1// Copyright (c) 2010 The Chromium 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// The original source code is from: 6// https://code.google.com/p/libphonenumber/source/browse/trunk/cpp/src/phonenumbers/base/basictypes.h?r=621 7 8#if I18N_ADDRESSINPUT_USE_BASICTYPES_OVERRIDE 9 10// If building libaddressinput in an environment where there already is another 11// implementation of the basictypes.h header file (like in Chromium), then pass 12// the command line flag -DI18N_ADDRESSINPUT_USE_BASICTYPES_OVERRIDE=1 to the 13// compiler and provide a file named basictypes_override.h, in a location where 14// the compiler will look for it, which provides the desired implementation. 15 16#include "basictypes_override.h" 17 18#else 19 20#ifndef I18N_ADDRESSINPUT_UTIL_BASICTYPES_H_ 21#define I18N_ADDRESSINPUT_UTIL_BASICTYPES_H_ 22 23#include <climits> // So we can set the bounds of our types 24#include <cstddef> // For size_t 25 26#if !defined(_WIN32) 27// stdint.h is part of C99 but MSVC doesn't have it. 28#include <stdint.h> // For intptr_t. 29#endif 30 31#ifdef INT64_MAX 32 33// INT64_MAX is defined if C99 stdint.h is included; use the 34// native types if available. 35typedef int8_t int8; 36typedef int16_t int16; 37typedef int32_t int32; 38typedef int64_t int64; 39typedef uint8_t uint8; 40typedef uint16_t uint16; 41typedef uint32_t uint32; 42typedef uint64_t uint64; 43 44const uint8 kuint8max = UINT8_MAX; 45const uint16 kuint16max = UINT16_MAX; 46const uint32 kuint32max = UINT32_MAX; 47const uint64 kuint64max = UINT64_MAX; 48const int8 kint8min = INT8_MIN; 49const int8 kint8max = INT8_MAX; 50const int16 kint16min = INT16_MIN; 51const int16 kint16max = INT16_MAX; 52const int32 kint32min = INT32_MIN; 53const int32 kint32max = INT32_MAX; 54const int64 kint64min = INT64_MIN; 55const int64 kint64max = INT64_MAX; 56 57#else // !INT64_MAX 58 59typedef signed char int8; 60typedef short int16; 61// TODO: Remove these type guards. These are to avoid conflicts with 62// obsolete/protypes.h in the Gecko SDK. 63#ifndef _INT32 64#define _INT32 65typedef int int32; 66#endif 67 68// The NSPR system headers define 64-bit as |long| when possible. In order to 69// not have typedef mismatches, we do the same on LP64. 70#if __LP64__ 71typedef long int64; 72#else 73typedef long long int64; 74#endif 75 76// NOTE: unsigned types are DANGEROUS in loops and other arithmetical 77// places. Use the signed types unless your variable represents a bit 78// pattern (eg a hash value) or you really need the extra bit. Do NOT 79// use 'unsigned' to express "this value should always be positive"; 80// use assertions for this. 81 82typedef unsigned char uint8; 83typedef unsigned short uint16; 84// TODO: Remove these type guards. These are to avoid conflicts with 85// obsolete/protypes.h in the Gecko SDK. 86#ifndef _UINT32 87#define _UINT32 88typedef unsigned int uint32; 89#endif 90 91// See the comment above about NSPR and 64-bit. 92#if __LP64__ 93typedef unsigned long uint64; 94#else 95typedef unsigned long long uint64; 96#endif 97 98#endif // !INT64_MAX 99 100typedef signed char schar; 101 102// A type to represent a Unicode code-point value. As of Unicode 4.0, 103// such values require up to 21 bits. 104// (For type-checking on pointers, make this explicitly signed, 105// and it should always be the signed version of whatever int32 is.) 106typedef signed int char32; 107 108// A macro to disallow the copy constructor and operator= functions 109// This should be used in the private: declarations for a class 110#if !defined(DISALLOW_COPY_AND_ASSIGN) 111#define DISALLOW_COPY_AND_ASSIGN(TypeName) \ 112 TypeName(const TypeName&); \ 113 void operator=(const TypeName&) 114#endif 115 116// The arraysize(arr) macro returns the # of elements in an array arr. 117// The expression is a compile-time constant, and therefore can be 118// used in defining new arrays, for example. If you use arraysize on 119// a pointer by mistake, you will get a compile-time error. 120// 121// One caveat is that arraysize() doesn't accept any array of an 122// anonymous type or a type defined inside a function. In these rare 123// cases, you have to use the unsafe ARRAYSIZE_UNSAFE() macro below. This is 124// due to a limitation in C++'s template system. The limitation might 125// eventually be removed, but it hasn't happened yet. 126 127// This template function declaration is used in defining arraysize. 128// Note that the function doesn't need an implementation, as we only 129// use its type. 130template <typename T, size_t N> 131char (&ArraySizeHelper(T (&array)[N]))[N]; 132 133// That gcc wants both of these prototypes seems mysterious. VC, for 134// its part, can't decide which to use (another mystery). Matching of 135// template overloads: the final frontier. 136#ifndef _MSC_VER 137template <typename T, size_t N> 138char (&ArraySizeHelper(const T (&array)[N]))[N]; 139#endif 140 141#if !defined(arraysize) 142#define arraysize(array) (sizeof(ArraySizeHelper(array))) 143#endif 144 145// ARRAYSIZE_UNSAFE performs essentially the same calculation as arraysize, 146// but can be used on anonymous types or types defined inside 147// functions. It's less safe than arraysize as it accepts some 148// (although not all) pointers. Therefore, you should use arraysize 149// whenever possible. 150// 151// The expression ARRAYSIZE_UNSAFE(a) is a compile-time constant of type 152// size_t. 153// 154// ARRAYSIZE_UNSAFE catches a few type errors. If you see a compiler error 155// 156// "warning: division by zero in ..." 157// 158// when using ARRAYSIZE_UNSAFE, you are (wrongfully) giving it a pointer. 159// You should only use ARRAYSIZE_UNSAFE on statically allocated arrays. 160// 161// The following comments are on the implementation details, and can 162// be ignored by the users. 163// 164// ARRAYSIZE_UNSAFE(arr) works by inspecting sizeof(arr) (the # of bytes in 165// the array) and sizeof(*(arr)) (the # of bytes in one array 166// element). If the former is divisible by the latter, perhaps arr is 167// indeed an array, in which case the division result is the # of 168// elements in the array. Otherwise, arr cannot possibly be an array, 169// and we generate a compiler error to prevent the code from 170// compiling. 171// 172// Since the size of bool is implementation-defined, we need to cast 173// !(sizeof(a) & sizeof(*(a))) to size_t in order to ensure the final 174// result has type size_t. 175// 176// This macro is not perfect as it wrongfully accepts certain 177// pointers, namely where the pointer size is divisible by the pointee 178// size. Since all our code has to go through a 32-bit compiler, 179// where a pointer is 4 bytes, this means all pointers to a type whose 180// size is 3 or greater than 4 will be (righteously) rejected. 181 182#if !defined(ARRAYSIZE_UNSAFE) 183#define ARRAYSIZE_UNSAFE(a) \ 184 ((sizeof(a) / sizeof(*(a))) / \ 185 static_cast<size_t>(!(sizeof(a) % sizeof(*(a))))) 186#endif 187 188// The COMPILE_ASSERT macro can be used to verify that a compile time 189// expression is true. For example, you could use it to verify the 190// size of a static array: 191// 192// COMPILE_ASSERT(ARRAYSIZE_UNSAFE(content_type_names) == CONTENT_NUM_TYPES, 193// content_type_names_incorrect_size); 194// 195// or to make sure a struct is smaller than a certain size: 196// 197// COMPILE_ASSERT(sizeof(foo) < 128, foo_too_large); 198// 199// The second argument to the macro is the name of the variable. If 200// the expression is false, most compilers will issue a warning/error 201// containing the name of the variable. 202 203template <bool> 204struct CompileAssert { 205}; 206 207#if !defined(COMPILE_ASSERT) 208#define COMPILE_ASSERT(expr, msg) \ 209 typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1] 210#endif 211 212#endif // I18N_ADDRESSINPUT_UTIL_BASICTYPES_H_ 213#endif // I18N_ADDRESSINPUT_USE_BASICTYPES_OVERRIDE 214