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82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/* radare - LGPL - Copyright 2014-2015 - pancake */
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#include <r_util.h>
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#include <zlib.h>
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// set a maximum output buffer of 50MB
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#define MAXOUT 50000000
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static const char *gzerr(int n) {
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const char *errors[] = {
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"",
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"file error", /* Z_ERRNO (-1) */
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"stream error", /* Z_STREAM_ERROR (-2) */
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"data error", /* Z_DATA_ERROR (-3) */
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"insufficient memory", /* Z_MEM_ERROR (-4) */
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"buffer error", /* Z_BUF_ERROR (-5) */
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"incompatible version",/* Z_VERSION_ERROR (-6) */
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};
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if (n<1 || n>6) {
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return "unknown";
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}
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return errors[n];
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}
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R_API ut8 *r_inflate(const ut8 *src, int srcLen, int *srcConsumed, int *dstLen) {
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int err = 0;
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int out_size = 0;
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ut8 *dst = NULL;
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z_stream stream;
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if (srcLen <= 0) {
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return NULL;
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}
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memset (&stream, 0, sizeof (z_stream));
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stream.avail_in = srcLen;
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stream.next_in = (Bytef *) src;
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stream.zalloc = Z_NULL;
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stream.zfree = Z_NULL;
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stream.opaque = Z_NULL;
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// + 32 tells zlib not to care whether the stream is a zlib or gzip stream
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if (inflateInit2 (&stream, MAX_WBITS + 32) != Z_OK) {
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return NULL;
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}
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do {
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if (stream.avail_out == 0) {
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if (! (dst = realloc (dst, stream.total_out + srcLen*2)))
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goto err_exit;
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out_size += srcLen*2;
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if (out_size > MAXOUT)
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goto err_exit;
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stream.next_out = dst + stream.total_out;
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stream.avail_out = srcLen * 2;
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}
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err = inflate (&stream, Z_FINISH);
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if (err<0) {
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eprintf ("inflate error: %d %s\n",
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err, gzerr (-err));
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goto err_exit;
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}
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} while (err != Z_STREAM_END);
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if (dstLen) {
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*dstLen = stream.total_out;
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}
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if (srcConsumed) {
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*srcConsumed = (const ut8*)stream.next_in-(const ut8*)src;
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}
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inflateEnd (&stream);
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return dst;
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err_exit:
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inflateEnd (&stream);
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free (dst);
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return NULL;
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}
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