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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"
static 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;
}
static void skip_line(FILE *f)
{
int c;
while ((c = next_char(f)) && c != '\n' && c != EOF)
;
}
static int read_config_line(FILE *f, struct strbuf *name, struct strbuf *value)
{
int c = next_char(f);
strbuf_reset(name);
strbuf_reset(value);
/* Skip comments and preceding spaces. */
for(;;) {
if (c == '#' || c == ';')
skip_line(f);
else if (!isspace(c))
break;
c = next_char(f);
}
/* Read variable name. */
while (c != '=') {
if (c == '\n' || c == EOF)
return 0;
strbuf_addch(name, c);
c = next_char(f);
}
/* Read variable value. */
c = next_char(f);
while (c != '\n' && c != EOF) {
strbuf_addch(value, c);
c = next_char(f);
}
return 1;
}
int parse_configfile(const char *filename, configfile_value_fn fn)
{
static int nesting;
struct strbuf name = STRBUF_INIT;
struct strbuf value = STRBUF_INIT;
FILE *f;
/* cancel deeply nested include-commands */
if (nesting > 8)
return -1;
if (!(f = fopen(filename, "r")))
return -1;
nesting++;
while (read_config_line(f, &name, &value))
fn(name.buf, value.buf);
nesting--;
fclose(f);
strbuf_release(&name);
strbuf_release(&value);
return 0;
}
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