|
1414 | case img_LABEL: |
---|
1415 | write_v3label(pimg, 0x40 | flags, s); |
---|
1416 | opt = 0; |
---|
1417 | break; |
---|
1418 | case img_MOVE: |
---|
1419 | opt = 15; |
---|
1420 | break; |
---|
1421 | case img_LINE: |
---|
1422 | write_v3label(pimg, 0x80 | flags, s ? s : ""); |
---|
1423 | opt = 0; |
---|
1424 | break; |
---|
1425 | default: /* ignore for now */ |
---|
1426 | return; |
---|
1427 | } |
---|
1428 | if (opt) putc(opt, pimg->fh); |
---|
1429 | /* Output in cm */ |
---|
1430 | put32((INT32_T)my_round(x * 100.0), pimg->fh); |
---|
1431 | put32((INT32_T)my_round(y * 100.0), pimg->fh); |
---|
1432 | put32((INT32_T)my_round(z * 100.0), pimg->fh); |
---|
1433 | } else { |
---|
1434 | size_t len; |
---|
1435 | INT32_T opt = 0; |
---|
1436 | SVX_ASSERT(pimg->version > 0); |
---|
1437 | switch (code) { |
---|
1438 | case img_LABEL: |
---|
1439 | if (pimg->version == 1) { |
---|
1440 | /* put a move before each label */ |
---|
1441 | img_write_item(pimg, img_MOVE, 0, NULL, x, y, z); |
---|
1442 | put32(2, pimg->fh); |
---|
1443 | fputsnl(s, pimg->fh); |
---|
1444 | return; |
---|
1445 | } |
---|
1446 | len = strlen(s); |
---|
1447 | if (len > 255 || strchr(s, '\n')) { |
---|
1448 | /* long label - not in early incarnations of v2 format, but few |
---|
1449 | * 3d files will need these, so better not to force incompatibility |
---|
1450 | * with a new version I think... */ |
---|
1451 | putc(7, pimg->fh); |
---|
1452 | putc(flags, pimg->fh); |
---|
1453 | put32(len, pimg->fh); |
---|
1454 | fputs(s, pimg->fh); |
---|
1455 | } else { |
---|
1456 | putc(0x40 | (flags & 0x3f), pimg->fh); |
---|
1457 | fputsnl(s, pimg->fh); |
---|
1458 | } |
---|
1459 | opt = 0; |
---|
1460 | break; |
---|
1461 | case img_MOVE: |
---|
1462 | opt = 4; |
---|
1463 | break; |
---|
1464 | case img_LINE: |
---|
1465 | if (pimg->version > 1) { |
---|
1466 | opt = 0x80 | (flags & 0x3f); |
---|
1467 | break; |
---|
1468 | } |
---|
1469 | opt = 5; |
---|
1470 | break; |
---|
1471 | default: /* ignore for now */ |
---|
1472 | return; |
---|
1473 | } |
---|
1474 | if (pimg->version == 1) { |
---|
1475 | put32(opt, pimg->fh); |
---|
1476 | } else { |
---|
1477 | if (opt) putc(opt, pimg->fh); |
---|
1478 | } |
---|
1479 | /* Output in cm */ |
---|
1480 | put32((INT32_T)my_round(x * 100.0), pimg->fh); |
---|
1481 | put32((INT32_T)my_round(y * 100.0), pimg->fh); |
---|
1482 | put32((INT32_T)my_round(z * 100.0), pimg->fh); |
---|
1483 | } |
---|
1484 | } |
---|
1485 | |
---|
1486 | int |
---|
1487 | img_close(img *pimg) |
---|
1488 | { |
---|
1489 | int result = 1; |
---|
1490 | if (pimg) { |
---|
1491 | if (pimg->fh) { |
---|
1492 | if (pimg->fRead) { |
---|
1493 | osfree(pimg->survey); |
---|
1494 | osfree(pimg->title); |
---|
1495 | osfree(pimg->datestamp); |
---|
1496 | } else { |
---|
1497 | /* write end of data marker */ |
---|
1498 | switch (pimg->version) { |
---|
1499 | case 1: |
---|
1500 | put32((INT32_T)-1, pimg->fh); |
---|
1501 | break; |
---|
1502 | case 2: |
---|
1503 | putc(0, pimg->fh); |
---|
1504 | break; |
---|
1505 | case 3: |
---|
1506 | if (pimg->label_len) putc(0, pimg->fh); |
---|
1507 | putc(0, pimg->fh); |
---|
1508 | break; |
---|
1509 | } |
---|
1510 | } |
---|
1511 | if (ferror(pimg->fh)) result = 0; |
---|
1512 | if (fclose(pimg->fh)) result = 0; |
---|
1513 | if (!result) img_errno = pimg->fRead ? IMG_READERROR : IMG_WRITEERROR; |
---|
1514 | } |
---|
1515 | osfree(pimg->label_buf); |
---|
1516 | osfree(pimg); |
---|
1517 | } |
---|
1518 | return result; |
---|
1519 | } |
---|