1//===-- Unittests for asprintf--------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/stdio/asprintf.h"
10#include "src/stdio/sprintf.h"
11#include "src/string/memset.h"
12#include "test/UnitTest/Test.h"
13
14TEST(LlvmLibcASPrintfTest, SimpleNoConv) {
15 char *buff = nullptr;
16 int written;
17 written =
18 LIBC_NAMESPACE::asprintf(&buff, "A simple string with no conversions.");
19 EXPECT_EQ(written, 36);
20 ASSERT_STREQ(buff, "A simple string with no conversions.");
21 free(buff);
22}
23
24TEST(LlvmLibcASPrintfTest, PercentConv) {
25 char *buff = nullptr;
26 int written;
27
28 written = LIBC_NAMESPACE::asprintf(&buff, "%%");
29 EXPECT_EQ(written, 1);
30 ASSERT_STREQ(buff, "%");
31 free(buff);
32
33 written = LIBC_NAMESPACE::asprintf(&buff, "abc %% def");
34 EXPECT_EQ(written, 9);
35 ASSERT_STREQ(buff, "abc % def");
36 free(buff);
37
38 written = LIBC_NAMESPACE::asprintf(&buff, "%%%%%%");
39 EXPECT_EQ(written, 3);
40 ASSERT_STREQ(buff, "%%%");
41 free(buff);
42}
43
44TEST(LlvmLibcASPrintfTest, CharConv) {
45 char *buff = nullptr;
46 int written;
47
48 written = LIBC_NAMESPACE::asprintf(&buff, "%c", 'a');
49 EXPECT_EQ(written, 1);
50 ASSERT_STREQ(buff, "a");
51 free(buff);
52
53 written = LIBC_NAMESPACE::asprintf(&buff, "%3c %-3c", '1', '2');
54 EXPECT_EQ(written, 7);
55 ASSERT_STREQ(buff, " 1 2 ");
56 free(buff);
57
58 written = LIBC_NAMESPACE::asprintf(&buff, "%*c", 2, '3');
59 EXPECT_EQ(written, 2);
60 ASSERT_STREQ(buff, " 3");
61 free(buff);
62}
63
64TEST(LlvmLibcASPrintfTest, LargeStringNoConv) {
65 char *buff = nullptr;
66 char long_str[1001];
67 LIBC_NAMESPACE::memset(long_str, 'a', 1000);
68 long_str[1000] = '\0';
69 int written;
70 written = LIBC_NAMESPACE::asprintf(&buff, long_str);
71 EXPECT_EQ(written, 1000);
72 ASSERT_STREQ(buff, long_str);
73 free(buff);
74}
75
76TEST(LlvmLibcASPrintfTest, ManyReAlloc) {
77 char *buff = nullptr;
78 char long_str[1001];
79 auto expected_num_chars =
80 LIBC_NAMESPACE::sprintf(long_str, "%200s%200s%200s", "a", "b", "c");
81 long_str[expected_num_chars] = '\0';
82 int written;
83 written = LIBC_NAMESPACE::asprintf(&buff, long_str);
84 EXPECT_EQ(written, expected_num_chars);
85 ASSERT_STREQ(buff, long_str);
86 free(buff);
87}
88

source code of libc/test/src/stdio/asprintf_test.cpp