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/* 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"
#if !INI_USE_STACK
#include <stdlib.h>
#endif
#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((unsigned char)(*--p)))
*p = '\0';
return s;
}
/* Return pointer to first non-whitespace char in given string. */
static char* lskip(const char* s)
{
while ( *s && isspace((unsigned char)(*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((unsigned char)(*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* 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) */
#if INI_USE_STACK
char line[INI_MAX_LINE];
#else
char* line;
#endif
char section[MAX_SECTION] = "";
char prev_name[MAX_NAME] = "";
char* start;
char* end;
char* name;
char* value;
int lineno = 0;
int error = 0;
#if !INI_USE_STACK
line = (char*)malloc( INI_MAX_LINE );
if ( !line ) {
return -2;
}
#endif
/* Scan through file line by line */
while ( fgets( line, INI_MAX_LINE, file ) != NULL ) {
lineno++;
start = line;
#if INI_ALLOW_BOM
if (lineno == 1 && (unsigned char)start[0] == 0xEF &&
(unsigned char)start[1] == 0xBB &&
(unsigned char)start[2] == 0xBF) {
start += 3;
}
#endif
start = lskip( rstrip( start ) );
if ( *start == ';' || *start == '#' ) {
/* Per Python ConfigParser, allow '#' comments at start of line */
}
#if INI_ALLOW_MULTILINE
else 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;
}
#endif
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;
}
} else if ( *start && *start != ';' ) {
/* Not a comment, must be a name[=:]value pair */
end = find_char_or_comment( start, '=' );
if ( *end != '=' ) {
end = find_char_or_comment( start, ':' );
}
if ( *end == '=' || *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;
} else if ( !error ) {
/* No '=' or ':' found on name[=:]value line */
error = lineno;
}
}
}
#if !INI_USE_STACK
free( line );
#endif
return error;
}
/* See documentation in header file. */
int ini_parse(const char* filename, int (*handler)(void*, const char*, const char*, const char*), void* user)
{
FILE* file;
int error;
file = fopen( filename, "r" );
if ( !file ) return -1;
error = ini_parse_file( file, handler, user );
fclose( file );
return error;
}
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