filetypes.c 7.3 KB

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  1. // insert cool lengthy disclaimer here
  2. #include <stdio.h>
  3. #include <string.h>
  4. #include <avr/pgmspace.h>
  5. #include <util/delay.h>
  6. #include "config.h"
  7. #include "uart.h"
  8. #include "filetypes.h"
  9. #include "ff.h"
  10. #include "smc.h"
  11. #include "fileops.h"
  12. #include "crc16.h"
  13. #include "memory.h"
  14. #include "led.h"
  15. uint16_t scan_flat(const char* path) {
  16. DIR dir;
  17. FRESULT res;
  18. FILINFO fno;
  19. fno.lfn = NULL;
  20. res = f_opendir(&dir, (unsigned char*)path);
  21. uint16_t numentries = 0;
  22. if (res == FR_OK) {
  23. for (;;) {
  24. res = f_readdir(&dir, &fno);
  25. if(res != FR_OK || fno.fname[0] == 0)break;
  26. numentries++;
  27. }
  28. }
  29. return numentries;
  30. }
  31. uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
  32. DIR dir;
  33. FILINFO fno;
  34. FRESULT res;
  35. uint8_t len;
  36. unsigned char* fn;
  37. static unsigned char depth = 0;
  38. static uint16_t crc;
  39. static uint32_t db_tgt;
  40. static uint32_t next_subdir_tgt;
  41. static uint32_t parent_tgt;
  42. static uint32_t dir_end = 0;
  43. static uint8_t was_empty = 0;
  44. uint32_t dir_tgt;
  45. uint16_t numentries;
  46. uint32_t dirsize;
  47. uint8_t pass = 0;
  48. dir_tgt = this_dir_tgt;
  49. if(depth==0) {
  50. crc = 0;
  51. db_tgt = SRAM_DB_ADDR+0x10;
  52. dir_tgt = SRAM_DIR_ADDR;
  53. next_subdir_tgt = SRAM_DIR_ADDR;
  54. this_dir_tgt = SRAM_DIR_ADDR;
  55. parent_tgt = 0;
  56. dprintf("root dir @%lx\n", dir_tgt);
  57. }
  58. fno.lfn = file_lfn;
  59. numentries=0;
  60. for(pass = 0; pass < 2; pass++) {
  61. if(pass) {
  62. dirsize = 4*(numentries);
  63. // dir_tgt_next = dir_tgt + dirsize + 4; // number of entries + end marker
  64. next_subdir_tgt += dirsize + 4;
  65. if(parent_tgt) next_subdir_tgt += 4;
  66. if(next_subdir_tgt > dir_end) {
  67. dir_end = next_subdir_tgt;
  68. }
  69. dprintf("path=%s depth=%d ptr=%lx entries=%d parent=%lx next subdir @%lx\n", path, depth, db_tgt, numentries, parent_tgt, next_subdir_tgt /*dir_tgt_next*/);
  70. // _delay_ms(50);
  71. if(mkdb) {
  72. dprintf("d=%d Saving %lX to Address %lX [end]\n", depth, 0L, next_subdir_tgt - 4);
  73. // _delay_ms(50);
  74. sram_writelong(0L, next_subdir_tgt - 4);
  75. }
  76. }
  77. res = f_opendir(&dir, (unsigned char*)path);
  78. if (res == FR_OK) {
  79. if(pass && parent_tgt) {
  80. // write backlink to parent dir
  81. // switch to next bank if record does not fit in current bank
  82. if((db_tgt&0xffff) > ((0x10000-(sizeof(next_subdir_tgt)+sizeof(len)+4))&0xffff)) {
  83. dprintf("switch! old=%lx ", db_tgt);
  84. db_tgt &= 0xffff0000;
  85. db_tgt += 0x00010000;
  86. dprintf("new=%lx\n", db_tgt);
  87. }
  88. sram_writelong(parent_tgt, db_tgt);
  89. sram_writebyte(0, db_tgt+sizeof(next_subdir_tgt));
  90. sram_writeblock("../\0", db_tgt+sizeof(next_subdir_tgt)+sizeof(len), 4);
  91. sram_writelong(db_tgt|((uint32_t)0x80<<24), dir_tgt);
  92. db_tgt += sizeof(next_subdir_tgt)+sizeof(len)+4;
  93. dir_tgt += 4;
  94. }
  95. len = strlen((char*)path);
  96. for (;;) {
  97. toggle_busy_led();
  98. res = f_readdir(&dir, &fno);
  99. if (res != FR_OK || fno.fname[0] == 0) {
  100. if(pass) {
  101. if(!numentries) was_empty=1;
  102. }
  103. break;
  104. }
  105. fn = *fno.lfn ? fno.lfn : fno.fname;
  106. // dprintf("%s\n", fn);
  107. // _delay_ms(100);
  108. if (*fn == '.') continue;
  109. if (fno.fattrib & AM_DIR) {
  110. numentries++;
  111. if(pass) {
  112. path[len]='/';
  113. strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
  114. depth++;
  115. if(mkdb) {
  116. uint16_t pathlen = strlen(path);
  117. // write element pointer to current dir structure
  118. dprintf("d=%d Saving %lX to Address %lX [dir]\n", depth, db_tgt, dir_tgt);
  119. // _delay_ms(50);
  120. sram_writelong(db_tgt|((uint32_t)0x80<<24), dir_tgt);
  121. // sram_writeblock((uint8_t*)&db_tgt, dir_tgt_save, sizeof(dir_tgt_save));
  122. // save element:
  123. // - path name
  124. // - pointer to sub dir structure
  125. if((db_tgt&0xffff) > ((0x10000-(sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2))&0xffff)) {
  126. dprintf("switch! old=%lx ", db_tgt);
  127. db_tgt &= 0xffff0000;
  128. db_tgt += 0x00010000;
  129. dprintf("new=%lx\n", db_tgt);
  130. }
  131. dprintf(" Saving dir descriptor to %lX, tgt=%lX, path=%s\n", db_tgt, next_subdir_tgt, path);
  132. // _delay_ms(100);
  133. sram_writelong(next_subdir_tgt, db_tgt);
  134. sram_writebyte(len+1, db_tgt+sizeof(next_subdir_tgt));
  135. sram_writeblock(path, db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen);
  136. sram_writeblock("/\0", db_tgt + sizeof(next_subdir_tgt) + sizeof(len) + pathlen, 2);
  137. // sram_writeblock((uint8_t*)&dir_tgt, db_tgt+256, sizeof(dir_tgt));
  138. db_tgt += sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2;
  139. }
  140. parent_tgt = this_dir_tgt;
  141. scan_dir(path, mkdb, next_subdir_tgt);
  142. dir_tgt += 4;
  143. // if(was_empty)dir_tgt_next += 4;
  144. was_empty = 0;
  145. depth--;
  146. path[len]=0;
  147. }
  148. } else {
  149. SNES_FTYPE type = determine_filetype((char*)fn);
  150. if(type != TYPE_UNKNOWN) {
  151. numentries++;
  152. if(pass) {
  153. if(mkdb) {
  154. snes_romprops_t romprops;
  155. path[len]='/';
  156. strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
  157. uint16_t pathlen = strlen(path);
  158. switch(type) {
  159. case TYPE_SMC:
  160. file_open_by_filinfo(&fno);
  161. if(file_res){
  162. dprintf("ZOMG NOOOO %d\n", file_res);
  163. _delay_ms(30);
  164. }
  165. smc_id(&romprops);
  166. file_close();
  167. // _delay_ms(30);
  168. // write element pointer to current dir structure
  169. // dprintf("d=%d Saving %lX to Address %lX [file]\n", depth, db_tgt, dir_tgt);
  170. // _delay_ms(50);
  171. if((db_tgt&0xffff) > ((0x10000-(sizeof(romprops) + sizeof(len) + pathlen + 1))&0xffff)) {
  172. dprintf("switch! old=%lx ", db_tgt);
  173. db_tgt &= 0xffff0000;
  174. db_tgt += 0x00010000;
  175. dprintf("new=%lx\n", db_tgt);
  176. }
  177. sram_writelong(db_tgt, dir_tgt);
  178. // sram_writeblock((uint8_t*)&db_tgt, dir_tgt, sizeof(db_tgt));
  179. dir_tgt += 4;
  180. // save element:
  181. // - SNES header information
  182. // - file name
  183. sram_writeblock((uint8_t*)&romprops, db_tgt, sizeof(romprops));
  184. sram_writebyte(len+1, db_tgt + sizeof(romprops));
  185. sram_writeblock(path, db_tgt + sizeof(romprops) + sizeof(len), pathlen + 1);
  186. db_tgt += sizeof(romprops) + sizeof(len) + pathlen + 1;
  187. break;
  188. case TYPE_UNKNOWN:
  189. default:
  190. break;
  191. }
  192. path[len]=0;
  193. // dprintf("%s ", path);
  194. // _delay_ms(30);
  195. }
  196. } else {
  197. unsigned char* sfn = fno.fname;
  198. while(*sfn != 0) {
  199. crc += crc16_update(crc, sfn++, 1);
  200. }
  201. }
  202. }
  203. // dprintf("%s/%s\n", path, fn);
  204. // _delay_ms(50);
  205. }
  206. }
  207. } else uart_putc(0x30+res);
  208. }
  209. // dprintf("%x\n", crc);
  210. // _delay_ms(50);
  211. sram_writeblock(&db_tgt, SRAM_DB_ADDR+4, sizeof(db_tgt));
  212. sram_writeblock(&dir_end, SRAM_DB_ADDR+8, sizeof(dir_end));
  213. return crc;
  214. }
  215. SNES_FTYPE determine_filetype(char* filename) {
  216. char* ext = strrchr(filename, '.');
  217. if(ext == NULL)
  218. return TYPE_UNKNOWN;
  219. if(!strcasecmp_P(ext+1, PSTR("SMC"))) {
  220. return TYPE_SMC;
  221. }/* later
  222. if(!strcasecmp_P(ext+1, PSTR("SRM"))) {
  223. return TYPE_SRM;
  224. }
  225. if(!strcasecmp_P(ext+1, PSTR("SPC"))) {
  226. return TYPE_SPC;
  227. }*/
  228. return TYPE_UNKNOWN;
  229. }
  230. FRESULT get_db_id(uint16_t* id) {
  231. file_open((uint8_t*)"/sd2snes/sd2snes.db", FA_READ);
  232. if(file_res == FR_OK) {
  233. file_readblock(id, 0, 2);
  234. /* XXX */// *id=0xdead;
  235. file_close();
  236. } else {
  237. *id=0xdead;
  238. }
  239. return file_res;
  240. }