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/* gcheat.c
*
* Copyright (C) 2012 GBAtemp user Nebuleon.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "port.h"
#include "string.h"
#include "fs_api.h"
#include "ds2_malloc.h"
#include "gcheat.h"
#include "cheats.h"
extern struct SCheatData Cheat;
// Reads a cheat text file in BSNES's format.
int NDSSFCLoadCheatFile(const char* filename)
{
FILE* fp = fopen(filename, "r");
if (fp == NULL)
return -1;
S9xDeleteCheats();
// The construction is "a","b","c" <newline>.
// a is ignored. In BSNES, it decides whether the code is enabled.
// b is a series of codes separated by +. Each of the codes is in the form
// accepted by the Game Genie, Pro Action Replay, or the GoldFinger.
// c is the cheat's description.
char line[256], code[24];
char *description, *codes_ptr;
uint32 address;
uint8 byte;
uint8 bytes [3];
bool8 sram;
uint8 num_bytes;
while (fgets(line, sizeof(line), fp))
{
char* ptr = &line[0];
// Ignore a.
while (*ptr && *ptr != ',')
ptr++;
// If there was no comma, declare a bad file.
if (*ptr == '\0') {
fclose(fp);
return -2;
}
ptr++; // Past the comma
if (*ptr && *ptr == '"')
ptr++; // Starting quote of b.
codes_ptr = ptr; // Save this for later.
while (*ptr && *ptr != ',')
ptr++;
// If there was no comma, declare a bad file.
if (*ptr == '\0') {
fclose(fp);
return -2;
}
*ptr = '\0'; // End the codes there
ptr++; // Past the comma
uint32 i = 0;
description = ptr; // Skip starting " in description
while (*description && *description == '"')
description++;
ptr = description;
while (*ptr && !(*ptr == '\r' || *ptr == '\n' || *ptr == '"') && i < MAX_SFCCHEAT_NAME - 1) {
ptr++; // Remove trailing newline/quote in description
i++; // Clip the cheat name to MAX_SFCCHEAT_NAME chars
}
*ptr = '\0';
uint32 c;
// n is the number of cheat codes. Beware of MAX_CHEATS_T.
// List of cheat codes having the same description.
ptr = codes_ptr;
while (*ptr && !(*ptr == ',' || *ptr == '"')) {
if (Cheat.num_cheats >= MAX_CHEATS_T) {
fclose(fp);
return 0;
}
i = 0;
while (*ptr && !(*ptr == '+' || *ptr == ',' || *ptr == '"') && i < sizeof(code) - 1)
code[i++] = *ptr++;
if (*ptr)
ptr++; // Go past the + , or "
code[i] = '\0';
if (!S9xGameGenieToRaw (code, &address, &byte)) {
S9xAddCheat (FALSE, FALSE, address, byte);
strncpy (Cheat.c[Cheat.num_cheats - 1].name, description, MAX_SFCCHEAT_NAME);
}
else if (!S9xProActionReplayToRaw (code, &address, &byte)) {
S9xAddCheat (FALSE, FALSE, address, byte);
strncpy (Cheat.c[Cheat.num_cheats - 1].name, description, MAX_SFCCHEAT_NAME);
}
else if (!S9xGoldFingerToRaw (code, &address, &sram, &num_bytes, bytes))
{
for (c = 0; c < num_bytes; c++) {
S9xAddCheat (FALSE, FALSE, address + c, bytes[c]);
strncpy (Cheat.c[Cheat.num_cheats - 1].name, description, MAX_SFCCHEAT_NAME);
}
}
else {
fclose(fp);
return -3; // Bad cheat format
}
}
}
fclose(fp);
return 0;
}
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