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-rw-r--r--strnreplace.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/strnreplace.c b/strnreplace.c
index f8a2036..eb26ec9 100644
--- a/strnreplace.c
+++ b/strnreplace.c
@@ -12,6 +12,32 @@ extern inline char *libsimple_strnreplace(char *, int, int, size_t);
int
main(void)
{
+ char buf[100];
+
+ stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+ assert(libsimple_strnreplace(buf, 'o', 'x', SIZE_MAX) == &buf[11]);
+ assert(!memcmp(buf, "hellx wxrld\0goodbye world", 26));
+
+ stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+ assert(libsimple_strnreplace(buf, 'o', 'x', 12) == &buf[11]);
+ assert(!memcmp(buf, "hellx wxrld\0goodbye world", 26));
+
+ stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+ assert(libsimple_strnreplace(buf, 'o', 'x', 11) == &buf[11]);
+ assert(!memcmp(buf, "hellx wxrld\0goodbye world", 26));
+
+ stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+ assert(libsimple_strnreplace(buf, 'o', 'x', 6) == &buf[6]);
+ assert(!memcmp(buf, "hellx world\0goodbye world", 26));
+
+ stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+ assert(libsimple_strnreplace(buf, 'o', 'x', 5) == &buf[5]);
+ assert(!memcmp(buf, "hellx world\0goodbye world", 26));
+
+ stpcpy(mempcpy(buf, "hello world", 12), "goodbye world");
+ assert(libsimple_strnreplace(buf, 'o', 'x', 4) == &buf[4]);
+ assert(!memcmp(buf, "hello world\0goodbye world", 26));
+
return 0;
}