init

1 files changed, 39 insertions, 0 deletions

diff --git a/src/util/file.c b/src/util/file.c
new file mode 100644
index 0000000..38eb9ba
--- /dev/null
+++ b/src/util/file.c
@@ -0,0 +1,39 @@
+#include <string.h>
+#include "file.h"
+
+FILE *file_open(str s_path, const char *mode)
+{
+    NULTERM(s_path, path)
+    return fopen(path, mode);
+}
+
+static bool file_size(FILE *file, size_t *size)
+{
+    if (fseek(file, 0, SEEK_END) == -1)
+        return false;
+    long end = ftell(file);
+    fseek(file, 0, SEEK_SET);
+    if (end == -1)
+        return false;
+    *size = end;
+    return true;
+}
+
+str file_read(FILE *file)
+{
+    size_t size;
+    if (file_size(file, &size)) {
+        str s;
+        array_alloc(&s, size);
+        s.len = fread(s.ptr, 1, size, file);
+        return s;
+    } else {
+        strbuf buf = {};
+        size_t n_read;
+        do {
+            arraybuf_grow(&buf, BUFSIZ);
+            buf.len += (n_read = fread(buf.ptr+buf.len, 1, BUFSIZ, file));
+        } while (n_read == BUFSIZ);
+        return (str) arraybuf_cast(buf);
+    }
+}