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/*
Copyright 2013 Michael Pavone
This file is part of BlastEm.
BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
*/
#include "tern.h"
#include "util.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __MINGW64_VERSION_MAJOR
#define MINGW_W64_VERSION (__MINGW64_VERSION_MAJOR * 1000 + __MINGW64_VERSION_MINOR)
#else
#define MINGW_W64_VERSION 0
#endif
#if defined(_WIN32) && (MINGW_W64_VERSION < 3003)
char * strtok_r(char * input, char * sep, char ** state)
{
if (input) {
*state = input;
}
char * ret = *state;
while (**state && **state != *sep)
{
++*state;
}
if (**state)
{
**state = 0;
++*state;
return ret;
}
return NULL;
}
#endif
tern_node * parse_config_int(char **state, int started, int *line)
{
char *config_data, *curline;
tern_node * head = NULL;
config_data = started ? NULL : *state;
while ((curline = strtok_r(config_data, "\n", state)))
{
config_data = NULL;
curline = strip_ws(curline);
int len = strlen(curline);
if (!len) {
*line = *line + 1;
continue;
}
if (curline[0] == '#') {
*line = *line + 1;
continue;
}
if (curline[0] == '}') {
if (started) {
return head;
}
fatal_error("unexpected } on line %d\n", *line);
}
char * end = curline + len - 1;
if (*end == '{') {
*end = 0;
curline = strip_ws(curline);
*line = *line + 1;
head = tern_insert_node(head, curline, parse_config_int(state, 1, line));
} else {
char * val = strip_ws(split_keyval(curline));
char * key = curline;
if (*val) {
head = tern_insert_ptr(head, key, strdup(val));
} else {
fprintf(stderr, "Key %s is missing a value on line %d\n", key, *line);
}
*line = *line + 1;
}
}
return head;
}
tern_node *parse_config(char * config_data)
{
int line = 1;
return parse_config_int(&config_data, 0, &line);
}
tern_node *parse_config_file(char *config_path)
{
tern_node * ret = NULL;
FILE * config_file = fopen(config_path, "rb");
if (!config_file) {
goto open_fail;
}
long config_size = file_size(config_file);
if (!config_size) {
goto config_empty;
}
char * config_data = malloc(config_size+1);
if (fread(config_data, 1, config_size, config_file) != config_size) {
goto config_read_fail;
}
config_data[config_size] = '\0';
ret = parse_config(config_data);
config_read_fail:
free(config_data);
config_empty:
fclose(config_file);
open_fail:
return ret;
}
tern_node *parse_bundled_config(char *config_name)
{
uint32_t confsize;
char *confdata = read_bundled_file(config_name, &confsize);
tern_node *ret = NULL;
if (confdata) {
confdata[confsize] = 0;
ret = parse_config(confdata);
free(confdata);
}
return ret;
}
tern_node *load_config()
{
char const *confdir = get_config_dir();
char *confpath = NULL;
tern_node *ret;
if (confdir) {
confpath = alloc_concat(confdir, "/blastem.cfg");
ret = parse_config_file(confpath);
if (ret) {
free(confpath);
return ret;
}
}
ret = parse_bundled_config("default.cfg");
if (ret) {
free(confpath);
return ret;
}
if (confpath) {
fatal_error("Failed to find a config file at %s or in the blastem executable directory\n", confpath);
} else {
fatal_error("Failed to find a config file in the BlastEm executable directory and the config directory path could not be determined\n");
}
//this will never get reached, but the compiler doesn't know that. Let's make it happy
return NULL;
}
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