Add sizep param to mg_file_read()

src/util.c

@@ -33,7 +33,7 @@ int64_t mg_file_size(const char *path) {
 #endif
 }
 
-char *mg_file_read(const char *path) {
+char *mg_file_read(const char *path, size_t *sizep) {
   FILE *fp;
   char *data = NULL;
   size_t size = (size_t) mg_file_size(path);
@@ -45,6 +45,7 @@ char *mg_file_read(const char *path) {
         data = NULL;
       } else {
         data[size] = '\0';
+        if (sizep != NULL) *sizep = size;
       }
     }
     fclose(fp);

src/util.h

@@ -3,7 +3,7 @@
 #include "arch.h"
 #include "str.h"
 
-char *mg_file_read(const char *path);
+char *mg_file_read(const char *path, size_t *size);
 int64_t mg_file_size(const char *path);
 bool mg_file_write(const char *path, const void *buf, size_t len);
 bool mg_file_printf(const char *path, const char *fmt, ...);