t@CÌ[h/CgE|C^ðÚ®µÜ·BܽA¬V[N@\gpÉÍCLMT(ãq)Ìì¬ÉàgpµÜ·B
+ãã¡ã¤ã«ã®ãªã¼ã/ã©ã¤ã ãã¤ã³ã¿ã移åãã¾ããã¾ããé«éã·ã¼ã¯æ©è½ä½¿ç¨æã«ã¯CLMT(å¾è¿°)ã®ä½æã«ã使ç¨ãã¾ãã
FRESULT f_lseek ( - FIL* fp, /* [IN] t@CEIuWFNg\¢ÌÖÌ|C^ */ - DWORD ofs /* [IN] Ú®æItZbg */ + FIL* fp, /* [IN] ãã¡ã¤ã« ãªãã¸ã§ã¯ãæ§é ä½ã¸ã®ãã¤ã³ã¿ */ + FSIZE_t ofs /* [IN] 移åå ãªãã»ãã */ );
FR_OK, FR_DISK_ERR, FR_INT_ERR, -FR_NOT_READY, FR_INVALID_OBJECT, FR_TIMEOUT, FR_NOT_ENOUGH_CORE @@ -48,82 +47,84 @@ FRESULT f_lseek (
t@CÌ[h/CgE|C^(ÉÇÝoµE«Ý³êéoCgÌItZbg)ðÚ®µÜ·BItZbgÌ´_Ít@CæªÅ·B«Ý[hÅt@CETCYæèå«Èlðwè·éÆA»±ÜÅt@CETCYªg£³êAg£³ê½ªÌf[^Í¢è`ÆÈèÜ·Bf[^ðx³¬É«Ý½¢Æ«ÍA\ß±ÌÖÅKvÈTCYÜÅt@CETCYðg£µÄ¨ÆǢŵå¤Bf_lseek()ª³íI¹µ½ ÆÍA[h/CgE|C^ª³µÚ®µ½©`FbN·é׫ŷB[h/CgE|C^ªwèæ謳¢Æ«ÍAÌ´öªl¦çêÜ·B
+ãã¡ã¤ã«ã®ãªã¼ã/ã©ã¤ã ãã¤ã³ã¿(次ã«èªã¿åºãã»æ¸ãè¾¼ã¿ããããã¤ãã®ãªãã»ãã)ã移åãã¾ãããªãã»ããã®åç¹ã¯ãã¡ã¤ã«å é ã§ããæ¸ãè¾¼ã¿ã¢ã¼ãã§ãã¡ã¤ã« ãµã¤ãºãã大ããªå¤ãæå®ããã¨ãããã¾ã§ãã¡ã¤ã« ãµã¤ãºãæ¡å¼µãããæ¡å¼µãããé¨åã®ãã¼ã¿ã¯æªå®ç¾©ã¨ãªãã¾ãããã¼ã¿ãé 延ç¡ãé«éã«æ¸ãè¾¼ã¿ããã¨ãã¯ãäºããã®é¢æ°ã§å¿ è¦ãªãµã¤ãºã¾ã§ãã¡ã¤ã« ãµã¤ãºãæ¡å¼µãã¦ããã¨è¯ãã§ãããããã¡ã¤ã«ã«é£ç¶ãããã¼ã¿é åãå²ãå½ã¦ãå¿ è¦ãããã¨ãã¯ãf_expandé¢æ°ã使ç¨ãã¦ãã ãããf_lseeké¢æ°ãæ£å¸¸çµäºãããã¨ã¯ããªã¼ã/ã©ã¤ã ãã¤ã³ã¿ãæ£ãã移åããããã§ãã¯ããã¹ãã§ãããªã¼ã/ã©ã¤ã ãã¤ã³ã¿ãæå®ããå°ããã¨ãã¯ã次ã®åå ãèãããã¾ãã
_USE_FASTSEEKª1ÅAÂt@CEIuWFNgÌcltbloªNULLÈO(f_open()ÅNULLÉÝè³êé)ÌÆ«A¬V[NE[hÉÈèÜ·B±êÍt@CÌNX^zuîñ(CLMT)ðãÉ۵Ĩ±ÆÉæèAFATÉANZX·é±ÆÈãûV[NâOEV[Nð¬És¤@\Å·B¬V[NE[hÍAf_read()/f_wtite()Ì®ìÉàKp³êÜ·B¬V[NE[hÅÍf_wtite()/f_lseek()Éæét@CETCYÌg£ÍūܹñB
-¬V[N®ìðs¤OÉACLMTð쬵ĨKvª èÜ·B±êð쬷éÉÍAܸCLMTi[obt@(DWORD^zñ)ðõµAcltbloÉ»Ì|C^ðZbgµÜ·B»µÄAzñÌæªvfÉ»ÌzñÌTCY(vf)ðüêAf_lseek()ðofsÉCREATE_LINKMAPðwèµÄÄÑoµÜ·BÖª¬÷·éÆCLMTªì¬³êAÈ~Ìf_read()/f_write()/f_lseek()ÅÍFATÖÌANZXͶµÜ¹ñBFR_NOT_ENOUGH_COREŸsµ½Æ«ÍzñTCYªs«ÅAæªvfÉÍÀÛÉKvÆÈévfªÔ³êÜ·BKvÈvfÍA(t@C̪ + 1) * 2 Å·B½Æ¦ÎAt@Cª5ÂÌtOgɪf³êÄ¢éÆ«ÉKvÈvfÍA12ÆÈèÜ·B
+é«éã·ã¼ã¯ ã¢ã¼ãã¯ããã¡ã¤ã«ã®ã¯ã©ã¹ã¿é ç½®æ å ±(CLMT)ãã¡ã¢ãªä¸ã«ä¿æãã¦ãããã¨ã«ãããFATã«ã¢ã¯ã»ã¹ãããã¨ãªãå¾æ¹ã·ã¼ã¯ããã³ã° ã·ã¼ã¯ãé«éã«è¡ãæ©è½ã§ãã·ã¼ã¯åä½ã®ã»ãf_read/f_wtiteé¢æ°ã®åä½ã«ãé©ç¨ããã¾ãããã¡ã¤ã«ãé«éã·ã¼ã¯ ã¢ã¼ãã®éã¯f_wtite/f_lseeké¢æ°ã«ãããã¡ã¤ã« ãµã¤ãºã®æ¡å¼µã¯ã§ãã¾ããã
+é«éã·ã¼ã¯ ã¢ã¼ãã¯ããã¡ã¤ã« ãªãã¸ã§ã¯ãã®ã¡ã³ãcltbl(f_opené¢æ°ã§NULLã«ãªã)ã«NULL以å¤ãè¨å®ããã¨ãæå¹ã«ãªãã®ã§ãã¾ãCLMTãä½æãã¦ããå¿ è¦ãããã¾ãããããä½æããã«ã¯ãã¾ãCLMTæ ¼ç´ãããã¡(DWORDåé å)ãæºåããcltblã«ãã®ãã¤ã³ã¿ãã»ãããã¾ããããã¦ãé åã®å é è¦ç´ ã«ãã®é åã®ãµã¤ãº(è¦ç´ æ°)ãå ¥ããf_lseeké¢æ°ãofsã«CREATE_LINKMAPãæå®ãã¦å¼ã³åºãã¾ããé¢æ°ãæåããã¨CLMTãä½æããã以éã®f_read/f_write/f_lseeké¢æ°ã§ã¯FATã¸ã®ã¢ã¯ã»ã¹ã¯çºçãã¾ãããCLMTã®å é è¦ç´ ã«ã¯å®éã«ä½¿ç¨ãã(ã¾ãã¯å¿ è¦ã¨ãªã)è¦ç´ æ°ãè¿ããã¾ãã使ç¨ãããè¦ç´ æ°ã¯ã(ãã¡ã¤ã«ã®åå²æ° + 1) * 2 ã§ãããã¨ãã°ããã¡ã¤ã«ã5ã¤ã®ãã©ã°ã¡ã³ãã«åæããã¦ããã¨ãã¯ã12è¦ç´ ã使ç¨ããã¾ããFR_NOT_ENOUGH_COREã§å¤±æããã¨ãã¯ãé åãµã¤ãºãä¸è¶³ã§ãã
_FS_MINIMIZE < 3ÌÆ«gpÂ\Å·B
+_FS_MINIMIZE < 3ã®ã¨ã使ç¨å¯è½ã§ããé«éã·ã¼ã¯ ã¢ã¼ããå©ç¨ããã¨ãã¯ã_USE_FASTSEEK == 1ã§ããå¿ è¦ãããã¾ãã
- /* t@CðJ */ + /* ãã¡ã¤ã«ãéã */ fp = malloc(sizeof (FIL)); res = f_open(fp, "file.dat", FA_READ|FA_WRITE); if (res) ... - /* t@CEItZbg5000ÖÚ® */ + /* ãã¡ã¤ã« ãªãã»ãã5000ã¸ç§»å */ res = f_lseek(fp, 5000); - /* t@CI[ÖÚ®(t@CÇLÌõ) */ + /* ãã¡ã¤ã«çµç«¯ã¸ç§»å(ãã¡ã¤ã«è¿½è¨ã®æºå) */ res = f_lseek(fp, f_size(fp)); - /* 3000oCgißé */ + /* 3000ãã¤ãé²ãã */ res = f_lseek(fp, f_tell(fp) + 3000); - /* 2000oCgß· (bvAEhÉÓ) */ + /* 2000ãã¤ãæ»ã (ã©ããã¢ã©ã¦ã³ãã«æ³¨æ) */ res = f_lseek(fp, f_tell(fp) - 2000);
-/* NX^æsèÄ (Xg[~OECgÌobt@EI[o[h~) */ +/* ã¯ã©ã¹ã¿å è¡å²ãå½ã¦ (ã¹ããªã¼ãã³ã° ã©ã¤ãæã®ãããã¡ ãªã¼ãã¼ã©ã³é²æ¢) */ - res = f_open(fp, "record.wav", FA_CREATE_NEW | FA_WRITE); /* t@Cì¬ */ + res = f_open(fp, "record.wav", FA_CREATE_NEW | FA_WRITE); /* ãã¡ã¤ã«ä½æ */ - res = f_lseek(fp, MAX_SIZE); /* \ªÈNX^ÌæsèÄ */ - if (res || f_tell(fp) != PRE_SIZE) ... /* ³µt@Cªg£³ê½©`FbN */ + res = f_lseek(fp, MAX_SIZE); /* ååãªã¯ã©ã¹ã¿ã®å è¡å²ãå½ã¦ */ + if (res || f_tell(fp) != PRE_SIZE) ... /* æ£ãããã¡ã¤ã«ãæ¡å¼µãããããã§ã㯠*/ - res = f_lseek(fp, DATA_START); /* f[^EXg[ÌL^(AP[VfBC³µ) */ + res = f_lseek(fp, DATA_START); /* ãã¼ã¿ ã¹ããªã¼ã ã®è¨é²(ã¢ãã±ã¼ã·ã§ã³ãã£ã¬ã¤ç¡ã) */ ... - res = f_truncate(fp); /* svÌæÌØèÌÄ */ - res = f_lseek(fp, 0); /* wb_ÌL^ */ + res = f_truncate(fp); /* ä¸è¦é åã®åãæ¨ã¦ */ + res = f_lseek(fp, 0); /* ãããã®è¨é² */ ... res = f_close(fp);
-/* ¬V[N@\ðg¤ */ +/* é«éã·ã¼ã¯æ©è½ã使ã */ - DWORD clmt[SZ_TBL]; /* NE}bvEe[ui[obt@ */ + DWORD clmt[SZ_TBL]; /* ãªã³ã¯ ããã ãã¼ãã«æ ¼ç´ãããã¡ */ - res = f_lseek(fp, ofs1); /* ÊíV[N (I[vAcltblÍNULLÉú»³êé) */ + res = f_open(fp, fname, FA_READ | FA_WRITE); /* ãã¡ã¤ã«ãéã */ - fp->cltbl = clmt; /* ¬V[N@\ÌLø» */ - clmt[0] = SZ_TBL; /* æªvfÉzñvfðZbg */ - res = f_lseek(fp, CREATE_LINKMAP); /* CLMTÌì¬ */ + res = f_lseek(fp, ofs1); /* é常ã·ã¼ã¯ (ãªã¼ãã³æãcltblã¯NULLã«åæåããã) */ + + fp->cltbl = clmt; /* é«éã·ã¼ã¯æ©è½ã®æå¹å */ + clmt[0] = SZ_TBL; /* å é è¦ç´ ã«é åè¦ç´ æ°ãã»ãã */ + res = f_lseek(fp, CREATE_LINKMAP); /* CLMTã®ä½æ */ ... - res = f_lseek(fp, ofs2); /* È~Af_read/f_write/f_lseekÅFATANZXͶµÈ¢ */ + res = f_lseek(fp, ofs2); /* 以éãf_read/f_write/f_lseekã§FATã¢ã¯ã»ã¹ã¯çºçããªã */