src/third_party/jscre/ASCIICType.h
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00001 /* 00002 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 00014 * its contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 00018 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 00019 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00020 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 00021 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00022 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00023 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00024 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00025 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 00026 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 */ 00028 00029 #ifndef WTF_ASCIICType_h 00030 #define WTF_ASCIICType_h 00031 00032 // The behavior of many of the functions in the <ctype.h> header is dependent 00033 // on the current locale. But in the WebKit project, all uses of those functions 00034 // are in code processing something that's not locale-specific. These equivalents 00035 // for some of the <ctype.h> functions are named more explicitly, not dependent 00036 // on the C library locale, and we should also optimize them as needed. 00037 00038 // All functions return false or leave the character unchanged if passed a character 00039 // that is outside the range 0-7F. So they can be used on Unicode strings or 00040 // characters if the intent is to do processing only if the character is ASCII. 00041 00042 inline bool isASCIIAlpha(char c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 00043 inline bool isASCIIAlpha(unsigned short c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 00044 inline bool isASCIIAlpha(int c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 00045 00046 inline bool isASCIIAlphanumeric(char c) { return c >= '0' && c <= '9' || (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 00047 inline bool isASCIIAlphanumeric(unsigned short c) { return c >= '0' && c <= '9' || (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 00048 inline bool isASCIIAlphanumeric(int c) { return c >= '0' && c <= '9' || (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 00049 00050 inline bool isASCIIDigit(char c) { return (c >= '0') & (c <= '9'); } 00051 inline bool isASCIIDigit(unsigned short c) { return (c >= '0') & (c <= '9'); } 00052 inline bool isASCIIDigit(int c) { return (c >= '0') & (c <= '9'); } 00053 00054 inline bool isASCIIHexDigit(char c) { return c >= '0' && c <= '9' || (c | 0x20) >= 'a' && (c | 0x20) <= 'f'; } 00055 inline bool isASCIIHexDigit(unsigned short c) { return c >= '0' && c <= '9' || (c | 0x20) >= 'a' && (c | 0x20) <= 'f'; } 00056 inline bool isASCIIHexDigit(int c) { return c >= '0' && c <= '9' || (c | 0x20) >= 'a' && (c | 0x20) <= 'f'; } 00057 00058 inline bool isASCIILower(char c) { return c >= 'a' && c <= 'z'; } 00059 inline bool isASCIILower(unsigned short c) { return c >= 'a' && c <= 'z'; } 00060 inline bool isASCIILower(int c) { return c >= 'a' && c <= 'z'; } 00061 00062 inline bool isASCIIUpper(char c) { return c >= 'A' && c <= 'Z'; } 00063 inline bool isASCIIUpper(unsigned short c) { return c >= 'A' && c <= 'Z'; } 00064 inline bool isASCIIUpper(int c) { return c >= 'A' && c <= 'Z'; } 00065 00066 /* 00067 Statistics from a run of Apple's page load test for callers of isASCIISpace: 00068 00069 character count 00070 --------- ----- 00071 non-spaces 689383 00072 20 space 294720 00073 0A \n 89059 00074 09 \t 28320 00075 0D \r 0 00076 0C \f 0 00077 0B \v 0 00078 */ 00079 inline bool isASCIISpace(char c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 00080 inline bool isASCIISpace(unsigned short c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 00081 inline bool isASCIISpace(int c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 00082 00083 inline char toASCIILower(char c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 00084 inline unsigned short toASCIILower(unsigned short c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 00085 inline int toASCIILower(int c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 00086 00087 inline char toASCIIUpper(char c) { return static_cast<char>(c & ~((c >= 'a' && c <= 'z') << 5)); } 00088 inline unsigned short toASCIIUpper(unsigned short c) { return static_cast<unsigned short>(c & ~((c >= 'a' && c <= 'z') << 5)); } 00089 inline int toASCIIUpper(int c) { return static_cast<int>(c & ~((c >= 'a' && c <= 'z') << 5)); } 00090 00091 inline int toASCIIHexValue(char c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 00092 inline int toASCIIHexValue(unsigned short c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 00093 inline int toASCIIHexValue(int c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 00094 00095 #endif
