1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
#include "stdafx.h"
#include "StringUtils.h"
#include <cctype>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
namespace ServerRuntime
{
namespace StringUtils
{
std::string WideToUtf8(const std::wstring &value)
{
if (value.empty())
{
return std::string();
}
int charCount = WideCharToMultiByte(CP_UTF8, 0, value.c_str(), (int)value.length(), NULL, 0, NULL, NULL);
if (charCount <= 0)
{
return std::string();
}
std::string utf8;
utf8.resize(charCount);
WideCharToMultiByte(CP_UTF8, 0, value.c_str(), (int)value.length(), &utf8[0], charCount, NULL, NULL);
return utf8;
}
std::wstring Utf8ToWide(const char *value)
{
if (value == NULL || value[0] == 0)
{
return std::wstring();
}
int wideCount = MultiByteToWideChar(CP_UTF8, 0, value, -1, NULL, 0);
if (wideCount <= 0)
{
// Fall back to the current ANSI code page so legacy non-UTF-8 inputs remain readable.
wideCount = MultiByteToWideChar(CP_ACP, 0, value, -1, NULL, 0);
if (wideCount <= 0)
{
return std::wstring();
}
std::wstring wide;
wide.resize(wideCount - 1);
MultiByteToWideChar(CP_ACP, 0, value, -1, &wide[0], wideCount);
return wide;
}
std::wstring wide;
wide.resize(wideCount - 1);
MultiByteToWideChar(CP_UTF8, 0, value, -1, &wide[0], wideCount);
return wide;
}
std::wstring Utf8ToWide(const std::string &value)
{
return Utf8ToWide(value.c_str());
}
std::string StripUtf8Bom(const std::string &value)
{
if (value.size() >= 3 &&
(unsigned char)value[0] == 0xEF &&
(unsigned char)value[1] == 0xBB &&
(unsigned char)value[2] == 0xBF)
{
return value.substr(3);
}
return value;
}
std::string TrimAscii(const std::string &value)
{
size_t start = 0;
while (start < value.length() && std::isspace((unsigned char)value[start]))
{
++start;
}
size_t end = value.length();
while (end > start && std::isspace((unsigned char)value[end - 1]))
{
--end;
}
return value.substr(start, end - start);
}
std::string ToLowerAscii(const std::string &value)
{
std::string lowered = value;
for (size_t i = 0; i < lowered.length(); ++i)
{
lowered[i] = (char)std::tolower((unsigned char)lowered[i]);
}
return lowered;
}
std::string JoinTokens(const std::vector<std::string> &tokens, size_t startIndex, const char *separator)
{
if (startIndex >= tokens.size())
{
return std::string();
}
const auto joinSeparator = std::string((separator != nullptr) ? separator : " ");
size_t totalLength = 0;
for (size_t i = startIndex; i < tokens.size(); ++i)
{
totalLength += tokens[i].size();
}
totalLength += (tokens.size() - startIndex - 1) * joinSeparator.size();
std::string joined;
joined.reserve(totalLength);
for (size_t i = startIndex; i < tokens.size(); ++i)
{
if (!joined.empty())
{
joined += joinSeparator;
}
joined += tokens[i];
}
return joined;
}
bool StartsWithIgnoreCase(const std::string &value, const std::string &prefix)
{
if (prefix.size() > value.size())
{
return false;
}
for (size_t i = 0; i < prefix.size(); ++i)
{
unsigned char a = (unsigned char)value[i];
unsigned char b = (unsigned char)prefix[i];
if (std::tolower(a) != std::tolower(b))
{
return false;
}
}
return true;
}
bool TryParseUnsignedLongLong(const std::string &value, unsigned long long *outValue)
{
if (outValue == nullptr)
{
return false;
}
const std::string trimmed = TrimAscii(value);
if (trimmed.empty())
{
return false;
}
errno = 0;
char *end = nullptr;
const unsigned long long parsed = _strtoui64(trimmed.c_str(), &end, 0);
if (end == trimmed.c_str() || errno != 0)
{
return false;
}
while (*end == ' ' || *end == '\t' || *end == '\r' || *end == '\n')
{
++end;
}
if (*end != 0)
{
return false;
}
*outValue = parsed;
return true;
}
std::string GetCurrentUtcTimestampIso8601()
{
SYSTEMTIME utc = {};
GetSystemTime(&utc);
char created[64] = {};
sprintf_s(
created,
sizeof(created),
"%04u-%02u-%02uT%02u:%02u:%02uZ",
(unsigned)utc.wYear,
(unsigned)utc.wMonth,
(unsigned)utc.wDay,
(unsigned)utc.wHour,
(unsigned)utc.wMinute,
(unsigned)utc.wSecond);
return created;
}
}
}
|
