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Add strndup

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char* __fastcall__ strndup (const char* S, size_t maxlen);
This commit is contained in:
Colin Leroy-Mira
2025-07-03 23:43:23 +02:00
parent fcbc253bf9
commit 90e1ac374b
4 changed files with 148 additions and 0 deletions
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60
test/val/lib_common_strndup.c Normal file
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#include <string.h>
#include "unittest.h"
#define SHORT_STR "abcdefghijklmnopqrstuvwxyz"
#define MID_STR_LEN 700 /* Two pages and something */
#define LONG_STR_LEN 40000UL /* Two long to duplicate */
TEST
{
char *dst;
char *src;
int i;
dst = strndup("", 0);
ASSERT_IsTrue(dst != NULL, "strndup returned NULL")
ASSERT_IsTrue(!strcmp(dst, ""), "strings differ");
free(dst);
for (i = 0; i < 30; i+=10) {
dst = strndup(SHORT_STR, i);
ASSERT_IsTrue(dst != NULL, "strndup returned NULL");
printf("strlen %s = %d (%d expected)\n", dst, strlen(dst), i);
ASSERT_IsTrue(strlen(dst) == i, "string lengths differ");
ASSERT_IsTrue(!strncmp(dst, SHORT_STR, i), "strings differ");
free(dst);
}
dst = strndup(SHORT_STR, 50);
ASSERT_IsTrue(dst != NULL, "strndup returned NULL");
printf("strlen %s = %d (%d expected)\n", dst, strlen(dst), i);
ASSERT_IsTrue(strlen(dst) == 26, "string lengths differ");
ASSERT_IsTrue(!strcmp(dst, SHORT_STR), "strings differ");
free(dst);
src = malloc(MID_STR_LEN+1);
ASSERT_IsTrue(src != NULL, "Could not allocate source string");
memset(src, 'a', MID_STR_LEN);
src[MID_STR_LEN] = '\0';
for (i = 0; i < MID_STR_LEN -1; i+=10) {
dst = strndup(src, i);
ASSERT_IsTrue(dst != NULL, "strndup returned NULL");
printf("strlen %s = %d (%d expected)\n", dst, strlen(dst), i);
ASSERT_IsTrue(strlen(dst) == i, "string lengths differ");
ASSERT_IsTrue(!strncmp(dst, src, i), "strings differ");
free(dst);
}
for (i = MID_STR_LEN; i < MID_STR_LEN * 2; i+=10) {
dst = strndup(src, i);
ASSERT_IsTrue(dst != NULL, "strndup returned NULL");
printf("%d, strlen %s = %d (%d expected)\n", i, dst, strlen(dst), strlen(src));
ASSERT_IsTrue(strlen(dst) == strlen(src), "string lengths differ");
ASSERT_IsTrue(!strcmp(dst, src), "strings differ");
free(dst);
}
}
ENDTEST