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