shithub: regress

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strchr: add tests (thanks amavect)

--- a/libc/mkfile

+++ b/libc/mkfile

@@ -3,6 +3,7 @@

 TEST=\

 	date\

 	pow\

+	strchr\

 	zones\

 <../regress

--- /dev/null

+++ b/libc/strchr.c

@@ -1,0 +1,47 @@

+#include <u.h>

+#include <libc.h>

+void

+chars(void)

+{

+	char *z = "";

+	char *v = "foo bar ss";

+	char *e;

+

+	e = strchr(z, 0);

+	assert(e == z);

+	e = strchr(z, 'z');

+	assert(e == nil);

+	e = strchr(v, L'z');

+	assert(e == nil);

+	e = strchr(v, L'a');

+	assert(e == v+5);

+	e = strchr(v, 0);

+	assert(e == v+10);

+}

+

+void

+runes(void)

+{

+	Rune *z = L"";

+	Rune *c = L"foo βαρ ß";

+	Rune *e;

+

+	e = runestrchr(z, 0);

+	assert(e == z);

+	e = runestrchr(z, L'z');

+	assert(e == nil);

+	e = runestrchr(c, L'z');

+	assert(e == nil);

+	e = runestrchr(c, L'α');

+	assert(e == c+5);

+	e = runestrchr(c, 0);

+	assert(e == c+9);

+}

+

+void

+main(void)

+{

+	chars();

+	runes();

+	exits(nil);

+}