| -rw-r--r-- | configfile.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/configfile.c b/configfile.c new file mode 100644 index 0000000..4908058 --- a/dev/null +++ b/configfile.c @@ -0,0 +1,87 @@ +/* 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; +} + |