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txth: clean detection and remove rare edge case

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bnnm 2021-10-10 17:01:06 +02:00
parent 86c31d1481
commit 001befde17
1 changed files with 28 additions and 35 deletions
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55
src/meta/txth.c
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@ -654,7 +654,7 @@ static VGMSTREAM* init_subfile(txth_header* txth) {
* - etc
* to avoid it we set a particular fake extension and detect it when reading .txth
*/
strcpy(extension, "subfile_txth.");
strcpy(extension, ".subfile_txth.");
strcat(extension, txth->subfile_extension);
sf_sub = setup_subfile_streamfile(txth->sf_body, txth->subfile_offset, txth->subfile_size, extension);
@ -728,50 +728,43 @@ fail:
static STREAMFILE* open_txth(STREAMFILE* sf) {
char basename[PATH_LIMIT];
char filename[PATH_LIMIT];
char fileext[PATH_LIMIT];
const char *subext;
const char* base_ext;
const char* txth_ext;
STREAMFILE* sf_text;
/* try "(path/)(name.ext).txth" */
get_streamfile_name(sf,filename,PATH_LIMIT);
if (strstr(filename, "subfile_txth") != NULL)
return NULL; /* detect special case of subfile-within-subfile */
strcat(filename, ".txth");
sf_text = open_streamfile(sf,filename);
if (sf_text) return sf_text;
/* try "(path/)(.sub.ext).txth" */
get_streamfile_basename(sf,basename,PATH_LIMIT);
subext = filename_extension(basename);
if (subext != NULL && subext[0] != '\0') {
get_streamfile_path(sf,filename,PATH_LIMIT);
get_streamfile_ext(sf,fileext,PATH_LIMIT);
strcat(filename,".");
strcat(filename, subext);
strcat(filename,".");
strcat(filename, fileext);
strcat(filename, ".txth");
get_streamfile_name(sf, filename, sizeof(filename));
if (strstr(filename, ".subfile_txth") != NULL)
return NULL; /* detect special case of subfile-within-subfile */
base_ext = filename_extension(filename);
concatn(sizeof(filename), filename, ".txth");
txth_ext = filename_extension(filename);
/* try "(path/)(name.ext).txth" */
{
/* full filename, already prepared */
sf_text = open_streamfile(sf, filename);
if (sf_text) return sf_text;
}
/* try "(path/)(.ext).txth" */
get_streamfile_path(sf,filename,PATH_LIMIT);
get_streamfile_ext(sf,fileext,PATH_LIMIT);
strcat(filename,".");
strcat(filename, fileext);
strcat(filename, ".txth");
sf_text = open_streamfile(sf,filename);
if (base_ext) {
base_ext--; //get_streamfile_path(sf, filename, sizeof(filename));
sf_text = open_streamfile_by_filename(sf, base_ext);
if (sf_text) return sf_text;
}
/* try "(path/).txth" */
get_streamfile_path(sf,filename,PATH_LIMIT);
strcat(filename, ".txth");
sf_text = open_streamfile(sf,filename);
if (txth_ext) {
txth_ext--; /* points to "txth" due to the concat */
sf_text = open_streamfile_by_filename(sf, txth_ext);
if (sf_text) return sf_text;
}
/* not found */
return NULL;