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/*!
\file hist.c
\brief Vector library - history manipulation
Higher level functions for reading/writing/manipulating vectors.
(C) 2001-2008 by the GRASS Development Team
This program is free software under the
GNU General Public License (>=v2).
Read the file COPYING that comes with GRASS
for details.
\author Radim Blazek
\date 2001-2008
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <grass/Vect.h>
/*!
\brief Write command info to history file
\param Map vector map
\return 0 OK
\return -1 error
*/
int Vect_hist_command(struct Map_info *Map)
{
char *cmd, buf[2000];
G_debug(3, "Vect_hist_command()");
cmd = G_recreate_command();
Vect_hist_write(Map, "COMMAND: ");
Vect_hist_write(Map, cmd);
Vect_hist_write(Map, "\n");
sprintf(buf, "GISDBASE: %s\n", G_gisdbase()); /* Needed ? */
Vect_hist_write(Map, buf);
sprintf(buf, "LOCATION: %s MAPSET: %s USER: %s DATE: %s\n", G_location(), G_mapset(), G_whoami(), G_date()); /* Needed ? */
Vect_hist_write(Map, buf);
return 0;
}
/*!
\brief Write string to history file
\param Map vector map
\param str string to write
\return the number of characters printed
*/
int Vect_hist_write(struct Map_info *Map, const char *str)
{
int ret;
G_debug(5, "Vect_hist_write()");
ret = fprintf(Map->hist_fp, "%s", str);
fflush(Map->hist_fp);
return (ret);
}
/*!
\brief Reads one line from history file without newline character
\param s buffer, allocated space must be size+1
\param size maximum number of character
\param Map vector map
\return return s on success
\return NULL on error
\return EOF end of file
*/
char *Vect_hist_read(char *s, int size, struct Map_info *Map)
{
int ret;
G_debug(5, "Vect_hist_read()");
if (Map->hist_fp == NULL)
return NULL; /* OK for shapefile etc. */
ret = G_getl2(s, size, Map->hist_fp);
if (ret == 1)
return s;
return NULL;
}
/*!
\brief Rewind history file
\param Map vector map
\return void
*/
void Vect_hist_rewind(struct Map_info *Map)
{
G_debug(3, "Vect_hist_rewind()");
if (Map->hist_fp != NULL)
rewind(Map->hist_fp);
}
/*!
\brief Copy history from one map to another
\param In input vector map
\param Out output vector map
\return 0 OK
\return -1 error
*/
int Vect_hist_copy(struct Map_info *In, struct Map_info *Out)
{
size_t red, ret;
char buf[1000];
G_debug(3, "Vect_hist_copy()");
if (In->hist_fp == NULL)
return 0; /* This is correct (old hist doesn't exist) */
if (Out->hist_fp == NULL)
return -1;
fseek(Out->hist_fp, (long)0, SEEK_END);
rewind(In->hist_fp);
while ((red = fread(buf, sizeof(char), sizeof(char) * 1000, In->hist_fp))) {
if (!(ret = fwrite(buf, sizeof(char), red, Out->hist_fp))) {
return (-1);
}
fflush(Out->hist_fp);
}
/* In ends with \n ? */
fseek(In->hist_fp, (long)-1, SEEK_END);
if (fread(buf, sizeof(char), sizeof(char), In->hist_fp) != 1) {
return -1;
}
if (buf[0] != '\n') {
Vect_hist_write(Out, "\n");
}
/* Separator */
Vect_hist_write(Out,
"---------------------------------------------------------------------------------\n");
return (0);
}
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