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Merge pull request #330 from retro-wertz/libretro_updates
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Libretro : cheat updates and tubo buttons
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@ZachBacon
ZachBacon committed Dec 3, 2018
2 parents 36e412d + ca56ccf commit 16ccad0
Showing 1 changed file with 131 additions and 98 deletions.
229 changes: 131 additions & 98 deletions src/libretro/libretro.cpp
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@@ -1,4 +1,3 @@
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
Expand Down Expand Up @@ -36,8 +35,6 @@
#define RETRO_DEVICE_GBA_ALT1 RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 1)
#define RETRO_DEVICE_GBA_ALT2 RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 2)

#define ISHEXDEC ((codeLine[cursor]>='0') && (codeLine[cursor]<='9')) || ((codeLine[cursor]>='a') && (codeLine[cursor]<='f')) || ((codeLine[cursor]>='A') && (codeLine[cursor]<='F'))

static retro_log_printf_t log_cb;
static retro_video_refresh_t video_cb;
static retro_input_poll_t poll_cb;
Expand Down Expand Up @@ -409,6 +406,8 @@ void retro_set_environment(retro_environment_t cb)
{ "vbam_soundfiltering", "Sound Filtering; 5|6|7|8|9|10|0|1|2|3|4" },
{ "vbam_gbHardware", "(GB) Emulated Hardware; Automatic|Game Boy Color|Super Game Boy|Game Boy|Game Boy Advance|Super Game Boy 2" },
{ "vbam_showborders", "(GB) Show Borders; disabled|enabled|auto" },
{ "vbam_turboenable", "Enable Turbo Buttons; disabled|enabled" },
{ "vbam_turbodelay", "Turbo Delay (in frames); 3|4|5|6|7|8|9|10|11|12|13|14|15|1|2" },
{ "vbam_layer_1", "Show layer 1; enabled|disabled" },
{ "vbam_layer_2", "Show layer 2; enabled|disabled" },
{ "vbam_layer_3", "Show layer 3; enabled|disabled" },
Expand Down Expand Up @@ -887,6 +886,27 @@ static const unsigned binds[4][MAX_BUTTONS] = {
}
};

#define TURBO_BUTTONS 2
static bool turbo_enable = false;
static int turbo_delay = 3;
static int turbo_delay_counter[TURBO_BUTTONS] = {0};

static const unsigned turbo_binds[4][TURBO_BUTTONS] = {
{ 0, 0 }, // placeholder for no input
{
RETRO_DEVICE_ID_JOYPAD_X,
RETRO_DEVICE_ID_JOYPAD_Y
},
{
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_X
},
{
RETRO_DEVICE_ID_JOYPAD_Y,
RETRO_DEVICE_ID_JOYPAD_X
}
};

static void systemGbBorderOff(void);
static void systemUpdateSolarSensor(int level);
static uint8_t sensorDarkness = 0xE8;
Expand Down Expand Up @@ -1015,6 +1035,21 @@ static void update_variables(void)
else if (strcmp(var.value, "Super Game Boy 2") == 0)
gbEmulatorType = 5;
}

var.key = "vbam_turboenable";

if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
bool val = !strcmp(var.value, "enabled");
turbo_enable = val;
}

var.key = "vbam_turbodelay";

if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
turbo_delay = atoi(var.value);
}
}

static unsigned has_frame;
Expand Down Expand Up @@ -1079,107 +1114,81 @@ void retro_cheat_reset(void)
{
cheatsEnabled = 1;
if (type == IMAGE_GBA)
cheatsDeleteAll(false);
else if (type == IMAGE_GB)
cheatsDeleteAll(false);
else if (type == IMAGE_GB)
gbCheatRemoveAll();
}

#define ISHEXDEC \
((code[cursor] >= '0') && (code[cursor] <= '9')) || \
((code[cursor] >= 'a') && (code[cursor] <= 'f')) || \
((code[cursor] >= 'A') && (code[cursor] <= 'F')) || \
(code[cursor] == '-') \

void retro_cheat_set(unsigned index, bool enabled, const char* code)
{
/*
const char *begin, *c;
begin = c = code;
// 2018-11-30 - retrowertz
// added support GB/GBC multiline 6/9 digit Game Genie codes and Game Shark

if (!code)
return;
do {
if (*c != '+' && *c != '\0')
continue;
char buf[32] = {0};
int len = c - begin;
int i;
// make sure it's using uppercase letters
for (i = 0; i < len; i++)
buf[i] = toupper(begin[i]);
buf[i] = 0;
begin = ++c;
char name[128] = {0};
unsigned cursor = 0;
char *codeLine = NULL;
int codeLineSize = strlen(code) + 5;
int codePos = 0;
int i = 0;

if (len == 16)
cheatsAddGSACode(buf, "", false);
else {
char *space = strrchr(buf, ' ');
if (space != NULL) {
if ((buf + len - space - 1) == 4)
cheatsAddCBACode(buf, "");
else {
memmove(space, space+1, strlen(space+1)+1);
cheatsAddGSACode(buf, "", true);
}
} else if (log_cb)
log_cb(RETRO_LOG_ERROR, "[VBA] Invalid cheat code '%s'\n", buf);
}
} while (*c++);
*/

std::string codeLine = code;
std::string name = "cheat_" + index;
int matchLength = 0;
std::vector<std::string> codeParts;
int cursor;

if (type == IMAGE_GBA) {
//Break the code into Parts
for (cursor = 0;; cursor++) {
if (ISHEXDEC)
matchLength++;
else {
if (matchLength) {
if (matchLength > 8) {
codeParts.push_back(codeLine.substr(cursor - matchLength, 8));
codeParts.push_back(codeLine.substr(cursor - matchLength + 8, matchLength - 8));
} else
codeParts.push_back(codeLine.substr(cursor - matchLength, matchLength));
matchLength = 0;
codeLine = (char *)calloc(codeLineSize, sizeof(char));
sprintf(name, "cheat_%d", index);
for (cursor = 0;; cursor++) {
if (ISHEXDEC) {
codeLine[codePos++] = toupper(code[cursor]);
} else {
switch (type) {
case IMAGE_GB:
if (codePos >= 7) {
if (codePos == 7 || codePos == 11) {
codeLine[codePos] = '\0';
if (gbAddGgCheat(codeLine, name))
log("Cheat code added: '%s'\n", codeLine);
} else if (codePos == 8) {
codeLine[codePos] = '\0';
if (gbAddGsCheat(codeLine, name))
log("Cheat code added: '%s'\n", codeLine);
} else {
codeLine[codePos] = '\0';
log("Invalid cheat code '%s'\n", codeLine);
}
codePos = 0;
memset(codeLine, 0, codeLineSize);
}
break;
case IMAGE_GBA:
if (codePos >= 12) {
if (codePos == 12 ) {
for (i = 0; i < 4 ; i++)
codeLine[codePos - i] = codeLine[(codePos - i) - 1];
codeLine[8] = ' ';
codeLine[13] = '\0';
cheatsAddCBACode(codeLine, name);
log("Cheat code added: '%s'\n", codeLine);
} else if (codePos == 16) {
codeLine[16] = '\0';
cheatsAddGSACode(codeLine, name, true);
log("Cheat code added: '%s'\n", codeLine);
} else {
codeLine[codePos] = '\0';
log("Invalid cheat code '%s'\n", codeLine);
}
codePos = 0;
memset(codeLine, 0, codeLineSize);
}
}
if (!codeLine[cursor])
break;
}

//Add to core
for (cursor = 0; cursor < codeParts.size(); cursor += 2) {
std::string codeString;
codeString += codeParts[cursor];

if (codeParts[cursor + 1].length() == 8) {
codeString += codeParts[cursor + 1];
cheatsAddGSACode(codeString.c_str(), name.c_str(), true);
} else if (codeParts[cursor + 1].length() == 4) {
codeString += " ";
codeString += codeParts[cursor + 1];
cheatsAddCBACode(codeString.c_str(), name.c_str());
} else {
codeString += " ";
codeString += codeParts[cursor + 1];
log_cb(RETRO_LOG_ERROR, "Invalid cheat code '%s'\n", codeString.c_str());
}
log_cb(RETRO_LOG_INFO, "Cheat code added: '%s'\n", codeString.c_str());
}
} else if (type == IMAGE_GB) {
if (codeLine.find("-") != std::string::npos) {
if (gbAddGgCheat(code, ""))
log_cb(RETRO_LOG_INFO, "Cheat code added: '%s'\n", codeLine.c_str());
} else {
if (gbAddGsCheat(code, ""))
log_cb(RETRO_LOG_INFO, "Cheat code added: '%s'\n", codeLine.c_str());
if (!code[cursor])
break;
}
}
free(codeLine);
}

static void update_input_descriptors(void)
Expand All @@ -1193,6 +1202,8 @@ static void update_input_descriptors(void)
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "Turbo B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Turbo A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "Solar Sensor (Darker)" },
Expand All @@ -1210,6 +1221,8 @@ static void update_input_descriptors(void)
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Turbo B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Turbo A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "Solar Sensor (Darker)" },
Expand All @@ -1227,6 +1240,8 @@ static void update_input_descriptors(void)
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Turbo B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "Turbo A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "Solar Sensor (Darker)" },
Expand Down Expand Up @@ -1346,10 +1361,10 @@ bool retro_load_game(const struct retro_game_info *game)
desc[5].len = 0x00a0;

// http://gameboy.mongenel.com/dmg/asmmemmap.html
// $4000-$7FFF Cartridge ROM - Switchable Banks 1-xx
// $0150-$3FFF Cartridge ROM - Bank 0 (fixed)
// $0100-$014F Cartridge Header Area
// $0000-$00FF Restart and Interrupt Vectors
// $4000-$7FFF Cartridge ROM - Switchable Banks 1-xx
// $0150-$3FFF Cartridge ROM - Bank 0 (fixed)
// $0100-$014F Cartridge Header Area
// $0000-$00FF Restart and Interrupt Vectors
desc[6].ptr = gbMemoryMap[0x00];
desc[6].start = 0x0000;
desc[6].len = 0x4000;
Expand Down Expand Up @@ -1498,10 +1513,28 @@ uint32_t systemReadJoypad(int which)

uint32_t J = 0;

if (retropad_layout)
for (unsigned i = 0; i < MAX_BUTTONS; i++)
if (retropad_layout) {
int i;
for (i = 0; i < MAX_BUTTONS; i++)
J |= input_cb(which, RETRO_DEVICE_JOYPAD, 0, binds[retropad_layout][i]) << i;

if (turbo_enable) {
/* Handle Turbo A & B buttons */
for (i = 0; i < TURBO_BUTTONS; i++) {
if (input_cb(which, RETRO_DEVICE_JOYPAD, 0, turbo_binds[retropad_layout][i])) {
if (!turbo_delay_counter[i])
J |= 1 << i;
turbo_delay_counter[i]++;
if (turbo_delay_counter[i] > turbo_delay)
/* Reset the toggle if delay value is reached */
turbo_delay_counter[i] = 0;
} else
/* If the button is not pressed, just reset the toggle */
turbo_delay_counter[i] = 0;
}
}
}

// Do not allow opposing directions
if ((J & 0x30) == 0x30)
J &= ~(0x30);
Expand Down

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