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#include <stdlib.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/glocale.h>
#include "local_proto.h"
static int parse_option_pg(const char *, char **, char **);
void make_link(const char *dsn_opt, const char *format, char *option_str,
char **options)
{
int use_ogr;
char *filename, *dsn;
FILE *fp;
struct Key_Value *key_val;
key_val = G_create_key_value();
/* check for weird options */
if (G_strncasecmp(dsn_opt, "PG:", 3) == 0 &&
strcmp(format, "PostgreSQL") != 0)
G_warning(_("Data source starts with \"PG:\" prefix, expecting "
"\"PostgreSQL\" "
"format (\"%s\" given)"),
format);
/* use OGR ? */
use_ogr = is_ogr(format);
if (use_ogr) {
filename = "OGR";
G_remove("", "PG");
}
else {
filename = "PG";
G_remove("", "OGR");
}
/* be friendly, ignored 'PG:' prefix for GRASS-PostGIS data driver */
if (!use_ogr && strcmp(format, "PostgreSQL") == 0 &&
G_strncasecmp(dsn_opt, "PG:", 3) == 0) {
int i, length;
length = strlen(dsn_opt);
dsn = (char *)G_malloc(length - 3);
for (i = 3; i < length; i++)
dsn[i - 3] = dsn_opt[i];
dsn[length - 3] = '\0';
}
else {
dsn = G_store(dsn_opt);
}
/* parse options for PG data format */
if (options && *options && !use_ogr) {
int i;
char *key, *value;
i = 0;
while (options[i]) {
if (parse_option_pg(options[i++], &key, &value) != 0)
continue;
G_set_key_value(key, value, key_val);
}
}
/* datasource section */
if (dsn) {
if (use_ogr)
G_set_key_value("dsn", dsn, key_val);
else
G_set_key_value("conninfo", dsn, key_val);
}
if (use_ogr) { /* OGR */
if (format)
G_set_key_value("format", format, key_val);
if (option_str)
G_set_key_value("options", option_str, key_val);
}
else { /* PG */
G_set_key_value("format", "PostgreSQL", key_val);
}
/* save file - OGR or PG */
fp = G_fopen_new("", filename);
if (!fp)
G_fatal_error(_("Unable to create settings file"));
if (G_fwrite_key_value(fp, key_val) < 0)
G_fatal_error(_("Error writing settings file"));
fclose(fp);
if (use_ogr)
G_verbose_message(_("Switched to OGR format (%s)"),
G_find_key_value("format", key_val));
else
G_verbose_message(_("Switched to PostGIS format"));
G_free_key_value(key_val);
}
int parse_option_pg(const char *option, char **key, char **value)
{
char **tokens;
tokens = G_tokenize(option, "=");
if (G_number_of_tokens(tokens) != 2) {
G_warning(_("Unable to parse option '%s'"), option);
return 1;
}
*key = G_store(tokens[0]);
G_str_to_lower(*key);
*value = G_store(tokens[1]);
G_str_to_lower(*value);
G_free_tokens(tokens);
return 0;
}
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