utils-std

commit: 36538f23a98779c9abb2c807f26796be3ce67f5b
parent 21c374ab77399a99e0e8b5fe1b6f67fdb25cb180
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Thu, 28 Mar 2024 18:27:21 +0100

cmd/base64: assert(errno == 0)

Diffstat:
M
cmd/base64.c
14
++++++++++++++

1 file changed, 14 insertions(+), 0 deletions(-)
diff --git a/cmd/base64.c b/cmd/base64.c
@@ -23,16 +23,20 @@ static long wrap_nl = 76;
 static int
 xputc(int c, FILE *stream)
 {
+	assert(errno == 0);
 	if(fputc(c, stream) == EOF)
 	{
 		fprintf(stderr, "base64: Error writing: %s\n", strerror(errno));
+		errno = 0;
 		return 1;
 	}
 
+	assert(errno == 0);
 	int err = ferror(stream);
 	if(err != 0)
 	{
 		fprintf(stderr, "base64: Error writing: %s\n", strerror(err));
+		errno = 0;
 		return 1;
 	}
 
@@ -78,9 +82,11 @@ encode(FILE *fin, const char *name)
 		{
 			return 0;
 		};
+		assert(errno == 0);
 		if(ferror(fin))
 		{
 			fprintf(stderr, "base64: Error reading ‘%s’: %s\n", name, strerror(errno));
+			errno = 0;
 			return 1;
 		}
 		for(; c < 3; pad++, c++)
@@ -97,9 +103,11 @@ encode(FILE *fin, const char *name)
 			obuf[4 - pad] = '=';
 		}
 
+		assert(errno == 0);
 		if(fwrite((char *)obuf, 4, 1, stdout) != 1)
 		{
 			fprintf(stderr, "base64: Error writing: %s\n", strerror(errno));
+			errno = 0;
 			return 1;
 		}
 		c_out += 4;
@@ -112,9 +120,11 @@ encode(FILE *fin, const char *name)
 
 		if(feof(fin))
 		{
+			assert(errno == 0);
 			if(fflush(stdout))
 			{
 				fprintf(stderr, "base64: Error writing: %s\n", strerror(errno));
+				errno = 0;
 				return 1;
 			}
 			int err = ferror(stdout);
@@ -224,15 +234,19 @@ decode(FILE *fin, const char *name)
 
 	assert(c == EOF || state == 0);
 
+	assert(errno == 0);
 	if(fflush(stdout))
 	{
 		fprintf(stderr, "base64: Error writing: %s\n", strerror(errno));
+		errno = 0;
 		return 1;
 	}
+	assert(errno == 0);
 	int err = ferror(stdout);
 	if(err != 0)
 	{
 		fprintf(stderr, "base64: Error writing: %s\n", strerror(err));
+		errno = 0;
 		return 1;
 	}