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(svn r27034) -Feature: Support .txt.gz changelog, readme and license files in basesets, newgrfs, etc

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matthijs 2014-10-23 10:49:16 +00:00
parent 3596bee92f
commit fa0860db9d
1 changed files with 76 additions and 1 deletions
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77
src/textfile_gui.cpp
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@ -21,6 +21,10 @@
#include "table/strings.h"
#if defined(WITH_ZLIB)
#include <zlib.h>
#endif
#include "safeguards.h"
/** Widgets for the textfile window. */
@ -193,6 +197,62 @@ void TextfileWindow::SetupScrollbars()
#endif /* WITH_FREETYPE */
}
#if defined(WITH_ZLIB)
/**
* Do an in-memory gunzip operation. This works on a raw deflate stream,
* or a file with gzip or zlib header.
* @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 Gunzip(byte **bufp, size_t *sizep)
{
static const int BLOCKSIZE = 8192;
byte *buf = NULL;
size_t alloc_size = 0;
z_stream z;
int res;
memset(&z, 0, sizeof(z));
z.next_in = *bufp;
z.avail_in = *sizep;
/* window size = 15, add 32 to enable gzip or zlib header processing */
res = inflateInit2(&z, 15 + 32);
/* Z_BUF_ERROR just means we need more space */
while (res == Z_OK || (res == Z_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 = inflate(&z, Z_FINISH);
}
free(*bufp);
inflateEnd(&z);
if (res == Z_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.
*/
@ -207,12 +267,24 @@ void TextfileWindow::SetupScrollbars()
FILE *handle = FioFOpenFile(textfile, "rb", dir, &filesize);
if (handle == NULL) return;
this->text = ReallocT(this->text, filesize + 1);
this->text = ReallocT(this->text, filesize);
size_t read = fread(this->text, 1, filesize, handle);
fclose(handle);
if (read != filesize) return;
#if defined(WITH_ZLIB)
const char *suffix = strrchr(textfile, '.');
if (suffix == NULL) return;
/* In-place gunzip */
if (strcmp(suffix, ".gz") == 0) Gunzip((byte**)&this->text, &filesize);
#endif
if (!this->text) return;
/* Add space for trailing \0 */
this->text = ReallocT(this->text, filesize + 1);
this->text[filesize] = '\0';
/* Replace tabs and line feeds with a space since str_validate removes those. */
@ -266,6 +338,9 @@ const char *GetTextfile(TextfileType type, Subdirectory dir, const char *filenam
static const char * const exts[] = {
"txt",
#if defined(WITH_ZLIB)
"txt.gz",
#endif
};
for (size_t i = 0; i < lengthof(exts); i++) {