str: add STR_MAX_CHARS().

[ccan] / ccan / str / test / run-STR_MAX_CHARS.c

diff --git a/ccan/str/test/run-STR_MAX_CHARS.c b/ccan/str/test/run-STR_MAX_CHARS.c
new file mode 100644 (file)
index 0000000..ae6969c
--- /dev/null
+++ b/ccan/str/test/run-STR_MAX_CHARS.c
@@ -0,0 +1,59 @@
+#include <ccan/str/str.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ccan/tap/tap.h>
+#include <stdint.h>
+
+int main(int argc, char *argv[])
+{
+       char str[1000];
+       struct {
+               uint8_t u1byte;
+               int8_t s1byte;
+               uint16_t u2byte;
+               int16_t s2byte;
+               uint32_t u4byte;
+               int32_t s4byte;
+               uint64_t u8byte;
+               int64_t s8byte;
+               void *ptr;
+       } types;
+
+       plan_tests(13);
+
+       memset(&types, 0xFF, sizeof(types));
+
+       /* Hex versions */
+       sprintf(str, "0x%llx", (unsigned long long)types.u1byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u1byte));
+       sprintf(str, "0x%llx", (unsigned long long)types.u2byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u2byte));
+       sprintf(str, "0x%llx", (unsigned long long)types.u4byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u4byte));
+       sprintf(str, "0x%llx", (unsigned long long)types.u8byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u8byte));
+
+       /* Decimal versions */
+       sprintf(str, "%u", types.u1byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u1byte));
+       sprintf(str, "%d", types.s1byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.s1byte));
+       sprintf(str, "%u", types.u2byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u2byte));
+       sprintf(str, "%d", types.s2byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.s2byte));
+       sprintf(str, "%u", types.u4byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u4byte));
+       sprintf(str, "%d", types.s4byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.s4byte));
+       sprintf(str, "%llu", (unsigned long long)types.u8byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.u8byte));
+       sprintf(str, "%lld", (long long)types.s8byte);
+       ok1(strlen(str) < STR_MAX_CHARS(types.s8byte));
+
+       /* Pointer version. */
+       sprintf(str, "%p", types.ptr);
+       ok1(strlen(str) < STR_MAX_CHARS(types.ptr));
+
+       return exit_status();
+}