添加视频压缩代码

others/C/video_compression/src/file_utils.c

@@ -0,0 +1,39 @@
+#include "file_utils.h"
+#include <sys/stat.h>
+#include <string.h>
+#include <stdio.h>
+
+bool file_exists(const char* path) {
+    if (path == NULL) {
+        return false;
+    }
+
+    struct stat buffer;
+    return stat(path, &buffer) == 0;
+}
+
+long file_size(const char* path) {
+    if (path == NULL) {
+        return -1;
+    }
+
+    struct stat buffer;
+    if (stat(path, &buffer) != 0) {
+        return -1;
+    }
+
+    return (long)buffer.st_size;
+}
+
+const char* file_extension(const char* path) {
+    if (path == NULL) {
+        return NULL;
+    }
+
+    const char* dot = strrchr(path, '.');
+    if (dot == NULL || dot == path) {
+        return NULL;
+    }
+
+    return dot;
+}