zpipe.c File Reference

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "zlib.h"

Go to the source code of this file.

Macros
#define	SET_BINARY_MODE(file)
#define	CHUNK   16384

Functions
int	def (FILE *source, FILE *dest, int level)
int	inf (FILE *source, FILE *dest)
void	zerr (int ret)
int	main (int argc, char **argv)

Macro Definition Documentation

CHUNK

#define CHUNK   16384

Definition at line 28 of file zpipe.c.

SET_BINARY_MODE

#define SET_BINARY_MODE

(

file

)

Definition at line 25 of file zpipe.c.

Function Documentation

def()

int def	(	FILE *	source,
		FILE *	dest,
		int	level
	)

Definition at line 36 of file zpipe.c.

{
    int ret, flush;
    unsigned have;
    z_stream strm;
    unsigned char in[CHUNK];
    unsigned char out[CHUNK];
 
    /* allocate deflate state */
    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    ret = deflateInit(&strm, level);
    if (ret != Z_OK)
        return ret;
 
    /* compress until end of file */
    do {
        strm.avail_in = fread(in, 1, CHUNK, source);
        if (ferror(source)) {
            (void)deflateEnd(&strm);
            return Z_ERRNO;
        }
        flush = feof(source) ? Z_FINISH : Z_NO_FLUSH;
        strm.next_in = in;
 
        /* run deflate() on input until output buffer not full, finish
           compression if all of source has been read in */
        do {
            strm.avail_out = CHUNK;
            strm.next_out = out;
            ret = deflate(&strm, flush);    /* no bad return value */
            assert(ret != Z_STREAM_ERROR);  /* state not clobbered */
            have = CHUNK - strm.avail_out;
            if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
                (void)deflateEnd(&strm);
                return Z_ERRNO;
            }
        } while (strm.avail_out == 0);
        assert(strm.avail_in == 0);     /* all input will be used */
 
        /* done when last data in file processed */
    } while (flush != Z_FINISH);
    assert(ret == Z_STREAM_END);        /* stream will be complete */
 
    /* clean up and return */
    (void)deflateEnd(&strm);
    return Z_OK;
}

References assert(), lzma_stream::avail_in, lzma_stream::avail_out, CHUNK, deflate(), deflateEnd(), deflateInit, dest, in, level, lzma_stream::next_in, lzma_stream::next_out, out, source, strm, Z_ERRNO, Z_FINISH, Z_NO_FLUSH, Z_NULL, Z_OK, Z_STREAM_END, and Z_STREAM_ERROR.

Referenced by __show_status_yesno(), _zip_ef_clone(), getArg(), main(), parse_attr_value(), parse_def(), parse_offset(), parse_type(), partcompress(), recompress(), rz_cmd_alias(), rz_cons_yesno(), rz_lang_def_free(), rz_lang_define(), rz_lang_prompt(), rz_lang_undef(), rz_reg_profile_def_free(), rz_reg_set_profile_string(), rz_reg_set_reg_profile(), and wasm_dis().

inf()

int inf	(	FILE *	source,
		FILE *	dest
	)

Definition at line 92 of file zpipe.c.

{
    int ret;
    unsigned have;
    z_stream strm;
    unsigned char in[CHUNK];
    unsigned char out[CHUNK];
 
    /* allocate inflate state */
    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    strm.avail_in = 0;
    strm.next_in = Z_NULL;
    ret = inflateInit(&strm);
    if (ret != Z_OK)
        return ret;
 
    /* decompress until deflate stream ends or end of file */
    do {
        strm.avail_in = fread(in, 1, CHUNK, source);
        if (ferror(source)) {
            (void)inflateEnd(&strm);
            return Z_ERRNO;
        }
        if (strm.avail_in == 0)
            break;
        strm.next_in = in;
 
        /* run inflate() on input until output buffer not full */
        do {
            strm.avail_out = CHUNK;
            strm.next_out = out;
            ret = inflate(&strm, Z_NO_FLUSH);
            assert(ret != Z_STREAM_ERROR);  /* state not clobbered */
            switch (ret) {
            case Z_NEED_DICT:
                ret = Z_DATA_ERROR;     /* and fall through */
            case Z_DATA_ERROR:
            case Z_MEM_ERROR:
                (void)inflateEnd(&strm);
                return ret;
            }
            have = CHUNK - strm.avail_out;
            if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
                (void)inflateEnd(&strm);
                return Z_ERRNO;
            }
        } while (strm.avail_out == 0);
 
        /* done when inflate() says it's done */
    } while (ret != Z_STREAM_END);
 
    /* clean up and return */
    (void)inflateEnd(&strm);
    return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
}

References assert(), lzma_stream::avail_in, lzma_stream::avail_out, CHUNK, dest, in, inflate(), inflateEnd(), inflateInit, lzma_stream::next_in, lzma_stream::next_out, out, source, strm, Z_DATA_ERROR, Z_ERRNO, Z_MEM_ERROR, Z_NEED_DICT, Z_NO_FLUSH, Z_NULL, Z_OK, Z_STREAM_END, and Z_STREAM_ERROR.

Referenced by init_debug_info(), main(), recompress(), rz_bin_dwarf_debug_info_free(), rz_core_bin_dwarf_print_debug_info(), and rz_core_bin_load().

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 176 of file zpipe.c.

{
    int ret;
 
    /* avoid end-of-line conversions */
    SET_BINARY_MODE(stdin);
    SET_BINARY_MODE(stdout);
 
    /* do compression if no arguments */
    if (argc == 1) {
        ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION);
        if (ret != Z_OK)
            zerr(ret);
        return ret;
    }
 
    /* do decompression if -d specified */
    else if (argc == 2 && strcmp(argv[1], "-d") == 0) {
        ret = inf(stdin, stdout);
        if (ret != Z_OK)
            zerr(ret);
        return ret;
    }
 
    /* otherwise, report usage */
    else {
        fputs("zpipe usage: zpipe [-d] < source > dest\n", stderr);
        return 1;
    }
}

References argv, def(), inf(), SET_BINARY_MODE, Z_DEFAULT_COMPRESSION, Z_OK, and zerr().

zerr()

void zerr

(

int

ret

)

Definition at line 151 of file zpipe.c.

{
    fputs("zpipe: ", stderr);
    switch (ret) {
    case Z_ERRNO:
        if (ferror(stdin))
            fputs("error reading stdin\n", stderr);
        if (ferror(stdout))
            fputs("error writing stdout\n", stderr);
        break;
    case Z_STREAM_ERROR:
        fputs("invalid compression level\n", stderr);
        break;
    case Z_DATA_ERROR:
        fputs("invalid or incomplete deflate data\n", stderr);
        break;
    case Z_MEM_ERROR:
        fputs("out of memory\n", stderr);
        break;
    case Z_VERSION_ERROR:
        fputs("zlib version mismatch!\n", stderr);
    }
}

References Z_DATA_ERROR, Z_ERRNO, Z_MEM_ERROR, Z_STREAM_ERROR, and Z_VERSION_ERROR.

Referenced by main().