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// 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 <cctype>
#include <cwctype>
#include <limits>
#include "core/fxcrt/fx_extension.h"
#include "core/fxcrt/fx_string.h"
template <typename IntType, typename CharType>
IntType FXSYS_StrToInt(const CharType* str) {
if (!str)
return 0;
// Process the sign.
bool neg = *str == '-';
if (neg || *str == '+')
str++;
IntType num = 0;
while (*str && FXSYS_isDecimalDigit(*str)) {
IntType val = FXSYS_toDecimalDigit(*str);
if (num > (std::numeric_limits<IntType>::max() - val) / 10) {
if (neg && std::numeric_limits<IntType>::is_signed) {
// Return MIN when the represented number is signed type and is smaller
// than the min value.
return std::numeric_limits<IntType>::min();
} else {
// Return MAX when the represented number is signed type and is larger
// than the max value, or the number is unsigned type and out of range.
return std::numeric_limits<IntType>::max();
}
}
num = num * 10 + val;
str++;
}
// When it is a negative value, -num should be returned. Since num may be of
// unsigned type, use ~num + 1 to avoid the warning of applying unary minus
// operator to unsigned type.
return neg ? ~num + 1 : num;
}
template <typename T, typename UT, typename STR_T>
STR_T FXSYS_IntToStr(T value, STR_T str, int radix) {
if (radix < 2 || radix > 16) {
str[0] = 0;
return str;
}
if (value == 0) {
str[0] = '0';
str[1] = 0;
return str;
}
int i = 0;
UT uvalue;
if (value < 0) {
str[i++] = '-';
// Standard trick to avoid undefined behaviour when negating INT_MIN.
uvalue = static_cast<UT>(-(value + 1)) + 1;
} else {
uvalue = value;
}
int digits = 1;
T order = uvalue / radix;
while (order > 0) {
digits++;
order = order / radix;
}
for (int d = digits - 1; d > -1; d--) {
str[d + i] = "0123456789abcdef"[uvalue % radix];
uvalue /= radix;
}
str[digits + i] = 0;
return str;
}
#ifdef __cplusplus
extern "C" {
#endif
int32_t FXSYS_atoi(const char* str) {
return FXSYS_StrToInt<int32_t, char>(str);
}
uint32_t FXSYS_atoui(const char* str) {
return FXSYS_StrToInt<uint32_t>(str);
}
int32_t FXSYS_wtoi(const wchar_t* str) {
return FXSYS_StrToInt<int32_t, wchar_t>(str);
}
int64_t FXSYS_atoi64(const char* str) {
return FXSYS_StrToInt<int64_t, char>(str);
}
int64_t FXSYS_wtoi64(const wchar_t* str) {
return FXSYS_StrToInt<int64_t, wchar_t>(str);
}
const char* FXSYS_i64toa(int64_t value, char* str, int radix) {
return FXSYS_IntToStr<int64_t, uint64_t, char*>(value, str, radix);
}
#ifdef __cplusplus
}
#endif
#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
#ifdef __cplusplus
extern "C" {
#endif
int FXSYS_GetACP() {
return 0;
}
uint32_t FXSYS_GetFullPathName(const char* filename,
uint32_t buflen,
char* buf,
char** filepart) {
int srclen = FXSYS_strlen(filename);
if (!buf || (int)buflen < srclen + 1)
return srclen + 1;
strncpy(buf, filename, buflen);
return srclen;
}
uint32_t FXSYS_GetModuleFileName(void* hModule, char* buf, uint32_t bufsize) {
return 0xFFFFFFFF;
}
#ifdef __cplusplus
}
#endif
#endif
#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
#ifdef __cplusplus
extern "C" {
#endif
char* FXSYS_strlwr(char* str) {
if (!str) {
return nullptr;
}
char* s = str;
while (*str) {
*str = FXSYS_tolower(*str);
str++;
}
return s;
}
char* FXSYS_strupr(char* str) {
if (!str) {
return nullptr;
}
char* s = str;
while (*str) {
*str = FXSYS_toupper(*str);
str++;
}
return s;
}
wchar_t* FXSYS_wcslwr(wchar_t* str) {
if (!str) {
return nullptr;
}
wchar_t* s = str;
while (*str) {
*str = FXSYS_tolower(*str);
str++;
}
return s;
}
wchar_t* FXSYS_wcsupr(wchar_t* str) {
if (!str) {
return nullptr;
}
wchar_t* s = str;
while (*str) {
*str = FXSYS_toupper(*str);
str++;
}
return s;
}
int FXSYS_stricmp(const char* dst, const char* src) {
int f;
int l;
do {
f = FXSYS_toupper(*dst);
l = FXSYS_toupper(*src);
++dst;
++src;
} while (f && f == l);
return f - l;
}
int FXSYS_wcsicmp(const wchar_t* dst, const wchar_t* src) {
wchar_t f;
wchar_t l;
do {
f = FXSYS_toupper(*dst);
l = FXSYS_toupper(*src);
++dst;
++src;
} while (f && f == l);
return f - l;
}
char* FXSYS_itoa(int value, char* str, int radix) {
return FXSYS_IntToStr<int32_t, uint32_t, char*>(value, str, radix);
}
#ifdef __cplusplus
}
#endif
#endif
#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
#ifdef __cplusplus
extern "C" {
#endif
int FXSYS_WideCharToMultiByte(uint32_t codepage,
uint32_t dwFlags,
const wchar_t* wstr,
int wlen,
char* buf,
int buflen,
const char* default_str,
int* pUseDefault) {
int len = 0;
for (int i = 0; i < wlen; i++) {
if (wstr[i] < 0x100) {
if (buf && len < buflen)
buf[len] = static_cast<char>(wstr[i]);
len++;
}
}
return len;
}
int FXSYS_MultiByteToWideChar(uint32_t codepage,
uint32_t dwFlags,
const char* bstr,
int blen,
wchar_t* buf,
int buflen) {
int wlen = 0;
for (int i = 0; i < blen; i++) {
if (buf && wlen < buflen) {
buf[wlen] = bstr[i];
}
wlen++;
}
return wlen;
}
#ifdef __cplusplus
}
#endif
#endif
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