647 lines
20 KiB
C
647 lines
20 KiB
C
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/*-------------------------------------------------------------------------*/
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/**
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@file iniparser.c
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@author N. Devillard
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@date Sep 2007
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@version 3.0
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@brief Parser for ini files.
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*/
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/*--------------------------------------------------------------------------*/
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/*
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$Id: iniparser.c,v 2.18 2008-01-03 18:35:39 ndevilla Exp $
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$Revision: 2.18 $
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$Date: 2008-01-03 18:35:39 $
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*/
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/*---------------------------- Includes ------------------------------------*/
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#include <ctype.h>
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#include <libiniparser.h>
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/*---------------------------- Defines -------------------------------------*/
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#define ASCIILINESZ (1024)
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#define INI_INVALID_KEY ((char*)-1)
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/*---------------------------------------------------------------------------
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Private to this module
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---------------------------------------------------------------------------*/
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/**
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* This enum stores the status for each parsed line (internal use only).
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*/
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typedef enum _line_status_ {
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LINE_UNPROCESSED,
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LINE_ERROR,
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LINE_EMPTY,
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LINE_COMMENT,
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LINE_SECTION,
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LINE_VALUE
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} line_status ;
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/*-------------------------------------------------------------------------*/
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/**
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@brief Convert a string to lowercase.
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@param s String to convert.
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@return ptr to statically allocated string.
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This function returns a pointer to a statically allocated string
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containing a lowercased version of the input string. Do not free
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or modify the returned string! Since the returned string is statically
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allocated, it will be modified at each function call (not re-entrant).
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*/
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/*--------------------------------------------------------------------------*/
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static char * strlwc(const char * s)
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{
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static char l[ASCIILINESZ+1];
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int i ;
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if (s==NULL) return NULL ;
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memset(l, 0, ASCIILINESZ+1);
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i=0 ;
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while (s[i] && i<ASCIILINESZ) {
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l[i] = (char)tolower((int)s[i]);
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i++ ;
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}
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l[ASCIILINESZ]=(char)0;
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return l ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Remove blanks at the beginning and the end of a string.
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@param s String to parse.
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@return ptr to statically allocated string.
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This function returns a pointer to a statically allocated string,
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which is identical to the input string, except that all blank
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characters at the end and the beg. of the string have been removed.
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Do not free or modify the returned string! Since the returned string
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is statically allocated, it will be modified at each function call
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(not re-entrant).
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*/
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/*--------------------------------------------------------------------------*/
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static char * strstrip(char * s)
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{
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static char l[ASCIILINESZ+1];
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char * last ;
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if (s==NULL) return NULL ;
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while (isspace((int)*s) && *s) s++;
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memset(l, 0, ASCIILINESZ+1);
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strcpy(l, s);
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last = l + strlen(l);
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while (last > l) {
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if (!isspace((int)*(last-1)))
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break ;
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last -- ;
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}
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*last = (char)0;
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return (char*)l ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Get number of sections in a dictionary
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@param d Dictionary to examine
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@return int Number of sections found in dictionary
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This function returns the number of sections found in a dictionary.
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The test to recognize sections is done on the string stored in the
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dictionary: a section name is given as "section" whereas a key is
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stored as "section:key", thus the test looks for entries that do not
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contain a colon.
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This clearly fails in the case a section name contains a colon, but
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this should simply be avoided.
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This function returns -1 in case of error.
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*/
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/*--------------------------------------------------------------------------*/
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int iniparser_getnsec(dictionary * d)
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{
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int i ;
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int nsec ;
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if (d==NULL) return -1 ;
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nsec=0 ;
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for (i=0 ; i<d->size ; i++) {
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if (d->key[i]==NULL)
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continue ;
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if (strchr(d->key[i], ':')==NULL) {
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nsec ++ ;
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}
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}
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return nsec ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Get name for section n in a dictionary.
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@param d Dictionary to examine
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@param n Section number (from 0 to nsec-1).
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@return Pointer to char string
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This function locates the n-th section in a dictionary and returns
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its name as a pointer to a string statically allocated inside the
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dictionary. Do not free or modify the returned string!
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This function returns NULL in case of error.
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*/
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/*--------------------------------------------------------------------------*/
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char * iniparser_getsecname(dictionary * d, int n)
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{
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int i ;
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int foundsec ;
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if (d==NULL || n<0) return NULL ;
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foundsec=0 ;
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for (i=0 ; i<d->size ; i++) {
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if (d->key[i]==NULL)
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continue ;
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if (strchr(d->key[i], ':')==NULL) {
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foundsec++ ;
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if (foundsec>n)
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break ;
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}
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}
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if (foundsec<=n) {
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return NULL ;
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}
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return d->key[i] ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Dump a dictionary to an opened file pointer.
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@param d Dictionary to dump.
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@param f Opened file pointer to dump to.
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@return void
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This function prints out the contents of a dictionary, one element by
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line, onto the provided file pointer. It is OK to specify @c stderr
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or @c stdout as output files. This function is meant for debugging
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purposes mostly.
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*/
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/*--------------------------------------------------------------------------*/
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void iniparser_dump(dictionary * d, FILE * f)
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{
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int i ;
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if (d==NULL || f==NULL) return ;
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for (i=0 ; i<d->size ; i++) {
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if (d->key[i]==NULL)
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continue ;
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if (d->val[i]!=NULL) {
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fprintf(f, "[%s]=[%s]\n", d->key[i], d->val[i]);
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} else {
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fprintf(f, "[%s]=UNDEF\n", d->key[i]);
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}
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}
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return ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Save a dictionary to a loadable ini file
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@param d Dictionary to dump
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@param f Opened file pointer to dump to
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@return void
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This function dumps a given dictionary into a loadable ini file.
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It is Ok to specify @c stderr or @c stdout as output files.
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*/
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/*--------------------------------------------------------------------------*/
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void iniparser_dump_ini(dictionary * d, FILE * f)
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{
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int i, j ;
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char keym[ASCIILINESZ+1];
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int nsec ;
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char * secname ;
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int seclen ;
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if (d==NULL || f==NULL) return ;
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nsec = iniparser_getnsec(d);
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if (nsec<1) {
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/* No section in file: dump all keys as they are */
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for (i=0 ; i<d->size ; i++) {
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if (d->key[i]==NULL)
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continue ;
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fprintf(f, "%s = %s\n", d->key[i], d->val[i]);
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}
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return ;
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}
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for (i=0 ; i<nsec ; i++) {
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secname = iniparser_getsecname(d, i) ;
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seclen = (int)strlen(secname);
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fprintf(f, "\n[%s]\n", secname);
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sprintf(keym, "%s:", secname);
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for (j=0 ; j<d->size ; j++) {
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if (d->key[j]==NULL)
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continue ;
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if (!strncmp(d->key[j], keym, seclen+1)) {
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fprintf(f,
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"%-30s = %s\n",
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d->key[j]+seclen+1,
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d->val[j] ? d->val[j] : "");
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}
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}
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}
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fprintf(f, "\n");
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return ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Get the string associated to a key
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@param d Dictionary to search
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@param key Key string to look for
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@param def Default value to return if key not found.
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@return pointer to statically allocated character string
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This function queries a dictionary for a key. A key as read from an
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ini file is given as "section:key". If the key cannot be found,
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the pointer passed as 'def' is returned.
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The returned char pointer is pointing to a string allocated in
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the dictionary, do not free or modify it.
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*/
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/*--------------------------------------------------------------------------*/
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char * iniparser_getstring(dictionary * d, const char * key, char * def)
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{
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char * lc_key ;
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char * sval ;
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if (d==NULL || key==NULL)
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return def ;
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lc_key = strlwc(key);
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sval = dictionary_get(d, lc_key, def);
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return sval ;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Get the string associated to a key, convert to an int
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@param d Dictionary to search
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@param key Key string to look for
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@param notfound Value to return in case of error
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@return integer
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This function queries a dictionary for a key. A key as read from an
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ini file is given as "section:key". If the key cannot be found,
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the notfound value is returned.
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Supported values for integers include the usual C notation
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so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
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are supported. Examples:
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"42" -> 42
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"042" -> 34 (octal -> decimal)
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"0x42" -> 66 (hexa -> decimal)
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Warning: the conversion may overflow in various ways. Conversion is
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totally outsourced to strtol(), see the associated man page for overflow
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handling.
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Credits: Thanks to A. Becker for suggesting strtol()
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*/
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/*--------------------------------------------------------------------------*/
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int iniparser_getint(dictionary * d, const char * key, int notfound)
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{
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char * str ;
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str = iniparser_getstring(d, key, INI_INVALID_KEY);
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if (str==INI_INVALID_KEY) return notfound ;
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return (int)strtol(str, NULL, 0);
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Get the string associated to a key, convert to a double
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@param d Dictionary to search
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@param key Key string to look for
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@param notfound Value to return in case of error
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@return double
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This function queries a dictionary for a key. A key as read from an
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ini file is given as "section:key". If the key cannot be found,
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the notfound value is returned.
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*/
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/*--------------------------------------------------------------------------*/
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double iniparser_getdouble(dictionary * d, char * key, double notfound)
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{
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char * str ;
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str = iniparser_getstring(d, key, INI_INVALID_KEY);
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if (str==INI_INVALID_KEY) return notfound ;
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return atof(str);
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Get the string associated to a key, convert to a boolean
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@param d Dictionary to search
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@param key Key string to look for
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@param notfound Value to return in case of error
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@return integer
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This function queries a dictionary for a key. A key as read from an
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ini file is given as "section:key". If the key cannot be found,
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the notfound value is returned.
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A true boolean is found if one of the following is matched:
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- A string starting with 'y'
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- A string starting with 'Y'
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- A string starting with 't'
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- A string starting with 'T'
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- A string starting with '1'
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A false boolean is found if one of the following is matched:
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- A string starting with 'n'
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- A string starting with 'N'
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- A string starting with 'f'
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- A string starting with 'F'
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- A string starting with '0'
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The notfound value returned if no boolean is identified, does not
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necessarily have to be 0 or 1.
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*/
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/*--------------------------------------------------------------------------*/
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int iniparser_getboolean(dictionary * d, const char * key, int notfound)
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{
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char * c ;
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int ret ;
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c = iniparser_getstring(d, key, INI_INVALID_KEY);
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if (c==INI_INVALID_KEY) return notfound ;
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if (c[0]=='y' || c[0]=='Y' || c[0]=='1' || c[0]=='t' || c[0]=='T') {
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ret = 1 ;
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} else if (c[0]=='n' || c[0]=='N' || c[0]=='0' || c[0]=='f' || c[0]=='F') {
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ret = 0 ;
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} else {
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ret = notfound ;
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}
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return ret;
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}
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/*-------------------------------------------------------------------------*/
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/**
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@brief Finds out if a given entry exists in a dictionary
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@param ini Dictionary to search
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@param entry Name of the entry to look for
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@return integer 1 if entry exists, 0 otherwise
|
||
|
|
|
||
|
|
Finds out if a given entry exists in the dictionary. Since sections
|
||
|
|
are stored as keys with NULL associated values, this is the only way
|
||
|
|
of querying for the presence of sections in a dictionary.
|
||
|
|
*/
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
int iniparser_find_entry(
|
||
|
|
dictionary * ini,
|
||
|
|
char * entry
|
||
|
|
)
|
||
|
|
{
|
||
|
|
int found=0 ;
|
||
|
|
if (iniparser_getstring(ini, entry, INI_INVALID_KEY)!=INI_INVALID_KEY) {
|
||
|
|
found = 1 ;
|
||
|
|
}
|
||
|
|
return found ;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
/**
|
||
|
|
@brief Set an entry in a dictionary.
|
||
|
|
@param ini Dictionary to modify.
|
||
|
|
@param entry Entry to modify (entry name)
|
||
|
|
@param val New value to associate to the entry.
|
||
|
|
@return int 0 if Ok, -1 otherwise.
|
||
|
|
|
||
|
|
If the given entry can be found in the dictionary, it is modified to
|
||
|
|
contain the provided value. If it cannot be found, -1 is returned.
|
||
|
|
It is Ok to set val to NULL.
|
||
|
|
*/
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
int iniparser_set(dictionary * ini, char * entry, char * val)
|
||
|
|
{
|
||
|
|
return dictionary_set(ini, strlwc(entry), val) ;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
/**
|
||
|
|
@brief Delete an entry in a dictionary
|
||
|
|
@param ini Dictionary to modify
|
||
|
|
@param entry Entry to delete (entry name)
|
||
|
|
@return void
|
||
|
|
|
||
|
|
If the given entry can be found, it is deleted from the dictionary.
|
||
|
|
*/
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
void iniparser_unset(dictionary * ini, char * entry)
|
||
|
|
{
|
||
|
|
dictionary_unset(ini, strlwc(entry));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
/**
|
||
|
|
@brief Load a single line from an INI file
|
||
|
|
@param input_line Input line, may be concatenated multi-line input
|
||
|
|
@param section Output space to store section
|
||
|
|
@param key Output space to store key
|
||
|
|
@param value Output space to store value
|
||
|
|
@return line_status value
|
||
|
|
*/
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
static line_status iniparser_line(
|
||
|
|
char * input_line,
|
||
|
|
char * section,
|
||
|
|
char * key,
|
||
|
|
char * value)
|
||
|
|
{
|
||
|
|
line_status sta ;
|
||
|
|
char line[ASCIILINESZ+1];
|
||
|
|
int len ;
|
||
|
|
|
||
|
|
strcpy(line, strstrip(input_line));
|
||
|
|
len = (int)strlen(line);
|
||
|
|
|
||
|
|
sta = LINE_UNPROCESSED ;
|
||
|
|
if (len<1) {
|
||
|
|
/* Empty line */
|
||
|
|
sta = LINE_EMPTY ;
|
||
|
|
} else if (line[0]=='#') {
|
||
|
|
/* Comment line */
|
||
|
|
sta = LINE_COMMENT ;
|
||
|
|
} else if (line[0]=='[' && line[len-1]==']') {
|
||
|
|
/* Section name */
|
||
|
|
sscanf(line, "[%[^]]", section);
|
||
|
|
strcpy(section, strstrip(section));
|
||
|
|
strcpy(section, strlwc(section));
|
||
|
|
sta = LINE_SECTION ;
|
||
|
|
} else if (sscanf (line, "%[^=] = \"%[^\"]\"", key, value) == 2
|
||
|
|
|| sscanf (line, "%[^=] = '%[^\']'", key, value) == 2
|
||
|
|
|| sscanf (line, "%[^=] = %[^;#]", key, value) == 2) {
|
||
|
|
/* Usual key=value, with or without comments */
|
||
|
|
strcpy(key, strstrip(key));
|
||
|
|
strcpy(key, strlwc(key));
|
||
|
|
strcpy(value, strstrip(value));
|
||
|
|
/*
|
||
|
|
* sscanf cannot handle '' or "" as empty values
|
||
|
|
* this is done here
|
||
|
|
*/
|
||
|
|
if (!strcmp(value, "\"\"") || (!strcmp(value, "''"))) {
|
||
|
|
value[0]=0 ;
|
||
|
|
}
|
||
|
|
sta = LINE_VALUE ;
|
||
|
|
} else if (sscanf(line, "%[^=] = %[;#]", key, value)==2
|
||
|
|
|| sscanf(line, "%[^=] %[=]", key, value) == 2) {
|
||
|
|
/*
|
||
|
|
* Special cases:
|
||
|
|
* key=
|
||
|
|
* key=;
|
||
|
|
* key=#
|
||
|
|
*/
|
||
|
|
strcpy(key, strstrip(key));
|
||
|
|
strcpy(key, strlwc(key));
|
||
|
|
value[0]=0 ;
|
||
|
|
sta = LINE_VALUE ;
|
||
|
|
} else {
|
||
|
|
/* Generate syntax error */
|
||
|
|
sta = LINE_ERROR ;
|
||
|
|
}
|
||
|
|
return sta ;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
/**
|
||
|
|
@brief Parse an ini file and return an allocated dictionary object
|
||
|
|
@param ininame Name of the ini file to read.
|
||
|
|
@return Pointer to newly allocated dictionary
|
||
|
|
|
||
|
|
This is the parser for ini files. This function is called, providing
|
||
|
|
the name of the file to be read. It returns a dictionary object that
|
||
|
|
should not be accessed directly, but through accessor functions
|
||
|
|
instead.
|
||
|
|
|
||
|
|
The returned dictionary must be freed using iniparser_freedict().
|
||
|
|
*/
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
dictionary * iniparser_load(const char * ininame)
|
||
|
|
{
|
||
|
|
FILE * in ;
|
||
|
|
|
||
|
|
char line [ASCIILINESZ+1] ;
|
||
|
|
char section [ASCIILINESZ+1] ;
|
||
|
|
char key [ASCIILINESZ+1] ;
|
||
|
|
char tmp [ASCIILINESZ+1] ;
|
||
|
|
char val [ASCIILINESZ+1] ;
|
||
|
|
|
||
|
|
int last=0 ;
|
||
|
|
int len ;
|
||
|
|
int lineno=0 ;
|
||
|
|
int errs=0;
|
||
|
|
|
||
|
|
dictionary * dict ;
|
||
|
|
|
||
|
|
if ((in=fopen(ininame, "r"))==NULL) {
|
||
|
|
fprintf(stderr, "iniparser: cannot open %s\n", ininame);
|
||
|
|
return NULL ;
|
||
|
|
}
|
||
|
|
|
||
|
|
dict = dictionary_new(0) ;
|
||
|
|
if (!dict) {
|
||
|
|
fclose(in);
|
||
|
|
return NULL ;
|
||
|
|
}
|
||
|
|
|
||
|
|
memset(line, 0, ASCIILINESZ);
|
||
|
|
memset(section, 0, ASCIILINESZ);
|
||
|
|
memset(key, 0, ASCIILINESZ);
|
||
|
|
memset(val, 0, ASCIILINESZ);
|
||
|
|
last=0 ;
|
||
|
|
|
||
|
|
while (fgets(line+last, ASCIILINESZ-last, in)!=NULL) {
|
||
|
|
lineno++ ;
|
||
|
|
len = (int)strlen(line)-1;
|
||
|
|
/* Safety check against buffer overflows */
|
||
|
|
if (line[len]!='\n') {
|
||
|
|
fprintf(stderr,
|
||
|
|
"iniparser: input line too long in %s (%d)\n",
|
||
|
|
ininame,
|
||
|
|
lineno);
|
||
|
|
dictionary_del(dict);
|
||
|
|
fclose(in);
|
||
|
|
return NULL ;
|
||
|
|
}
|
||
|
|
/* Get rid of \n and spaces at end of line */
|
||
|
|
while ((len>=0) &&
|
||
|
|
((line[len]=='\n') || (isspace(line[len])))) {
|
||
|
|
line[len]=0 ;
|
||
|
|
len-- ;
|
||
|
|
}
|
||
|
|
/* Detect multi-line */
|
||
|
|
if (line[len]=='\\') {
|
||
|
|
/* Multi-line value */
|
||
|
|
last=len ;
|
||
|
|
continue ;
|
||
|
|
} else {
|
||
|
|
last=0 ;
|
||
|
|
}
|
||
|
|
switch (iniparser_line(line, section, key, val)) {
|
||
|
|
case LINE_EMPTY:
|
||
|
|
case LINE_COMMENT:
|
||
|
|
break ;
|
||
|
|
|
||
|
|
case LINE_SECTION:
|
||
|
|
errs = dictionary_set(dict, section, NULL);
|
||
|
|
break ;
|
||
|
|
|
||
|
|
case LINE_VALUE:
|
||
|
|
sprintf(tmp, "%s:%s", section, key);
|
||
|
|
errs = dictionary_set(dict, tmp, val) ;
|
||
|
|
break ;
|
||
|
|
|
||
|
|
case LINE_ERROR:
|
||
|
|
fprintf(stderr, "iniparser: syntax error in %s (%d):\n",
|
||
|
|
ininame,
|
||
|
|
lineno);
|
||
|
|
fprintf(stderr, "-> %s\n", line);
|
||
|
|
errs++ ;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break ;
|
||
|
|
}
|
||
|
|
memset(line, 0, ASCIILINESZ);
|
||
|
|
last=0;
|
||
|
|
if (errs<0) {
|
||
|
|
fprintf(stderr, "iniparser: memory allocation failure\n");
|
||
|
|
break ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (errs) {
|
||
|
|
dictionary_del(dict);
|
||
|
|
dict = NULL ;
|
||
|
|
}
|
||
|
|
fclose(in);
|
||
|
|
return dict ;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
/**
|
||
|
|
@brief Free all memory associated to an ini dictionary
|
||
|
|
@param d Dictionary to free
|
||
|
|
@return void
|
||
|
|
|
||
|
|
Free all memory associated to an ini dictionary.
|
||
|
|
It is mandatory to call this function before the dictionary object
|
||
|
|
gets out of the current context.
|
||
|
|
*/
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
void iniparser_freedict(dictionary * d)
|
||
|
|
{
|
||
|
|
dictionary_del(d);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* vim: set ts=4 et sw=4 tw=75 */
|