1 files changed, 54 insertions, 0 deletions
diff --git a/strtoi64.c b/strtoi64.c
new file mode 100644
index 0000000..a4c87bc
--- /dev/null
+++ b/strtoi64.c
@@ -0,0 +1,54 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+#define RET_MAX 9223372036854775807LL
+#define RET_MIN (-RET_MAX - 1LL)
+
+
+int_least64_t
+libsimple_strtoi64(const char *restrict nptr, char **restrict end, int base)
+{
+	intmax_t r = strtoimax(nptr, end, base);
+	if (r < RET_MIN) {
+		r = RET_MIN;
+		errno = ERANGE;
+	} else if (r > RET_MAX) {
+		r = RET_MAX;
+		errno = ERANGE;
+	}
+	return (int_least64_t)r;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	char *e;
+	errno = 0;
+	assert(strtoi64("0x7FFFFFFFFFFFFFFF", NULL, 0) == INT64_C(0x7FFFFFFFFFFFFFFF) && !errno);
+	assert(strtoi64("0x7FFFFFFFFFFFFFFF", NULL, 16) == INT64_C(0x7FFFFFFFFFFFFFFF) && !errno);
+	assert(strtoi64("7FFFFFFFFFFFFFFF", NULL, 16) == INT64_C(0x7FFFFFFFFFFFFFFF) && !errno);
+	assert(strtoi64("0x7FFFFFFFFFFFFFFF", NULL, 10) == 0 && !errno);
+	assert(strtoi64("0x7FFFFFFFFFFFFFFF", &e, 0) == INT64_C(0x7FFFFFFFFFFFFFFF) && !*e && !errno);
+	assert(strtoi64("0x7FFFFFFFFFFFFFFF ", &e, 16) == INT64_C(0x7FFFFFFFFFFFFFFF) && *e == ' ' && !errno);
+	assert(strtoi64("0x7FFFFFFFFFFFFFFF", &e, 10) == 0 && *e == 'x' && !errno);
+	assert(strtoi64("9223372036854775807", &e, 10) == INT64_C(0x7FFFFFFFFFFFFFFF) && !*e && !errno);
+	assert(strtoi64("-9223372036854775807", &e, 10) == INT64_C(-9223372036854775807) && !*e && !errno);
+	assert(strtoi64("-9223372036854775808", &e, 10) == INT64_C(-9223372036854775808) && !*e && !errno);
+	assert(strtoi64("1234", &e, 10) == 1234 && !*e && !errno);
+	assert(strtoi64("1234", &e, 8) == 01234 && !*e && !errno);
+	assert(strtoi64("01234", &e, 0) == 01234 && !*e && !errno);
+	assert(strtoi64("9223372036854775808", &e, 10) == INT64_C(9223372036854775807) && !*e && errno == ERANGE);
+	errno = 0;
+	assert(strtoi64("-9223372036854775809", &e, 10) == INT64_C(-9223372036854775808) && !*e && errno == ERANGE);
+	errno = 0;
+	assert(!strtoi64("1", &e, -10000) && errno == EINVAL);
+	errno = 0;
+	return 0;
+}
+
+#endif