[421b7d2] | 1 | /* img.h |
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[d1b1380] | 2 | * Header file for routines to read and write Survex ".3d" image files |
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[4f70ebc] | 3 | * Copyright (C) Olly Betts 1993,1994,1997,2001,2002,2003,2004,2005,2006,2010,2011,2012,2013,2014 |
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[846746e] | 4 | * |
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[89231c4] | 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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[846746e] | 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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[89231c4] | 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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[846746e] | 14 | * |
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[89231c4] | 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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[d7d7fa7] | 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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[d1b1380] | 18 | */ |
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| 19 | |
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| 20 | #ifndef IMG_H |
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| 21 | # define IMG_H |
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| 22 | |
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[1ee204e] | 23 | /* Define IMG_API_VERSION if you want more recent versions of the img API. |
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| 24 | * |
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| 25 | * 0 (default) The old API. date1 and date2 give the survey date as time_t. |
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| 26 | * Set to 0 for "unknown". |
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| 27 | * 1 days1 and days2 give survey dates as days since 1st Jan 1900. |
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| 28 | * Set to -1 for "unknown". |
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| 29 | */ |
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| 30 | #ifndef IMG_API_VERSION |
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| 31 | # define IMG_API_VERSION 0 |
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| 32 | #elif IMG_API_VERSION > 1 |
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| 33 | # error IMG_API_VERSION > 1 too new |
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| 34 | #endif |
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| 35 | |
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[8df22e9] | 36 | #ifdef __cplusplus |
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[f2daf3b] | 37 | extern "C" { |
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| 38 | #endif |
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| 39 | |
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[0d2b588] | 40 | #include <stdio.h> |
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[dfb7670] | 41 | #include <time.h> /* for time_t */ |
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[0d2b588] | 42 | |
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[d1b1380] | 43 | # define img_BAD -2 |
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| 44 | # define img_STOP -1 |
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| 45 | # define img_MOVE 0 |
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| 46 | # define img_LINE 1 |
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[437caf3] | 47 | /* NB: img_CROSS is never output and ignored on input. |
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[0ff23cb] | 48 | * Put crosses where labels are. */ |
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| 49 | /* # define img_CROSS 2 */ |
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[d1b1380] | 50 | # define img_LABEL 3 |
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[ee05463] | 51 | # define img_XSECT 4 |
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[d7d7fa7] | 52 | # define img_XSECT_END 5 |
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[5dc3775] | 53 | /* Loop closure information for the *preceeding* traverse (img_MOVE + one or |
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| 54 | * more img_LINEs). */ |
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[c61aa79] | 55 | # define img_ERROR_INFO 6 |
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[5c3c61a] | 56 | |
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[ab42a9c] | 57 | /* Leg flags */ |
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[5c3c61a] | 58 | # define img_FLAG_SURFACE 0x01 |
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| 59 | # define img_FLAG_DUPLICATE 0x02 |
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[95c3272] | 60 | # define img_FLAG_SPLAY 0x04 |
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[d1b1380] | 61 | |
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[ab42a9c] | 62 | /* Station flags */ |
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[5cb0e72] | 63 | # define img_SFLAG_SURFACE 0x01 |
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| 64 | # define img_SFLAG_UNDERGROUND 0x02 |
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[dfb4240] | 65 | # define img_SFLAG_ENTRANCE 0x04 |
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| 66 | # define img_SFLAG_EXPORTED 0x08 |
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| 67 | # define img_SFLAG_FIXED 0x10 |
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[a2c33ae] | 68 | # define img_SFLAG_ANON 0x20 |
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[dcbcae0] | 69 | # define img_SFLAG_WALL 0x40 |
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[5cb0e72] | 70 | |
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[0c50ce3] | 71 | /* File-wide flags */ |
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| 72 | # define img_FFLAG_EXTENDED 0x80 |
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| 73 | |
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[8490ad9] | 74 | /* When writing img_XSECT, img_XFLAG_END in pimg->flags means this is the last |
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| 75 | * img_XSECT in this tube: |
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| 76 | */ |
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[ee05463] | 77 | # define img_XFLAG_END 0x01 |
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| 78 | |
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[eb5aea0] | 79 | # define img_STYLE_UNKNOWN -1 |
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| 80 | # define img_STYLE_NORMAL 0 |
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| 81 | # define img_STYLE_DIVING 1 |
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| 82 | # define img_STYLE_CARTESIAN 2 |
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| 83 | # define img_STYLE_CYLPOLAR 3 |
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[ac28f4f] | 84 | # define img_STYLE_NOSURVEY 4 |
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[eb5aea0] | 85 | |
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[be97baf] | 86 | /* 3D coordinates (in metres) */ |
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[0ed0e16] | 87 | typedef struct { |
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[a9f5117] | 88 | double x, y, z; |
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[0ed0e16] | 89 | } img_point; |
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[421b7d2] | 90 | |
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[d1b1380] | 91 | typedef struct { |
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[6f6356c4] | 92 | /* members you can access when reading (don't touch when writing) */ |
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[23f7ea7] | 93 | char *label; |
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[5c3c61a] | 94 | int flags; |
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[a2ad284] | 95 | char *title; |
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[43d63e57] | 96 | /* If the coordinate system was specified, this contains a PROJ4 string |
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| 97 | * describing it. If not, this member will be NULL. |
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| 98 | */ |
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| 99 | char *cs; |
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[ec812baa] | 100 | /* Older .3d format versions stored a human readable datestamp string. |
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| 101 | * Format versions >= 8 versions store a string consisting of "@" followed |
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| 102 | * by the number of seconds since midnight UTC on 1/1/1970. Some foreign |
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| 103 | * formats contain a human readable string, others no date information |
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| 104 | * (which results in "?" being returned). |
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[42bd3576] | 105 | */ |
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[a2ad284] | 106 | char *datestamp; |
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[4f70ebc] | 107 | /* The datestamp as a time_t (or (time_t)-1 if not available). |
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| 108 | * |
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| 109 | * For 3d format versions >= 8, this is a reliable value and in UTC. Older |
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| 110 | * 3d format versions store a human readable time, which img will attempt |
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| 111 | * to decode, but it may fail, particularly with handling timezones. Even |
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| 112 | * if it does work, beware that times in local time where DST applies are |
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| 113 | * inherently ambiguous around when the clocks go back. |
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| 114 | * |
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| 115 | * CMAP XYZ files contain a timestamp. It's probably in localtime (but |
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| 116 | * without any timezone information) and the example files are all pre-2000 |
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| 117 | * and have two digit years. We do our best to turn these into a useful |
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| 118 | * time_t value. |
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| 119 | */ |
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| 120 | time_t datestamp_numeric; |
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[eef68f9] | 121 | char separator; /* character used to separate survey levels ('.' usually) */ |
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[1ee204e] | 122 | #if IMG_API_VERSION == 0 |
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[b5a3219] | 123 | time_t date1, date2; |
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[1ee204e] | 124 | #else /* IMG_API_VERSION == 1 */ |
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| 125 | int days1, days2; |
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| 126 | #endif |
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[ee7af72] | 127 | double l, r, u, d; |
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[5dc3775] | 128 | /* Error information - valid when img_ERROR_INFO is returned: */ |
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[c61aa79] | 129 | int n_legs; |
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| 130 | double length; |
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| 131 | double E, H, V; |
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| 132 | /* The filename actually opened (e.g. may have ".3d" added). */ |
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| 133 | char * filename_opened; |
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[eef68f9] | 134 | int is_extended_elevation; |
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[eb5aea0] | 135 | /* The style of the data - one of the img_STYLE_* constants above */ |
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| 136 | int style; |
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| 137 | |
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[5c3c61a] | 138 | /* all other members are for internal use only */ |
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[a420b49] | 139 | FILE *fh; /* file handle of image file */ |
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[0ff23cb] | 140 | char *label_buf; |
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[23f7ea7] | 141 | size_t buf_len; |
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[d69255f] | 142 | size_t label_len; |
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[1fad6d4] | 143 | int fRead; /* 1 for reading, 0 for writing */ |
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[f2588ca] | 144 | long start; |
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[0da6e60] | 145 | /* version of file format: |
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[f1c7c9c7] | 146 | * -4 => CMAP .xyz file, shot format |
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| 147 | * -3 => CMAP .xyz file, station format |
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[ad4eaf3f] | 148 | * -2 => Compass .plt file |
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[0da6e60] | 149 | * -1 => .pos file |
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| 150 | * 0 => 0.01 ascii |
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| 151 | * 1 => 0.01 binary, |
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| 152 | * 2 => byte actions and flags |
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[ad4eaf3f] | 153 | * 3 => prefixes for legs; compressed prefixes |
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[b5a3219] | 154 | * 4 => survey date |
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[f4c5932] | 155 | * 5 => LRUD info |
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[c61aa79] | 156 | * 6 => error info |
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[1ee204e] | 157 | * 7 => more compact dates with wider range |
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[ec812baa] | 158 | * 8 => lots of changes |
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[0da6e60] | 159 | */ |
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[5c3c61a] | 160 | int version; |
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[76bbb7c9] | 161 | char *survey; |
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| 162 | size_t survey_len; |
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| 163 | int pending; /* for old style text format files and survey filtering */ |
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| 164 | img_point mv; |
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[1ee204e] | 165 | #if IMG_API_VERSION == 0 |
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[ee05463] | 166 | time_t olddate1, olddate2; |
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[1ee204e] | 167 | #else /* IMG_API_VERSION == 1 */ |
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| 168 | int olddays1, olddays2; |
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| 169 | #endif |
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[eb5aea0] | 170 | int oldstyle; |
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[d1b1380] | 171 | } img; |
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| 172 | |
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[5c3c61a] | 173 | /* Which version of the file format to output (defaults to newest) */ |
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| 174 | extern unsigned int img_output_version; |
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| 175 | |
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[2bb17c9] | 176 | /* Minimum supported value for img_output_version: */ |
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| 177 | #define IMG_VERSION_MIN 1 |
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| 178 | |
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| 179 | /* Maximum supported value for img_output_version: */ |
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[ec812baa] | 180 | #define IMG_VERSION_MAX 8 |
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[2bb17c9] | 181 | |
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[0ed0e16] | 182 | /* Open a .3d file for reading |
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[d1b1380] | 183 | * fnm is the filename |
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| 184 | * Returns pointer to an img struct or NULL |
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| 185 | */ |
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[a2ad284] | 186 | #define img_open(F) img_open_survey((F), NULL) |
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[76bbb7c9] | 187 | |
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| 188 | /* Open a .3d file for reading |
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| 189 | * fnm is the filename |
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| 190 | * Returns pointer to an img struct or NULL |
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| 191 | * survey points to a survey name to restrict reading to (or NULL for all |
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| 192 | * survey data in the file) |
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| 193 | */ |
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[a2ad284] | 194 | img *img_open_survey(const char *fnm, const char *survey); |
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[d1b1380] | 195 | |
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| 196 | /* Open a .3d file for output |
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| 197 | * fnm is the filename |
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[0c50ce3] | 198 | * title is the title |
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| 199 | * flags contains a bitwise-or of any file-wide flags - currently only one |
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| 200 | * is available: img_FFLAG_EXTENDED. (The third parameter used to be |
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| 201 | * 'fBinary', but has been ignored for many years, so the parameter has |
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| 202 | * been repurposed for flags - for this reason, img.c deliberately ignores bit |
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| 203 | * 1 being set, but callers should be written/updated not to set it). |
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| 204 | * |
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[ad9a5cd] | 205 | * Returns pointer to an img struct or NULL for error (check img_error() |
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| 206 | * for details) |
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[d1b1380] | 207 | */ |
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[43d63e57] | 208 | #define img_open_write(F, T, S) img_open_write_cs(F, T, NULL, S) |
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| 209 | |
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| 210 | /* Open a .3d file for output in a specified coordinate system |
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| 211 | * fnm is the filename |
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| 212 | * title is the title |
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| 213 | * cs is a PROJ4 string describing the coordinate system (or NULL) |
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| 214 | * flags contains a bitwise-or of any file-wide flags - currently only one |
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| 215 | * is available: img_FFLAG_EXTENDED. |
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| 216 | * |
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| 217 | * Returns pointer to an img struct or NULL for error (check img_error() |
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| 218 | * for details) |
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| 219 | */ |
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| 220 | img *img_open_write_cs(const char *fnm, const char *title, const char * cs, |
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| 221 | int flags); |
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[d1b1380] | 222 | |
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[0ed0e16] | 223 | /* Read an item from a .3d file |
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[d1b1380] | 224 | * pimg is a pointer to an img struct returned by img_open() |
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[0ed0e16] | 225 | * coordinates are returned in p |
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[23f7ea7] | 226 | * flags and label name are returned in fields in pimg |
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[d1b1380] | 227 | * Returns img_XXXX as #define-d above |
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| 228 | */ |
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[23f7ea7] | 229 | int img_read_item(img *pimg, img_point *p); |
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[d1b1380] | 230 | |
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[0ed0e16] | 231 | /* Write a item to a .3d file |
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[d1b1380] | 232 | * pimg is a pointer to an img struct returned by img_open_write() |
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| 233 | * code is one of the img_XXXX #define-d above |
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[ee05463] | 234 | * flags is the leg, station, or xsect flags |
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| 235 | * (meaningful for img_LINE, img_LABEL, and img_XSECT respectively) |
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[95c3272] | 236 | * s is the label (only meaningful for img_LABEL) |
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[0ed0e16] | 237 | * x, y, z are the coordinates |
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[d1b1380] | 238 | */ |
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[95c3272] | 239 | void img_write_item(img *pimg, int code, int flags, const char *s, |
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[a9f5117] | 240 | double x, double y, double z); |
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[f2588ca] | 241 | |
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[c61aa79] | 242 | /* Write error information for the current traverse |
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| 243 | * n_legs is the number of legs in the traverse |
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| 244 | * length is the traverse length (in m) |
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| 245 | * E is the ratio of the observed misclosure to the theoretical one |
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| 246 | * H is the ratio of the observed horizontal misclosure to the theoretical one |
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| 247 | * V is the ratio of the observed vertical misclosure to the theoretical one |
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| 248 | */ |
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| 249 | void img_write_errors(img *pimg, int n_legs, double length, |
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| 250 | double E, double H, double V); |
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| 251 | |
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[f2588ca] | 252 | /* rewind a .3d file opened for reading so the data can be read in |
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| 253 | * several passes |
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| 254 | * pimg is a pointer to an img struct returned by img_open() |
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[9f3e5df] | 255 | * Returns: non-zero for success, zero for error (check img_error() for |
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| 256 | * details) |
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[f2588ca] | 257 | */ |
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[9f3e5df] | 258 | int img_rewind(img *pimg); |
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[f2588ca] | 259 | |
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[d1b1380] | 260 | /* Close a .3d file |
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| 261 | * pimg is a pointer to an img struct returned by img_open() or |
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| 262 | * img_open_write() |
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[ad9a5cd] | 263 | * Returns: non-zero for success, zero for error (check img_error() for |
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| 264 | * details) |
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[d1b1380] | 265 | */ |
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[ad9a5cd] | 266 | int img_close(img *pimg); |
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[d1b1380] | 267 | |
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| 268 | /* Codes returned by img_error */ |
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[a420b49] | 269 | typedef enum { |
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| 270 | IMG_NONE = 0, IMG_FILENOTFOUND, IMG_OUTOFMEMORY, |
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[ad9a5cd] | 271 | IMG_CANTOPENOUT, IMG_BADFORMAT, IMG_DIRECTORY, |
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[6c1c4f3] | 272 | IMG_READERROR, IMG_WRITEERROR, IMG_TOONEW |
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[a420b49] | 273 | } img_errcode; |
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[d1b1380] | 274 | |
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| 275 | /* Read the error code |
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[a405bc1] | 276 | * If img_open(), img_open_survey() or img_open_write() returns NULL, or |
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| 277 | * img_rewind() or img_close() returns 0, or img_read_item() returns img_BAD |
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| 278 | * then you can call this function to discover why. |
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| 279 | */ |
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[a420b49] | 280 | img_errcode img_error(void); |
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[d1b1380] | 281 | |
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[8df22e9] | 282 | #ifdef __cplusplus |
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[f2daf3b] | 283 | } |
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| 284 | #endif |
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| 285 | |
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[d1b1380] | 286 | #endif |
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