rp2040

commit d4403ac482871dfe027adf4ad97af6e38f6edd86
parent 92347b13b0f859dc4bec5f746533b50715378387
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Wed, 12 Apr 2023 16:30:13 +0900

use stdio functions

Diffstat:
M
tools/bincrc.c
 | 
58
++++++++++++++++++++++++++++++++++++----------------------

1 file changed, 36 insertions(+), 22 deletions(-)
diff --git a/tools/bincrc.c b/tools/bincrc.c
@@ -1,8 +1,5 @@
 #include <stdio.h>
 #include <stdint.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <unistd.h>
 
 
 void
@@ -39,48 +36,65 @@ crc32(uint8_t *idata, size_t len)
 int
 main(int argc, char *argv[])
 {
-	int src, dst;
+	FILE *src, *dst;
 	size_t isize, osize = 256;
 	uint8_t idata[osize];
 	uint32_t cs;
+	int ret = 0;
 
-	if(argc != 3) {
+	if (argc != 3) {
 		fprintf(stderr, "Usage: %s src dst\n", argv[0]);
-		exit(1);
+		ret = 1;
+		goto defer;;
 	}
 
-	if((src = open(argv[1], O_RDONLY)) < 0) {
+	if ((src = fopen(argv[1], "r")) == NULL) {
 		fprintf(stderr, "Could not open %s.\n", argv[1]);
-		exit(1);
+		ret = 1;
+		goto defer;;
 	}
 
-	isize = read(src, idata, osize);
-	for (int i = isize; i < osize - 4; i++)
-		idata[i] = 0;
-
-	if((dst = open(argv[2], O_CREAT | O_WRONLY, 0777)) < 0) {
+	if ((dst = fopen(argv[2], "w")) < 0) {
 		fprintf(stderr, "Could not open %s.\n", argv[2]);
-		exit(1);
+		ret = 1;
+		goto defer;;
+	}
+
+	if ((isize = fread(idata, 1, osize, src)) < 0) {
+		fprintf(stderr, "Read error.\n", argv[2]);
+		ret = 1;
+		goto defer;
 	}
+	for (int i = isize; i < osize - 4; i++)
+		idata[i] = 0;
 
 	cs = crc32(idata, osize - 4);
 	for (int i = 0; i < 4; i++)
 		idata[osize - 4 + i] = cs >> i * 8;
 
-	if ((isize = write(dst, idata, osize)) != osize) {
+	if (fwrite(idata, 1, osize, dst) != osize) {
 		fprintf(stderr, "Write error.\n");
-		exit(1);
+		ret = 1;
+		goto defer;;
 	}
 
-	while ((isize = read(src, idata, osize)) > 0)
-		write(dst, idata, isize);
+	while ((isize = fread(idata, 1, osize, src)) > 0)
+		if (fwrite(idata, 1, isize, dst) < isize) {
+			fprintf(stderr, "Write error.\n");
+			ret = 1;
+			goto defer;;
+		}
 
 	if (isize < 0) {
 		fprintf(stderr, "IO error.\n");
-		exit(1);
+		ret = 1;
+		goto defer;;
 	}
 
-	close(src);
-	close(dst);
-	return 0;
+defer:
+	if (src)
+		fclose(src);
+	if (dst)
+		fclose(dst);
+	return ret;
 }