From 4fcff0ecc6f94dbc079f29b9636d810a16ef2ed7 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Fri, 5 Aug 2022 19:54:22 +0200
Subject: user/libc: fseek + ftell for getting a file's size

---
 src/user/app/vterm/font.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'src/user/app/vterm')

diff --git a/src/user/app/vterm/font.c b/src/user/app/vterm/font.c
index d9a4e3c..5a9dd24 100644
--- a/src/user/app/vterm/font.c
+++ b/src/user/app/vterm/font.c
@@ -13,13 +13,24 @@ void font_load(const char *path) {
 		exit(1);
 	}
 
-	const size_t cap = 8 * 1024; // TODO get file size
-	void *buf = malloc(cap);
+	void *buf;
+	long buflen;
+
+	fseek(f, 0, SEEK_END);
+	buflen = ftell(f);
+	if (buflen < 0) {
+		eprintf("can't get the size of \"%s\"", path);
+		exit(1);
+	}
+
+	buf = malloc(buflen);
 	if (!buf) {
 		eprintf("out of memory");
 		exit(1);
 	}
-	fread(buf, 1, cap, f);
+
+	fseek(f, 0, SEEK_SET);
+	fread(buf, 1, buflen, f);
 	if (ferror(f)) {
 		eprintf("error reading file");
 		exit(1);
-- 
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