io: add mp_save_file

Move from vo_gpu_next.c to io.c and return result.

2 files changed, 30 insertions, 0 deletions

diff --git a/osdep/io.c b/osdep/io.c
index 93f97b5ecf..617764c16a 100644
--- a/osdep/io.c
+++ b/osdep/io.c
@@ -918,3 +918,32 @@ int mp_mkostemps(char *template, int suffixlen, int flags)
     errno = EEXIST;
     return -1;
 }
+
+bool mp_save_to_file(const char *filepath, const void *data, size_t size)
+{
+    assert(filepath && data && size);
+
+    bool result = false;
+    char *tmp = talloc_asprintf(NULL, "%sXXXXXX", filepath);
+    int fd = mkstemp(tmp);
+    if (fd < 0)
+        goto done;
+    FILE *cache = fdopen(fd, "wb");
+    if (!cache) {
+        close(fd);
+        unlink(tmp);
+        goto done;
+    }
+    size_t written = fwrite(data, size, 1, cache);
+    int ret = fclose(cache);
+    if (written > 0 && !ret) {
+        ret = rename(tmp, filepath);
+        result = !ret;
+    } else {
+        unlink(tmp);
+    }
+
+done:
+    talloc_free(tmp);
+    return result;
+}
diff --git a/osdep/io.h b/osdep/io.h
index 0a0d01eb05..31d17154ed 100644
--- a/osdep/io.h
+++ b/osdep/io.h
@@ -240,5 +240,6 @@ extern char **environ;
 #endif /* __MINGW32__ */
 
 int mp_mkostemps(char *template, int suffixlen, int flags);
+bool mp_save_to_file(const char *filepath, const void *data, size_t size);
 
 #endif