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/* Copyright 2013-2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define BUFSZ 50
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
int test1(void);
int skiboot_snprintf(char *buf, size_t bufsz, size_t l, const char* format, ...);
static void test_printf_0u(int n)
{
char *buf, *buf2;
int blen;
unsigned int i;
for(i=1; i<10; i++)
{
blen = i+1;
if (n<0)
blen++;
buf = (char*)malloc(blen);
buf2 = (char*)malloc(blen);
skiboot_snprintf(buf, blen, blen, "%08u", n);
snprintf(buf2, blen, "%08u", n);
n = n * 10;
assert(0 == strncmp(buf, buf2, blen));
free(buf);
free(buf2);
}
}
static void test_printf_u(int n)
{
char *buf, *buf2;
int blen;
unsigned int r;
unsigned int i;
for(i=1; i<10; i++)
{
blen = i+1;
if (n<0)
blen++;
buf = (char*)malloc(blen);
buf2 = (char*)malloc(blen);
r = skiboot_snprintf(buf, blen, blen, "%u", n);
snprintf(buf2, blen, "%u", n);
n = n * 10;
if (n<0)
assert(i+1 == r);
else
assert(i == r);
assert(0 == strncmp(buf, buf2, blen));
free(buf);
free(buf2);
}
}
static void test_printf_d(int n)
{
char *buf, *buf2;
int blen;
int r;
int i;
for(i=1; i<10; i++)
{
blen = i+1;
if (n<0)
blen++;
buf = (char*)malloc(blen);
buf2 = (char*)malloc(blen);
r = skiboot_snprintf(buf, blen, blen, "%d", n);
snprintf(buf2, blen, "%d", n);
n = n * 10;
if (n<0)
assert(i+1 == r);
else
assert(i == r);
assert(0 == strncmp(buf, buf2, blen));
free(buf);
free(buf2);
}
}
static void test_printf_x(const char* f)
{
char *buf, *buf2;
int blen;
int i, r;
unsigned int n=0x1;
for (i=0; i<8; i++)
{
blen = i+2;
buf = (char*)malloc(blen);
buf2 = (char*)malloc(blen);
r = skiboot_snprintf(buf, blen, blen, f, n);
snprintf(buf2, blen, f, n);
assert(i+1 == r);
assert(0 == strncmp(buf, buf2, blen));
free(buf);
free(buf2);
n = n << 4;
}
}
static void test_printf_c(void)
{
char *buf= (char*)malloc(2);
char buf2[2];
unsigned char i= 0xff;
int r;
while(i)
{
r = skiboot_snprintf(buf, 2, 2, "%c", i);
snprintf(buf2, 2, "%c", i);
assert(r==1);
assert(0 == strncmp(buf, buf2, 2));
i--;
}
free(buf);
}
static void test_printf_p(void)
{
char *buf= (char*)malloc(32);
char buf2[32];
skiboot_snprintf(buf, 32, 32, "%p", buf);
snprintf(buf2, 32, "%p", buf);
assert(0 == strncmp(buf, buf2, 32));
free(buf);
}
static void test_printf_o(void)
{
char *buf= (char*)malloc(32);
char buf2[32];
skiboot_snprintf(buf, 32, 32, "%o", 0x12345678);
snprintf(buf2, 32, "%o", 0x12345678);
assert(0 == strncmp(buf, buf2, 32));
free(buf);
}
static void test_printf_h(short i)
{
char *buf= (char*)malloc(32);
char buf2[32];
skiboot_snprintf(buf, 32, 32, "%hd", i);
snprintf(buf2, 32, "%hd", i);
assert(0 == strncmp(buf, buf2, 32));
free(buf);
}
static void test_printf_z(size_t i)
{
char *buf= (char*)malloc(32);
char buf2[32];
skiboot_snprintf(buf, 32, 32, "%zu", i);
snprintf(buf2, 32, "%zu", i);
assert(0 == strncmp(buf, buf2, 32));
free(buf);
}
int main(void)
{
char *buf;
int r;
buf = (char*)malloc(BUFSZ);
memset(buf, 0, BUFSZ);
assert(-1 == test1());
r = skiboot_snprintf(buf, BUFSZ, 2, "%%");
assert(r==1);
assert(buf[0] == '%' && buf[1] == 0);
r = skiboot_snprintf(buf, BUFSZ, 2, "%d", 137);
/* BUG/FIXME:
* skiboot libc does NOT return the length of the buffer you'd need
* Instead, it'll return something random, possibly zero (as here)
* but as you'll see in test_in_buf_len2, sometimes not.
*
* Basically, we're not POSIX printf and this is some day going to
* cause things to be awful.
*/
assert(0 == r); // BUG, should be 3
assert(0 == strncmp(buf, "", 3));
r = skiboot_snprintf(buf, BUFSZ, 4, "%d", 137);
assert(3 == r);
assert(0 == strncmp(buf, "137", 3));
assert(buf[3] == 0);
/* Now we test the strange behaviour of our printf.
* For strings, we get partial prints going, but if we whack an
* integer on the end, we may or may not get that integer, depending
* on if we have enough size. We should test that though */
r = skiboot_snprintf(buf, BUFSZ, 4, "Hello %d", 137);
assert(3 == r);
assert(0 == strncmp(buf, "Hel", 3));
assert(buf[3] == 0);
r = skiboot_snprintf(buf, BUFSZ, 7, "Hello %d", 137);
assert(6 == r);
assert(0 == strncmp(buf, "Hello ", 6));
assert(buf[6] == 0);
r = skiboot_snprintf(buf, BUFSZ, 10, "Hello %d", 137);
assert(9 == r);
assert(0 == strncmp(buf, "Hello 137", 10));
assert(buf[9] == 0);
free(buf);
test_printf_u(1);
test_printf_0u(1);
test_printf_d(1);
test_printf_d(-1);
test_printf_x("%x");
test_printf_x("%X");
test_printf_c();
test_printf_p();
test_printf_o();
test_printf_h(0);
test_printf_h(128);
test_printf_h(256);
test_printf_h(-1);
test_printf_h(32767);
test_printf_h(32768);
test_printf_h(65535);
test_printf_z(0);
test_printf_z(-1);
test_printf_z(12345);
test_printf_z(128000000);
return 0;
}
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