libc : Changes variable data type where return value of strlen() stored from int to size_t

Reason of the change as integer value may overflow, and it can give negative
value for the length.

This patch also changes the data type of variable which is compared with
strlen() as the comparison also has to be done on the same level.

Signed-off-by: Mukesh Ojha <mukesh02@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

3 files changed, 4 insertions, 4 deletions

diff --git a/libc/stdio/vsnprintf.c b/libc/stdio/vsnprintf.c
index fbb84a0b..38d52818 100644
--- a/libc/stdio/vsnprintf.c
+++ b/libc/stdio/vsnprintf.c
@@ -26,7 +26,7 @@ static int
 print_str_fill(char **buffer, size_t bufsize, char *sizec,
 					const char *str, char c)
 {
-	int i, sizei, len;
+	size_t i, sizei, len;
 	char *bstart = *buffer;
 
 	sizei = strtoul(sizec, NULL, 10);
@@ -46,7 +46,7 @@ static int
 print_str(char **buffer, size_t bufsize, const char *str)
 {
 	char *bstart = *buffer;
-	int i;
+	size_t i;
 
 	for (i = 0; (i < strlen(str)) && ((*buffer - bstart) < bufsize); i++) {
 		**buffer = str[i];
diff --git a/libc/string/strcat.c b/libc/string/strcat.c
index eb597a02..936e5b10 100644
--- a/libc/string/strcat.c
+++ b/libc/string/strcat.c
@@ -15,7 +15,7 @@
 char *
 strcat(char *dst, const char *src)
 {
-	int p;
+	size_t p;
 
 	p = strlen(dst);
 	strcpy(&dst[p], src);
diff --git a/libc/string/strstr.c b/libc/string/strstr.c
index 3e090d2c..a6e96187 100644
--- a/libc/string/strstr.c
+++ b/libc/string/strstr.c
@@ -16,7 +16,7 @@ char *
 strstr(const char *hay, const char *needle)
 {
 	char *pos;
-	int hlen, nlen;
+	size_t hlen, nlen;
 
 	if (hay == NULL || needle == NULL)
 		return NULL;