1 | /* readval.c |
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2 | * Routines to read a prefix or number from the current input file |
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3 | * Copyright (C) 1991-2003,2005,2006,2010,2011,2012,2013,2014,2015 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 <limits.h> |
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25 | #include <stddef.h> /* for offsetof */ |
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26 | |
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27 | #include "cavern.h" |
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28 | #include "date.h" |
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29 | #include "debug.h" |
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30 | #include "filename.h" |
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31 | #include "message.h" |
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32 | #include "readval.h" |
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33 | #include "datain.h" |
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34 | #include "netbits.h" |
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35 | #include "osalloc.h" |
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36 | #include "str.h" |
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37 | |
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38 | #ifdef HAVE_SETJMP_H |
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39 | # define LONGJMP(JB) longjmp((JB), 1) |
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40 | #else |
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41 | # define LONGJMP(JB) exit(1) |
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42 | #endif |
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43 | |
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44 | int root_depr_count = 0; |
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45 | |
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46 | static prefix * |
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47 | new_anon_station(void) |
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48 | { |
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49 | prefix *name = osnew(prefix); |
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50 | name->pos = NULL; |
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51 | name->ident = NULL; |
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52 | name->shape = 0; |
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53 | name->stn = NULL; |
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54 | name->up = pcs->Prefix; |
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55 | name->down = NULL; |
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56 | name->filename = file.filename; |
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57 | name->line = file.line; |
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58 | if (TSTBIT(pcs->infer, INFER_EXPORTS)) { |
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59 | name->min_export = USHRT_MAX; |
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60 | } else { |
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61 | name->min_export = 0; |
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62 | } |
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63 | name->max_export = 0; |
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64 | name->sflags = BIT(SFLAGS_ANON); |
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65 | /* Keep linked list of anon stations for node stats. */ |
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66 | name->right = anon_list; |
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67 | anon_list = name; |
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68 | return name; |
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69 | } |
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70 | |
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71 | /* if prefix is omitted: if PFX_OPT set return NULL, otherwise use longjmp */ |
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72 | extern prefix * |
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73 | read_prefix(unsigned pfx_flags) |
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74 | { |
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75 | bool f_optional = !!(pfx_flags & PFX_OPT); |
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76 | bool fSurvey = !!(pfx_flags & PFX_SURVEY); |
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77 | bool fSuspectTypo = !!(pfx_flags & PFX_SUSPECT_TYPO); |
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78 | prefix *back_ptr, *ptr; |
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79 | char *name; |
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80 | size_t name_len = 32; |
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81 | size_t i; |
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82 | bool fNew; |
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83 | bool fImplicitPrefix = fTrue; |
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84 | int depth = -1; |
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85 | |
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86 | skipblanks(); |
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87 | #ifndef NO_DEPRECATED |
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88 | if (isRoot(ch)) { |
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89 | if (!(pfx_flags & PFX_ALLOW_ROOT)) { |
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90 | compile_error(-/*ROOT is deprecated*/25); |
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91 | LONGJMP(file.jbSkipLine); |
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92 | } |
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93 | if (root_depr_count < 5) { |
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94 | compile_warning(-/*ROOT is deprecated*/25); |
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95 | if (++root_depr_count == 5) |
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96 | compile_warning(/*Further uses of this deprecated feature will not be reported*/95); |
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97 | } |
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98 | nextch(); |
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99 | ptr = root; |
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100 | if (!isNames(ch)) { |
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101 | if (!isSep(ch)) return ptr; |
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102 | /* Allow optional SEPARATOR after ROOT */ |
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103 | nextch(); |
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104 | } |
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105 | fImplicitPrefix = fFalse; |
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106 | #else |
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107 | if (0) { |
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108 | #endif |
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109 | } else { |
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110 | if ((pfx_flags & PFX_ANON) && |
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111 | (isSep(ch) || (pcs->dash_for_anon_wall_station && ch == '-'))) { |
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112 | int first_ch = ch; |
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113 | filepos here; |
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114 | get_pos(&here); |
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115 | nextch(); |
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116 | if (isBlank(ch) || isEol(ch)) { |
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117 | if (!isSep(first_ch)) |
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118 | goto anon_wall_station; |
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119 | /* A single separator alone ('.' by default) is an anonymous |
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120 | * station which is on a point inside the passage and implies |
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121 | * the leg to it is a splay. |
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122 | */ |
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123 | if (TSTBIT(pcs->flags, FLAGS_ANON_ONE_END)) { |
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124 | compile_error(-/*Can't have a leg between two anonymous stations*/3); |
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125 | LONGJMP(file.jbSkipLine); |
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126 | } |
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127 | pcs->flags |= BIT(FLAGS_ANON_ONE_END) | BIT(FLAGS_IMPLICIT_SPLAY); |
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128 | return new_anon_station(); |
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129 | } |
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130 | if (isSep(first_ch) && ch == first_ch) { |
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131 | nextch(); |
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132 | if (isBlank(ch) || isEol(ch)) { |
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133 | /* A double separator ('..' by default) is an anonymous station |
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134 | * which is on the wall and implies the leg to it is a splay. |
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135 | */ |
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136 | prefix * pfx; |
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137 | anon_wall_station: |
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138 | if (TSTBIT(pcs->flags, FLAGS_ANON_ONE_END)) { |
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139 | compile_error(-/*Can't have a leg between two anonymous stations*/3); |
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140 | LONGJMP(file.jbSkipLine); |
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141 | } |
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142 | pcs->flags |= BIT(FLAGS_ANON_ONE_END) | BIT(FLAGS_IMPLICIT_SPLAY); |
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143 | pfx = new_anon_station(); |
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144 | pfx->sflags |= BIT(SFLAGS_WALL); |
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145 | return pfx; |
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146 | } |
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147 | if (ch == first_ch) { |
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148 | nextch(); |
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149 | if (isBlank(ch) || isEol(ch)) { |
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150 | /* A triple separator ('...' by default) is an anonymous |
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151 | * station, but otherwise not handled specially (e.g. for |
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152 | * a single leg down an unexplored side passage to a station |
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153 | * which isn't refindable). |
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154 | */ |
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155 | if (TSTBIT(pcs->flags, FLAGS_ANON_ONE_END)) { |
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156 | compile_error(-/*Can't have a leg between two anonymous stations*/3); |
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157 | LONGJMP(file.jbSkipLine); |
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158 | } |
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159 | pcs->flags |= BIT(FLAGS_ANON_ONE_END); |
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160 | return new_anon_station(); |
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161 | } |
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162 | } |
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163 | } |
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164 | set_pos(&here); |
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165 | } |
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166 | ptr = pcs->Prefix; |
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167 | } |
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168 | |
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169 | i = 0; |
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170 | name = NULL; |
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171 | do { |
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172 | fNew = fFalse; |
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173 | if (name == NULL) { |
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174 | /* Need a new name buffer */ |
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175 | name = osmalloc(name_len); |
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176 | } |
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177 | /* i==0 iff this is the first pass */ |
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178 | if (i) { |
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179 | i = 0; |
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180 | nextch(); |
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181 | } |
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182 | while (isNames(ch)) { |
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183 | if (i < pcs->Truncate) { |
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184 | /* truncate name */ |
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185 | name[i++] = (pcs->Case == LOWER ? tolower(ch) : |
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186 | (pcs->Case == OFF ? ch : toupper(ch))); |
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187 | if (i >= name_len) { |
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188 | name_len = name_len + name_len; |
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189 | name = osrealloc(name, name_len); |
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190 | } |
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191 | } |
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192 | nextch(); |
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193 | } |
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194 | if (isSep(ch)) fImplicitPrefix = fFalse; |
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195 | if (i == 0) { |
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196 | osfree(name); |
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197 | if (!f_optional) { |
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198 | if (isEol(ch)) { |
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199 | if (fSurvey) { |
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200 | compile_error(-/*Expecting survey name*/89); |
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201 | } else { |
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202 | compile_error(-/*Expecting station name*/28); |
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203 | } |
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204 | } else { |
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205 | /* TRANSLATORS: Here "station" is a survey station, not a train station. */ |
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206 | compile_error(-/*Character “%c” not allowed in station name (use *SET NAMES to set allowed characters)*/7, ch); |
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207 | } |
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208 | LONGJMP(file.jbSkipLine); |
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209 | } |
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210 | return (prefix *)NULL; |
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211 | } |
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212 | |
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213 | name[i++] = '\0'; |
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214 | |
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215 | back_ptr = ptr; |
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216 | ptr = ptr->down; |
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217 | if (ptr == NULL) { |
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218 | /* Special case first time around at each level */ |
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219 | name = osrealloc(name, i); |
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220 | ptr = osnew(prefix); |
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221 | ptr->ident = name; |
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222 | name = NULL; |
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223 | ptr->right = ptr->down = NULL; |
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224 | ptr->pos = NULL; |
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225 | ptr->shape = 0; |
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226 | ptr->stn = NULL; |
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227 | ptr->up = back_ptr; |
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228 | ptr->filename = file.filename; |
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229 | ptr->line = file.line; |
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230 | ptr->min_export = ptr->max_export = 0; |
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231 | ptr->sflags = BIT(SFLAGS_SURVEY); |
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232 | if (fSuspectTypo && !fImplicitPrefix) |
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233 | ptr->sflags |= BIT(SFLAGS_SUSPECTTYPO); |
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234 | back_ptr->down = ptr; |
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235 | fNew = fTrue; |
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236 | } else { |
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237 | /* Use caching to speed up adding an increasing sequence to a |
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238 | * large survey */ |
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239 | static prefix *cached_survey = NULL, *cached_station = NULL; |
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240 | prefix *ptrPrev = NULL; |
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241 | int cmp = 1; /* result of strcmp ( -ve for <, 0 for =, +ve for > ) */ |
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242 | if (cached_survey == back_ptr) { |
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243 | cmp = strcmp(cached_station->ident, name); |
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244 | if (cmp <= 0) ptr = cached_station; |
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245 | } |
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246 | while (ptr && (cmp = strcmp(ptr->ident, name))<0) { |
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247 | ptrPrev = ptr; |
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248 | ptr = ptr->right; |
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249 | } |
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250 | if (cmp) { |
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251 | /* ie we got to one that was higher, or the end */ |
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252 | prefix *newptr; |
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253 | name = osrealloc(name, i); |
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254 | newptr = osnew(prefix); |
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255 | newptr->ident = name; |
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256 | name = NULL; |
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257 | if (ptrPrev == NULL) |
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258 | back_ptr->down = newptr; |
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259 | else |
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260 | ptrPrev->right = newptr; |
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261 | newptr->right = ptr; |
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262 | newptr->down = NULL; |
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263 | newptr->pos = NULL; |
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264 | newptr->shape = 0; |
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265 | newptr->stn = NULL; |
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266 | newptr->up = back_ptr; |
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267 | newptr->filename = file.filename; |
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268 | newptr->line = file.line; |
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269 | newptr->min_export = newptr->max_export = 0; |
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270 | newptr->sflags = BIT(SFLAGS_SURVEY); |
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271 | if (fSuspectTypo && !fImplicitPrefix) |
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272 | newptr->sflags |= BIT(SFLAGS_SUSPECTTYPO); |
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273 | ptr = newptr; |
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274 | fNew = fTrue; |
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275 | } |
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276 | cached_survey = back_ptr; |
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277 | cached_station = ptr; |
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278 | } |
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279 | depth++; |
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280 | f_optional = fFalse; /* disallow after first level */ |
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281 | } while (isSep(ch)); |
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282 | if (name) osfree(name); |
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283 | |
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284 | /* don't warn about a station that is referred to twice */ |
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285 | if (!fNew) ptr->sflags &= ~BIT(SFLAGS_SUSPECTTYPO); |
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286 | |
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287 | if (fNew) { |
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288 | /* fNew means SFLAGS_SURVEY is currently set */ |
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289 | SVX_ASSERT(TSTBIT(ptr->sflags, SFLAGS_SURVEY)); |
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290 | if (!fSurvey) { |
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291 | ptr->sflags &= ~BIT(SFLAGS_SURVEY); |
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292 | if (TSTBIT(pcs->infer, INFER_EXPORTS)) ptr->min_export = USHRT_MAX; |
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293 | } |
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294 | } else { |
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295 | /* check that the same name isn't being used for a survey and station */ |
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296 | if (fSurvey ^ TSTBIT(ptr->sflags, SFLAGS_SURVEY)) { |
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297 | /* TRANSLATORS: Here "station" is a survey station, not a train station. |
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298 | * |
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299 | * Here "survey" is a "cave map" rather than list of questions - it should be |
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300 | * translated to the terminology that cavers using the language would use. |
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301 | */ |
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302 | compile_error(/*“%s” can’t be both a station and a survey*/27, |
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303 | sprint_prefix(ptr)); |
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304 | } |
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305 | if (!fSurvey && TSTBIT(pcs->infer, INFER_EXPORTS)) ptr->min_export = USHRT_MAX; |
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306 | } |
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307 | |
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308 | /* check the export level */ |
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309 | #if 0 |
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310 | printf("R min %d max %d depth %d pfx %s\n", |
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311 | ptr->min_export, ptr->max_export, depth, sprint_prefix(ptr)); |
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312 | #endif |
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313 | if (ptr->min_export == 0 || ptr->min_export == USHRT_MAX) { |
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314 | if (depth > ptr->max_export) ptr->max_export = depth; |
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315 | } else if (ptr->max_export < depth) { |
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316 | prefix *survey = ptr; |
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317 | char *s; |
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318 | const char *p; |
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319 | int level; |
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320 | for (level = ptr->max_export + 1; level; level--) { |
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321 | survey = survey->up; |
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322 | SVX_ASSERT(survey); |
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323 | } |
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324 | s = osstrdup(sprint_prefix(survey)); |
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325 | p = sprint_prefix(ptr); |
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326 | if (survey->filename) { |
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327 | compile_error_pfx(survey, |
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328 | /*Station “%s” not exported from survey “%s”*/26, |
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329 | p, s); |
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330 | } else { |
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331 | compile_error(/*Station “%s” not exported from survey “%s”*/26, p, s); |
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332 | } |
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333 | osfree(s); |
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334 | #if 0 |
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335 | printf(" *** pfx %s warning not exported enough depth %d " |
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336 | "ptr->max_export %d\n", sprint_prefix(ptr), |
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337 | depth, ptr->max_export); |
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338 | #endif |
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339 | } |
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340 | if (!fImplicitPrefix && (pfx_flags & PFX_WARN_SEPARATOR)) { |
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341 | compile_warning(/*Separator in survey name*/392); |
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342 | } |
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343 | return ptr; |
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344 | } |
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345 | |
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346 | /* if numeric expr is omitted: if f_optional return HUGE_REAL, else longjmp */ |
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347 | static real |
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348 | read_number(bool f_optional) |
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349 | { |
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350 | bool fPositive, fDigits = fFalse; |
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351 | real n = (real)0.0; |
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352 | filepos fp; |
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353 | int ch_old; |
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354 | |
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355 | get_pos(&fp); |
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356 | ch_old = ch; |
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357 | fPositive = !isMinus(ch); |
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358 | if (isSign(ch)) nextch(); |
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359 | |
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360 | while (isdigit(ch)) { |
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361 | n = n * (real)10.0 + (char)(ch - '0'); |
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362 | nextch(); |
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363 | fDigits = fTrue; |
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364 | } |
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365 | |
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366 | if (isDecimal(ch)) { |
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367 | real mult = (real)1.0; |
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368 | nextch(); |
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369 | while (isdigit(ch)) { |
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370 | mult *= (real).1; |
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371 | n += (char)(ch - '0') * mult; |
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372 | fDigits = fTrue; |
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373 | nextch(); |
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374 | } |
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375 | } |
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376 | |
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377 | /* !'fRead' => !fDigits so fDigits => 'fRead' */ |
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378 | if (fDigits) return (fPositive ? n : -n); |
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379 | |
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380 | /* didn't read a valid number. If it's optional, reset filepos & return */ |
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381 | set_pos(&fp); |
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382 | if (f_optional) { |
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383 | return HUGE_REAL; |
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384 | } |
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385 | |
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386 | if (isOmit(ch_old)) { |
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387 | compile_error(-/*Field may not be omitted*/8); |
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388 | } else { |
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389 | compile_error_token(-/*Expecting numeric field, found “%s”*/9); |
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390 | } |
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391 | LONGJMP(file.jbSkipLine); |
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392 | return 0.0; /* for brain-fried compilers */ |
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393 | } |
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394 | |
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395 | extern real |
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396 | read_numeric(bool f_optional, int *p_n_readings) |
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397 | { |
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398 | size_t n_readings = 0; |
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399 | real tot = (real)0.0; |
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400 | |
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401 | skipblanks(); |
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402 | if (!isOpen(ch)) { |
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403 | real r = read_number(f_optional); |
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404 | if (p_n_readings) *p_n_readings = (r == HUGE_REAL ? 0 : 1); |
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405 | return r; |
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406 | } |
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407 | nextch(); |
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408 | |
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409 | skipblanks(); |
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410 | do { |
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411 | tot += read_number(fFalse); |
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412 | ++n_readings; |
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413 | skipblanks(); |
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414 | } while (!isClose(ch)); |
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415 | nextch(); |
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416 | |
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417 | if (p_n_readings) *p_n_readings = n_readings; |
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418 | /* FIXME: special averaging for bearings ... */ |
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419 | /* And for percentage gradient */ |
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420 | return tot / n_readings; |
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421 | } |
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422 | |
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423 | /* read numeric expr or omit (return HUGE_REAL); else longjmp */ |
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424 | extern real |
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425 | read_numeric_or_omit(int *p_n_readings) |
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426 | { |
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427 | real v = read_numeric(fTrue, p_n_readings); |
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428 | if (v == HUGE_REAL) { |
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429 | if (!isOmit(ch)) { |
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430 | compile_error_token(-/*Expecting numeric field, found “%s”*/9); |
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431 | LONGJMP(file.jbSkipLine); |
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432 | return 0.0; /* for brain-fried compilers */ |
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433 | } |
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434 | nextch(); |
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435 | } |
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436 | return v; |
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437 | } |
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438 | |
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439 | /* Don't skip blanks, variable error code */ |
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440 | static unsigned int |
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441 | read_uint_internal(int errmsg, const filepos *fp) |
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442 | { |
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443 | unsigned int n = 0; |
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444 | if (!isdigit(ch)) { |
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445 | if (fp) set_pos(fp); |
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446 | compile_error_token(-errmsg); |
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447 | LONGJMP(file.jbSkipLine); |
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448 | } |
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449 | while (isdigit(ch)) { |
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450 | n = n * 10 + (char)(ch - '0'); |
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451 | nextch(); |
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452 | } |
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453 | return n; |
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454 | } |
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455 | |
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456 | extern unsigned int |
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457 | read_uint(void) |
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458 | { |
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459 | skipblanks(); |
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460 | return read_uint_internal(/*Expecting numeric field, found “%s”*/9, NULL); |
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461 | } |
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462 | |
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463 | extern void |
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464 | read_string(char **pstr, int *plen) |
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465 | { |
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466 | s_zero(pstr); |
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467 | |
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468 | skipblanks(); |
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469 | if (ch == '\"') { |
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470 | /* String quoted in "" */ |
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471 | nextch(); |
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472 | while (1) { |
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473 | if (isEol(ch)) { |
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474 | compile_error(-/*Missing \"*/69); |
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475 | LONGJMP(file.jbSkipLine); |
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476 | } |
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477 | |
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478 | if (ch == '\"') break; |
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479 | |
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480 | s_catchar(pstr, plen, ch); |
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481 | nextch(); |
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482 | } |
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483 | nextch(); |
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484 | } else { |
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485 | /* Unquoted string */ |
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486 | while (1) { |
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487 | if (isEol(ch) || isComm(ch)) { |
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488 | if (!*pstr || !(*pstr)[0]) { |
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489 | compile_error(-/*Expecting string field*/121); |
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490 | LONGJMP(file.jbSkipLine); |
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491 | } |
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492 | return; |
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493 | } |
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494 | |
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495 | if (isBlank(ch)) break; |
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496 | |
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497 | s_catchar(pstr, plen, ch); |
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498 | nextch(); |
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499 | } |
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500 | } |
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501 | } |
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502 | |
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503 | extern void |
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504 | read_date(int *py, int *pm, int *pd) |
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505 | { |
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506 | int y = 0, m = 0, d = 0; |
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507 | filepos fp; |
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508 | |
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509 | skipblanks(); |
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510 | |
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511 | get_pos(&fp); |
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512 | y = read_uint_internal(/*Expecting date, found “%s”*/198, &fp); |
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513 | /* Two digit year is 19xx. */ |
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514 | if (y < 100) y += 1900; |
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515 | if (y < 1900 || y > 2078) { |
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516 | compile_warning(/*Invalid year (< 1900 or > 2078)*/58); |
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517 | LONGJMP(file.jbSkipLine); |
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518 | return; /* for brain-fried compilers */ |
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519 | } |
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520 | if (ch == '.') { |
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521 | nextch(); |
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522 | m = read_uint_internal(/*Expecting date, found “%s”*/198, &fp); |
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523 | if (m < 1 || m > 12) { |
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524 | compile_warning(/*Invalid month*/86); |
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525 | LONGJMP(file.jbSkipLine); |
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526 | return; /* for brain-fried compilers */ |
---|
527 | } |
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528 | if (ch == '.') { |
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529 | nextch(); |
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530 | d = read_uint_internal(/*Expecting date, found “%s”*/198, &fp); |
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531 | if (d < 1 || d > last_day(y, m)) { |
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532 | /* TRANSLATORS: e.g. 31st of April, or 32nd of any month */ |
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533 | compile_warning(/*Invalid day of the month*/87); |
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534 | LONGJMP(file.jbSkipLine); |
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535 | return; /* for brain-fried compilers */ |
---|
536 | } |
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537 | } |
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538 | } |
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539 | if (py) *py = y; |
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540 | if (pm) *pm = m; |
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541 | if (pd) *pd = d; |
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542 | } |
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