[421b7d2] | 1 | /* img.h |
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[942629a] | 2 | * Header file for routines to read and write processed survey data files |
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| 3 | * |
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| 4 | * These routines support reading processed survey data in a variety of formats |
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| 5 | * - currently: |
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| 6 | * |
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| 7 | * - Survex ".3d" image files |
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| 8 | * - Survex ".pos" files |
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| 9 | * - Compass Plot files (".plt" and ".plf") |
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| 10 | * - CMAP XYZ files (".sht", ".adj", ".una", ".xyz") |
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| 11 | * |
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| 12 | * Writing Survex ".3d" image files is supported. |
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| 13 | * |
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[7826201] | 14 | * Copyright (C) Olly Betts 1993,1994,1997,2001,2002,2003,2004,2005,2006,2010,2011,2012,2013,2014,2016,2018 |
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[846746e] | 15 | * |
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[89231c4] | 16 | * This program is free software; you can redistribute it and/or modify |
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| 17 | * it under the terms of the GNU General Public License as published by |
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| 18 | * the Free Software Foundation; either version 2 of the License, or |
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| 19 | * (at your option) any later version. |
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[846746e] | 20 | * |
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| 21 | * This program is distributed in the hope that it will be useful, |
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| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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[89231c4] | 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 24 | * GNU General Public License for more details. |
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[846746e] | 25 | * |
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[89231c4] | 26 | * You should have received a copy of the GNU General Public License |
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| 27 | * along with this program; if not, write to the Free Software |
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[d7d7fa7] | 28 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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[d1b1380] | 29 | */ |
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| 30 | |
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| 31 | #ifndef IMG_H |
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| 32 | # define IMG_H |
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| 33 | |
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[1ee204e] | 34 | /* Define IMG_API_VERSION if you want more recent versions of the img API. |
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| 35 | * |
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| 36 | * 0 (default) The old API. date1 and date2 give the survey date as time_t. |
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| 37 | * Set to 0 for "unknown". |
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| 38 | * 1 days1 and days2 give survey dates as days since 1st Jan 1900. |
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| 39 | * Set to -1 for "unknown". |
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| 40 | */ |
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| 41 | #ifndef IMG_API_VERSION |
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| 42 | # define IMG_API_VERSION 0 |
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| 43 | #elif IMG_API_VERSION > 1 |
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| 44 | # error IMG_API_VERSION > 1 too new |
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| 45 | #endif |
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| 46 | |
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[8df22e9] | 47 | #ifdef __cplusplus |
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[f2daf3b] | 48 | extern "C" { |
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| 49 | #endif |
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| 50 | |
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[0d2b588] | 51 | #include <stdio.h> |
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[dfb7670] | 52 | #include <time.h> /* for time_t */ |
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[0d2b588] | 53 | |
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[d1b1380] | 54 | # define img_BAD -2 |
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| 55 | # define img_STOP -1 |
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| 56 | # define img_MOVE 0 |
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| 57 | # define img_LINE 1 |
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[437caf3] | 58 | /* NB: img_CROSS is never output and ignored on input. |
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[0ff23cb] | 59 | * Put crosses where labels are. */ |
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| 60 | /* # define img_CROSS 2 */ |
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[d1b1380] | 61 | # define img_LABEL 3 |
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[ee05463] | 62 | # define img_XSECT 4 |
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[d7d7fa7] | 63 | # define img_XSECT_END 5 |
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[22753f1] | 64 | /* Loop closure information for the *preceding* traverse (img_MOVE + one or |
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[5dc3775] | 65 | * more img_LINEs). */ |
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[c61aa79] | 66 | # define img_ERROR_INFO 6 |
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[5c3c61a] | 67 | |
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[ab42a9c] | 68 | /* Leg flags */ |
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[5c3c61a] | 69 | # define img_FLAG_SURFACE 0x01 |
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| 70 | # define img_FLAG_DUPLICATE 0x02 |
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[95c3272] | 71 | # define img_FLAG_SPLAY 0x04 |
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[d1b1380] | 72 | |
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[ab42a9c] | 73 | /* Station flags */ |
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[5cb0e72] | 74 | # define img_SFLAG_SURFACE 0x01 |
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| 75 | # define img_SFLAG_UNDERGROUND 0x02 |
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[dfb4240] | 76 | # define img_SFLAG_ENTRANCE 0x04 |
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| 77 | # define img_SFLAG_EXPORTED 0x08 |
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| 78 | # define img_SFLAG_FIXED 0x10 |
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[a2c33ae] | 79 | # define img_SFLAG_ANON 0x20 |
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[dcbcae0] | 80 | # define img_SFLAG_WALL 0x40 |
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[5cb0e72] | 81 | |
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[0c50ce3] | 82 | /* File-wide flags */ |
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| 83 | # define img_FFLAG_EXTENDED 0x80 |
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| 84 | |
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[8490ad9] | 85 | /* When writing img_XSECT, img_XFLAG_END in pimg->flags means this is the last |
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| 86 | * img_XSECT in this tube: |
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| 87 | */ |
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[ee05463] | 88 | # define img_XFLAG_END 0x01 |
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| 89 | |
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[eb5aea0] | 90 | # define img_STYLE_UNKNOWN -1 |
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| 91 | # define img_STYLE_NORMAL 0 |
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| 92 | # define img_STYLE_DIVING 1 |
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| 93 | # define img_STYLE_CARTESIAN 2 |
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| 94 | # define img_STYLE_CYLPOLAR 3 |
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[ac28f4f] | 95 | # define img_STYLE_NOSURVEY 4 |
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[eb5aea0] | 96 | |
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[be97baf] | 97 | /* 3D coordinates (in metres) */ |
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[0ed0e16] | 98 | typedef struct { |
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[a9f5117] | 99 | double x, y, z; |
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[0ed0e16] | 100 | } img_point; |
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[421b7d2] | 101 | |
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[d1b1380] | 102 | typedef struct { |
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[fbd182d] | 103 | /* Members you can access when reading (don't touch when writing): */ |
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[23f7ea7] | 104 | char *label; |
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[5c3c61a] | 105 | int flags; |
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[a2ad284] | 106 | char *title; |
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[43d63e57] | 107 | /* If the coordinate system was specified, this contains a PROJ4 string |
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| 108 | * describing it. If not, this member will be NULL. |
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| 109 | */ |
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| 110 | char *cs; |
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[ec812baa] | 111 | /* Older .3d format versions stored a human readable datestamp string. |
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| 112 | * Format versions >= 8 versions store a string consisting of "@" followed |
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| 113 | * by the number of seconds since midnight UTC on 1/1/1970. Some foreign |
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| 114 | * formats contain a human readable string, others no date information |
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| 115 | * (which results in "?" being returned). |
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[42bd3576] | 116 | */ |
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[a2ad284] | 117 | char *datestamp; |
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[4f70ebc] | 118 | /* The datestamp as a time_t (or (time_t)-1 if not available). |
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| 119 | * |
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| 120 | * For 3d format versions >= 8, this is a reliable value and in UTC. Older |
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| 121 | * 3d format versions store a human readable time, which img will attempt |
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| 122 | * to decode, but it may fail, particularly with handling timezones. Even |
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| 123 | * if it does work, beware that times in local time where DST applies are |
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| 124 | * inherently ambiguous around when the clocks go back. |
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| 125 | * |
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| 126 | * CMAP XYZ files contain a timestamp. It's probably in localtime (but |
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| 127 | * without any timezone information) and the example files are all pre-2000 |
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| 128 | * and have two digit years. We do our best to turn these into a useful |
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| 129 | * time_t value. |
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| 130 | */ |
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| 131 | time_t datestamp_numeric; |
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[eef68f9] | 132 | char separator; /* character used to separate survey levels ('.' usually) */ |
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[fbd182d] | 133 | |
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| 134 | /* Members that can be set when writing: */ |
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[1ee204e] | 135 | #if IMG_API_VERSION == 0 |
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[b5a3219] | 136 | time_t date1, date2; |
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[1ee204e] | 137 | #else /* IMG_API_VERSION == 1 */ |
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| 138 | int days1, days2; |
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| 139 | #endif |
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[ee7af72] | 140 | double l, r, u, d; |
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[fbd182d] | 141 | |
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[5dc3775] | 142 | /* Error information - valid when img_ERROR_INFO is returned: */ |
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[c61aa79] | 143 | int n_legs; |
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| 144 | double length; |
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| 145 | double E, H, V; |
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[fbd182d] | 146 | |
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[8be4d09] | 147 | /* The filename actually opened (e.g. may have ".3d" added). |
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| 148 | * |
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| 149 | * This is only set if img opened the filename - if an existing stream |
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| 150 | * is used (via img_read_stream() or similar) then this member will be |
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| 151 | * NULL. |
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| 152 | */ |
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[c61aa79] | 153 | char * filename_opened; |
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[fbd182d] | 154 | |
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| 155 | /* Non-zero if reading an extended elevation: */ |
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[eef68f9] | 156 | int is_extended_elevation; |
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[fbd182d] | 157 | |
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| 158 | /* Members that can be set when writing: */ |
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[eb5aea0] | 159 | /* The style of the data - one of the img_STYLE_* constants above */ |
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| 160 | int style; |
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| 161 | |
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[fbd182d] | 162 | /* All other members are for internal use only: */ |
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[a420b49] | 163 | FILE *fh; /* file handle of image file */ |
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[8be4d09] | 164 | int (*close_func)(FILE*); |
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[0ff23cb] | 165 | char *label_buf; |
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[23f7ea7] | 166 | size_t buf_len; |
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[d69255f] | 167 | size_t label_len; |
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[1fad6d4] | 168 | int fRead; /* 1 for reading, 0 for writing */ |
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[f2588ca] | 169 | long start; |
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[0da6e60] | 170 | /* version of file format: |
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[f1c7c9c7] | 171 | * -4 => CMAP .xyz file, shot format |
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| 172 | * -3 => CMAP .xyz file, station format |
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[ad4eaf3f] | 173 | * -2 => Compass .plt file |
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[0da6e60] | 174 | * -1 => .pos file |
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| 175 | * 0 => 0.01 ascii |
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| 176 | * 1 => 0.01 binary, |
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| 177 | * 2 => byte actions and flags |
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[ad4eaf3f] | 178 | * 3 => prefixes for legs; compressed prefixes |
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[b5a3219] | 179 | * 4 => survey date |
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[f4c5932] | 180 | * 5 => LRUD info |
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[c61aa79] | 181 | * 6 => error info |
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[1ee204e] | 182 | * 7 => more compact dates with wider range |
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[ec812baa] | 183 | * 8 => lots of changes |
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[0da6e60] | 184 | */ |
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[5c3c61a] | 185 | int version; |
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[76bbb7c9] | 186 | char *survey; |
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| 187 | size_t survey_len; |
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| 188 | int pending; /* for old style text format files and survey filtering */ |
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| 189 | img_point mv; |
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[1ee204e] | 190 | #if IMG_API_VERSION == 0 |
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[ee05463] | 191 | time_t olddate1, olddate2; |
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[1ee204e] | 192 | #else /* IMG_API_VERSION == 1 */ |
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| 193 | int olddays1, olddays2; |
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| 194 | #endif |
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[eb5aea0] | 195 | int oldstyle; |
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[d1b1380] | 196 | } img; |
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| 197 | |
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[5c3c61a] | 198 | /* Which version of the file format to output (defaults to newest) */ |
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| 199 | extern unsigned int img_output_version; |
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| 200 | |
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[2bb17c9] | 201 | /* Minimum supported value for img_output_version: */ |
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| 202 | #define IMG_VERSION_MIN 1 |
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| 203 | |
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| 204 | /* Maximum supported value for img_output_version: */ |
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[ec812baa] | 205 | #define IMG_VERSION_MAX 8 |
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[2bb17c9] | 206 | |
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[942629a] | 207 | /* Open a processed survey data file for reading |
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[7826201] | 208 | * |
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[d1b1380] | 209 | * fnm is the filename |
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[7826201] | 210 | * |
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[d1b1380] | 211 | * Returns pointer to an img struct or NULL |
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| 212 | */ |
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[a2ad284] | 213 | #define img_open(F) img_open_survey((F), NULL) |
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[76bbb7c9] | 214 | |
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[942629a] | 215 | /* Open a processed survey data file for reading |
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[7826201] | 216 | * |
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[76bbb7c9] | 217 | * fnm is the filename |
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[7826201] | 218 | * |
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[76bbb7c9] | 219 | * survey points to a survey name to restrict reading to (or NULL for all |
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| 220 | * survey data in the file) |
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[7826201] | 221 | * |
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| 222 | * Returns pointer to an img struct or NULL |
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[76bbb7c9] | 223 | */ |
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[a2ad284] | 224 | img *img_open_survey(const char *fnm, const char *survey); |
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[d1b1380] | 225 | |
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[22753f1] | 226 | /* Read processed survey data from an existing stream. |
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[8be4d09] | 227 | * |
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| 228 | * stream is a FILE* open on the stream (can be NULL which will give error |
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| 229 | * IMG_FILENOTFOUND so you don't need to handle that case specially). The |
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| 230 | * stream should be opened for reading in binary mode and positioned at the |
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| 231 | * start of the survey data file. |
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| 232 | * |
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| 233 | * close_func is a function to call to close the stream (most commonly |
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| 234 | * fclose, or pclose if the stream was opened using popen()) or NULL if |
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| 235 | * the caller wants to take care of closing the stream. |
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| 236 | * |
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| 237 | * filename is used to determine the format based on the file extension, |
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| 238 | * and also the leafname with the extension removed is used for the survey |
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| 239 | * title for formats which don't support a title or when no title is |
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| 240 | * specified. If you're not interested in default titles, you can just |
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| 241 | * pass the extension including a leading "." - e.g. ".3d". May not be |
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| 242 | * NULL. |
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| 243 | * |
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| 244 | * Returns pointer to an img struct or NULL on error. Any close function |
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| 245 | * specified is called on error (unless stream is NULL). |
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| 246 | */ |
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| 247 | #define img_read_stream(S, C, F) img_read_stream_survey((S), (C), (F), NULL) |
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| 248 | |
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[22753f1] | 249 | /* Read processed survey data from an existing stream. |
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[8be4d09] | 250 | * |
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| 251 | * stream is a FILE* open on the stream (can be NULL which will give error |
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| 252 | * IMG_FILENOTFOUND so you don't need to handle that case specially). The |
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| 253 | * stream should be opened for reading in binary mode and positioned at the |
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| 254 | * start of the survey data file. |
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| 255 | * |
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| 256 | * close_func is a function to call to close the stream (most commonly |
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| 257 | * fclose, or pclose if the stream was opened using popen()) or NULL if |
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| 258 | * the caller wants to take care of closing the stream. |
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| 259 | * |
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| 260 | * filename is used to determine the format based on the file extension, |
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| 261 | * and also the leafname with the extension removed is used for the survey |
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| 262 | * title for formats which don't support a title or when no title is |
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| 263 | * specified. If you're not interested in default titles, you can just |
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| 264 | * pass the extension including a leading "." - e.g. ".3d". filename must |
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| 265 | * not be NULL. |
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| 266 | * |
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| 267 | * survey points to a survey name to restrict reading to (or NULL for all |
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| 268 | * survey data in the file) |
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| 269 | * |
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| 270 | * Returns pointer to an img struct or NULL on error. Any close function |
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| 271 | * specified is called on error. |
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| 272 | */ |
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| 273 | img *img_read_stream_survey(FILE *stream, int (*close_func)(FILE*), |
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| 274 | const char *filename, |
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| 275 | const char *survey); |
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| 276 | |
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[a3b3aef] | 277 | /* Open a .3d file for output with no specified coordinate system |
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| 278 | * |
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| 279 | * This is a very thin wrapper around img_open_write_cs() which passes NULL for |
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| 280 | * cs, provided for compatibility with the API provided before support for |
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| 281 | * coordinate systems was added. |
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| 282 | * |
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| 283 | * See img_open_write_cs() for documentation. |
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| 284 | */ |
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| 285 | #define img_open_write(F, T, S) img_open_write_cs(F, T, NULL, S) |
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| 286 | |
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| 287 | /* Open a .3d file for output in a specified coordinate system |
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[7826201] | 288 | * |
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[d1b1380] | 289 | * fnm is the filename |
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[7826201] | 290 | * |
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[0c50ce3] | 291 | * title is the title |
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[7826201] | 292 | * |
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[a3b3aef] | 293 | * cs is a PROJ4 string describing the coordinate system (or NULL to not |
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| 294 | * specify a coordinate system). |
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| 295 | * |
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[0c50ce3] | 296 | * flags contains a bitwise-or of any file-wide flags - currently only one |
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[a3b3aef] | 297 | * is available: img_FFLAG_EXTENDED. |
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[0c50ce3] | 298 | * |
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[ad9a5cd] | 299 | * Returns pointer to an img struct or NULL for error (check img_error() |
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| 300 | * for details) |
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[d1b1380] | 301 | */ |
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[a3b3aef] | 302 | img *img_open_write_cs(const char *fnm, const char *title, const char * cs, |
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| 303 | int flags); |
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[43d63e57] | 304 | |
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[a3b3aef] | 305 | /* Write a .3d file to a stream |
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[7826201] | 306 | * |
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[a3b3aef] | 307 | * stream is a FILE* open on the stream (can be NULL which will give error |
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| 308 | * IMG_FILENOTFOUND so you don't need to handle that case specially). The |
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| 309 | * stream should be opened for writing in binary mode. |
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| 310 | * |
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| 311 | * close_func is a function to call to close the stream (most commonly |
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| 312 | * fclose, or pclose if the stream was opened using popen()) or NULL if |
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| 313 | * the caller wants to take care of closing the stream. |
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[7826201] | 314 | * |
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[43d63e57] | 315 | * title is the title |
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[7826201] | 316 | * |
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[a3b3aef] | 317 | * cs is a PROJ4 string describing the coordinate system (or NULL to not |
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| 318 | * specify a coordinate system). |
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[8be4d09] | 319 | * |
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[43d63e57] | 320 | * flags contains a bitwise-or of any file-wide flags - currently only one |
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| 321 | * is available: img_FFLAG_EXTENDED. |
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| 322 | * |
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| 323 | * Returns pointer to an img struct or NULL for error (check img_error() |
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[a3b3aef] | 324 | * for details). Any close function specified is called on error (unless |
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| 325 | * stream is NULL). |
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[43d63e57] | 326 | */ |
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[a3b3aef] | 327 | img *img_write_stream(FILE *stream, int (*close_func)(FILE*), |
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| 328 | const char *title, const char * cs, int flags); |
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[d1b1380] | 329 | |
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[942629a] | 330 | /* Read an item from a processed survey data file |
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[7826201] | 331 | * |
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[d1b1380] | 332 | * pimg is a pointer to an img struct returned by img_open() |
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[7826201] | 333 | * |
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[0ed0e16] | 334 | * coordinates are returned in p |
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[7826201] | 335 | * |
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[23f7ea7] | 336 | * flags and label name are returned in fields in pimg |
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[7826201] | 337 | * |
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[d1b1380] | 338 | * Returns img_XXXX as #define-d above |
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| 339 | */ |
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[23f7ea7] | 340 | int img_read_item(img *pimg, img_point *p); |
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[d1b1380] | 341 | |
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[0ed0e16] | 342 | /* Write a item to a .3d file |
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[7826201] | 343 | * |
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[d1b1380] | 344 | * pimg is a pointer to an img struct returned by img_open_write() |
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[7826201] | 345 | * |
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[d1b1380] | 346 | * code is one of the img_XXXX #define-d above |
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[7826201] | 347 | * |
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[ee05463] | 348 | * flags is the leg, station, or xsect flags |
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| 349 | * (meaningful for img_LINE, img_LABEL, and img_XSECT respectively) |
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[7826201] | 350 | * |
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[95c3272] | 351 | * s is the label (only meaningful for img_LABEL) |
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[7826201] | 352 | * |
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[0ed0e16] | 353 | * x, y, z are the coordinates |
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[d1b1380] | 354 | */ |
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[95c3272] | 355 | void img_write_item(img *pimg, int code, int flags, const char *s, |
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[a9f5117] | 356 | double x, double y, double z); |
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[f2588ca] | 357 | |
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[c61aa79] | 358 | /* Write error information for the current traverse |
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[7826201] | 359 | * |
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[c61aa79] | 360 | * n_legs is the number of legs in the traverse |
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[7826201] | 361 | * |
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[c61aa79] | 362 | * length is the traverse length (in m) |
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[7826201] | 363 | * |
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[c61aa79] | 364 | * E is the ratio of the observed misclosure to the theoretical one |
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[7826201] | 365 | * |
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[c61aa79] | 366 | * H is the ratio of the observed horizontal misclosure to the theoretical one |
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[7826201] | 367 | * |
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[c61aa79] | 368 | * V is the ratio of the observed vertical misclosure to the theoretical one |
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| 369 | */ |
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| 370 | void img_write_errors(img *pimg, int n_legs, double length, |
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| 371 | double E, double H, double V); |
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| 372 | |
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[942629a] | 373 | /* rewind a processed survey data file opened for reading |
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| 374 | * |
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| 375 | * This is useful if you want to read the data in several passes. |
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[7826201] | 376 | * |
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[f2588ca] | 377 | * pimg is a pointer to an img struct returned by img_open() |
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[7826201] | 378 | * |
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[9f3e5df] | 379 | * Returns: non-zero for success, zero for error (check img_error() for |
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| 380 | * details) |
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[f2588ca] | 381 | */ |
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[9f3e5df] | 382 | int img_rewind(img *pimg); |
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[f2588ca] | 383 | |
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[942629a] | 384 | /* Close a processed survey data file |
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[7826201] | 385 | * |
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[d1b1380] | 386 | * pimg is a pointer to an img struct returned by img_open() or |
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| 387 | * img_open_write() |
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[7826201] | 388 | * |
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[ad9a5cd] | 389 | * Returns: non-zero for success, zero for error (check img_error() for |
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| 390 | * details) |
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[d1b1380] | 391 | */ |
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[ad9a5cd] | 392 | int img_close(img *pimg); |
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[d1b1380] | 393 | |
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| 394 | /* Codes returned by img_error */ |
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[a420b49] | 395 | typedef enum { |
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| 396 | IMG_NONE = 0, IMG_FILENOTFOUND, IMG_OUTOFMEMORY, |
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[ad9a5cd] | 397 | IMG_CANTOPENOUT, IMG_BADFORMAT, IMG_DIRECTORY, |
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[6c1c4f3] | 398 | IMG_READERROR, IMG_WRITEERROR, IMG_TOONEW |
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[a420b49] | 399 | } img_errcode; |
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[d1b1380] | 400 | |
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| 401 | /* Read the error code |
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[7826201] | 402 | * |
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[a405bc1] | 403 | * If img_open(), img_open_survey() or img_open_write() returns NULL, or |
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| 404 | * img_rewind() or img_close() returns 0, or img_read_item() returns img_BAD |
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| 405 | * then you can call this function to discover why. |
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| 406 | */ |
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[a420b49] | 407 | img_errcode img_error(void); |
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[d1b1380] | 408 | |
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[8df22e9] | 409 | #ifdef __cplusplus |
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[f2daf3b] | 410 | } |
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| 411 | #endif |
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| 412 | |
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[d1b1380] | 413 | #endif |
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