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/*
* config file parser
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "parseconfig.h"
struct CFG_ENTRIES {
int ent_count;
char **ent_names;
char **ent_values;
};
struct CFG_SECTIONS {
int sec_count;
char **sec_names;
struct CFG_ENTRIES **sec_entries;
};
/* ------------------------------------------------------------------------ */
static struct CFG_SECTIONS *c;
/* ------------------------------------------------------------------------ */
#define ALLOC_SIZE 16
static struct CFG_SECTIONS*
cfg_init_sections()
{
struct CFG_SECTIONS *c;
c = malloc(sizeof(struct CFG_SECTIONS));
memset(c,0,sizeof(struct CFG_SECTIONS));
c->sec_names = malloc(ALLOC_SIZE*sizeof(char*));
c->sec_names[0] = NULL;
c->sec_entries = malloc(ALLOC_SIZE*sizeof(struct CFG_ENTRIES*));
c->sec_entries[0] = NULL;
return c;
}
static struct CFG_ENTRIES*
cfg_init_entries()
{
struct CFG_ENTRIES *e;
e = malloc(sizeof(struct CFG_ENTRIES));
memset(e,0,sizeof(struct CFG_ENTRIES));
e->ent_names = malloc(ALLOC_SIZE*sizeof(char*));
e->ent_names[0] = NULL;
e->ent_values = malloc(ALLOC_SIZE*sizeof(char*));
e->ent_values[0] = NULL;
return e;
}
static struct CFG_ENTRIES*
cfg_find_section(struct CFG_SECTIONS *c, char *name)
{
struct CFG_ENTRIES* e;
int i;
for (i = 0; i < c->sec_count; i++)
if (0 == strcmp(c->sec_names[i],name))
return c->sec_entries[i];
/* 404 not found => create a new one */
if ((c->sec_count % ALLOC_SIZE) == (ALLOC_SIZE-2)) {
c->sec_names = realloc(c->sec_names,(c->sec_count+2+ALLOC_SIZE)*sizeof(char*));
c->sec_entries = realloc(c->sec_entries,(c->sec_count+2+ALLOC_SIZE)*sizeof(struct CFG_ENTRIES*));
}
e = cfg_init_entries();
c->sec_names[c->sec_count] = strdup(name);
c->sec_entries[c->sec_count] = e;
c->sec_count++;
c->sec_names[c->sec_count] = NULL;
c->sec_entries[c->sec_count] = NULL;
return e;
}
static void
cfg_set_entry(struct CFG_ENTRIES *e, char *name, char *value)
{
int i;
for (i = 0; i < e->ent_count; i++)
if (0 == strcmp(e->ent_names[i],name))
break;
if (i == e->ent_count) {
/* 404 not found => create a new one */
if ((e->ent_count % ALLOC_SIZE) == (ALLOC_SIZE-2)) {
e->ent_names = realloc(e->ent_names,(e->ent_count+2+ALLOC_SIZE)*sizeof(char*));
e->ent_values = realloc(e->ent_values,(e->ent_count+2+ALLOC_SIZE)*sizeof(char*));
}
e->ent_count++;
e->ent_names[e->ent_count] = NULL;
e->ent_values[e->ent_count] = NULL;
}
e->ent_names[i] = strdup(name);
e->ent_values[i] = strdup(value);
}
/* ------------------------------------------------------------------------ */
int
cfg_parse_file(char *filename)
{
struct CFG_ENTRIES *e = NULL;
char line[256],tag[64],value[192];
FILE *fp;
int nr;
if (NULL == c)
c = cfg_init_sections();
if (NULL == (fp = fopen(filename,"r")))
return -1;
nr = 0;
while (NULL != fgets(line,255,fp)) {
nr++;
if (line[0] == '\n' || line[0] == '#' || line[0] == '%' || line[0] ==';')
continue;
if (1 == sscanf(line,"[%99[^]]]",value)) {
/* section */
e = cfg_find_section(c,value);
} else if (2 == sscanf(line," %63[^= ] = %191[^\n]",tag,value)) {
/* foo = bar */
if (NULL == e) {
fprintf(stderr,"%s:%d: error: no section\n",filename,nr);
} else {
cfg_set_entry(e,tag,value);
}
} else {
/* Huh ? */
fprintf(stderr,"%s:%d: syntax error\n",filename,nr);
}
}
return 0;
}
/* ------------------------------------------------------------------------ */
char**
cfg_list_sections()
{
return c->sec_names;
}
char**
cfg_list_entries(char *name)
{
int i;
for (i = 0; i < c->sec_count; i++)
if (0 == strcmp(c->sec_names[i],name))
return c->sec_entries[i]->ent_names;
return NULL;
}
char*
cfg_get_str(char *sec, char *ent)
{
struct CFG_ENTRIES* e = NULL;
char *v = NULL;
int i;
for (i = 0; i < c->sec_count; i++)
if (0 == strcmp(c->sec_names[i],sec))
e = c->sec_entries[i];
if (NULL == e)
return NULL;
for (i = 0; i < e->ent_count; i++)
if (0 == strcmp(e->ent_names[i],ent))
v = e->ent_values[i];
return v;
}
int
cfg_get_int(char *sec, char *ent)
{
char *val;
val = cfg_get_str(sec,ent);
if (NULL == val)
return -1;
return atoi(val);
}
float
cfg_get_float(char *sec, char *ent)
{
char *val;
val = cfg_get_str(sec,ent);
if (NULL == val)
return -1;
return atof(val);
}
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