//========= Copyright Valve Corporation ============//
#pragma once

#include <string>
#include <stdint.h>
#include <sys/types.h>

/** returns true if the string has the prefix */
bool StringHasPrefix(const std::string &sString, const std::string &sPrefix);
bool StringHasPrefixCaseSensitive(const std::string &sString, const std::string &sPrefix);

/** returns if the string has the suffix */
bool StringHasSuffix(const std::string &sString, const std::string &sSuffix);
bool StringHasSuffixCaseSensitive(const std::string &sString, const std::string &sSuffix);

/** converts a UTF-16 string to a UTF-8 string */
std::string UTF16to8(const wchar_t *in);

/** converts a UTF-8 string to a UTF-16 string */
std::wstring UTF8to16(const char *in);
#define Utf16FromUtf8 UTF8to16

/** safely copy a string into a buffer */
void strcpy_safe(char *pchBuffer, size_t unBufferSizeBytes, const char *pchSource);
template <size_t bufferSize>
void strcpy_safe(char (&buffer)[bufferSize], const char *pchSource)
{
	strcpy_safe(buffer, bufferSize, pchSource);
}

/** converts a string to upper case */
std::string StringToUpper(const std::string &sString);

/** converts a string to lower case */
std::string StringToLower(const std::string &sString);

// we stricmp (from WIN) but it isn't POSIX - OSX/LINUX have strcasecmp so just inline bridge to it
#if defined(OSX) || defined(LINUX)
#ifndef __THROW  // If __THROW is defined, these will clash with throw() versions on gcc
#include <strings.h>
inline int stricmp(const char *pStr1, const char *pStr2)
{
	return strcasecmp(pStr1, pStr2);
}
#ifndef _stricmp
#define _stricmp stricmp
#endif
inline int strnicmp(const char *pStr1, const char *pStr2, size_t unBufferLen)
{
	return strncasecmp(pStr1, pStr2, unBufferLen);
}
#define _strnicmp strnicmp
#endif

#ifndef _vsnprintf_s
#define _vsnprintf_s vsnprintf
#endif

#define _TRUNCATE ((size_t)-1)

#endif  // defined( OSX ) || defined( LINUX )

#if defined(OSX)
// behaviors ensure NULL-termination at least as well as _TRUNCATE does, but
// wcsncpy_s/strncpy_s can non-NULL-terminate, wcslcpy/strlcpy can not.
inline errno_t wcsncpy_s(wchar_t *strDest, size_t numberOfElements, const wchar_t *strSource, size_t count)
{
	return wcslcpy(strDest, strSource, numberOfElements);
}

inline errno_t strncpy_s(char *strDest, size_t numberOfElements, const char *strSource, size_t count)
{
	return strlcpy(strDest, strSource, numberOfElements);
}

#endif

#if defined(LINUX)
// this implementation does not return whether or not the destination was
// truncated, but that is straightforward to fix if anybody actually needs the
// return code.
#include "string.h"
inline void wcsncpy_s(wchar_t *strDest, size_t numberOfElements, const wchar_t *strSource, size_t count)
{
	wcsncpy(strDest, strSource, numberOfElements);
	strDest[numberOfElements - 1] = '\0';
}

inline void strncpy_s(char *strDest, size_t numberOfElements, const char *strSource, size_t count)
{
	strncpy(strDest, strSource, numberOfElements);
	strDest[numberOfElements - 1] = '\0';
}

#endif

#if defined(_WIN32) && _MSC_VER < 1800
inline uint64_t strtoull(const char *str, char **endptr, int base)
{
	return _strtoui64(str, endptr, base);
}
#endif

/* Handles copying a std::string into a buffer as would be provided in an API */
uint32_t ReturnStdString(const std::string &sValue, char *pchBuffer, uint32_t unBufferLen);

/* Handles copying a buffer into an std::string and auto adds null terminator */
void BufferToStdString(std::string &sDest, const char *pchBuffer, uint32_t unBufferLen);

/** Returns a std::string from a uint64_t */
std::string Uint64ToString(uint64_t ulValue);

/** returns a uint64_t from a string */
uint64_t StringToUint64(const std::string &sValue);

//-----------------------------------------------------------------------------
// Purpose: Encodes a string (or binary data) from URL encoding format, see rfc1738 section 2.2.
//          This version of the call isn't a strict RFC implementation, but uses + for space as is
//          the standard in HTML form encoding, despite it not being part of the RFC.
//
//          Dest buffer should be at least as large as source buffer to guarantee room for decode.
//-----------------------------------------------------------------------------
void V_URLEncode(char *pchDest, int nDestLen, const char *pchSource, int nSourceLen);

//-----------------------------------------------------------------------------
// Purpose: Decodes a string (or binary data) from URL encoding format, see rfc1738 section 2.2.
//          This version of the call isn't a strict RFC implementation, but uses + for space as is
//          the standard in HTML form encoding, despite it not being part of the RFC.
//
//          Dest buffer should be at least as large as source buffer to guarantee room for decode.
//			Dest buffer being the same as the source buffer (decode in-place) is explicitly allowed.
//-----------------------------------------------------------------------------
size_t V_URLDecode(char *pchDecodeDest, int nDecodeDestLen, const char *pchEncodedSource, int nEncodedSourceLen);

//-----------------------------------------------------------------------------
// Purpose: strip extension from a path
//-----------------------------------------------------------------------------
void V_StripExtension(std::string &in);