/**

  * vim: set ts=4 :

  * =============================================================================

  * SourceMod

  * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.

  * =============================================================================

  *

  * This program is free software; you can redistribute it and/or modify it under

  * the terms of the GNU General Public License, version 3.0, as published by the

  * Free Software Foundation.

  * 

  * This program is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more

  * details.

  *

  * You should have received a copy of the GNU General Public License along with

  * this program.  If not, see <http://www.gnu.org/licenses/>.

  *

  * As a special exception, AlliedModders LLC gives you permission to link the

  * code of this program (as well as its derivative works) to "Half-Life 2," the

  * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

  * by the Valve Corporation.  You must obey the GNU General Public License in

  * all respects for all other code used.  Additionally, AlliedModders LLC grants

  * this exception to all derivative works.  AlliedModders LLC defines further

  * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

  * or <http://www.sourcemod.net/license.php>.

  *

  * Version: $Id$

  */

 #include <stdlib.h>

 #include <ctype.h>

 #include <stdarg.h>

 #include "sm_stringutil.h"

 #include "Logger.h"

 #include "PluginSys.h"

 #include "PlayerManager.h"

 #include "logic_bridge.h"

 #define LADJUST			0x00000004		/* left adjustment */

 #define ZEROPAD			0x00000080		/* zero (as opposed to blank) pad */

 #define UPPERDIGITS		0x00000200		/* make alpha digits uppercase */

 #define to_digit(c)		((c) - '0')

 #define is_digit(c)		((unsigned)to_digit(c) <= 9)

 #define CHECK_ARGS(x) \

 	if ((arg+x) > args) { \

 		pCtx->ThrowNativeErrorEx(SP_ERROR_PARAM, "String formatted incorrectly - parameter %d (total %d)", arg, args); \

 		return 0; \

 	}

 inline void ReorderTranslationParams(const Translation *pTrans, cell_t *params)

 {

 	cell_t new_params[MAX_TRANSLATE_PARAMS];

 	for (unsigned int i = 0; i < pTrans->fmt_count; i++)

 	{

 		new_params[i] = params[pTrans->fmt_order[i]];

 	}

 	memcpy(params, new_params, pTrans->fmt_count * sizeof(cell_t));

 }

 size_t Translate(char *buffer,

 				 size_t maxlen,

 				 IPluginContext *pCtx,

 				 const char *key,

 				 cell_t target,

 				 const cell_t *params,

 				 int *arg,

 				 bool *error)

 {

 	unsigned int langid;

 	*error = false;

 	Translation pTrans;

 	CPlugin *pl = (CPlugin *)g_PluginSys.FindPluginByContext(pCtx->GetContext());

 	unsigned int max_params = 0;

 	IPhraseCollection *pPhrases;

 	pPhrases = pl->GetPhrases();

 try_serverlang:

 	if (target == SOURCEMOD_SERVER_LANGUAGE)

 	{

 		langid = translator->GetServerLanguage();

  	}

 	else if ((target >= 1) && (target <= g_Players.GetMaxClients()))

 	{

 		langid = translator->GetClientLanguage(target);

 	}

 	else

 	{

 		pCtx->ThrowNativeErrorEx(SP_ERROR_PARAM, "Translation failed: invalid client index %d", target);

 		goto error_out;

 	}

 	if (pPhrases->FindTranslation(key, langid, &pTrans) != Trans_Okay)

 	{

 		if (target != SOURCEMOD_SERVER_LANGUAGE && langid != translator->GetServerLanguage())

 		{

 			target = SOURCEMOD_SERVER_LANGUAGE;

 			goto try_serverlang;

 		}

 		else if (langid != SOURCEMOD_LANGUAGE_ENGLISH)

 		{

 			if (pPhrases->FindTranslation(key, SOURCEMOD_LANGUAGE_ENGLISH, &pTrans) != Trans_Okay)

 			{

 				pCtx->ThrowNativeErrorEx(SP_ERROR_PARAM, "Language phrase \"%s\" not found", key);

 				goto error_out;

 			}

 		}

 		else

 		{

 			pCtx->ThrowNativeErrorEx(SP_ERROR_PARAM, "Language phrase \"%s\" not found", key);

 			goto error_out;

 		}

 	}

 	max_params = pTrans.fmt_count;

 	if (max_params)

 	{

 		cell_t new_params[MAX_TRANSLATE_PARAMS];

 		/* Check if we're going to over the limit */

 		if ((*arg) + (max_params - 1) > (size_t)params[0])

 		{

 			pCtx->ThrowNativeErrorEx(SP_ERROR_PARAMS_MAX, 

 				"Translation string formatted incorrectly - missing at least %d parameters", 

 				((*arg + (max_params - 1)) - params[0])

 				);

 			goto error_out;

 		}

 		/* If we need to re-order the parameters, do so with a temporary array.

 		 * Otherwise, we could run into trouble with continual formats, a la ShowActivity().

 		 */

 		memcpy(new_params, params, sizeof(cell_t) * (params[0] + 1));

 		ReorderTranslationParams(&pTrans, &new_params[*arg]);

 		return atcprintf(buffer, maxlen, pTrans.szPhrase, pCtx, new_params, arg);

 	}

 	else

 	{

 		return atcprintf(buffer, maxlen, pTrans.szPhrase, pCtx, params, arg);

 	}

 error_out:

 	*error = true;

 	return 0;

 }

 void AddString(char **buf_p, size_t &maxlen, const char *string, int width, int prec)

 {

 	int size = 0;

 	char *buf;

 	static char nlstr[] = {'(','n','u','l','l',')','\0'};

 	buf = *buf_p;

 	if (string == NULL)

 	{

 		string = nlstr;

 		prec = -1;

 	}

 	if (prec >= 0)

 	{

 		for (size = 0; size < prec; size++) 

 		{

 			if (string[size] == '\0')

 			{

 				break;

 			}

 		}

 	}

 	else

 	{

 		while (string[size++]);

 		size--;

 	}

 	if (size > (int)maxlen)

 	{

 		size = maxlen;

 	}

 	maxlen -= size;

 	width -= size;

 	while (size--)

 	{

 		*buf++ = *string++;

 	}

 	while ((width-- > 0) && maxlen)

 	{

 		*buf++ = ' ';

 		maxlen--;

 	}

 	*buf_p = buf;

 }

 void AddFloat(char **buf_p, size_t &maxlen, double fval, int width, int prec, int flags)

 {

 	int digits;					// non-fraction part digits

 	double tmp;					// temporary

 	char *buf = *buf_p;			// output buffer pointer

 	int val;					// temporary

 	int sign = 0;				// 0: positive, 1: negative

 	int fieldlength;			// for padding

 	int significant_digits = 0;	// number of significant digits written

 	const int MAX_SIGNIFICANT_DIGITS = 16;

 	// default precision

 	if (prec < 0)

 	{

 		prec = 6;

 	}

 	// get the sign

 	if (fval < 0)

 	{

 		fval = -fval;

 		sign = 1;

 	}

 	// compute whole-part digits count

 	digits = (int)log10(fval) + 1;

 	// Only print 0.something if 0 < fval < 1

 	if (digits < 1)

 	{

 		digits = 1;

 	}

 	// compute the field length

 	fieldlength = digits + prec + ((prec > 0) ? 1 : 0) + sign;

 	// minus sign BEFORE left padding if padding with zeros

 	if (sign && maxlen && (flags & ZEROPAD))

 	{

 		*buf++ = '-';

 		maxlen--;

 	}

 	// right justify if required

 	if ((flags & LADJUST) == 0)

 	{

 		while ((fieldlength < width) && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			width--;

 			maxlen--;

 		}

 	}

 	// minus sign AFTER left padding if padding with spaces

 	if (sign && maxlen && !(flags & ZEROPAD))

 	{

 		*buf++ = '-';

 		maxlen--;

 	}

 	// write the whole part

 	tmp = pow(10.0, digits-1);

 	while ((digits--) && maxlen)

 	{

 		if (++significant_digits > MAX_SIGNIFICANT_DIGITS)

 		{

 			*buf++ = '0';

 		}

 		else

 		{

 			val = (int)(fval / tmp);

 			*buf++ = '0' + val;

 			fval -= val * tmp;

 			tmp *= 0.1;

 		}

 		maxlen--;

 	}

 	// write the fraction part

 	if (maxlen && prec)

 	{

 		*buf++ = '.';

 		maxlen--;

 	}

 	tmp = pow(10.0, prec);

 	fval *= tmp;

 	while (prec-- && maxlen)

 	{

 		if (++significant_digits > MAX_SIGNIFICANT_DIGITS)

 		{

 			*buf++ = '0';

 		}

 		else

 		{

 			tmp *= 0.1;

 			val = (int)(fval / tmp);

 			*buf++ = '0' + val;

 			fval -= val * tmp;

 		}

 		maxlen--;

 	}

 	// left justify if required

 	if (flags & LADJUST)

 	{

 		while ((fieldlength < width) && maxlen)

 		{

 			// right-padding only with spaces, ZEROPAD is ignored

 			*buf++ = ' ';

 			width--;

 			maxlen--;

 		}

 	}

 	// update parent's buffer pointer

 	*buf_p = buf;

 }

 void AddBinary(char **buf_p, size_t &maxlen, unsigned int val, int width, int flags)

 {

 	char text[32];

 	int digits;

 	char *buf;

 	digits = 0;

 	do

 	{

 		if (val & 1)

 		{

 			text[digits++] = '1';

 		}

 		else

 		{

 			text[digits++] = '0';

 		}

 		val >>= 1;

 	} while (val);

 	buf = *buf_p;

 	if (!(flags & LADJUST))

 	{

 		while (digits < width && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			width--;

 			maxlen--;

 		}

 	}

 	while (digits-- && maxlen)

 	{

 		*buf++ = text[digits];

 		width--;

 		maxlen--;

 	}

 	if (flags & LADJUST)

 	{

 		while (width-- && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			maxlen--;

 		}

 	}

 	*buf_p = buf;

 }

 void AddUInt(char **buf_p, size_t &maxlen, unsigned int val, int width, int flags)

 {

 	char text[32];

 	int digits;

 	char *buf;

 	digits = 0;

 	do

 	{

 		text[digits++] = '0' + val % 10;

 		val /= 10;

 	} while (val);

 	buf = *buf_p;

 	if (!(flags & LADJUST))

 	{

 		while (digits < width && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			width--;

 			maxlen--;

 		}

 	}

 	while (digits-- && maxlen)

 	{

 		*buf++ = text[digits];

 		width--;

 		maxlen--;

 	}

 	if (flags & LADJUST)

 	{

 		while (width-- && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			maxlen--;

 		}

 	}

 	*buf_p = buf;

 }

 void AddInt(char **buf_p, size_t &maxlen, int val, int width, int flags)

 {

 	char text[32];

 	int digits;

 	int signedVal;

 	char *buf;

 	unsigned int unsignedVal;

 	digits = 0;

 	signedVal = val;

 	if (val < 0)

 	{

 		/* we want the unsigned version */

 		unsignedVal = abs(val);

 	}

 	else

 	{

 		unsignedVal = val;

 	}

 	do

 	{

 		text[digits++] = '0' + unsignedVal % 10;

 		unsignedVal /= 10;

 	} while (unsignedVal);

 	if (signedVal < 0)

 	{

 		text[digits++] = '-';

 	}

 	buf = *buf_p;

 	if (!(flags & LADJUST))

 	{

 		while ((digits < width) && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			width--;

 			maxlen--;

 		}

 	}

 	while (digits-- && maxlen)

 	{

 		*buf++ = text[digits];

 		width--;

 		maxlen--;

 	}

 	if (flags & LADJUST)

 	{

 		while (width-- && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			maxlen--;

 		}

 	}

 	*buf_p = buf;

 }

 void AddHex(char **buf_p, size_t &maxlen, unsigned int val, int width, int flags)

 {

 	char text[32];

 	int digits;

 	char *buf;

 	char digit;

 	int hexadjust;

 	if (flags & UPPERDIGITS)

 	{

 		hexadjust = 'A' - '9' - 1;

 	}

 	else

 	{

 		hexadjust = 'a' - '9' - 1;

 	}

 	digits = 0;

 	do 

 	{

 		digit = ('0' + val % 16);

 		if (digit > '9')

 		{

 			digit += hexadjust;

 		}

 		text[digits++] = digit;

 		val /= 16;

 	} while(val);

 	buf = *buf_p;

 	if (!(flags & LADJUST))

 	{

 		while (digits < width && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			width--;

 			maxlen--;

 		}

 	}

 	while (digits-- && maxlen)

 	{

 		*buf++ = text[digits];

 		width--;

 		maxlen--;

 	}

 	if (flags & LADJUST)

 	{

 		while (width-- && maxlen)

 		{

 			*buf++ = (flags & ZEROPAD) ? '0' : ' ';

 			maxlen--;

 		}

 	}

 	*buf_p = buf;

 }

 bool gnprintf(char *buffer,

 			  size_t maxlen,

 			  const char *format,

 			  IPhraseCollection *pPhrases,

 			  void **params,

 			  unsigned int numparams,

 			  unsigned int &curparam,

 			  size_t *pOutLength,

 			  const char **pFailPhrase)

 {

 	if (!buffer || !maxlen)

 	{

 		if (pOutLength != NULL)

 		{

 			*pOutLength = 0;

 		}

 		return true;

 	}

 	if (numparams > MAX_TRANSLATE_PARAMS)

 	{

 		if (pFailPhrase != NULL)

 		{

 			*pFailPhrase = NULL;

 		}

 		return false;

 	}

 	int arg = 0;

 	char *buf_p;

 	char ch;

 	int flags;

 	int width;

 	int prec;

 	int n;

 	char sign;

 	const char *fmt;

 	size_t llen = maxlen - 1;

 	buf_p = buffer;

 	fmt = format;

 	while (true)

 	{

 		// run through the format string until we hit a '%' or '\0'

 		for (ch = *fmt; llen && ((ch = *fmt) != '\0') && (ch != '%'); fmt++)

 		{

 			*buf_p++ = ch;

 			llen--;

 		}

 		if ((ch == '\0') || (llen <= 0))

 		{

 			goto done;

 		}

 		// skip over the '%'

 		fmt++;

 		// reset formatting state

 		flags = 0;

 		width = 0;

 		prec = -1;

 		sign = '\0';

 rflag:

 		ch = *fmt++;

 reswitch:

 		switch(ch)

 		{

 		case '-':

 			{

 				flags |= LADJUST;

 				goto rflag;

 			}

 		case '.':

 			{

 				n = 0;

 				while(is_digit((ch = *fmt++)))

 				{

 					n = 10 * n + (ch - '0');

 				}

 				prec = (n < 0) ? -1 : n;

 				goto reswitch;

 			}

 		case '0':

 			{

 				flags |= ZEROPAD;

 				goto rflag;

 			}

 		case '1':

 		case '2':

 		case '3':

 		case '4':

 		case '5':

 		case '6':

 		case '7':

 		case '8':

 		case '9':

 			{

 				n = 0;

 				do

 				{

 					n = 10 * n + (ch - '0');

 					ch = *fmt++;

 				} while(is_digit(ch));

 				width = n;

 				goto reswitch;

 			}

 		case 'c':

 			{

 				if (!llen)

 				{

 					goto done;

 				}

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				char *c = (char *)params[curparam];

 				curparam++;

 				*buf_p++ = *c;

 				llen--;

 				arg++;

 				break;

 			}

 		case 'b':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				int *value = (int *)params[curparam];

 				curparam++;

 				AddBinary(&buf_p, llen, *value, width, flags);

 				arg++;

 				break;

 			}

 		case 'd':

 		case 'i':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				int *value = (int *)params[curparam];

 				curparam++;

 				AddInt(&buf_p, llen, *value, width, flags);

 				arg++;

 				break;

 			}

 		case 'u':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				unsigned int *value = (unsigned int *)params[curparam];

 				curparam++;

 				AddUInt(&buf_p, llen, *value, width, flags);

 				arg++;

 				break;

 			}

 		case 'f':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				float *value = (float *)params[curparam];

 				curparam++;

 				AddFloat(&buf_p, llen, *value, width, prec, flags);

 				arg++;

 				break;

 			}

 		case 's':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				const char *str = (const char *)params[curparam];

 				curparam++;

 				AddString(&buf_p, llen, str, width, prec);

 				arg++;

 				break;

 			}

 		case 'T':

 		case 't':

 			{

 				int target;

 				const char *key;

 				size_t out_length;

 				Translation trans;

 				unsigned int lang_id;

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				key = (const char *)(params[curparam]);

 				curparam++;

 				if (ch == 'T')

 				{

 					if (curparam >= numparams)

 					{

 						if (pFailPhrase != NULL)

 						{

 							*pFailPhrase = NULL;

 						}

 						return false;

 					}

 					target = *((int *)(params[curparam]));

 					curparam++;

 				}

 				else

 				{

 					target = translator->GetGlobalTarget();

 				}

 try_again:

 				if (target == SOURCEMOD_SERVER_LANGUAGE)

 				{

 					lang_id = translator->GetServerLanguage();

 				}

 				else if (target >= 1 && target <= g_Players.GetMaxClients())

 				{

 					lang_id = translator->GetClientLanguage(target);

 				}

 				else

 				{

 					lang_id = translator->GetServerLanguage();

 				}

 				if (pPhrases == NULL)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = key;

 					}

 					return false;

 				}

 				if (pPhrases->FindTranslation(key, lang_id, &trans) != Trans_Okay)

 				{

 					if (target != SOURCEMOD_SERVER_LANGUAGE && lang_id != translator->GetServerLanguage())

 					{

 						target = SOURCEMOD_SERVER_LANGUAGE;

 						goto try_again;

 					}

 					else if (lang_id != SOURCEMOD_LANGUAGE_ENGLISH)

 					{

 						if (pPhrases->FindTranslation(key, SOURCEMOD_LANGUAGE_ENGLISH, &trans) != Trans_Okay)

 						{

 							if (pFailPhrase != NULL)

 							{

 								*pFailPhrase = key;

 							}

 							return false;

 						}

 					}

 					else

 					{

 						if (pFailPhrase != NULL)

 						{

 							*pFailPhrase = key;

 						}

 						return false;

 					}

 				}

 				if (trans.fmt_count)

 				{

 					unsigned int i;

 					void *new_params[MAX_TRANSLATE_PARAMS];

 					if (curparam + trans.fmt_count > numparams)

 					{

 						if (pFailPhrase != NULL)

 						{

 							*pFailPhrase = NULL;

 						}

 						return false;

 					}

 					/* Copy the array and re-order the stack */

 					memcpy(new_params, params, sizeof(void *) * numparams);

 					for (i = 0; i < trans.fmt_count; i++)

 					{

 						new_params[curparam + i] = const_cast<void *>(params[curparam + trans.fmt_order[i]]);

 					}

 					if (!gnprintf(buf_p,

 							llen,

 							trans.szPhrase,

 							pPhrases,

 							new_params,

 							numparams,

 							curparam,

 							&out_length,

 							pFailPhrase))

 					{

 						return false;

 					}

 				}

 				else

 				{

 					if (!gnprintf(buf_p,

 						llen,

 						trans.szPhrase,

 						pPhrases,

 						params,

 						numparams,

 						curparam,

 						&out_length,

 						pFailPhrase))

 					{

 						return false;

 					}

 				}

 				buf_p += out_length;

 				llen -= out_length;

 				break;

 			}

 		case 'X':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				unsigned int *value = (unsigned int *)params[curparam];

 				curparam++;

 				flags |= UPPERDIGITS;

 				AddHex(&buf_p, llen, *value, width, flags);

 				arg++;

 				break;

 			}

 		case 'x':

 			{

 				if (curparam >= numparams)

 				{

 					if (pFailPhrase != NULL)

 					{

 						*pFailPhrase = NULL;

 					}

 					return false;

 				}

 				unsigned int *value = (unsigned int *)params[curparam];

 				curparam++;

 				AddHex(&buf_p, llen, *value, width, flags);

 				arg++;

 				break;