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yap-6.3
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handle null pointers and memory streams

This commit is contained in:
vscosta 2016-04-08 01:18:28 -07:00
parent c3488eeaed
commit 948c8e7cbb
1 changed files with 22 additions and 8 deletions
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30
os/streams.c
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@ -93,6 +93,7 @@ static char SccsId[] = "%W% %G%";
#if _MSC_VER || defined(__MINGW32__)
#define SYSTEM_STAT _stat
//#include <winbase.h>
#else
#define SYSTEM_STAT stat
#endif
@ -246,7 +247,20 @@ has_reposition(int sno,
}
}
char *Yap_guessFileName(int f, int sno, char *nameb, size_t max) {
char *Yap_guessFileName(FILE* file, int sno, char *nameb, size_t max) {
if (!nameb) {
nameb = malloc(max(256, max));
}
if (!file) {
strcpy(nameb, "memory buffer");
return nameb;
}
int f = fileno(file);
if (f < 0) {
strcpy(nameb, "???");
return nameb;
}
#if __linux__
char path[256];
if (snprintf(path, 255, "/proc/self/fd/%d", f) && readlink(path, nameb, max))
@ -255,15 +269,15 @@ char *Yap_guessFileName(int f, int sno, char *nameb, size_t max) {
if (fcntl(f, F_GETPATH, nameb) != -1) {
return nameb;
}
#elif __WIN32_
FILE_NAME_INFO *fni = (FILE_NAME_INFO *)malloc(sizeof(FILE_NAME_INFO) +
sizeof(WCHAR) * MAXPATHLEN);
HANDLE handle = (HANDLE)_get_osfhandle(f);
if (GetFileInformationByHandleEx(handle, FileNameInfo, &fni, max)) {
#else
TCHAR path[MAX_PATH+1];
if (!GetFullPathName(path, MAX_PATH, path, NULL))
return NULL;
else {
int i;
char *ptr = nameb;
for (i = 0; i < fni->FileNameLength; i++)
*ptr = _PL__utf8_put_char(ptr, fni->FileName[i]);
for (i = 0; i < strlen(path); i++)
ptr += put_utf8(ptr, path[i]);
*ptr = '\0';
return nameb;
}