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
|
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/fx_extension.h"
#include <algorithm>
#include <cwctype>
#include <limits>
#include "third_party/base/compiler_specific.h"
time_t (*time_func)() = []() -> time_t { return time(nullptr); };
float FXSYS_wcstof(const wchar_t* pwsStr, int32_t iLength, int32_t* pUsedLen) {
ASSERT(pwsStr);
if (iLength < 0)
iLength = static_cast<int32_t>(wcslen(pwsStr));
if (iLength == 0)
return 0.0f;
int32_t iUsedLen = 0;
bool bNegtive = false;
switch (pwsStr[iUsedLen]) {
case '-':
bNegtive = true;
FALLTHROUGH;
case '+':
iUsedLen++;
break;
}
float fValue = 0.0f;
while (iUsedLen < iLength) {
wchar_t wch = pwsStr[iUsedLen];
if (!std::iswdigit(wch))
break;
fValue = fValue * 10.0f + (wch - L'0');
iUsedLen++;
}
if (iUsedLen < iLength && pwsStr[iUsedLen] == L'.') {
float fPrecise = 0.1f;
while (++iUsedLen < iLength) {
wchar_t wch = pwsStr[iUsedLen];
if (!std::iswdigit(wch))
break;
fValue += (wch - L'0') * fPrecise;
fPrecise *= 0.1f;
}
}
if (iUsedLen < iLength &&
(pwsStr[iUsedLen] == 'e' || pwsStr[iUsedLen] == 'E')) {
++iUsedLen;
bool negative_exponent = false;
if (iUsedLen < iLength &&
(pwsStr[iUsedLen] == '-' || pwsStr[iUsedLen] == '+')) {
negative_exponent = pwsStr[iUsedLen] == '-';
++iUsedLen;
}
int32_t exp_value = 0;
while (iUsedLen < iLength) {
wchar_t wch = pwsStr[iUsedLen];
if (!std::iswdigit(wch))
break;
exp_value = exp_value * 10.0f + (wch - L'0');
// Exponent is outside the valid range, fail.
if ((negative_exponent &&
-exp_value < std::numeric_limits<float>::min_exponent10) ||
(!negative_exponent &&
exp_value > std::numeric_limits<float>::max_exponent10)) {
*pUsedLen = 0;
return 0.0f;
}
++iUsedLen;
}
for (size_t i = exp_value; i > 0; --i) {
if (exp_value > 0) {
if (negative_exponent)
fValue /= 10;
else
fValue *= 10;
}
}
}
if (pUsedLen)
*pUsedLen = iUsedLen;
return bNegtive ? -fValue : fValue;
}
wchar_t* FXSYS_wcsncpy(wchar_t* dstStr, const wchar_t* srcStr, size_t count) {
ASSERT(dstStr && srcStr && count > 0);
for (size_t i = 0; i < count; ++i)
if ((dstStr[i] = srcStr[i]) == L'\0')
break;
return dstStr;
}
int32_t FXSYS_wcsnicmp(const wchar_t* s1, const wchar_t* s2, size_t count) {
ASSERT(s1 && s2 && count > 0);
wchar_t wch1 = 0, wch2 = 0;
while (count-- > 0) {
wch1 = static_cast<wchar_t>(FXSYS_towlower(*s1++));
wch2 = static_cast<wchar_t>(FXSYS_towlower(*s2++));
if (wch1 != wch2)
break;
}
return wch1 - wch2;
}
uint32_t FX_HashCode_GetA(const ByteStringView& str, bool bIgnoreCase) {
uint32_t dwHashCode = 0;
if (bIgnoreCase) {
for (const auto& c : str)
dwHashCode = 31 * dwHashCode + tolower(c);
} else {
for (const auto& c : str)
dwHashCode = 31 * dwHashCode + c;
}
return dwHashCode;
}
uint32_t FX_HashCode_GetW(const WideStringView& str, bool bIgnoreCase) {
uint32_t dwHashCode = 0;
if (bIgnoreCase) {
for (const auto& c : str)
dwHashCode = 1313 * dwHashCode + FXSYS_towlower(c);
} else {
for (const auto& c : str)
dwHashCode = 1313 * dwHashCode + c;
}
return dwHashCode;
}
void FXSYS_IntToTwoHexChars(uint8_t n, char* buf) {
static const char kHex[] = "0123456789ABCDEF";
buf[0] = kHex[n / 16];
buf[1] = kHex[n % 16];
}
void FXSYS_IntToFourHexChars(uint16_t n, char* buf) {
FXSYS_IntToTwoHexChars(n / 256, buf);
FXSYS_IntToTwoHexChars(n % 256, buf + 2);
}
size_t FXSYS_ToUTF16BE(uint32_t unicode, char* buf) {
ASSERT(unicode <= 0xD7FF || (unicode > 0xDFFF && unicode <= 0x10FFFF));
if (unicode <= 0xFFFF) {
FXSYS_IntToFourHexChars(unicode, buf);
return 4;
}
unicode -= 0x010000;
// High ten bits plus 0xD800
FXSYS_IntToFourHexChars(0xD800 + unicode / 0x400, buf);
// Low ten bits plus 0xDC00
FXSYS_IntToFourHexChars(0xDC00 + unicode % 0x400, buf + 4);
return 8;
}
void FXSYS_SetTimeFunction(time_t (*func)()) {
time_func = func ? func : []() -> time_t { return time(nullptr); };
}
time_t FXSYS_time(time_t* tloc) {
time_t ret_val = time_func();
if (tloc)
*tloc = ret_val;
return ret_val;
}
|
