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-rw-r--r--strtoupper.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/strtoupper.c b/strtoupper.c
index ce7c147..d22da79 100644
--- a/strtoupper.c
+++ b/strtoupper.c
@@ -12,6 +12,18 @@ extern inline char *libsimple_strtoupper(char *, const char *);
int
main(void)
{
+ char buf[100];
+
+ stpcpy(buf, "abcdeABCDE12345");
+ assert(!strcmpnul(libsimple_strtoupper(&buf[3], &buf[0]), "ABCDEABCDE12345"));
+ assert(!strcmp(buf, "abcABCDEABCDE12345"));
+ stpcpy(buf, "abcdeABCDE12345");
+ assert(!strcmpnul(libsimple_strtoupper(&buf[0], &buf[3]), "DEABCDE12345"));
+ assert(!strcmp(buf, "DEABCDE12345"));
+ stpcpy(buf, "abcdeABCDE12345");
+ assert(!strcmpnul(libsimple_strtoupper(&buf[0], &buf[0]), "ABCDEABCDE12345"));
+ assert(!strcmp(buf, "ABCDEABCDE12345"));
+
return 0;
}