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1.1 ! root 1: /*--------------------------------------------------------------------------- ! 2: ! 3: misc.c ! 4: ! 5: This file contains a number of useful but not particularly closely related ! 6: functions; their main claim to fame is that they don't change much, so this ! 7: file should rarely need to be recompiled. The CRC-32 stuff is from crc32.c; ! 8: do_string() is from nunzip.c; makeword() and makelong() are from unzip.c; ! 9: memset() and memcpy() are from zmemset.c and zmemcpy.c, respectively; and ! 10: dos_to_unix_time() is from set_file_time_and_close() in file_io.c. ebcdic[], ! 11: check_for_newer(), dateformat(), and return_VMS() are new. Things lumped ! 12: together here to cut down on the size of unzip.c and the number of associ- ! 13: ated files floating around. ! 14: ! 15: --------------------------------------------------------------------------- ! 16: ! 17: Copyrights: see accompanying file "COPYING" in UnZip source distribution. ! 18: ! 19: ---------------------------------------------------------------------------*/ ! 20: ! 21: ! 22: #include "unzip.h" ! 23: #ifdef MSWIN ! 24: # include "wizunzip.h" ! 25: #endif ! 26: ! 27: ! 28: ! 29: #ifndef ZIPINFO /* no need to calculate CRCs */ ! 30: ! 31: /**************************/ ! 32: /* Function UpdateCRC() */ ! 33: /**************************/ ! 34: ! 35: /*-------------------------------------------------------------------- ! 36: ! 37: First, the polynomial itself and its table of feedback terms. The ! 38: polynomial is ! 39: X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 ! 40: ! 41: Note that we take it "backwards" and put the highest-order term in ! 42: the lowest-order bit. The X^32 term is "implied"; the LSB is the ! 43: X^31 term, etc. The X^0 term (usually shown as "+1") results in ! 44: the MSB being 1. ! 45: ! 46: Note that the usual hardware shift register implementation, which ! 47: is what we're using (we're merely optimizing it by doing eight-bit ! 48: chunks at a time) shifts bits into the lowest-order term. In our ! 49: implementation, that means shifting towards the right. Why do we ! 50: do it this way? Because the calculated CRC must be transmitted in ! 51: order from highest-order term to lowest-order term. UARTs transmit ! 52: characters in order from LSB to MSB. By storing the CRC this way, ! 53: we hand it to the UART in the order low-byte to high-byte; the UART ! 54: sends each low-bit to hight-bit; and the result is transmission bit ! 55: by bit from highest- to lowest-order term without requiring any bit ! 56: shuffling on our part. Reception works similarly. ! 57: ! 58: The feedback terms table consists of 256, 32-bit entries. Notes: ! 59: ! 60: The table can be generated at runtime if desired; code to do so ! 61: is shown later. It might not be obvious, but the feedback ! 62: terms simply represent the results of eight shift/xor opera- ! 63: tions for all combinations of data and CRC register values. ! 64: ! 65: The values must be right-shifted by eight bits by the "updcrc" ! 66: logic; the shift must be unsigned (bring in zeroes). On some ! 67: hardware you could probably optimize the shift in assembler by ! 68: using byte-swap instructions. ! 69: polynomial $edb88320 ! 70: ! 71: --------------------------------------------------------------------*/ ! 72: ! 73: ULONG crc_32_tab[] = ! 74: { ! 75: 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, ! 76: 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, ! 77: 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, ! 78: 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, ! 79: 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, ! 80: 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, ! 81: 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, ! 82: 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, ! 83: 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, ! 84: 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, ! 85: 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, ! 86: 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, ! 87: 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, ! 88: 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, ! 89: 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, ! 90: 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, ! 91: 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, ! 92: 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, ! 93: 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, ! 94: 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, ! 95: 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, ! 96: 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, ! 97: 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, ! 98: 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, ! 99: 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, ! 100: 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, ! 101: 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, ! 102: 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, ! 103: 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, ! 104: 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, ! 105: 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, ! 106: 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, ! 107: 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, ! 108: 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, ! 109: 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, ! 110: 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, ! 111: 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, ! 112: 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, ! 113: 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, ! 114: 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, ! 115: 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, ! 116: 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, ! 117: 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, ! 118: 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, ! 119: 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, ! 120: 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, ! 121: 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, ! 122: 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, ! 123: 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, ! 124: 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, ! 125: 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, ! 126: 0x2d02ef8dL ! 127: }; /* end crc_32_tab[] */ ! 128: ! 129: ! 130: void UpdateCRC(s, len) ! 131: register byte *s; ! 132: register int len; ! 133: { ! 134: register ULONG crcval = crc32val; ! 135: ! 136: /* update running CRC calculation with contents of a buffer */ ! 137: while (len--) ! 138: crcval = crc_32_tab[((byte) crcval ^ (*s++)) & 0xff] ^ (crcval >> 8); ! 139: crc32val = crcval; ! 140: } ! 141: ! 142: #endif /* !ZIPINFO */ ! 143: ! 144: ! 145: ! 146: ! 147: ! 148: /**************************/ ! 149: /* Function do_string() */ ! 150: /**************************/ ! 151: ! 152: int do_string(len, option) /* return PK-type error code */ ! 153: unsigned int len; /* without prototype, UWORD converted to this */ ! 154: int option; ! 155: { ! 156: int block_length, error = 0; ! 157: UWORD comment_bytes_left, extra_len; ! 158: ! 159: ! 160: /*--------------------------------------------------------------------------- ! 161: This function processes arbitrary-length (well, usually) strings. Three ! 162: options are allowed: SKIP, wherein the string is skipped pretty logical, ! 163: eh?); DISPLAY, wherein the string is printed to standard output after un- ! 164: dergoing any necessary or unnecessary character conversions; and FILENAME, ! 165: wherein the string is put into the filename[] array after undergoing ap- ! 166: propriate conversions (including case-conversion, if that is indicated: ! 167: see the global variable pInfo->lcflag). The latter option should be OK, ! 168: since filename is now dimensioned at 1025, but we check anyway. ! 169: ! 170: The string, by the way, is assumed to start at the current file-pointer ! 171: position; its length is given by len. So start off by checking length ! 172: of string: if zero, we're already set. ! 173: ---------------------------------------------------------------------------*/ ! 174: ! 175: if (!len) ! 176: return (0); /* 0: no error */ ! 177: ! 178: switch (option) { ! 179: ! 180: /* ! 181: * First case: print string on standard output. First set loop vari- ! 182: * ables, then loop through the comment in chunks of OUTBUFSIZ bytes, ! 183: * converting formats and printing as we go. The second half of the ! 184: * loop conditional was added because the file might be truncated, in ! 185: * which case comment_bytes_left will remain at some non-zero value for ! 186: * all time. outbuf is used as a scratch buffer because it is avail- ! 187: * able (we should be either before or in between any file processing). ! 188: * [The typecast in front of the MIN() macro was added because of the ! 189: * new promotion rules under ANSI C; readbuf() wants an int, but MIN() ! 190: * returns a signed long, if I understand things correctly. The proto- ! 191: * type should handle it, but just in case...] ! 192: */ ! 193: ! 194: case DISPLAY: ! 195: comment_bytes_left = len; ! 196: block_length = OUTBUFSIZ; /* for the while statement, first time */ ! 197: while (comment_bytes_left > 0 && block_length > 0) { ! 198: if ((block_length = readbuf((char *)outbuf, ! 199: (int) MIN(OUTBUFSIZ, comment_bytes_left))) <= 0) ! 200: return 51; /* 51: unexpected EOF */ ! 201: comment_bytes_left -= block_length; ! 202: NUKE_CRs(outbuf, block_length); /* (modifies block_length) */ ! 203: ! 204: /* this is why we allocated an extra byte for outbuf: */ ! 205: outbuf[block_length] = '\0'; /* terminate w/zero: ASCIIZ */ ! 206: ! 207: A_TO_N(outbuf); /* translate string to native */ ! 208: #ifdef MSWIN ! 209: /* ran out of local mem -- had to cheat */ ! 210: WriteStringToMsgWin(outbuf, bRealTimeMsgUpdate); ! 211: #else /* !MSWIN */ ! 212: printf("%s", outbuf); ! 213: #endif /* ?MSWIN */ ! 214: } ! 215: printf("\n"); /* assume no newline at end */ ! 216: break; ! 217: ! 218: /* ! 219: * Second case: read string into filename[] array. The filename should ! 220: * never ever be longer than FILNAMSIZ-1 (1024), but for now we'll check, ! 221: * just to be sure. ! 222: */ ! 223: ! 224: case FILENAME: ! 225: extra_len = 0; ! 226: if (len >= FILNAMSIZ) { ! 227: fprintf(stderr, "warning: filename too long--truncating.\n"); ! 228: error = 1; /* 1: warning error */ ! 229: extra_len = len - FILNAMSIZ + 1; ! 230: len = FILNAMSIZ - 1; ! 231: } ! 232: if (readbuf(filename, len) <= 0) ! 233: return 51; /* 51: unexpected EOF */ ! 234: filename[len] = '\0'; /* terminate w/zero: ASCIIZ */ ! 235: ! 236: A_TO_N(filename); /* translate string to native */ ! 237: ! 238: #ifndef ZIPINFO ! 239: if (pInfo->lcflag) ! 240: TOLOWER(filename, filename); /* replace with lowercase filename */ ! 241: #endif ! 242: ! 243: if (!extra_len) /* we're done here */ ! 244: break; ! 245: ! 246: /* ! 247: * We truncated the filename, so print what's left and then fall ! 248: * through to the SKIP routine. ! 249: */ ! 250: fprintf(stderr, "[ %s ]\n", filename); ! 251: len = extra_len; ! 252: /* FALL THROUGH... */ ! 253: ! 254: /* ! 255: * Third case: skip string, adjusting readbuf's internal variables ! 256: * as necessary (and possibly skipping to and reading a new block of ! 257: * data). ! 258: */ ! 259: ! 260: case SKIP: ! 261: LSEEK(cur_zipfile_bufstart + (inptr-inbuf) + len) ! 262: break; ! 263: ! 264: /* ! 265: * Fourth case: assume we're at the start of an "extra field"; malloc ! 266: * storage for it and read data into the allocated space. ! 267: */ ! 268: ! 269: case EXTRA_FIELD: ! 270: if (extra_field != (byte *)NULL) ! 271: free(extra_field); ! 272: if ((extra_field = (byte *)malloc(len)) == (byte *)NULL) { ! 273: fprintf(stderr, ! 274: "warning: extra field too long (%d). Ignoring...\n", len); ! 275: LSEEK(cur_zipfile_bufstart + (inptr-inbuf) + len) ! 276: } else ! 277: if (readbuf((char *)extra_field, len) <= 0) ! 278: return 51; /* 51: unexpected EOF */ ! 279: break; ! 280: ! 281: } /* end switch (option) */ ! 282: return error; ! 283: ! 284: } /* end function do_string() */ ! 285: ! 286: ! 287: ! 288: ! 289: ! 290: #ifndef ZIPINFO ! 291: #ifndef VMS ! 292: ! 293: /*********************************/ ! 294: /* Function dos_to_unix_time() */ ! 295: /*********************************/ ! 296: ! 297: time_t dos_to_unix_time(ddate, dtime) ! 298: unsigned ddate, dtime; ! 299: { ! 300: static short yday[]={0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; ! 301: int yr, mo, dy, hh, mm, ss, leap; ! 302: long m_time, days=0; ! 303: #if (!defined(MACOS) && !defined(MSC) && !defined(__GO32__)) ! 304: #if (defined(BSD) || defined(MTS)) ! 305: #ifndef __386BSD__ ! 306: static struct timeb tbp; ! 307: #endif /* __386BSD__ */ ! 308: #else /* !(BSD || MTS) */ ! 309: extern long timezone; /* declared in <time.h> for MSC (& Borland?) */ ! 310: #endif /* ?(BSD || MTS) */ ! 311: #endif /* !MACOS && !MSC && !__GO32__ */ ! 312: ! 313: # define YRBASE 1970 ! 314: ! 315: /* dissect date */ ! 316: yr = ((ddate >> 9) & 0x7f) + (1980 - YRBASE); ! 317: mo = ((ddate >> 5) & 0x0f) - 1; ! 318: dy = (ddate & 0x1f) - 1; ! 319: ! 320: /* dissect time */ ! 321: hh = (dtime >> 11) & 0x1f; ! 322: mm = (dtime >> 5) & 0x3f; ! 323: ss = (dtime & 0x1f) * 2; ! 324: ! 325: /* leap = # of leap years from BASE up to but not including current year */ ! 326: leap = ((yr + YRBASE - 1) / 4); /* leap year base factor */ ! 327: ! 328: /* How many days from BASE to this year? (& add expired days this year) */ ! 329: days = (yr * 365) + (leap - 492) + yday[mo]; ! 330: ! 331: /* if year is a leap year and month is after February, add another day */ ! 332: if ((mo > 1) && ((yr+YRBASE)%4 == 0) && ((yr+YRBASE) != 2100)) ! 333: ++days; /* OK through 2199 */ ! 334: ! 335: /* convert date & time to seconds relative to 00:00:00, 01/01/YRBASE */ ! 336: m_time = ((long)(days + dy) * 86400L) + ((long)hh * 3600) + (mm * 60) + ss; ! 337: /* - 1; MS-DOS times always rounded up to nearest even second */ ! 338: ! 339: #if (!defined(MACOS) && !defined(__GO32__)) ! 340: #if (defined(BSD) || defined(MTS)) ! 341: #ifndef __386BSD__ ! 342: ftime(&tbp); ! 343: m_time += tbp.timezone * 60L; ! 344: #endif ! 345: #else /* !(BSD || MTS) */ ! 346: #ifdef WIN32 ! 347: /* later... */ ! 348: #else /* !WIN32 */ ! 349: tzset(); /* set `timezone' */ ! 350: #endif /* ?WIN32 */ ! 351: m_time += timezone; /* account for timezone differences */ ! 352: #endif /* ?(BSD || MTS) */ ! 353: #endif /* !MACOS && !__GO32__ */ ! 354: ! 355: #ifdef __386BSD__ ! 356: m_time += localtime((time_t *) &m_time)->tm_gmtoff; ! 357: #else ! 358: if (localtime((time_t *)&m_time)->tm_isdst) ! 359: m_time -= 60L * 60L; /* adjust for daylight savings time */ ! 360: #endif /* __386BSD__ */ ! 361: ! 362: return m_time; ! 363: ! 364: } /* end function dos_to_unix_time() */ ! 365: ! 366: #endif /* !VMS */ ! 367: ! 368: ! 369: ! 370: ! 371: ! 372: /********************************/ ! 373: /* Function check_for_newer() */ /* could make this into a macro for Unix */ ! 374: /********************************/ ! 375: ! 376: int check_for_newer(filename) /* return 1 if existing file newer or equal; */ ! 377: char *filename; /* 0 if older; -1 if doesn't exist yet */ ! 378: { ! 379: #ifdef VMS ! 380: unsigned short timbuf[7]; ! 381: int dy, mo, yr, hh, mm, ss, dy2, mo2, yr2, hh2, mm2, ss2; ! 382: struct FAB fab; ! 383: struct XABDAT xdat; ! 384: ! 385: ! 386: if (stat(filename, &statbuf)) ! 387: return DOES_NOT_EXIST; ! 388: ! 389: fab = cc$rms_fab; ! 390: xdat = cc$rms_xabdat; ! 391: ! 392: fab.fab$l_xab = &xdat; ! 393: fab.fab$l_fna = filename; ! 394: fab.fab$b_fns = strlen(filename); ! 395: fab.fab$l_fop = FAB$M_GET | FAB$M_UFO; ! 396: ! 397: if ((sys$open(&fab) & 1) == 0) /* open failure: report exists and */ ! 398: return EXISTS_AND_OLDER; /* older so new copy will be made */ ! 399: sys$numtim(&timbuf,&xdat.xab$q_cdt); ! 400: fab.fab$l_xab = 0L; ! 401: ! 402: sys$dassgn(fab.fab$l_stv); ! 403: sys$close(&fab); /* be sure file is closed and RMS knows about it */ ! 404: ! 405: yr = timbuf[0]; ! 406: yr2 = ((lrec.last_mod_file_date >> 9) & 0x7f) + 1980; ! 407: if (yr > yr2) ! 408: return EXISTS_AND_NEWER; ! 409: else if (yr < yr2) ! 410: return EXISTS_AND_OLDER; ! 411: ! 412: mo = timbuf[1]; ! 413: mo2 = ((lrec.last_mod_file_date >> 5) & 0x0f); ! 414: if (mo > mo2) ! 415: return EXISTS_AND_NEWER; ! 416: else if (mo < mo2) ! 417: return EXISTS_AND_OLDER; ! 418: ! 419: dy = timbuf[2]; ! 420: dy2 = (lrec.last_mod_file_date & 0x1f); ! 421: if (dy > dy2) ! 422: return EXISTS_AND_NEWER; ! 423: else if (dy < dy2) ! 424: return EXISTS_AND_OLDER; ! 425: ! 426: hh = timbuf[3]; ! 427: hh2 = (lrec.last_mod_file_time >> 11) & 0x1f; ! 428: if (hh > hh2) ! 429: return EXISTS_AND_NEWER; ! 430: else if (hh < hh2) ! 431: return EXISTS_AND_OLDER; ! 432: ! 433: mm = timbuf[4]; ! 434: mm2 = (lrec.last_mod_file_time >> 5) & 0x3f; ! 435: if (mm > mm2) ! 436: return EXISTS_AND_NEWER; ! 437: else if (mm < mm2) ! 438: return EXISTS_AND_OLDER; ! 439: ! 440: /* round to nearest 2 secs--may become 60, but doesn't matter for compare */ ! 441: ss = (int)((float)timbuf[5] + (float)timbuf[6]*.01 + 1.) & -2; ! 442: ss2 = (lrec.last_mod_file_time & 0x1f) * 2; ! 443: if (ss >= ss2) ! 444: return EXISTS_AND_NEWER; ! 445: ! 446: return EXISTS_AND_OLDER; ! 447: ! 448: #else /* !VMS */ ! 449: #ifdef OS2 ! 450: long existing, archive; ! 451: ! 452: if ((existing = GetFileTime(filename)) == -1) ! 453: return DOES_NOT_EXIST; ! 454: archive = ((long) lrec.last_mod_file_date) << 16 | lrec.last_mod_file_time; ! 455: ! 456: return (existing >= archive); ! 457: #else /* !OS2 */ ! 458: time_t existing, archive; ! 459: ! 460: if (stat(filename, &statbuf)) ! 461: return DOES_NOT_EXIST; ! 462: ! 463: /* round up existing filetime to nearest 2 seconds for comparison */ ! 464: existing = (statbuf.st_mtime & 1) ? statbuf.st_mtime+1 : statbuf.st_mtime; ! 465: archive = dos_to_unix_time(lrec.last_mod_file_date, ! 466: lrec.last_mod_file_time); ! 467: ! 468: return (existing >= archive); ! 469: #endif /* ?OS2 */ ! 470: #endif /* ?VMS */ ! 471: ! 472: } /* end function check_for_newer() */ ! 473: ! 474: ! 475: ! 476: ! 477: ! 478: /***************************/ ! 479: /* Function dateformat() */ ! 480: /***************************/ ! 481: ! 482: int dateformat() ! 483: { ! 484: ! 485: /*----------------------------------------------------------------------------- ! 486: For those operating systems which support it, this function returns a value ! 487: which tells how national convention says that numeric dates are displayed. ! 488: ! 489: Return values are DF_YMD, DF_DMY and DF_MDY. The meanings should be fairly ! 490: obvious. ! 491: -----------------------------------------------------------------------------*/ ! 492: ! 493: #ifdef OS2 ! 494: switch (GetCountryInfo()) { ! 495: case 0 /* DATEFMT_MM_DD_YY */ : ! 496: return DF_MDY; ! 497: case 1 /* DATEFMT_DD_MM_YY */ : ! 498: return DF_DMY; ! 499: case 2 /* DATEFMT_YY_MM_DD */ : ! 500: return DF_YMD; ! 501: } ! 502: #else /* !OS2 */ ! 503: #if (defined(MSDOS) && !defined(MSWIN)) ! 504: unsigned short _CountryInfo[18]; ! 505: #ifdef __GO32__ ! 506: unsigned short *CountryInfo = _CountryInfo; ! 507: ! 508: bdos(0x38, (unsigned)CountryInfo, 0); ! 509: #else /* !__GO32__ */ ! 510: unsigned short far *CountryInfo = _CountryInfo; ! 511: union REGS regs; ! 512: struct SREGS sregs; ! 513: ! 514: regs.x.ax = 0x3800; ! 515: regs.x.dx = FP_OFF(CountryInfo); ! 516: sregs.ds = FP_SEG(CountryInfo); ! 517: int86x(0x21, ®s, ®s, &sregs); ! 518: #endif /* ?__GO32__ */ ! 519: ! 520: switch(CountryInfo[0]) { ! 521: case 0: ! 522: return DF_MDY; ! 523: case 1: ! 524: return DF_DMY; ! 525: case 2: ! 526: return DF_YMD; ! 527: } ! 528: #endif /* MSDOS && !MSWIN */ ! 529: #endif /* ?OS2 */ ! 530: ! 531: return DF_MDY; /* default for Unix, VMS, etc. */ ! 532: ! 533: } /* end function dateformat() */ ! 534: ! 535: #endif /* !ZIPINFO */ ! 536: ! 537: ! 538: ! 539: ! 540: ! 541: #ifdef EBCDIC ! 542: ! 543: /* ! 544: * This is the MTS ASCII->EBCDIC translation table. It provides a 1-1 ! 545: * translation from ISO 8859/1 8-bit ASCII to IBM Code Page 37 EBCDIC. ! 546: */ ! 547: ! 548: unsigned char ebcdic[] = ! 549: { ! 550: 0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f, ! 551: 0x16, 0x05, 0x25, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, ! 552: 0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26, ! 553: 0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f, ! 554: 0x40, 0x5a, 0x7f, 0x7b, 0x5b, 0x6c, 0x50, 0x7d, ! 555: 0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61, ! 556: 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, ! 557: 0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f, ! 558: 0x7c, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, ! 559: 0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, ! 560: 0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, ! 561: 0xe7, 0xe8, 0xe9, 0xba, 0xe0, 0xbb, 0xb0, 0x6d, ! 562: 0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, ! 563: 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, ! 564: 0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, ! 565: 0xa7, 0xa8, 0xa9, 0xc0, 0x4f, 0xd0, 0xa1, 0x07, ! 566: 0x20, 0x21, 0x22, 0x23, 0x24, 0x15, 0x06, 0x17, ! 567: 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x09, 0x0a, 0x1b, ! 568: 0x30, 0x31, 0x1a, 0x33, 0x34, 0x35, 0x36, 0x08, ! 569: 0x38, 0x39, 0x3a, 0x3b, 0x04, 0x14, 0x3e, 0xff, ! 570: 0x41, 0xaa, 0x4a, 0xb1, 0x9f, 0xb2, 0x6a, 0xb5, ! 571: 0xbd, 0xb4, 0x9a, 0x8a, 0x5f, 0xca, 0xaf, 0xbc, ! 572: 0x90, 0x8f, 0xea, 0xfa, 0xbe, 0xa0, 0xb6, 0xb3, ! 573: 0x9d, 0xda, 0x9b, 0x8b, 0xb7, 0xb8, 0xb9, 0xab, ! 574: 0x64, 0x65, 0x62, 0x66, 0x63, 0x67, 0x9e, 0x68, ! 575: 0x74, 0x71, 0x72, 0x73, 0x78, 0x75, 0x76, 0x77, ! 576: 0xac, 0x69, 0xed, 0xee, 0xeb, 0xef, 0xec, 0xbf, ! 577: 0x80, 0xfd, 0xfe, 0xfb, 0xfc, 0xad, 0xae, 0x59, ! 578: 0x44, 0x45, 0x42, 0x46, 0x43, 0x47, 0x9c, 0x48, ! 579: 0x54, 0x51, 0x52, 0x53, 0x58, 0x55, 0x56, 0x57, ! 580: 0x8c, 0x49, 0xcd, 0xce, 0xcb, 0xcf, 0xcc, 0xe1, ! 581: 0x70, 0xdd, 0xde, 0xdb, 0xdc, 0x8d, 0x8e, 0xdf ! 582: }; /* end ebcdic[] */ ! 583: ! 584: #endif /* EBCDIC */ ! 585: ! 586: ! 587: ! 588: ! 589: ! 590: /*************************/ ! 591: /* Function makeword() */ ! 592: /*************************/ ! 593: ! 594: UWORD makeword(b) ! 595: byte *b; ! 596: { ! 597: /* ! 598: * Convert Intel style 'short' integer to non-Intel non-16-bit ! 599: * host format. This routine also takes care of byte-ordering. ! 600: */ ! 601: return ((b[1] << 8) | b[0]); ! 602: } ! 603: ! 604: ! 605: ! 606: ! 607: ! 608: /*************************/ ! 609: /* Function makelong() */ ! 610: /*************************/ ! 611: ! 612: ULONG makelong(sig) ! 613: byte *sig; ! 614: { ! 615: /* ! 616: * Convert intel style 'long' variable to non-Intel non-16-bit ! 617: * host format. This routine also takes care of byte-ordering. ! 618: */ ! 619: return (((ULONG) sig[3]) << 24) ! 620: + (((ULONG) sig[2]) << 16) ! 621: + (((ULONG) sig[1]) << 8) ! 622: + ((ULONG) sig[0]); ! 623: } ! 624: ! 625: ! 626: ! 627: ! 628: ! 629: #ifdef VMS ! 630: ! 631: /***************************/ ! 632: /* Function return_VMS() */ ! 633: /***************************/ ! 634: ! 635: void return_VMS(zip_error) ! 636: int zip_error; ! 637: { ! 638: #ifdef RETURN_CODES ! 639: /*--------------------------------------------------------------------------- ! 640: Do our own, explicit processing of error codes and print message, since ! 641: VMS misinterprets return codes as rather obnoxious system errors ("access ! 642: violation," for example). ! 643: ---------------------------------------------------------------------------*/ ! 644: ! 645: switch (zip_error) { ! 646: ! 647: case 0: ! 648: break; /* life is fine... */ ! 649: case 1: ! 650: fprintf(stderr, "\n[return-code 1: warning error \ ! 651: (e.g., failed CRC or unknown compression method)]\n"); ! 652: break; ! 653: case 2: ! 654: case 3: ! 655: fprintf(stderr, "\n[return-code %d: error in zipfile \ ! 656: (e.g., can't find local file header sig)]\n", ! 657: zip_error); ! 658: break; ! 659: case 4: ! 660: case 5: ! 661: case 6: ! 662: case 7: ! 663: case 8: ! 664: fprintf(stderr, "\n[return-code %d: insufficient memory]\n", ! 665: zip_error); ! 666: break; ! 667: case 9: ! 668: fprintf(stderr, "\n[return-code 9: zipfile not found]\n"); ! 669: break; ! 670: case 10: /* this is the one that gives "access violation," I think */ ! 671: fprintf(stderr, "\n[return-code 10: bad or illegal parameters \ ! 672: specified on command line]\n"); ! 673: break; ! 674: case 11: /* I'm not sure this one is implemented, but maybe soon? */ ! 675: fprintf(stderr, ! 676: "\n[return-code 11: no files found to extract/view/etc.]\n"); ! 677: break; ! 678: case 50: ! 679: fprintf(stderr, ! 680: "\n[return-code 50: disk full (or otherwise unable to open output file)]\n"); ! 681: break; ! 682: case 51: ! 683: fprintf(stderr, ! 684: "\n[return-code 51: unexpected EOF in zipfile (i.e., truncated)]\n"); ! 685: break; ! 686: default: ! 687: fprintf(stderr, "\n[return-code %d: unknown return-code \ ! 688: (who put this one in? Wasn't me...)]\n", ! 689: zip_error); ! 690: break; ! 691: } ! 692: #endif /* RETURN_CODES */ ! 693: ! 694: exit(0); /* everything okey-dokey as far as VMS concerned */ ! 695: ! 696: } /* end function return_VMS() */ ! 697: ! 698: #endif /* VMS */ ! 699: ! 700: ! 701: ! 702: ! 703: ! 704: #ifdef ZMEM /* memset, memcpy for systems without them */ ! 705: ! 706: /***********************/ ! 707: /* Function memset() */ ! 708: /***********************/ ! 709: ! 710: char *memset(buf, init, len) ! 711: register char *buf, init; /* buffer loc and initializer */ ! 712: register unsigned int len; /* length of the buffer */ ! 713: { ! 714: char *start; ! 715: ! 716: start = buf; ! 717: while (len--) ! 718: *(buf++) = init; ! 719: return (start); ! 720: } ! 721: ! 722: ! 723: ! 724: ! 725: ! 726: /***********************/ ! 727: /* Function memcpy() */ ! 728: /***********************/ ! 729: ! 730: char *memcpy(dst, src, len) ! 731: register char *dst, *src; ! 732: register unsigned int len; ! 733: { ! 734: char *start; ! 735: ! 736: start = dst; ! 737: while (len-- > 0) ! 738: *dst++ = *src++; ! 739: return (start); ! 740: } ! 741: ! 742: #endif /* ZMEM */
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