Name

gzprintf — Formats and compresses the data.

Library

Libz.lib

Synopsis

#include <zlib.h>
int gzprintf (gzFile file, const char * fmt, ...);

Return Value

The gzprintf() function shall return the number of uncompressed bytes actually written, or a value less than or equal to 0 in the event of an error.

Detailed Description

The gzprintf() function shall format data as for fprintf(), and write the resulting string to the compressed file stream file.

Examples

#include <stdio.h>
#include <zlib.h>   

void Gzprintf( )
{   
    gzFile file;
    const char * fname = TESTFILE ;
    file = gzopen(fname, "wb");
    int outlen = gzprintf(file, ", %s!", "hello");
    printf("length of the output is %d",outlen);
    gzclose(file);   
}

Output

Length of the output is 8.

Errors

If file is NULL, or refers to a compressed file stream that has not been opened for writing, gzprintf() shall return Z_STREAM_ERROR. Otherwise, errors are as for gzwrite().

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