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|
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cheat.h"
#include "main.h"
#include "util.h"
#define MAX_LINE_LEN SCREEN_WIDTH / 6
#if SCREEN_WIDTH == 240
#define MAX_DESC_LEN 22
#else
#define MAX_DESC_LEN 27
#endif
#define MAX_LINES 4
static size_t parse_count(FILE *file) {
size_t count = 0;
fscanf(file, " cheats = %lu\n", (unsigned long *)&count);
return count;
}
static const char *find_val(const char *start) {
start--;
while(!isspace(*++start))
;
while(isspace(*++start))
;
if (*start != '=')
return NULL;
while(isspace(*++start))
;
return start;
}
static int parse_bool(const char *ptr, int *out) {
if (!strncasecmp(ptr, "true", 4)) {
*out = 1;
} else if (!strncasecmp(ptr, "false", 5)) {
*out = 0;
} else {
return -1;
}
return 0;
}
static int parse_string(const char *ptr, char *buf, size_t len) {
int index = 0;
size_t input_len = strlen(ptr);
buf[0] = '\0';
if (*ptr++ != '"')
return -1;
while (*ptr != '\0' && *ptr != '"' && index < len - 1) {
if (*ptr == '\\' && index < input_len - 1) {
ptr++;
buf[index++] = *ptr++;
} else if (*ptr == '&' && !strncmp(ptr, """, 6)) {
buf[index++] = '"';
ptr += 6;
} else {
buf[index++] = *ptr++;
}
}
if (*ptr != '"') {
buf[0] = '\0';
return -1;
}
buf[index] = '\0';
return 0;
}
static int parse_cheats(struct cheats *cheats, FILE *file) {
int ret = -1;
char line[512];
char buf[512];
const char *ptr;
do {
if (!fgets(line, sizeof(line), file)) {
ret = 0;
break;
}
if (line[strlen(line) - 1] != '\n' && !feof(file)) {
PA_WARN("Cheat line too long\n");
continue;
}
if ((ptr = strstr(line, "cheat"))) {
int index = -1;
struct cheat *cheat;
size_t len;
sscanf(ptr, "cheat%d", &index);
if (index >= cheats->count)
continue;
cheat = &cheats->cheats[index];
if (strstr(ptr, "_desc")) {
ptr = find_val(ptr);
if (!ptr || parse_string(ptr, buf, sizeof(buf))) {
PA_WARN("Couldn't parse cheat %d description\n", index);
continue;
}
len = strlen(buf);
if (len == 0)
continue;
cheat->name = calloc(len+1, sizeof(char));
if (!cheat->name)
goto finish;
strncpy((char *)cheat->name, buf, len);
string_truncate((char *)cheat->name, MAX_DESC_LEN);
if (len >= MAX_DESC_LEN) {
cheat->info = calloc(len+1, sizeof(char));
if (!cheat->info)
goto finish;
strncpy((char *)cheat->info, buf, len);
string_wrap((char *)cheat->info, MAX_LINE_LEN, MAX_LINES);
}
} else if (strstr(ptr, "_code")) {
ptr = find_val(ptr);
if (!ptr || parse_string(ptr, buf, sizeof(buf))) {
PA_WARN("Couldn't parse cheat %d code\n", index);
continue;
}
len = strlen(buf);
if (len == 0)
continue;
cheat->code = calloc(len+1, sizeof(char));
if (!cheat->code)
goto finish;
strncpy((char *)cheat->code, buf, len);
} else if (strstr(ptr, "_enable")) {
ptr = find_val(ptr);
if (!ptr || parse_bool(ptr, &cheat->enabled)) {
PA_WARN("Couldn't parse cheat %d enabled\n", index);
continue;
}
}
}
} while(1);
finish:
return ret;
}
struct cheats *cheats_load(const char *filename) {
int success = 0;
struct cheats *cheats = NULL;
FILE *file = NULL;
size_t i;
file = fopen(filename, "r");
if (!file)
goto finish;
PA_INFO("Loading cheats from %s\n", filename);
cheats = calloc(1, sizeof(struct cheats));
if (!cheats) {
PA_ERROR("Couldn't allocate memory for cheats\n");
goto finish;
}
cheats->count = parse_count(file);
if (cheats->count <= 0) {
PA_ERROR("Couldn't read cheat count\n");
goto finish;
}
cheats->cheats = calloc(cheats->count, sizeof(struct cheat));
if (!cheats->cheats) {
PA_ERROR("Couldn't allocate memory for cheats\n");
goto finish;
}
if (parse_cheats(cheats, file)) {
PA_ERROR("Error reading cheat %d\n", i);
goto finish;
}
success = 1;
finish:
if (!success) {
cheats_free(cheats);
cheats = NULL;
}
if (file)
fclose(file);
return cheats;
}
void cheats_free(struct cheats *cheats) {
size_t i;
if (cheats) {
for (i = 0; i < cheats->count; i++) {
struct cheat *cheat = &cheats->cheats[i];
if (cheat) {
free((char *)cheat->name);
free((char *)cheat->info);
free((char *)cheat->code);
}
}
free(cheats->cheats);
}
free(cheats);
}
|
