1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #ifndef CORE_FXCRT_FX_EXTENSION_H_
8 #define CORE_FXCRT_FX_EXTENSION_H_
9
10 #include <cctype>
11 #include <cwctype>
12 #include <memory>
13
14 #include "core/fxcrt/fx_string.h"
15
16 #define FX_INVALID_OFFSET static_cast<uint32_t>(-1)
17
18 #ifdef PDF_ENABLE_XFA
19 #define FX_IsOdd(a) ((a)&1)
20 #endif // PDF_ENABLE_XFA
21
22 float FXSYS_wcstof(const wchar_t* pwsStr,
23 int32_t iLength = -1,
24 int32_t* pUsedLen = nullptr);
25 wchar_t* FXSYS_wcsncpy(wchar_t* dstStr, const wchar_t* srcStr, size_t count);
26 int32_t FXSYS_wcsnicmp(const wchar_t* s1, const wchar_t* s2, size_t count);
27
FXSYS_islower(int32_t ch)28 inline bool FXSYS_islower(int32_t ch) {
29 return ch >= 'a' && ch <= 'z';
30 }
31
FXSYS_isupper(int32_t ch)32 inline bool FXSYS_isupper(int32_t ch) {
33 return ch >= 'A' && ch <= 'Z';
34 }
35
FXSYS_tolower(int32_t ch)36 inline int32_t FXSYS_tolower(int32_t ch) {
37 return ch < 'A' || ch > 'Z' ? ch : (ch + 0x20);
38 }
39
FXSYS_toupper(int32_t ch)40 inline int32_t FXSYS_toupper(int32_t ch) {
41 return ch < 'a' || ch > 'z' ? ch : (ch - 0x20);
42 }
43
FXSYS_iswalpha(wchar_t wch)44 inline bool FXSYS_iswalpha(wchar_t wch) {
45 return FXSYS_isupper(wch) || FXSYS_islower(wch);
46 }
47
FXSYS_iswalnum(wchar_t wch)48 inline bool FXSYS_iswalnum(wchar_t wch) {
49 return FXSYS_iswalpha(wch) || std::iswdigit(wch);
50 }
51
FXSYS_iswspace(wchar_t c)52 inline bool FXSYS_iswspace(wchar_t c) {
53 return (c == 0x20) || (c == 0x0d) || (c == 0x0a) || (c == 0x09);
54 }
55
FXSYS_isHexDigit(const char c)56 inline bool FXSYS_isHexDigit(const char c) {
57 return !((c & 0x80) || !std::isxdigit(c));
58 }
59
FXSYS_HexCharToInt(const char c)60 inline int FXSYS_HexCharToInt(const char c) {
61 if (!FXSYS_isHexDigit(c))
62 return 0;
63 char upchar = std::toupper(c);
64 return upchar > '9' ? upchar - 'A' + 10 : upchar - '0';
65 }
66
FXSYS_isDecimalDigit(const char c)67 inline bool FXSYS_isDecimalDigit(const char c) {
68 return !((c & 0x80) || !std::isdigit(c));
69 }
70
FXSYS_isDecimalDigit(const wchar_t c)71 inline bool FXSYS_isDecimalDigit(const wchar_t c) {
72 return !!std::iswdigit(c);
73 }
74
FXSYS_DecimalCharToInt(const char c)75 inline int FXSYS_DecimalCharToInt(const char c) {
76 return FXSYS_isDecimalDigit(c) ? c - '0' : 0;
77 }
78
FXSYS_DecimalCharToInt(const wchar_t c)79 inline int FXSYS_DecimalCharToInt(const wchar_t c) {
80 return std::iswdigit(c) ? c - L'0' : 0;
81 }
82
83 void FXSYS_IntToTwoHexChars(uint8_t c, char* buf);
84
85 void FXSYS_IntToFourHexChars(uint16_t c, char* buf);
86
87 size_t FXSYS_ToUTF16BE(uint32_t unicode, char* buf);
88
89 uint32_t GetBits32(const uint8_t* pData, int bitpos, int nbits);
90
91 #endif // CORE_FXCRT_FX_EXTENSION_H_
92