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(svn r27035) -Feature: Support .txt.xz changelog, readme and license files in basesets, newgrfs, etc

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matthijs 2014-10-23 10:49:19 +00:00
parent 983d286ebf
commit 0c0f660059
1 changed files with 70 additions and 1 deletions
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71
src/textfile_gui.cpp
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@ -25,6 +25,10 @@
#include <zlib.h>
#endif
#if defined(WITH_LZMA)
#include <lzma.h>
#endif
#include "safeguards.h"
/** Widgets for the textfile window. */
@ -253,6 +257,61 @@ static void Gunzip(byte **bufp, size_t *sizep)
}
#endif
#if defined(WITH_LZMA)
/**
* Do an in-memory xunzip operation. This works on a .xz or (legacy)
* .lzma file.
* @param bufp A pointer to a buffer containing the input data. This
* buffer will be freed and replaced by a buffer containing
* the uncompressed data.
* @param sizep A pointer to the buffer size. Before the call, the value
* pointed to should contain the size of the input buffer.
* After the call, it contains the size of the uncompressed
* data.
*
* When decompressing fails, *bufp is set to NULL and *sizep to 0. The
* compressed buffer passed in is still freed in this case.
*/
static void Xunzip(byte **bufp, size_t *sizep)
{
static const int BLOCKSIZE = 8192;
byte *buf = NULL;
size_t alloc_size = 0;
lzma_stream z = LZMA_STREAM_INIT;
int res;
z.next_in = *bufp;
z.avail_in = *sizep;
res = lzma_auto_decoder(&z, UINT64_MAX, LZMA_CONCATENATED);
/* Z_BUF_ERROR just means we need more space */
while (res == LZMA_OK || (res == LZMA_BUF_ERROR && z.avail_out == 0)) {
/* When we get here, we're either just starting, or
* inflate is out of output space - allocate more */
alloc_size += BLOCKSIZE;
z.avail_out += BLOCKSIZE;
buf = ReallocT(buf, alloc_size);
z.next_out = buf + alloc_size - z.avail_out;
res = lzma_code(&z, LZMA_FINISH);
}
free(*bufp);
lzma_end(&z);
if (res == LZMA_STREAM_END) {
*bufp = buf;
*sizep = alloc_size - z.avail_out;
} else {
/* Something went wrong */
*bufp = NULL;
*sizep = 0;
free(buf);
}
}
#endif
/**
* Loads the textfile text from file and setup #lines.
*/
@ -273,14 +332,21 @@ static void Gunzip(byte **bufp, size_t *sizep)
if (read != filesize) return;
#if defined(WITH_ZLIB)
#if defined(WITH_ZLIB) || defined(WITH_LZMA)
const char *suffix = strrchr(textfile, '.');
if (suffix == NULL) return;
#endif
#if defined(WITH_ZLIB)
/* In-place gunzip */
if (strcmp(suffix, ".gz") == 0) Gunzip((byte**)&this->text, &filesize);
#endif
#if defined(WITH_LZMA)
/* In-place xunzip */
if (strcmp(suffix, ".xz") == 0) Xunzip((byte**)&this->text, &filesize);
#endif
if (!this->text) return;
/* Add space for trailing \0 */
@ -340,6 +406,9 @@ const char *GetTextfile(TextfileType type, Subdirectory dir, const char *filenam
"txt",
#if defined(WITH_ZLIB)
"txt.gz",
#endif
#if defined(WITH_LZMA)
"txt.xz",
#endif
};