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Annotation of pgp/src/zipup.c, revision 1.1.1.1

1.1       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: #ifdef OS2
                     20: #  include "dir_os2.h"
                     21: #endif /* OS2 */
                     22: 
                     23: /* Use the raw functions for MSDOS and Unix to save on buffer space.
                     24:    They're not used for VMS since it doesn't work (raw is weird on VMS).
                     25:    (This sort of stuff belongs in fileio.c, but oh well.) */
                     26: #ifdef VMS
                     27:    typedef FILE *ftype;
                     28: #  define fhow FOPR
                     29: #  define fbad NULL
                     30: #  define zopen(n,p) fopen(n,p)
                     31: #  define zread(f,b,n) fread(b,1,n,f)
                     32: #  define zclose(f) fclose(f)
                     33: #  define zerr(f) ferror(f)
                     34: #  define zrew(f) rewind(f)
                     35: #  define zstdin stdin
                     36: #else /* !VMS */
                     37: #  ifdef MSDOS
                     38: #    include <io.h>
                     39: #    include <fcntl.h>
                     40: #    define fhow (O_RDONLY|O_BINARY)
                     41: #  else /* !MSDOS */
                     42: #ifndef AMIGA
                     43:      int open OF((char *, int));
                     44:      int read OF((int, char *, int));
                     45:      int close OF((int));
                     46:      long lseek OF((int, long, int));
                     47: #endif /* AMIGA */
                     48: #    define fhow 0
                     49: #  endif /* ?MSDOS */
                     50:    typedef int ftype;
                     51: #  define fbad (-1)
                     52: #  define zopen(n,p) open(n,p)
                     53: #  define zread(f,b,n) read(f,b,n)
                     54: #  define zclose(f) close(f)
                     55: #  define zerr(f) (k==(extent)(-1L))
                     56: #  define zrew(f) lseek(f,0L,0)
                     57: #  define zstdin 0
                     58: #endif /* ?VMS */
                     59: 
                     60: /* Local data */
                     61: 
                     62: local ftype ifile;             /* file to compress */
                     63: 
                     64: 
                     65: int zipup(FILE *inFile, FILE *y)
                     66: /* Compress the file fileName and write it to the file *y. Return an error
                     67:    code in the ZE_ class.  Also, update tempzn by the number of bytes written. */
                     68: /* ??? Does not yet handle non-seekable y */
                     69: {
                     70:   int m;                               /* method for this entry */
                     71:   long q = -1L;                        /* size returned by filetime */
                     72:   ush att;                             /* internal file attributes (dummy only) */
                     73:   ush flg;                             /* gp compresion flags (dummy only) */
                     74: 
                     75:        /* Set input file and find its size */
                     76: #ifdef VMS
                     77:        ifile = inFile;
                     78:        fseek(ifile, 0L, SEEK_END);
                     79:        q = ftell(ifile);
                     80:        fseek(ifile, 0L, SEEK_SET);
                     81: #else
                     82:        ifile = fileno( inFile );
                     83:        q = lseek(ifile, 0L, SEEK_END);
                     84:        lseek(ifile, 0L, SEEK_SET);
                     85: #endif /* VMS */
                     86: 
                     87:        m = (q == 0) ? STORE : DEFLATE;
                     88: 
                     89:   if (m == DEFLATE) {
                     90:         bi_init(y);
                     91:         att = UNKNOWN;
                     92:         ct_init(&att, &m);
                     93:         lm_init(level, &flg);
                     94:         /* s = */ deflate();
                     95:   }
                     96: 
                     97:   return(0);
                     98: }
                     99: 
                    100: int read_buf(buf, size)
                    101:   char far *buf;
                    102:   unsigned size;
                    103: /* Read a new buffer from the current input file, and update the crc and
                    104:  * input file size.
                    105:  * IN assertion: size >= 2 (for end-of-line translation) */
                    106: {
                    107:   unsigned len;
                    108: 
                    109:   len = zread(ifile, buf, size);
                    110:   if (len == (unsigned)EOF || len == 0) return len;
                    111:   return len;
                    112: }

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