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https://github.com/vgmstream/vgmstream.git
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dos2unix
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@383 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
halleyscometsw
parent
55fba8f190
commit
70c7fb1532
408
src/streamfile.c
408
src/streamfile.c
@ -1,207 +1,207 @@
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#ifndef _MSC_VER
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#include <unistd.h>
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#endif
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#include "streamfile.h"
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#include "util.h"
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typedef struct {
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STREAMFILE sf;
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FILE * infile;
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off_t offset;
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size_t validsize;
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uint8_t * buffer;
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size_t buffersize;
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char name[260];
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#ifdef PROFILE_STREAMFILE
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size_t bytes_read;
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int error_count;
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#endif
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} STDIOSTREAMFILE;
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static STREAMFILE * open_stdio_streamfile_buffer_by_FILE(FILE *infile,const char * const filename, size_t buffersize);
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static size_t read_the_rest(uint8_t * dest, off_t offset, size_t length, STDIOSTREAMFILE * streamfile) {
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size_t length_read_total=0;
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/* is the beginning at least there? */
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if (offset >= streamfile->offset && offset < streamfile->offset+streamfile->validsize) {
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size_t length_read;
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off_t offset_into_buffer = offset-streamfile->offset;
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length_read = streamfile->validsize-offset_into_buffer;
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memcpy(dest,streamfile->buffer+offset_into_buffer,length_read);
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length_read_total += length_read;
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length -= length_read;
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offset += length_read;
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dest += length_read;
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}
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/* TODO: What would make more sense here is to read the whole request
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* at once into the dest buffer, as it must be large enough, and then
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* copy some part of that into our own buffer.
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* The destination buffer is supposed to be much smaller than the
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* STREAMFILE buffer, though. Maybe we should only ever return up
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* to the buffer size to avoid having to deal with things like this
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* which are outside of my intended use.
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*/
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/* read as much of the beginning of the request as possible, proceed */
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while (length>0) {
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size_t length_to_read;
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size_t length_read=0;
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streamfile->validsize=0;
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if (fseeko(streamfile->infile,offset,SEEK_SET)) return length_read;
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streamfile->offset=offset;
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/* decide how much must be read this time */
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if (length>streamfile->buffersize) length_to_read=streamfile->buffersize;
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else length_to_read=length;
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/* always try to fill the buffer */
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length_read = fread(streamfile->buffer,1,streamfile->buffersize,streamfile->infile);
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streamfile->validsize=length_read;
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#ifdef PROFILE_STREAMFILE
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if (ferror(streamfile->infile)) {
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clearerr(streamfile->infile);
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streamfile->error_count++;
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}
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streamfile->bytes_read += length_read;
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#endif
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/* if we can't get enough to satisfy the request we give up */
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if (length_read < length_to_read) {
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memcpy(dest,streamfile->buffer,length_read);
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length_read_total+=length_read;
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return length_read_total;
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}
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/* use the new buffer */
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memcpy(dest,streamfile->buffer,length_to_read);
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length_read_total+=length_to_read;
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length-=length_to_read;
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dest+=length_to_read;
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offset+=length_to_read;
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}
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return length_read_total;
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}
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static size_t read_stdio(STDIOSTREAMFILE *streamfile,uint8_t * dest, off_t offset, size_t length)
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{
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// read
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if (!streamfile || !dest || length<=0) return 0;
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/* if entire request is within the buffer */
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if (offset >= streamfile->offset && offset+length <= streamfile->offset+streamfile->validsize) {
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memcpy(dest,streamfile->buffer+(offset-streamfile->offset),length);
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return length;
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}
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return read_the_rest(dest,offset,length,streamfile);
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}
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static void close_stdio(STDIOSTREAMFILE * streamfile) {
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fclose(streamfile->infile);
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free(streamfile->buffer);
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free(streamfile);
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}
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static size_t get_size_stdio(STDIOSTREAMFILE * streamfile) {
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fseeko(streamfile->infile,0,SEEK_END);
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return ftello(streamfile->infile);
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}
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static off_t get_offset_stdio(STDIOSTREAMFILE *streamFile) {
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return streamFile->offset;
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}
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static void get_name_stdio(STDIOSTREAMFILE *streamfile,char *buffer,size_t length) {
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strcpy(buffer,streamfile->name);
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}
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#ifdef PROFILE_STREAMFILE
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static size_t get_bytes_read_stdio(STDIOSTREAMFILE *streamFile) {
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return streamFile->bytes_read;
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}
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static size_t get_error_count_stdio(STDIOSTREAMFILE *streamFile) {
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return streamFile->error_count;
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}
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#endif
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static STREAMFILE *open_stdio(STDIOSTREAMFILE *streamFile,const char * const filename,size_t buffersize) {
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int newfd;
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FILE *newfile;
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STREAMFILE *newstreamFile;
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if (!filename)
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return NULL;
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// if same name, duplicate the file pointer we already have open
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if (!strcmp(streamFile->name,filename)) {
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if (((newfd = dup(fileno(streamFile->infile))) >= 0) &&
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(newfile = fdopen( newfd, "rb" )))
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{
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newstreamFile = open_stdio_streamfile_buffer_by_FILE(newfile,filename,buffersize);
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if (newstreamFile) {
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return newstreamFile;
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}
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// failure, close it and try the default path (which will probably fail a second time)
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fclose(newfile);
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}
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}
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// a normal open, open a new file
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return open_stdio_streamfile_buffer(filename,buffersize);
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}
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static STREAMFILE * open_stdio_streamfile_buffer_by_FILE(FILE *infile,const char * const filename, size_t buffersize) {
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uint8_t * buffer;
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STDIOSTREAMFILE * streamfile;
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buffer = calloc(buffersize,1);
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if (!buffer) {
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return NULL;
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}
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streamfile = calloc(1,sizeof(STDIOSTREAMFILE));
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if (!streamfile) {
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free(buffer);
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return NULL;
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}
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streamfile->sf.read = (void*)read_stdio;
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streamfile->sf.get_size = (void*)get_size_stdio;
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streamfile->sf.get_offset = (void*)get_offset_stdio;
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streamfile->sf.get_name = (void*)get_name_stdio;
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streamfile->sf.get_realname = (void*)get_name_stdio;
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streamfile->sf.open = (void*)open_stdio;
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streamfile->sf.close = (void*)close_stdio;
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#ifdef PROFILE_STREAMFILE
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streamfile->sf.get_bytes_read = (void*)get_bytes_read_stdio;
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streamfile->sf.get_error_count = (void*)get_error_count_stdio;
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#endif
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streamfile->infile = infile;
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streamfile->buffersize = buffersize;
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streamfile->buffer = buffer;
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strcpy(streamfile->name,filename);
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return &streamfile->sf;
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}
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STREAMFILE * open_stdio_streamfile_buffer(const char * const filename, size_t buffersize) {
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FILE * infile;
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STREAMFILE *streamFile;
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infile = fopen(filename,"rb");
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if (!infile) return NULL;
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streamFile = open_stdio_streamfile_buffer_by_FILE(infile,filename,buffersize);
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if (!streamFile) {
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fclose(infile);
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}
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return streamFile;
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}
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#ifndef _MSC_VER
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#include <unistd.h>
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#endif
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#include "streamfile.h"
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#include "util.h"
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typedef struct {
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STREAMFILE sf;
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FILE * infile;
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off_t offset;
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size_t validsize;
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uint8_t * buffer;
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size_t buffersize;
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char name[260];
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#ifdef PROFILE_STREAMFILE
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size_t bytes_read;
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int error_count;
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#endif
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} STDIOSTREAMFILE;
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static STREAMFILE * open_stdio_streamfile_buffer_by_FILE(FILE *infile,const char * const filename, size_t buffersize);
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static size_t read_the_rest(uint8_t * dest, off_t offset, size_t length, STDIOSTREAMFILE * streamfile) {
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size_t length_read_total=0;
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/* is the beginning at least there? */
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if (offset >= streamfile->offset && offset < streamfile->offset+streamfile->validsize) {
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size_t length_read;
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off_t offset_into_buffer = offset-streamfile->offset;
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length_read = streamfile->validsize-offset_into_buffer;
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memcpy(dest,streamfile->buffer+offset_into_buffer,length_read);
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length_read_total += length_read;
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length -= length_read;
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offset += length_read;
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dest += length_read;
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}
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/* TODO: What would make more sense here is to read the whole request
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* at once into the dest buffer, as it must be large enough, and then
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* copy some part of that into our own buffer.
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* The destination buffer is supposed to be much smaller than the
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* STREAMFILE buffer, though. Maybe we should only ever return up
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* to the buffer size to avoid having to deal with things like this
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* which are outside of my intended use.
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*/
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/* read as much of the beginning of the request as possible, proceed */
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while (length>0) {
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size_t length_to_read;
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size_t length_read=0;
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streamfile->validsize=0;
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if (fseeko(streamfile->infile,offset,SEEK_SET)) return length_read;
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streamfile->offset=offset;
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/* decide how much must be read this time */
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if (length>streamfile->buffersize) length_to_read=streamfile->buffersize;
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else length_to_read=length;
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/* always try to fill the buffer */
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length_read = fread(streamfile->buffer,1,streamfile->buffersize,streamfile->infile);
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streamfile->validsize=length_read;
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#ifdef PROFILE_STREAMFILE
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if (ferror(streamfile->infile)) {
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clearerr(streamfile->infile);
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streamfile->error_count++;
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}
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streamfile->bytes_read += length_read;
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#endif
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/* if we can't get enough to satisfy the request we give up */
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if (length_read < length_to_read) {
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memcpy(dest,streamfile->buffer,length_read);
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length_read_total+=length_read;
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return length_read_total;
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}
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/* use the new buffer */
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memcpy(dest,streamfile->buffer,length_to_read);
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length_read_total+=length_to_read;
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length-=length_to_read;
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dest+=length_to_read;
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offset+=length_to_read;
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}
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return length_read_total;
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}
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static size_t read_stdio(STDIOSTREAMFILE *streamfile,uint8_t * dest, off_t offset, size_t length)
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{
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// read
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if (!streamfile || !dest || length<=0) return 0;
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/* if entire request is within the buffer */
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if (offset >= streamfile->offset && offset+length <= streamfile->offset+streamfile->validsize) {
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memcpy(dest,streamfile->buffer+(offset-streamfile->offset),length);
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return length;
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}
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return read_the_rest(dest,offset,length,streamfile);
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}
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static void close_stdio(STDIOSTREAMFILE * streamfile) {
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fclose(streamfile->infile);
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free(streamfile->buffer);
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free(streamfile);
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}
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static size_t get_size_stdio(STDIOSTREAMFILE * streamfile) {
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fseeko(streamfile->infile,0,SEEK_END);
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return ftello(streamfile->infile);
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}
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static off_t get_offset_stdio(STDIOSTREAMFILE *streamFile) {
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return streamFile->offset;
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}
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static void get_name_stdio(STDIOSTREAMFILE *streamfile,char *buffer,size_t length) {
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strcpy(buffer,streamfile->name);
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}
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#ifdef PROFILE_STREAMFILE
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static size_t get_bytes_read_stdio(STDIOSTREAMFILE *streamFile) {
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return streamFile->bytes_read;
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}
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static size_t get_error_count_stdio(STDIOSTREAMFILE *streamFile) {
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return streamFile->error_count;
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}
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#endif
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static STREAMFILE *open_stdio(STDIOSTREAMFILE *streamFile,const char * const filename,size_t buffersize) {
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int newfd;
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FILE *newfile;
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STREAMFILE *newstreamFile;
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if (!filename)
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return NULL;
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// if same name, duplicate the file pointer we already have open
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if (!strcmp(streamFile->name,filename)) {
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if (((newfd = dup(fileno(streamFile->infile))) >= 0) &&
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(newfile = fdopen( newfd, "rb" )))
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{
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newstreamFile = open_stdio_streamfile_buffer_by_FILE(newfile,filename,buffersize);
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if (newstreamFile) {
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return newstreamFile;
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}
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// failure, close it and try the default path (which will probably fail a second time)
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fclose(newfile);
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}
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}
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// a normal open, open a new file
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return open_stdio_streamfile_buffer(filename,buffersize);
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}
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static STREAMFILE * open_stdio_streamfile_buffer_by_FILE(FILE *infile,const char * const filename, size_t buffersize) {
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uint8_t * buffer;
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STDIOSTREAMFILE * streamfile;
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buffer = calloc(buffersize,1);
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if (!buffer) {
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return NULL;
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}
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streamfile = calloc(1,sizeof(STDIOSTREAMFILE));
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if (!streamfile) {
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free(buffer);
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return NULL;
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}
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streamfile->sf.read = (void*)read_stdio;
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streamfile->sf.get_size = (void*)get_size_stdio;
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streamfile->sf.get_offset = (void*)get_offset_stdio;
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streamfile->sf.get_name = (void*)get_name_stdio;
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streamfile->sf.get_realname = (void*)get_name_stdio;
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streamfile->sf.open = (void*)open_stdio;
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streamfile->sf.close = (void*)close_stdio;
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#ifdef PROFILE_STREAMFILE
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streamfile->sf.get_bytes_read = (void*)get_bytes_read_stdio;
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streamfile->sf.get_error_count = (void*)get_error_count_stdio;
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#endif
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streamfile->infile = infile;
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streamfile->buffersize = buffersize;
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streamfile->buffer = buffer;
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strcpy(streamfile->name,filename);
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return &streamfile->sf;
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}
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STREAMFILE * open_stdio_streamfile_buffer(const char * const filename, size_t buffersize) {
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FILE * infile;
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STREAMFILE *streamFile;
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infile = fopen(filename,"rb");
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if (!infile) return NULL;
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streamFile = open_stdio_streamfile_buffer_by_FILE(infile,filename,buffersize);
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if (!streamFile) {
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fclose(infile);
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}
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return streamFile;
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}
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/* Read a line into dst. The source files are MS-DOS style,
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* separated (not terminated) by CRLF. Return 1 if the full line was
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