/*--------------------------------------------------------------------------- file_io.c This file contains routines for doing direct input/output, file-related sorts of things, plus some miscellaneous stuff. Most of the system- specific code for UnZip is contained here; some is in shared.c; most of the remainder is in OS-specific files. [This file contains routines which formerly resided in misc.c.] --------------------------------------------------------------------------- Copyrights: see accompanying file "COPYING" in UnZip source distribution. ---------------------------------------------------------------------------*/ /* this was only for crypt stuff, I think... #if (!defined(__GO32__)) && (!defined(LINUX)) && (!defined(NeXT)) # define const #endif */ #define FILE_IO_C #include "unzip.h" #include "crypt.h" #ifdef MSWIN # include "wizunzip.h" #endif #if (!defined(DOS_NT_OS2)) || defined(MSWIN) static int dos2unix __((unsigned char *buf, int len)); int CR_flag = 0; /* when last char of buffer == CR (for dos2unix()) */ #endif #ifndef VMS /* for VMS use code in vms.c */ /*********************************/ /* Function create_output_file() */ /*********************************/ int create_output_file() /* return non-0 if creat failed */ { #ifdef TOPS20 char *tfilnam; #endif /*--------------------------------------------------------------------------- Create the output file with appropriate permissions. If we've gotten to this point and the file still exists, we have permission to blow it away. ---------------------------------------------------------------------------*/ #if (!defined(DOS_NT_OS2) || defined(MSWIN)) CR_flag = 0; /* hack to get CR at end of buffer working */ #endif #ifdef UNIX { int mask; if (!stat(filename, &statbuf) && (unlink(filename) < 0)) { fprintf(stderr, "\n%s: cannot delete old copy\n", filename); return 1; } mask = umask(0); /* now know that we own it */ #ifdef SYMLINKS if (symlnk) outfd = creat(filename, 0600); /* make sure we can read it later */ else #endif /* SYMLINKS */ outfd = creat(filename, 0xffff & pInfo->file_attr); /* Unix */ umask(mask); } #else /* !UNIX */ /* file permissions set after file closed */ #ifdef TOPS20 if ((tfilnam = (char *)malloc(2*strlen(filename)+1)) == NULL) return 1; strcpy(tfilnam, filename); upper(tfilnam); enquote(tfilnam); outfd = creat(tfilnam, S_IWRITE | S_IREAD); /* TOPS-20 */ #else /* !TOPS20 */ #ifndef MACOS outfd = creat(filename, S_IWRITE | S_IREAD); /* MS-DOS, OS/2, Amiga */ #else /* MACOS */ { short fDataFork=TRUE; MACINFO mi; OSErr err; fMacZipped = FALSE; CtoPstr(filename); if (extra_field && (lrec.extra_field_length > sizeof(MACINFOMIN)) && (lrec.extra_field_length <= sizeof(MACINFO))) { BlockMove(extra_field, &mi, lrec.extra_field_length); if ((makeword((uch *)&mi.header) == 1992) && (makeword((uch *)&mi.data) == lrec.extra_field_length-sizeof(ZIP_EXTRA_HEADER)) && (mi.signature == 'JLEE')) { gostCreator = mi.finfo.fdCreator; gostType = mi.finfo.fdType; fDataFork = (mi.flags & 1) ? TRUE : FALSE; fMacZipped = true; /* If it was Zipped w/Mac version, the filename has either */ /* a 'd' or 'r' appended. Remove the d/r when unzipping */ filename[0]-=1; } } if (!fMacZipped) { if (!aflag) gostType = gostCreator = '\?\?\?\?'; else { gostCreator = CREATOR; gostType = 'TEXT'; } } PtoCstr(filename); outfd = creat(filename, 0); if (fMacZipped) { CtoPstr(filename); if (hfsflag) { HParamBlockRec hpbr; hpbr.fileParam.ioNamePtr = (StringPtr)filename; hpbr.fileParam.ioVRefNum = gnVRefNum; hpbr.fileParam.ioDirID = glDirID; hpbr.fileParam.ioFlFndrInfo = mi.finfo; hpbr.fileParam.ioFlCrDat = mi.lCrDat; hpbr.fileParam.ioFlMdDat = mi.lMdDat; err = PBHSetFInfo(&hpbr, 0); } else { err = SetFInfo((StringPtr)filename , 0, &mi.finfo); } PtoCstr(filename); } if (outfd != -1) outfd = open(filename, (fDataFork)? 1 : 2); } #endif /* ?MACOS */ #endif /* ?TOPS20 */ #endif /* ?UNIX */ if (outfd < 1) { fprintf(stderr, "\n%s: cannot create\n", filename); #ifdef TOPS20 free(tfilnam); #endif return 1; } /*--------------------------------------------------------------------------- If newly created file is in text mode and should be binary (to disable automatic CR/LF translations), either close it and reopen as binary or else change the mode to binary (DOS, OS/2). ---------------------------------------------------------------------------*/ #if (!defined(UNIX) && !defined(MACOS)) if (!aflag) { #ifdef DOS_NT_OS2 if (setmode(outfd, O_BINARY) == -1) { #else /* !DOS_NT_OS2 */ close(outfd); #ifndef TOPS20 if ((outfd = open(filename, O_RDWR | O_BINARY)) < 1) { #else /* TOPS20 */ if ((outfd = open(tfilnam, O_RDWR | O_BSIZE_8)) < 1) { free(tfilnam); #endif /* ?TOPS20 */ #endif /* ?DOS_NT_OS2 */ fprintf(stderr, "Can't make output file binary: %s\n", filename); return 1; } } #endif /* !UNIX && !MACOS */ #ifdef TOPS20 free(tfilnam); #endif return 0; } #endif /* !VMS */ /****************************/ /* Function FillBitBuffer() */ /****************************/ int FillBitBuffer() { /* * Fill bitbuf, which is 32 bits. This function is only used by the * READBIT and PEEKBIT macros (which are used by all of the uncompression * routines). */ ush temp; zipeof = 1; while (bits_left < 25 && ReadByte(&temp) == 8) { bitbuf |= (ulg)temp << bits_left; bits_left += 8; zipeof = 0; } return 0; } /***********************/ /* Function ReadByte() */ /***********************/ int ReadByte(x) ush *x; { /* * read a byte; return 8 if byte available, 0 if not */ if (mem_mode) return ReadMemoryByte(x); if (csize-- <= 0) return 0; if (incnt == 0) { if ((incnt = read(zipfd, (char *)inbuf, INBUFSIZ)) <= 0) return 0; /* buffer ALWAYS starts on a block boundary: */ cur_zipfile_bufstart += INBUFSIZ; inptr = inbuf; #ifdef CRYPT if (pInfo->encrypted) { uch *p; int n, t; for (n = (longint)incnt > csize + 1 ? (int)csize + 1 : incnt, p = inptr; n--; p++) zdecode(*p); } #endif /* CRYPT */ } *x = *inptr++; --incnt; return 8; } #ifndef VMS /* for VMS use code in vms.c */ /**************************/ /* Function FlushOutput() */ /**************************/ int FlushOutput() { /* * flush contents of output buffer; return PK-type error code */ #if (!defined(DOS_NT_OS2)) || defined(MSWIN) static int saved_ctrlZ = FALSE; #endif int len; if (mem_mode) { int rc = FlushMemory(); outpos += outcnt; outcnt = 0; outptr = outbuf; return rc; } if (disk_full) { outpos += outcnt; /* fake emptied buffer */ outcnt = 0; outptr = outbuf; return 50; /* ignore rest of this file */ } if (newfile) { #if (!defined(DOS_NT_OS2)) || defined(MSWIN) saved_ctrlZ = FALSE; #endif newfile = FALSE; } if (outcnt) { #if (!defined(DOS_NT_OS2)) || defined(MSWIN) if (saved_ctrlZ) { UpdateCRC(outbuf+1, outcnt-1); /* don't calc ^Z CRC twice */ saved_ctrlZ = FALSE; } else #endif UpdateCRC(outbuf, outcnt); if (!tflag) { #if (!defined(DOS_NT_OS2)) || defined(MSWIN) if (aflag) { if (outbuf[outcnt-1] == CTRLZ) { --outcnt; saved_ctrlZ = TRUE; } len = dos2unix(outbuf, outcnt); } else #endif /* !DOS_NT_OS2 || MSWIN */ len = outcnt; #ifdef MACOS if ((giCursor+1) >> 2 != (giCursor>>2)) SetCursor( *rghCursor[((giCursor+1)>>2)&0x03] ); giCursor = (giCursor+1) & 15; #endif /* MACOS */ #ifdef MSWIN /* if writing to console vs. actual file, write to Msg Window */ if (cflag) WriteBufferToMsgWin(outout, len, FALSE); else if (_lwrite(outfd, outout, len) != (UINT)len) #else /* !MSWIN */ if (write(outfd, (char *)outout, len) != len) #endif /* ?MSWIN */ #ifdef DOS_NT_OS2 if (!cflag) /* ^Z treated as EOF, removed with -c */ #else /* !DOS_NT_OS2 */ #ifdef MINIX if (errno == EFBIG) if (write(fd, outout, len/2) != len/2 || write(fd, outout+len/2, len/2) != len/2) #endif /* MINIX */ #endif /* ?DOS_NT_OS2 */ { /* GRR: add test for force_flag when has its own switch */ fprintf(stderr, "\n%s: write error (disk full?). Continue? (y/n/^C) ", filename); FFLUSH(stderr); #ifndef MSWIN fgets(answerbuf, 9, stdin); if (*answerbuf == 'y') /* stop writing to this file */ disk_full = 1; /* (outfd bad?), but new OK */ else #endif /* ?MSWIN */ disk_full = 2; /* no: exit program */ return 50; /* 50: disk full */ } } /* end if (!tflag) */ outpos += outcnt; outcnt = 0; outptr = outbuf; #if (!defined(DOS_NT_OS2)) || defined(MSWIN) if (saved_ctrlZ) { ++outcnt; *outptr++ = CTRLZ; } #endif /* !DOS_NT_OS2 || MSWIN */ } return 0; /* 0: no error */ } #endif /* !VMS */ #if (!defined(DOS_NT_OS2) || defined(MSWIN)) /***********************/ /* Function dos2unix() */ /***********************/ static int dos2unix(buf, len) /* GRR: rewrite for generic text conversions */ unsigned char *buf; int len; { int new_len; int i; #ifdef MSWIN unsigned char __far *walker; #else /* !MSWIN */ unsigned char *walker; #endif /* ?MSWIN */ new_len = len; walker = outout; #ifdef MACOS /* * Mac wants to strip LFs instead CRs from CRLF pairs */ if (CR_flag && *buf == LF) { buf++; new_len--; len--; CR_flag = buf[len] == CR; } else CR_flag = buf[len - 1] == CR; for (i = 0; i < len; i += 1) { *walker++ = ascii_to_native(*buf); if (*buf == LF) walker[-1] = CR; if (*buf++ == CR && *buf == LF) { new_len--; buf++; i++; } } #else /* !MACOS */ if (CR_flag && *buf != LF) *walker++ = ascii_to_native(CR); CR_flag = buf[len - 1] == CR; for (i = 0; i < len; i += 1) { *walker++ = ascii_to_native(*buf); if (*buf++ == CR && *buf == LF) { new_len--; walker[-1] = ascii_to_native(*buf++); i++; } } /* * If the last character is a CR, then "ignore it" for now... */ if (walker[-1] == ascii_to_native(CR)) new_len--; #endif /* ?MACOS */ return new_len; } #endif /* !DOS_NT_OS2 || MSWIN */ /**********************/ /* Function handler() */ /**********************/ void handler(signal) /* upon interrupt, turn on echo and exit cleanly */ int signal; { #if defined(SIGBUS) || defined(SIGSEGV) static char *corrupt = "error: zipfile probably corrupt\n"; #endif #ifndef DOS_NT_OS2 echon(); putc('\n', stderr); #endif /* !DOS_NT_OS2 */ #ifdef SIGBUS if (signal == SIGBUS) { fprintf(stderr, corrupt); exit(3); } #endif /* SIGBUS */ #ifdef SIGSEGV if (signal == SIGSEGV) { fprintf(stderr, corrupt); exit(3); } #endif /* SIGSEGV */ exit(0); } /************************/ /* Function UpdateCRC() */ /************************/ /*-------------------------------------------------------------------- First, the polynomial itself and its table of feedback terms. The polynomial is 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 Note that we take it "backwards" and put the highest-order term in the lowest-order bit. The X^32 term is "implied"; the LSB is the X^31 term, etc. The X^0 term (usually shown as "+1") results in the MSB being 1. Note that the usual hardware shift register implementation, which is what we're using (we're merely optimizing it by doing eight-bit chunks at a time) shifts bits into the lowest-order term. In our implementation, that means shifting towards the right. Why do we do it this way? Because the calculated CRC must be transmitted in order from highest-order term to lowest-order term. UARTs transmit characters in order from LSB to MSB. By storing the CRC this way, we hand it to the UART in the order low-byte to high-byte; the UART sends each low-bit to hight-bit; and the result is transmission bit by bit from highest- to lowest-order term without requiring any bit shuffling on our part. Reception works similarly. The feedback terms table consists of 256, 32-bit entries. Notes: The table can be generated at runtime if desired; code to do so is shown later. It might not be obvious, but the feedback terms simply represent the results of eight shift/xor opera- tions for all combinations of data and CRC register values. The values must be right-shifted by eight bits by the "updcrc" logic; the shift must be unsigned (bring in zeroes). On some hardware you could probably optimize the shift in assembler by using byte-swap instructions. polynomial $edb88320 --------------------------------------------------------------------*/ ulg crc_32_tab[] = { 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL }; /* end crc_32_tab[] */ void UpdateCRC(s, len) register uch *s; register int len; { register ulg crcval = crc32val; /* update running CRC calculation with contents of a buffer */ while (len--) crcval = crc_32_tab[((uch)crcval ^ (*s++)) & 0xff] ^ (crcval >> 8); crc32val = crcval; } #ifndef VMS /*******************************/ /* Function dos_to_unix_time() */ /*******************************/ time_t dos_to_unix_time(ddate, dtime) unsigned ddate, dtime; { int yr, mo, dy, hh, mm, ss; #ifdef TOPS20 # define YRBASE 1900 struct tmx *tmx; char temp[20]; time_t retval; #else /* !TOPS20 */ # define YRBASE 1970 static short yday[]={0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; int leap; long m_time, days=0; #if (!defined(MACOS)) && (!defined(MSC)) && (!defined(__GO32__)) #if defined(BSD) || defined(MTS) #ifndef __386BSD__ static struct timeb tbp; #endif /* __386BSD__ */ #else /* !(BSD || MTS) */ extern long timezone; /* declared in for MSC (& Borland?) */ #endif /* ?(BSD || MTS) */ #endif /* !MACOS && !MSC && !__GO32__ */ #endif /* ?TOPS20 */ /* dissect date */ yr = ((ddate >> 9) & 0x7f) + (1980 - YRBASE); mo = ((ddate >> 5) & 0x0f) - 1; dy = (ddate & 0x1f) - 1; /* dissect time */ hh = (dtime >> 11) & 0x1f; mm = (dtime >> 5) & 0x3f; ss = (dtime & 0x1f) * 2; #ifdef TOPS20 tmx = (struct tmx *)malloc(sizeof(struct tmx)); sprintf (temp, "%02d/%02d/%02d %02d:%02d:%02d", mo+1, dy+1, yr, hh, mm, ss); time_parse(temp, tmx, (char *)0); retval = time_make(tmx); free(tmx); return retval; #else /* !TOPS20 */ /* leap = # of leap years from BASE up to but not including current year */ leap = ((yr + YRBASE - 1) / 4); /* leap year base factor */ /* How many days from BASE to this year? (& add expired days this year) */ days = (yr * 365) + (leap - 492) + yday[mo]; /* if year is a leap year and month is after February, add another day */ if ((mo > 1) && ((yr+YRBASE)%4 == 0) && ((yr+YRBASE) != 2100)) ++days; /* OK through 2199 */ /* convert date & time to seconds relative to 00:00:00, 01/01/YRBASE */ m_time = ((long)(days + dy) * 86400L) + ((long)hh * 3600) + (mm * 60) + ss; /* - 1; MS-DOS times always rounded up to nearest even second */ #if (!defined(MACOS)) && (!defined(__GO32__)) #if defined(BSD) || defined(MTS) #ifndef __386BSD__ ftime(&tbp); m_time += tbp.timezone * 60L; #endif #else /* !(BSD || MTS) */ #ifdef WIN32 /* later... */ #else /* !WIN32 */ tzset(); /* set `timezone' */ #endif /* ?WIN32 */ m_time += timezone; /* account for timezone differences */ #endif /* ?(BSD || MTS) */ #endif /* !MACOS && !__GO32__ */ #ifdef __386BSD__ /* see comments in file_io.c */ m_time -= localtime((time_t *) &m_time)->tm_gmtoff; #else if (localtime((time_t *)&m_time)->tm_isdst) m_time -= 60L * 60L; /* adjust for daylight savings time */ #endif /* ?__386BSD__ */ return m_time; #endif /* ?TOPS20 */ } /* end function dos_to_unix_time() */ #endif /* !VMS */ /******************************/ /* Function check_for_newer() */ /* could make this into a macro for Unix */ /******************************/ int check_for_newer(filename) /* return 1 if existing file newer or equal; */ char *filename; /* 0 if older; -1 if doesn't exist yet */ { #ifdef VMS unsigned short timbuf[7]; int dy, mo, yr, hh, mm, ss, dy2, mo2, yr2, hh2, mm2, ss2; struct FAB fab; struct XABDAT xdat; if (stat(filename, &statbuf)) return DOES_NOT_EXIST; fab = cc$rms_fab; xdat = cc$rms_xabdat; fab.fab$l_xab = &xdat; fab.fab$l_fna = filename; fab.fab$b_fns = strlen(filename); fab.fab$l_fop = FAB$M_GET | FAB$M_UFO; if ((sys$open(&fab) & 1) == 0) /* open failure: report exists and */ return EXISTS_AND_OLDER; /* older so new copy will be made */ sys$numtim(&timbuf,&xdat.xab$q_cdt); fab.fab$l_xab = 0L; sys$dassgn(fab.fab$l_stv); sys$close(&fab); /* be sure file is closed and RMS knows about it */ yr = timbuf[0]; yr2 = ((lrec.last_mod_file_date >> 9) & 0x7f) + 1980; if (yr > yr2) return EXISTS_AND_NEWER; else if (yr < yr2) return EXISTS_AND_OLDER; mo = timbuf[1]; mo2 = ((lrec.last_mod_file_date >> 5) & 0x0f); if (mo > mo2) return EXISTS_AND_NEWER; else if (mo < mo2) return EXISTS_AND_OLDER; dy = timbuf[2]; dy2 = (lrec.last_mod_file_date & 0x1f); if (dy > dy2) return EXISTS_AND_NEWER; else if (dy < dy2) return EXISTS_AND_OLDER; hh = timbuf[3]; hh2 = (lrec.last_mod_file_time >> 11) & 0x1f; if (hh > hh2) return EXISTS_AND_NEWER; else if (hh < hh2) return EXISTS_AND_OLDER; mm = timbuf[4]; mm2 = (lrec.last_mod_file_time >> 5) & 0x3f; if (mm > mm2) return EXISTS_AND_NEWER; else if (mm < mm2) return EXISTS_AND_OLDER; /* round to nearest 2 secs--may become 60, but doesn't matter for compare */ ss = (int)((float)timbuf[5] + (float)timbuf[6]*.01 + 1.) & -2; ss2 = (lrec.last_mod_file_time & 0x1f) * 2; if (ss >= ss2) return EXISTS_AND_NEWER; return EXISTS_AND_OLDER; #else /* !VMS */ #ifdef OS2 long existing, archive; if ((existing = GetFileTime(filename)) == -1) return DOES_NOT_EXIST; archive = ((long) lrec.last_mod_file_date) << 16 | lrec.last_mod_file_time; return (existing >= archive); #else /* !OS2 */ time_t existing, archive; if (stat(filename, &statbuf)) return DOES_NOT_EXIST; /* round up existing filetime to nearest 2 seconds for comparison */ existing = (statbuf.st_mtime & 1) ? statbuf.st_mtime+1 : statbuf.st_mtime; archive = dos_to_unix_time(lrec.last_mod_file_date, lrec.last_mod_file_time); return (existing >= archive); #endif /* ?OS2 */ #endif /* ?VMS */ } /* end function check_for_newer() */ /*************************/ /* Function dateformat() */ /*************************/ int dateformat() { /*----------------------------------------------------------------------------- For those operating systems which support it, this function returns a value which tells how national convention says that numeric dates are displayed. Return values are DF_YMD, DF_DMY and DF_MDY. The meanings should be fairly obvious. -----------------------------------------------------------------------------*/ #ifdef OS2 switch (GetCountryInfo()) { case 0 /* DATEFMT_MM_DD_YY */ : return DF_MDY; case 1 /* DATEFMT_DD_MM_YY */ : return DF_DMY; case 2 /* DATEFMT_YY_MM_DD */ : return DF_YMD; } #else /* !OS2 */ #if (defined(MSDOS) && !defined(MSWIN) && !defined(__GO32__)) unsigned short _CountryInfo[18]; unsigned short far *CountryInfo = _CountryInfo; union REGS regs; struct SREGS sregs; regs.x.ax = 0x3800; regs.x.dx = FP_OFF(CountryInfo); sregs.ds = FP_SEG(CountryInfo); int86x(0x21, ®s, ®s, &sregs); switch(CountryInfo[0]) { case 0: return DF_MDY; case 1: return DF_DMY; case 2: return DF_YMD; } #endif /* MSDOS && !MSWIN && !__GO32__ */ #endif /* ?OS2 */ return DF_MDY; /* default for Unix, VMS, etc. */ } /* end function dateformat() */