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Annotation of pgp/src/zipup.c, revision 1.1.1.3

1.1.1.2   root        1: /*
                      2: 
                      3:  Copyright (C) 1990,1991 Mark Adler, Richard B. Wales, and Jean-loup Gailly.
                      4:  Permission is granted to any individual or institution to use, copy, or
                      5:  redistribute this software so long as all of the original files are included
                      6:  unmodified, that it is not sold for profit, and that this copyright notice
                      7:  is retained.
                      8: 
                      9: */
                     10: 
                     11: /*
                     12:  *  zipup.c by Mark Adler. Includes modifications by Jean-loup Gailly.
                     13:  */
                     14: 
                     15: #define NOCPYRT         /* this is not a main module */
                     16: #include <ctype.h>
                     17: #include "zip.h"
                     18: #include "zrevisio.h"
                     19: 
                     20: /* Use the raw functions for MSDOS and Unix to save on buffer space.
                     21:    They're not used for VMS since it doesn't work (raw is weird on VMS).
                     22:    (This sort of stuff belongs in fileio.c, but oh well.) */
                     23: #ifdef VMS
                     24:    typedef FILE *ftype;
                     25: #  define fhow FOPR
                     26: #  define fbad NULL
                     27: #  define zopen(n,p) fopen(n,p)
                     28: #  define zread(f,b,n) fread(b,1,n,f)
                     29: #  define zclose(f) fclose(f)
                     30: #  define zerr(f) ferror(f)
                     31: #  define zrew(f) rewind(f)
                     32: #  define zstdin stdin
                     33: #else /* !VMS */
                     34: #  ifdef MSDOS
                     35: #    include <io.h>
                     36: #    include <fcntl.h>
                     37: #    define fhow (O_RDONLY|O_BINARY)
                     38: #  else /* !MSDOS */
                     39: #ifndef AMIGA
1.1.1.3 ! root       40:      long lseek();
1.1.1.2   root       41: #endif /* AMIGA */
                     42: #    define fhow 0
                     43: #  endif /* ?MSDOS */
                     44:    typedef int ftype;
                     45: #  define fbad (-1)
                     46: #  define zopen(n,p) open(n,p)
                     47: #  define zread(f,b,n) read(f,b,n)
                     48: #  define zclose(f) close(f)
                     49: #  define zerr(f) (k==(extent)(-1L))
                     50: #  define zrew(f) lseek(f,0L,0)
                     51: #  define zstdin 0
                     52: #endif /* ?VMS */
                     53: 
                     54: /* Local data */
                     55: 
                     56: local ftype ifile;             /* file to compress */
                     57: 
1.1.1.3 ! root       58: void lm_free();
        !            59: void ct_free();
1.1.1.2   root       60: 
                     61: int zipup(FILE *inFile, FILE *y)
                     62: /* Compress the file fileName and write it to the file *y. Return an error
                     63:    code in the ZE_ class.  Also, update tempzn by the number of bytes written. */
                     64: /* ??? Does not yet handle non-seekable y */
                     65: {
                     66:   int m;                               /* method for this entry */
                     67:   long q = -1L;                        /* size returned by filetime */
                     68:   ush att;                             /* internal file attributes (dummy only) */
                     69:   ush flg;                             /* gp compresion flags (dummy only) */
                     70: 
                     71:        /* Set input file and find its size */
                     72: #ifdef VMS
                     73:        ifile = inFile;
                     74:        fseek(ifile, 0L, SEEK_END);
                     75:        q = ftell(ifile);
                     76:        fseek(ifile, 0L, SEEK_SET);
                     77: #else
                     78:        ifile = fileno( inFile );
                     79:        q = lseek(ifile, 0L, SEEK_END);
                     80:        lseek(ifile, 0L, SEEK_SET);
                     81: #endif /* VMS */
                     82: 
                     83:        m = (q == 0) ? STORE : DEFLATE;
                     84: 
                     85:   if (m == DEFLATE) {
                     86:         bi_init(y);
                     87:         att = UNKNOWN;
                     88:         ct_init(&att, &m);
                     89:         lm_init(level, &flg);
                     90:         /* s = */ deflate();
                     91:   }
1.1.1.3 ! root       92:   lm_free();
        !            93:   ct_free();
1.1.1.2   root       94: 
                     95:   return(0);
                     96: }
                     97: 
                     98: int read_buf(buf, size)
                     99:   char far *buf;
                    100:   unsigned size;
                    101: /* Read a new buffer from the current input file, and update the crc and
                    102:  * input file size.
                    103:  * IN assertion: size >= 2 (for end-of-line translation) */
                    104: {
                    105:   unsigned len;
                    106: 
                    107:   len = zread(ifile, buf, size);
                    108:   if (len == (unsigned)EOF || len == 0) return len;
                    109:   return len;
                    110: }

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