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/* stolen from TGT, here is the original header: */
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/* ----------------------------------------------------------------------------
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** config.c Configuration file reading routines
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** ----------------------------------------------------------------------------
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** TGT TextGUIToolkit Library
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** Copyright (C) 2000-2001 Mateusz Golicz and Tomasz Sterna
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**
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** LGPL license
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**
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** ----------------------------------------------------------------------------
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** MAINTAINER Mateusz Golicz
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**
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** Log:
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** - cleanup
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**
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*/
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#include <pwd.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <unistd.h>
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#include "inifile.h"
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int isblank (int c); /* does not appear in my libc includes !! */
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static int ini_conf_hash(char *str)
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{
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int i,l,r;
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for(i=0,l=strlen(str),r=0;i<l;i++) r=(r << 1) + str[i];
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return(r % HASH_SIZE);
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}
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/*
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*
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* ini_get_conf: Get a configuration variable from given config object
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*
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*/
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char* ini_get_conf(struct ini_prefs *prefs, /* Config object */
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char *section, /* Section name */
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char *key, /* Key name */
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char *def) /* What to return if not found in file ? */
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{
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struct ini_section * sec;
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struct ini_value * pair;
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int k;
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if(!prefs) return(def); /* We do not have any config object ! */
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k=ini_conf_hash(section);
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for(sec=prefs->sections[k];sec!=NULL;sec=sec->next)
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if(strcmp(section,sec->name)==0) break; /* look for section of given name */
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if(!sec) return(def); /* there is no such section */
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k=ini_conf_hash(key);
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for(pair=sec->pairs[k];pair!=NULL;pair=pair->next)
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if(strcmp(key,pair->key)==0) break; /* look for key of given name */
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if(!pair) return(def); /* there is no such key */
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return(pair->string); /* return value associated with that key */
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}
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/*
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*
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* ini_set_conf: Set a configuration variable in given config object
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*
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*/
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int ini_set_conf(struct ini_prefs *prefs,
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char* section,
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char* key,
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char* value)
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{
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int k,ret,i;
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struct ini_section *sec;
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struct ini_value *pair;
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k=ini_conf_hash(section); ret=0;
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for(sec=prefs->sections[k];sec!=NULL;sec=sec->next)
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if(strcmp(section,sec->name)==0) break;
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/* look for given section */
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if(!sec) /* no such section .. */
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{
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// ret|=CONF_NOTICE_NOSUCHSECTION; /* notify the caller, that it had to be created */
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sec=(struct ini_section*) malloc(sizeof(struct ini_section));
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sec->name=strdup(section); /* copy the section name */
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for(i=0;i<HASH_SIZE;i++) sec->pairs[i]=NULL; /* zero its items hash table */
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sec->next=prefs->sections[k]; /* link into list */
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prefs->sections[k]=sec;
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}
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k=ini_conf_hash(key);
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for(pair=sec->pairs[k];pair!=NULL;pair=pair->next)
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if(strcmp(key,pair->key)==0) break;
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/* look for given key */
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if(!pair) /* no such key .. */
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{
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// ret|=CONF_NOTICE_NOSUCHKEY; /* notify the caller */
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pair=(struct ini_value*) malloc(sizeof(struct ini_value));
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pair->key=strdup(key); /* copy the key name */
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pair->next=sec->pairs[k];
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sec->pairs[k]=pair; /* link it into list */
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}
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else
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free(pair->string); /* free old value */
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pair->string=strdup(value); /* copy new key value */
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return(ret); /* return status */
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}
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/*
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*
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* ini_reparse: Change weird characters in string to escape/special sequences
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*
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*/
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unsigned char *ini_reparse(unsigned char *string)
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{
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unsigned char *ret;
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unsigned char c,d,e;
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int l,i,k;
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l=strlen(string);
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ret=(unsigned char*) malloc(l*4+2); /* in the worst case we'll need so much */
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for(i=0,k=0;i<l;i++) /* foreach character in string */
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{
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c=string[i];
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if(!isprint(c)) /* it's nonprintable */
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{
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d=c >> 4; e=c & 0xf; /* change it to hex digits */
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if(d<10) d+='0'; else d=d+'a'-10;
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if(e<10) e+='0'; else e=e+'a'-10; /* and transform to ascii */
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ret[k++]='\\'; ret[k++]='x'; ret[k++]=d; ret[k++]=e;
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/* write the sequence to the final string */
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}
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else
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{
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if(c=='\\' || c=='"') /* it's a special character */
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{
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ret[k++]='\\'; ret[k++]=c; /* escape it with \ and write into the final string */
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}
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else
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ret[k++]=c; /* leave it alone */
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}
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}
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ret[k++]=0;
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ret=(char*) realloc(ret, k);
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return(ret);
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}
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/*
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*
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* ini_parse: Process special sequences in strings (\ and \x..)
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*
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*/
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unsigned char *ini_parse(unsigned char *string,int *length,unsigned char terminator)
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{
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unsigned char *out;
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unsigned char c,d,e;
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int i,k;
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out=(char*) malloc(strlen(string)); k=0; /* in the worst case we'll need so much */
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for(i=0;string[i]!=0;i++) /* foreach character in string */
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{
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if(string[i]=='\\') /* is it '\' ? */
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{
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c=string[i+1]; /* get next character .. */
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if(!c) continue; /* if it's end of string, forget that */
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if(c=='n')
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{
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out[k++] = '\n'; i++;
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continue;
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}
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if(c=='x') /* x - means hexadecimal code of character */
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{
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if((d=string[i+2])) /* get first hex digit */
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{
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if((e=string[i+3])) /* get second hex digit */
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{
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if(d>='a' && d<='f') d=d-'a'+10; else d-='0';
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if(e>='a' && e<='f') e=e-'a'+10; else e-='0';
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out[k++]=d << 4 | e; /* calculate character code and write into final string */
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i+=3; /* x<hex_digit><hex_digit> */
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continue;
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}
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}
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}
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out[k++]=c; i++; /* just an escaped character */
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}
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else
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{
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if(string[i]==terminator) break; /* we reached end of string */
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out[k++]=string[i]; /* add that end marker to final string */
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}
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}
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out[k]=0;
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if(length) *length=i;
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return(out);
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}
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/*
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*
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* ini_compresstr: Remove spaces from string
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*
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*/
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char * ini_compressstr(char *a)
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{
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int i,k,l;
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char *ret;
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ret=(char*) malloc(l=strlen(a));
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for(i=0,k=0;i<l;i++) if(!isspace(a[i])) ret[k++]=a[i];
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ret[k]=0;
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ret=(char*) realloc(ret,k+1);
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return(ret);
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}
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/*
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*
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* ini_unload_conf: Free all memory associated with internal config file structures
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*
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*/
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void ini_unload_conf(struct ini_prefs * prefs)
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{
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int i,j;
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struct ini_section *a,*p;
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struct ini_value *b,*q;
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for(i=0;i<HASH_SIZE;i++)
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{
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for(a=prefs->sections[i];a;a=p)
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{
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for(j=0;j<HASH_SIZE;j++)
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{
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for(b=a->pairs[j];b;b=q)
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{
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q=b->next;
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free(b->key);
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free(b->string);
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free(b);
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}
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}
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p=a->next;
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free(a->name);
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free(a);
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}
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}
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free(prefs);
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}
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/*
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*
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* ini_save_conf: Save internal config file structures into a real file
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*
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*/
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int ini_save_conf(struct ini_prefs * prefs,char *filename)
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{
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int i,j;
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char *str;
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FILE *fh;
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struct ini_section *a;
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struct ini_value *b;
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if(!(fh=fopen(filename,"w"))) return(0);
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fprintf(fh,"# Auto-generated by config.o/libtgt.so , Written 2000-2001 by Tomasz Sterna & Mateusz Golicz\n");
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/* write copyright */
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for(i=0;i<HASH_SIZE;i++)
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for(a=prefs->sections[i];a;a=a->next)
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{
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fprintf(fh,"[%s]\n",a->name); /* Section name */
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for(j=0;j<HASH_SIZE;j++)
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for(b=a->pairs[j];b;b=b->next) /* foreach pair */
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{
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fprintf(fh,"%s = \"%s\"\n",b->key,str=ini_reparse(b->string));
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free(str);
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}
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}
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fclose(fh);
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return(1);
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}
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/*
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*
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* ini_load_conf: Load configuration file and store it in internal structures
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*
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*/
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struct ini_prefs * ini_load_conf(char *name)
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{
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FILE *fh;
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char *file,*mem,*hdir;
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struct ini_prefs *ret;
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int i,size,seclen,keylen,l;
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char *section;
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char *value,*key;
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struct passwd *pentry;
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ret=(struct ini_prefs*) malloc(sizeof(struct ini_prefs)); /* allocate global object */
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for(i=0;i<HASH_SIZE;i++) ret->sections[i]=NULL; /* and clean it's Section Hash Table */
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if(!(fh=fopen(name,"r"))) /* try opening the file in cwd */
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if(!fh) { free(ret); return(NULL); }
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fseek(fh,0,SEEK_END); size=ftell(fh); rewind(fh); /* get file size */
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mem=file=(char*) malloc(size+1); file[size]=0;
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fread(file,size,1,fh); /* load whole file into memory */
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fclose(fh); /* and close it */
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section=strdup("main"); /* the name of current section */
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for(;;) /* parse loop */
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{
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for(;isblank(*file) || *file=='\n' || *file=='\r';file++);
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/* skip all white spaces / enters */
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if(!(*file)) break; /* EOF ? */
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if(*file=='#' || *file==';')
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{
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if(!(file=index(file,'\n'))) break; /* a comment, skip to EOL */
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continue;
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}
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if(*file=='[') /* New section */
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{
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for(seclen=0;file[seclen]!=']' && file[seclen]!=0;seclen++); /* get section length */
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if(!(file[seclen]))
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{
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fprintf(stderr,"ini_load_conf(): Parse error: unable to find matching ']'\n");
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break;
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}
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if(section) free(section); /* free old section name */
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section=(char*) malloc(seclen);
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snprintf(section,seclen,"%s",file+1); /* compose new one ...*/
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file+=seclen+1;
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continue;
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}
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/* it's an assignement then */
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for(keylen=0;file[keylen]!='=' && file[keylen]!=0;keylen++);
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/* get the length of everything before '=' ... */
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if(file[keylen]==0) break; /* eof ? */
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key=file; key[keylen]=0; file+=keylen+1; /* make a key string */
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for(;isblank(*file);file++); /* skip all spaces after = */
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if(*file=='"') /* quoted string */
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{
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int vl;
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value=ini_parse(file+1,&l,'"'); /* find matching " and fetch that string */
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if(file[1]==0 || file[2]==0) break;
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file+=l+2;
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}
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else
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{
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value=ini_parse(file,&l,'\n'); /* if it's not quoted, then skip to EOL */
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file+=l;
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}
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key=ini_compressstr(key); /* remove spaces in string before = */
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ini_set_conf(ret,section,key,value); /* and pass it as a key to setconf function */
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free(value); free(key); /* free temporary strings */
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}
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free(mem); free(section); /* clean up */
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return(ret);
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}
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