make chunk size configurable, remove unneeded copying

1 files changed, 11 insertions, 4 deletions

diff --git a/strio.h b/strio.h
index 20d0ddf..6aaf741 100644
--- a/strio.h
+++ b/strio.h
@@ -5,17 +5,24 @@
 
 #include "str.h"
 
+#ifndef STRIO_CHUNK_SIZE
+#define STRIO_CHUNK_SIZE 256
+#endif
+
 string read_whole_file(FILE *f);
 
 #ifdef STDWRM_IMPL_STR
 
+#include <stdio.h>
+
 string read_whole_file(FILE *f) {
-	char chunk[256];
 	string s;
-	DA_INIT(s);
+	DA_INIT_SIZE(s, STRIO_CHUNK_SIZE);
 	while (!feof(f)) {
-		size_t n = fread(chunk, 1, sizeof chunk, f);
-		DA_PUSH_MULT(s, chunk, n);
+		char *buf = &s[DA_LEN(s)];
+		size_t n = fread(buf, 1, STRIO_CHUNK_SIZE, f);
+		DA_FIT(s, DA_LEN(s) + n);
+		DA_LEN(s) += n;
 	}
 	DA_PUSH(s, 0);
 	return s;