Python code coverage for Modules/zlib/compress.c

#	count	content
1	n/a	/* compress.c -- compress a memory buffer
2	n/a	* Copyright (C) 1995-2005, 2014, 2016 Jean-loup Gailly, Mark Adler
3	n/a	* For conditions of distribution and use, see copyright notice in zlib.h
4	n/a	*/
5	n/a
6	n/a	/* @(#) $Id$ */
7	n/a
8	n/a	#define ZLIB_INTERNAL
9	n/a	#include "zlib.h"
10	n/a
11	n/a	/* ===========================================================================
12	n/a	Compresses the source buffer into the destination buffer. The level
13	n/a	parameter has the same meaning as in deflateInit. sourceLen is the byte
14	n/a	length of the source buffer. Upon entry, destLen is the total size of the
15	n/a	destination buffer, which must be at least 0.1% larger than sourceLen plus
16	n/a	12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
17	n/a
18	n/a	compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
19	n/a	memory, Z_BUF_ERROR if there was not enough room in the output buffer,
20	n/a	Z_STREAM_ERROR if the level parameter is invalid.
21	n/a	*/
22	n/a	int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
23	n/a	Bytef *dest;
24	n/a	uLongf *destLen;
25	n/a	const Bytef *source;
26	n/a	uLong sourceLen;
27	n/a	int level;
28	n/a	{
29	n/a	z_stream stream;
30	n/a	int err;
31	n/a	const uInt max = (uInt)-1;
32	n/a	uLong left;
33	n/a
34	n/a	left = *destLen;
35	n/a	*destLen = 0;
36	n/a
37	n/a	stream.zalloc = (alloc_func)0;
38	n/a	stream.zfree = (free_func)0;
39	n/a	stream.opaque = (voidpf)0;
40	n/a
41	n/a	err = deflateInit(&stream, level);
42	n/a	if (err != Z_OK) return err;
43	n/a
44	n/a	stream.next_out = dest;
45	n/a	stream.avail_out = 0;
46	n/a	stream.next_in = (z_const Bytef *)source;
47	n/a	stream.avail_in = 0;
48	n/a
49	n/a	do {
50	n/a	if (stream.avail_out == 0) {
51	n/a	stream.avail_out = left > (uLong)max ? max : (uInt)left;
52	n/a	left -= stream.avail_out;
53	n/a	}
54	n/a	if (stream.avail_in == 0) {
55	n/a	stream.avail_in = sourceLen > (uLong)max ? max : (uInt)sourceLen;
56	n/a	sourceLen -= stream.avail_in;
57	n/a	}
58	n/a	err = deflate(&stream, sourceLen ? Z_NO_FLUSH : Z_FINISH);
59	n/a	} while (err == Z_OK);
60	n/a
61	n/a	*destLen = stream.total_out;
62	n/a	deflateEnd(&stream);
63	n/a	return err == Z_STREAM_END ? Z_OK : err;
64	n/a	}
65	n/a
66	n/a	/* ===========================================================================
67	n/a	*/
68	n/a	int ZEXPORT compress (dest, destLen, source, sourceLen)
69	n/a	Bytef *dest;
70	n/a	uLongf *destLen;
71	n/a	const Bytef *source;
72	n/a	uLong sourceLen;
73	n/a	{
74	n/a	return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
75	n/a	}
76	n/a
77	n/a	/* ===========================================================================
78	n/a	If the default memLevel or windowBits for deflateInit() is changed, then
79	n/a	this function needs to be updated.
80	n/a	*/
81	n/a	uLong ZEXPORT compressBound (sourceLen)
82	n/a	uLong sourceLen;
83	n/a	{
84	n/a	return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
85	n/a	(sourceLen >> 25) + 13;
86	n/a	}