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Merge pull request #72 from twolife/exePath

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small fix in FileSystem abstraction
This commit is contained in:
ptitSeb 2023-07-24 14:46:17 +02:00 committed by GitHub
commit 698af6d1f8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 38 additions and 1 deletions
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39
Sources/Engine/Base/Unix/UnixFileSystem.cpp
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@ -22,6 +22,43 @@
ENGINE_API CFileSystem *_pFileSystem = NULL;
// Stolen from SDL2/src/filesystem/unix/SDL_sysfilesystem.c
static char * readSymLink(const char *path)
{
char *retval = NULL;
ssize_t len = 64;
ssize_t rc = -1;
while (1)
{
char *ptr = (char *) SDL_realloc(retval, (size_t) len);
if (ptr == NULL) {
SDL_OutOfMemory();
break;
}
retval = ptr;
rc = readlink(path, retval, len);
if (rc == -1) {
break; /* not a symlink, i/o error, etc. */
} else if (rc < len) {
retval[rc] = '\0'; /* readlink doesn't null-terminate. */
/* try to shrink buffer... */
ptr = (char *) SDL_realloc(retval, strlen(retval) + 1);
if (ptr != NULL)
retval = ptr; /* oh well if it failed. */
return retval; /* we're good to go. */
}
len *= 2; /* grow buffer, try again. */
}
SDL_free(retval);
return NULL;
}
class CUnixFileSystem : public CFileSystem
{
@ -77,7 +114,7 @@ BOOL CFileSystem::IsDirectory(const char *fname)
CUnixFileSystem::CUnixFileSystem(const char *argv0, const char *gamename)
{
exePath = SDL_GetBasePath();
exePath = readSymLink("/proc/self/exe");
userDir = SDL_GetPrefPath("Serious Engine", gamename);
}