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/* configfile.c: parsing of config files
*
* Copyright (C) 2008 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include <ctype.h>
#include <stdio.h>
#include "configfile.h"
int next_char(FILE *f)
{
int c = fgetc(f);
if (c == '\r') {
c = fgetc(f);
if (c != '\n') {
ungetc(c, f);
c = '\r';
}
}
return c;
}
void skip_line(FILE *f)
{
int c;
while ((c = next_char(f)) && c != '\n' && c != EOF)
;
}
int read_config_line(FILE *f, char *line, const char **value, int bufsize)
{
int i = 0, isname = 0;
*value = NULL;
while (i < bufsize - 1) {
int c = next_char(f);
if (!isname && (c == '#' || c == ';')) {
skip_line(f);
continue;
}
if (!isname && isspace(c))
continue;
if (c == '=' && !*value) {
line[i] = 0;
*value = &line[i + 1];
} else if (c == '\n' && !isname) {
i = 0;
continue;
} else if (c == '\n' || c == EOF) {
line[i] = 0;
break;
} else {
line[i] = c;
}
isname = 1;
i++;
}
line[i + 1] = 0;
return i;
}
int parse_configfile(const char *filename, configfile_value_fn fn)
{
static int nesting;
int len;
char line[256];
const char *value;
FILE *f;
/* cancel deeply nested include-commands */
if (nesting > 8)
return -1;
if (!(f = fopen(filename, "r")))
return -1;
nesting++;
while ((len = read_config_line(f, line, &value, sizeof(line))) > 0)
fn(line, value);
nesting--;
fclose(f);
return 0;
}
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