1 /*
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "webrtc/base/checks.h"
12 #include "webrtc/base/stringutils.h"
13
14 namespace rtc {
15
memory_check(const void * memory,int c,size_t count)16 bool memory_check(const void* memory, int c, size_t count) {
17 const char* char_memory = static_cast<const char*>(memory);
18 char char_c = static_cast<char>(c);
19 for (size_t i = 0; i < count; ++i) {
20 if (char_memory[i] != char_c) {
21 return false;
22 }
23 }
24 return true;
25 }
26
string_match(const char * target,const char * pattern)27 bool string_match(const char* target, const char* pattern) {
28 while (*pattern) {
29 if (*pattern == '*') {
30 if (!*++pattern) {
31 return true;
32 }
33 while (*target) {
34 if ((toupper(*pattern) == toupper(*target))
35 && string_match(target + 1, pattern + 1)) {
36 return true;
37 }
38 ++target;
39 }
40 return false;
41 } else {
42 if (toupper(*pattern) != toupper(*target)) {
43 return false;
44 }
45 ++target;
46 ++pattern;
47 }
48 }
49 return !*target;
50 }
51
52 #if defined(WEBRTC_WIN)
ascii_string_compare(const wchar_t * s1,const char * s2,size_t n,CharacterTransformation transformation)53 int ascii_string_compare(const wchar_t* s1, const char* s2, size_t n,
54 CharacterTransformation transformation) {
55 wchar_t c1, c2;
56 while (true) {
57 if (n-- == 0) return 0;
58 c1 = transformation(*s1);
59 // Double check that characters are not UTF-8
60 RTC_DCHECK_LT(static_cast<unsigned char>(*s2), 128);
61 // Note: *s2 gets implicitly promoted to wchar_t
62 c2 = transformation(*s2);
63 if (c1 != c2) return (c1 < c2) ? -1 : 1;
64 if (!c1) return 0;
65 ++s1;
66 ++s2;
67 }
68 }
69
asccpyn(wchar_t * buffer,size_t buflen,const char * source,size_t srclen)70 size_t asccpyn(wchar_t* buffer, size_t buflen,
71 const char* source, size_t srclen) {
72 if (buflen <= 0)
73 return 0;
74
75 if (srclen == SIZE_UNKNOWN) {
76 srclen = strlenn(source, buflen - 1);
77 } else if (srclen >= buflen) {
78 srclen = buflen - 1;
79 }
80 #if !defined(NDEBUG)
81 // Double check that characters are not UTF-8
82 for (size_t pos = 0; pos < srclen; ++pos)
83 RTC_DCHECK_LT(static_cast<unsigned char>(source[pos]), 128);
84 #endif
85 std::copy(source, source + srclen, buffer);
86 buffer[srclen] = 0;
87 return srclen;
88 }
89
90 #endif // WEBRTC_WIN
91
replace_substrs(const char * search,size_t search_len,const char * replace,size_t replace_len,std::string * s)92 void replace_substrs(const char *search,
93 size_t search_len,
94 const char *replace,
95 size_t replace_len,
96 std::string *s) {
97 size_t pos = 0;
98 while ((pos = s->find(search, pos, search_len)) != std::string::npos) {
99 s->replace(pos, search_len, replace, replace_len);
100 pos += replace_len;
101 }
102 }
103
starts_with(const char * s1,const char * s2)104 bool starts_with(const char *s1, const char *s2) {
105 return strncmp(s1, s2, strlen(s2)) == 0;
106 }
107
ends_with(const char * s1,const char * s2)108 bool ends_with(const char *s1, const char *s2) {
109 size_t s1_length = strlen(s1);
110 size_t s2_length = strlen(s2);
111
112 if (s2_length > s1_length) {
113 return false;
114 }
115
116 const char* start = s1 + (s1_length - s2_length);
117 return strncmp(start, s2, s2_length) == 0;
118 }
119
120 static const char kWhitespace[] = " \n\r\t";
121
string_trim(const std::string & s)122 std::string string_trim(const std::string& s) {
123 std::string::size_type first = s.find_first_not_of(kWhitespace);
124 std::string::size_type last = s.find_last_not_of(kWhitespace);
125
126 if (first == std::string::npos || last == std::string::npos) {
127 return std::string("");
128 }
129
130 return s.substr(first, last - first + 1);
131 }
132
133 } // namespace rtc
134