blob: 909a2fc6b2096cb8639c35da9c0bb5c88b315846 [file] [log] [blame]
/* inih -- simple .INI file parser
inih is released under the New BSD license (see LICENSE.txt). Go to the project
home page for more info:
http://code.google.com/p/inih/
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "ini.h"
#define MAX_LINE 200
#define MAX_SECTION 50
#define MAX_NAME 50
/* Strip whitespace chars off end of given string, in place. Return s. */
static char* rstrip(char* s)
{
char* p = s + strlen(s);
while (p > s && isspace(*--p))
*p = '\0';
return s;
}
/* Return pointer to first non-whitespace char in given string. */
static char* lskip(const char* s)
{
while (*s && isspace(*s))
s++;
return (char*)s;
}
/* Return pointer to first char c or ';' comment in given string, or pointer to
null at end of string if neither found. ';' must be prefixed by a whitespace
character to register as a comment. */
static char* find_char_or_comment(const char* s, char c)
{
int was_whitespace = 0;
while (*s && *s != c && !(was_whitespace && *s == ';')) {
was_whitespace = isspace(*s);
s++;
}
return (char*)s;
}
/* Version of strncpy that ensures dest (size bytes) is null-terminated. */
static char* strncpy0(char* dest, const char* src, size_t size)
{
strncpy(dest, src, size);
dest[size - 1] = '\0';
return dest;
}
/* See documentation in header file. */
int ini_parse(FILE *file,
int (*handler)(void*, const char*, const char*, const char*),
void* user)
{
/* Uses a fair bit of stack (use heap instead if you need to) */
char line[MAX_LINE];
char section[MAX_SECTION] = "";
char prev_name[MAX_NAME] = "";
char* start;
char* end;
char* name;
char* value;
int lineno = 0;
int error = 0;
/* Scan through file line by line */
while (fgets(line, sizeof(line), file) != NULL) {
lineno++;
start = lskip(rstrip(line));
#if INI_ALLOW_MULTILINE
if (*prev_name && *start && start > line) {
/* Non-black line with leading whitespace, treat as continuation
of previous name's value (as per Python ConfigParser). */
if (!handler(user, section, prev_name, start) && !error) {
error = lineno;
break;
}
}
else
#endif
if (*start == ';' || *start == '#') {
/* Per Python ConfigParser, allow '#' comments at start of line */
}
else if (*start == '[') {
/* A "[section]" line */
end = find_char_or_comment(start + 1, ']');
if (*end == ']') {
*end = '\0';
strncpy0(section, start + 1, sizeof(section));
*prev_name = '\0';
}
else if (!error) {
/* No ']' found on section line */
error = lineno;
break;
}
}
else if (*start && *start != ';') {
/* Not a comment, must be a name=value pair */
end = find_char_or_comment(start, '=');
if (*end == '=') {
*end = '\0';
name = rstrip(start);
value = lskip(end + 1);
end = find_char_or_comment(value, '\0');
if (*end == ';')
*end = '\0';
rstrip(value);
/* Valid name=value pair found, call handler */
strncpy0(prev_name, name, sizeof(prev_name));
if (!handler(user, section, name, value) && !error) {
error = lineno;
break;
}
}
else if (!error) {
/* No '=' found on name=value line */
error = lineno;
break;
}
}
}
return error;
}