50e70d32f0
Use struct strbuf from Git instead of fixed-size buffers to remove the limit on the length of configuration file lines and refactor read_config_line() to improve readability. Note that this also fixes a buffer overflow that existed with the original fixed-size buffer implementation. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
90 line
1.5 KiB
C
90 line
1.5 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, struct strbuf *name, struct strbuf *value)
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{
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int c = next_char(f);
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strbuf_reset(name);
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strbuf_reset(value);
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/* Skip comments and preceding spaces. */
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for(;;) {
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if (c == '#' || c == ';')
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skip_line(f);
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else if (!isspace(c))
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break;
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c = next_char(f);
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}
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/* Read variable name. */
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while (c != '=') {
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if (c == '\n' || c == EOF)
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return 0;
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strbuf_addch(name, c);
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c = next_char(f);
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}
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/* Read variable value. */
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c = next_char(f);
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while (c != '\n' && c != EOF) {
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strbuf_addch(value, c);
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c = next_char(f);
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}
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return 1;
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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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struct strbuf name = STRBUF_INIT;
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struct strbuf value = STRBUF_INIT;
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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 (read_config_line(f, &name, &value))
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fn(name.buf, value.buf);
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nesting--;
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fclose(f);
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strbuf_release(&name);
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strbuf_release(&value);
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return 0;
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}
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