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gisinit.c

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00001 
00017 #include <stdio.h>
00018 #include <unistd.h>
00019 #include <stdlib.h>
00020 #include <string.h>
00021 #include <sys/stat.h>
00022 #include <locale.h>
00023 
00024 #include <grass/gis.h>
00025 #include "G.h"
00026 #include <grass/glocale.h>
00027 
00028 struct G__ G__;
00029 
00030 static int initialized = 0; 
00031 static int gisinit(void);
00032 
00033 
00044 int G__gisinit(const char *version, const char *pgm)
00045 {
00046     char *mapset;
00047 
00048     if (initialized)
00049         return 0;
00050 
00051     G_set_program_name(pgm);
00052 
00053     if (strcmp(version, GIS_H_VERSION) != 0)
00054         G_fatal_error(_("Incompatible library version for module. "
00055                         "You need to rebuild GRASS or untangle multiple installations."));
00056 
00057     /* Make sure location and mapset are set */
00058     G_location_path();
00059     switch (G__mapset_permissions(mapset = G_mapset())) {
00060     case 1:
00061         break;
00062     case 0:
00063         G_fatal_error(_("MAPSET %s - permission denied"), mapset);
00064         break;
00065     default:
00066         G_fatal_error(_("MAPSET %s not found"), mapset);
00067         break;
00068     }
00069 
00070     gisinit();
00071 
00072     return 0;
00073 }
00074 
00075 
00084 int G__no_gisinit(const char *version)
00085 {
00086     if (initialized)
00087         return 0;
00088 
00089     if (strcmp(version, GIS_H_VERSION) != 0)
00090         G_fatal_error(_("Incompatible library version for module. "
00091                         "You need to rebuild GRASS or untangle multiple installations."));
00092 
00093     gisinit();
00094 
00095     return 0;
00096 }
00097 
00098 
00106 int G__check_gisinit(void)
00107 {
00108     if (initialized)
00109         return 1;
00110     G_warning(_("System not initialized. Programmer forgot to call G_gisinit()."));
00111     G_sleep(3);
00112     exit(EXIT_FAILURE);
00113 }
00114 
00115 
00116 static int gisinit(void)
00117 {
00118     /* Mark window as not set */
00119     G__.window_set = 0;
00120 
00121     /* no histograms */
00122     G__.want_histogram = 0;
00123 
00124     /* Set compressed data buffer size to zero */
00125     G__.compressed_buf_size = 0;
00126     G__.work_buf_size = 0;
00127     G__.null_buf_size = 0;
00128     G__.mask_buf_size = 0;
00129     G__.temp_buf_size = 0;
00130     /* mask buf we always want to keep allocated */
00131     G__reallocate_mask_buf();
00132 
00133     /* set the write type for floating maps */
00134     G__.fp_type = FCELL_TYPE;
00135     G__.fp_nbytes = XDR_FLOAT_NBYTES;
00136 
00137     /* Set masking flag unknown */
00138     G__.auto_mask = -1;
00139 
00140     /* set architecture dependent bit patterns for embeded null vals */
00141     G__init_null_patterns();
00142 
00143     initialized = 1;
00144 
00145     setlocale(LC_NUMERIC, "C");
00146 
00147     return 0;
00148 }

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