Add cheat engine.
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sorgelig
322
cheats.cpp
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322
cheats.cpp
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <limits.h>
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#include <ctype.h>
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#include <vector>
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#include <algorithm>
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#include "hardware.h"
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#include "file_io.h"
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#include "user_io.h"
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#include "fpga_io.h"
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#include "miniz_zip.h"
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#include "osd.h"
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#include "cheats.h"
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struct cheat_rec_t
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{
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char enabled;
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char name[256];
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};
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typedef std::vector<cheat_rec_t> CheatVector;
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static CheatVector cheats;
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static int iSelectedEntry = 0;
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static int iFirstEntry = 0;
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struct CheatComp
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{
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bool operator()(const cheat_rec_t& ce1, const cheat_rec_t& ce2)
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{
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int len1 = strlen(ce1.name);
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int len2 = strlen(ce2.name);
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int len = (len1 < len2) ? len1 : len2;
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int ret = strncasecmp(ce1.name, ce2.name, len);
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if (!ret)
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{
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return len1 < len2;
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}
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return ret < 0;
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}
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};
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static char cheat_zip[1024] = {};
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void cheats_init(char *rom_path)
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{
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cheats.clear();
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cheat_zip[0] = 0;
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if (!strcasestr(rom_path, ".zip"))
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{
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sprintf(cheat_zip, "%s/%s", getRootDir(), rom_path);
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char *p = strrchr(cheat_zip, '.');
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if (p) *p = 0;
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strcat(cheat_zip, ".zip");
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}
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mz_zip_archive _z = {};
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if (!mz_zip_reader_init_file(&_z, cheat_zip, 0))
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{
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memset(&_z, 0, sizeof(_z));
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char *rom_name = strrchr(rom_path, '/');
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if (!rom_name) return;
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sprintf(cheat_zip, "%s/cheats/%s%s", getRootDir(), HomeDir, rom_name);
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char *p = strrchr(cheat_zip, '.');
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if (p) *p = 0;
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strcat(cheat_zip, ".zip");
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if (!mz_zip_reader_init_file(&_z, cheat_zip, 0))
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{
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printf("no cheat file %s\n", cheat_zip);
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return;
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}
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}
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mz_zip_archive *z = new mz_zip_archive(_z);
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for (size_t i = 0; i < mz_zip_reader_get_num_files(z); i++)
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{
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cheat_rec_t ch = {};
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mz_zip_reader_get_filename(z, i, ch.name, sizeof(ch.name));
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if (mz_zip_reader_is_file_a_directory(z, i))
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{
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continue;
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}
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cheats.push_back(ch);
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}
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mz_zip_reader_end(z);
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delete z;
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std::sort(cheats.begin(), cheats.end(), CheatComp());
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printf("cheats: %d\n", cheats_available());
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cheats_scan(SCANF_INIT);
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}
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int cheats_available()
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{
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return cheats.size();
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}
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void cheats_scan(int mode)
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{
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if (mode == SCANF_INIT)
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{
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iFirstEntry = 0;
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iSelectedEntry = 0;
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}
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else
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{
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if (!cheats_available()) return;
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if (mode == SCANF_END)
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{
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iSelectedEntry = cheats_available() - 1;
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iFirstEntry = iSelectedEntry - OsdGetSize() + 1;
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if (iFirstEntry < 0) iFirstEntry = 0;
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}
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else if (mode == SCANF_NEXT)
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{
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if (iSelectedEntry + 1 < cheats_available()) // scroll within visible items
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{
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iSelectedEntry++;
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if (iSelectedEntry > iFirstEntry + OsdGetSize() - 1) iFirstEntry = iSelectedEntry - OsdGetSize() + 1;
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}
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}
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else if (mode == SCANF_PREV)
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{
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if (iSelectedEntry > 0) // scroll within visible items
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{
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iSelectedEntry--;
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if (iSelectedEntry < iFirstEntry) iFirstEntry = iSelectedEntry;
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}
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}
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else if (mode == SCANF_NEXT_PAGE)
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{
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if (iSelectedEntry < iFirstEntry + OsdGetSize() - 1)
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{
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iSelectedEntry = iFirstEntry + OsdGetSize() - 1;
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if (iSelectedEntry >= cheats_available()) iSelectedEntry = cheats_available() - 1;
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}
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else
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{
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iSelectedEntry += OsdGetSize();
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iFirstEntry += OsdGetSize();
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if (iSelectedEntry >= cheats_available())
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{
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iSelectedEntry = cheats_available() - 1;
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iFirstEntry = iSelectedEntry - OsdGetSize() + 1;
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if (iFirstEntry < 0) iFirstEntry = 0;
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}
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else if (iFirstEntry + OsdGetSize() > cheats_available())
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{
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iFirstEntry = cheats_available() - OsdGetSize();
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}
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}
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}
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else if (mode == SCANF_PREV_PAGE)
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{
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if (iSelectedEntry != iFirstEntry)
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{
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iSelectedEntry = iFirstEntry;
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}
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else
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{
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iFirstEntry -= OsdGetSize();
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if (iFirstEntry < 0) iFirstEntry = 0;
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iSelectedEntry = iFirstEntry;
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}
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}
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}
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}
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void cheats_scroll_name()
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{
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// this function is called periodically when file selection window is displayed
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// it checks if predefined period of time has elapsed and scrolls the name if necessary
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int len;
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int max_len;
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static char name[256 + 4];
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name[0] = 32;
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name[1] = cheats[iSelectedEntry].enabled ? 0x1a : 0x1b;
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name[2] = 32;
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strcpy(name + 3, cheats[iSelectedEntry].name);
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len = strlen(name); // get name length
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if (len > 3 && !strncasecmp(name + len - 3, ".gg", 3)) len -= 3;
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max_len = 30;
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ScrollText(iSelectedEntry - iFirstEntry, name, 3, len, max_len, 1);
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}
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void cheats_print()
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{
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int k;
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int len;
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static char s[256+4];
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ScrollReset();
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for (int i = 0; i < OsdGetSize(); i++)
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{
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char leftchar = 0;
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if (i < cheats_available())
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{
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k = iFirstEntry + i;
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s[0] = 32;
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s[1] = cheats[k].enabled ? 0x1a : 0x1b;
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s[2] = 32;
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strcpy(s + 3, cheats[k].name);
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len = strlen(s); // get name length
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if (len > 3 && !strncasecmp(s + len - 3, ".gg", 3)) len -= 3;
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s[len] = 0;
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if (len > 28)
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{
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len = 27; // trim display length if longer than 30 characters
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s[28] = 22;
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}
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s[29] = 0;
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if (!i && k) leftchar = 17;
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if ((i == OsdGetSize() - 1) && (k < cheats_available() - 1)) leftchar = 16;
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}
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else
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{
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memset(s, ' ', 32);
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}
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OsdWriteOffset(i, s, i == (iSelectedEntry - iFirstEntry), 0, 0, leftchar);
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}
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}
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#define CHEAT_SIZE (128*16) // 128 codes max
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static void cheats_send()
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{
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static char filename[1024];
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static uint8_t buff[CHEAT_SIZE];
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int pos = 0;
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for (int i = 0; i < cheats_available(); i++)
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{
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fileTYPE f = {};
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if (cheats[i].enabled)
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{
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sprintf(filename, "%s/%s", cheat_zip, cheats[i].name);
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if (FileOpen(&f, filename))
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{
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int len = f.size;
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if (!len || (len & 15))
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{
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printf("Cheat file %s has incorrect length %d -> skipping.", filename, len);
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}
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else
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{
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if (len + pos > CHEAT_SIZE)
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{
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len = CHEAT_SIZE - pos;
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}
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if (FileReadAdv(&f, buff + pos, len) == len)
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{
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pos += len;
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}
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else
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{
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printf("Cannot read cheat file %s.", filename);
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}
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}
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FileClose(&f);
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}
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else
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{
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printf("Cannot open cheat file %s.", filename);
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}
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}
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if (pos >= CHEAT_SIZE) break;
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}
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printf("Cheat codes: %d\n", pos/16);
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user_io_set_index(255);
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// prepare transmission
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EnableFpga();
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spi8(UIO_FILE_TX);
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spi8(0xff);
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DisableFpga();
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EnableFpga();
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spi8(UIO_FILE_TX_DAT);
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spi_write(buff, pos ? pos : 2, fpga_get_fio_size());
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DisableFpga();
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// signal end of transmission
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EnableFpga();
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spi8(UIO_FILE_TX);
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spi8(0x00);
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DisableFpga();
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}
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void cheats_toggle()
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{
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cheats[iSelectedEntry].enabled = !cheats[iSelectedEntry].enabled;
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cheats_send();
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}
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