/*

Copyright (C) 1996-1997 Id Software, Inc.

Copyright (C) 2000-2020 DarkPlaces contributors

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

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.

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, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

// common.c -- misc functions used in client and server

#include <stdlib.h>

#include <fcntl.h>

#ifndef WIN32

#include <unistd.h>

#endif

#include "quakedef.h"

#include "utf8lib.h"

cvar_t registered = {CF_CLIENT | CF_SERVER | CF_READONLY, "registered","0", "indicates if this is running registered quake (whether gfx/pop.lmp was found)"};

cvar_t cmdline = {CF_CLIENT | CF_SERVER | CF_READONLY, "cmdline","0", "contains commandline the engine was launched with"};

// FIXME: Find a better place for these.

cvar_t cl_playermodel = {CF_CLIENT | CF_SERVER | CF_USERINFO | CF_ARCHIVE, "playermodel", "", "current player model in Nexuiz/Xonotic"};

cvar_t cl_playerskin = {CF_CLIENT | CF_SERVER | CF_USERINFO | CF_ARCHIVE, "playerskin", "", "current player skin in Nexuiz/Xonotic"};

char com_token[MAX_INPUTLINE];

unsigned com_token_len;

//===========================================================================

void SZ_Clear (sizebuf_t *buf)

{

buf->cursize = 0;

}

unsigned char *SZ_GetSpace (sizebuf_t *buf, int length)

{

unsigned char *data;

if (buf->cursize + length > buf->maxsize)

{

if (!buf->allowoverflow)

Host_Error ("SZ_GetSpace: overflow without allowoverflow set");

if (length > buf->maxsize)

Host_Error ("SZ_GetSpace: %i is > full buffer size", length);

buf->overflowed = true;

Con_Print("SZ_GetSpace: overflow\n");

SZ_Clear (buf);

}

data = buf->data + buf->cursize;

buf->cursize += length;

return data;

}

void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length)

{

memcpy (SZ_GetSpace(buf,length),data,length);

}

// LadyHavoc: thanks to Fuh for bringing the pure evil of SZ_Print to my

// attention, it has been eradicated from here, its only (former) use in

// all of darkplaces.

static const char *hexchar = "0123456789ABCDEF";

void Com_HexDumpToConsole(const unsigned char *data, int size)

{

int i, j, n;

char text[1024];

char *cur, *flushpointer;

const unsigned char *d;

cur = text;

flushpointer = text + 512;

for (i = 0;i < size;)

{

n = 16;

if (n > size - i)

n = size - i;

d = data + i;

// print offset

*cur++ = hexchar[(i >> 12) & 15];

*cur++ = hexchar[(i >> 8) & 15];

*cur++ = hexchar[(i >> 4) & 15];

*cur++ = hexchar[(i >> 0) & 15];

*cur++ = ':';

// print hex

for (j = 0;j < 16;j++)

{

if (j < n)

{

*cur++ = hexchar[(d[j] >> 4) & 15];

*cur++ = hexchar[(d[j] >> 0) & 15];

}

else

{

*cur++ = ' ';

*cur++ = ' ';

}

if ((j & 3) == 3)

*cur++ = ' ';

}

// print text

for (j = 0;j < 16;j++)

{

if (j < n)

{

// color change prefix character has to be treated specially

if (d[j] == STRING_COLOR_TAG)

{

*cur++ = STRING_COLOR_TAG;

*cur++ = STRING_COLOR_TAG;

}

else if (d[j] >= (unsigned char) ' ')

*cur++ = d[j];

else

*cur++ = '.';

}

else

*cur++ = ' ';

}

*cur++ = '\n';

i += n;

if (cur >= flushpointer || i >= size)

{

*cur++ = 0;

Con_Print(text);

cur = text;

}

}

}

void SZ_HexDumpToConsole(const sizebuf_t *buf)

{

Com_HexDumpToConsole(buf->data, buf->cursize);

}

//============================================================================

/*

==============

COM_Wordwrap

Word wraps a string. The wordWidth function is guaranteed to be called exactly

once for each word in the string, so it may be stateful, no idea what that

would be good for any more. At the beginning of the string, it will be called

for the char 0 to initialize a clean state, and then once with the string " "

(a space) so the routine knows how long a space is.

In case no single character fits into the given width, the wordWidth function

must return the width of exactly one character.

Wrapped lines get the isContinuation flag set and are continuationWidth less wide.

The sum of the return values of the processLine function will be returned.

==============

*/

int COM_Wordwrap(const char *string, size_t length, float continuationWidth, float maxWidth, COM_WordWidthFunc_t wordWidth, void *passthroughCW, COM_LineProcessorFunc processLine, void *passthroughPL)

{

// Logic is as follows:

//

// For each word or whitespace:

// Newline found? Output current line, advance to next line. This is not a continuation. Continue.

// Space found? Always add it to the current line, no matter if it fits.

// Word found? Check if current line + current word fits.

// If it fits, append it. Continue.

// If it doesn't fit, output current line, advance to next line. Append the word. This is a continuation. Continue.

qbool isContinuation = false;

float spaceWidth;

const char *startOfLine = string;

const char *cursor = string;

const char *end = string + length;

float spaceUsedInLine = 0;

float spaceUsedForWord;

int result = 0;

size_t wordLen;

size_t dummy;

dummy = 0;

wordWidth(passthroughCW, NULL, &dummy, -1);

dummy = 1;

spaceWidth = wordWidth(passthroughCW, " ", &dummy, -1);

for(;;)

{

char ch = (cursor < end) ? *cursor : 0;

switch(ch)

{

case 0: // end of string

result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);

goto out;

case '\n': // end of line

result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);

isContinuation = false;

++cursor;

startOfLine = cursor;

break;

case ' ': // space

++cursor;

spaceUsedInLine += spaceWidth;

break;

default: // word

wordLen = 1;

while(cursor + wordLen < end)

{

switch(cursor[wordLen])

{

case 0:

case '\n':

case ' ':

goto out_inner;

default:

++wordLen;

break;

}

}

out_inner:

spaceUsedForWord = wordWidth(passthroughCW, cursor, &wordLen, maxWidth - continuationWidth); // this may have reduced wordLen when it won't fit - but this is GOOD. TODO fix words that do fit in a non-continuation line

if(wordLen < 1) // cannot happen according to current spec of wordWidth

{

wordLen = 1;

spaceUsedForWord = maxWidth + 1; // too high, forces it in a line of itself

}

if(spaceUsedInLine + spaceUsedForWord <= maxWidth || cursor == startOfLine)

{

// we can simply append it

cursor += wordLen;

spaceUsedInLine += spaceUsedForWord;

}

else

{

// output current line

result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);

isContinuation = true;

startOfLine = cursor;

cursor += wordLen;

spaceUsedInLine = continuationWidth + spaceUsedForWord;

}

}

}

out:

return result;

/*

qbool isContinuation = false;

float currentWordSpace = 0;

const char *currentWord = 0;

float minReserve = 0;

float spaceUsedInLine = 0;

const char *currentLine = 0;

const char *currentLineEnd = 0;

float currentLineFinalWhitespace = 0;

const char *p;

int result = 0;

minReserve = charWidth(passthroughCW, 0);

minReserve += charWidth(passthroughCW, ' ');

if(maxWidth < continuationWidth + minReserve)

maxWidth = continuationWidth + minReserve;

charWidth(passthroughCW, 0);

for(p = string; p < string + length; ++p)

{

char c = *p;

float w = charWidth(passthroughCW, c);

if(!currentWord)

{

currentWord = p;

currentWordSpace = 0;

}

if(!currentLine)

{

currentLine = p;

spaceUsedInLine = isContinuation ? continuationWidth : 0;

currentLineEnd = 0;

}

if(c == ' ')

{

// 1. I can add the word AND a space - then just append it.

if(spaceUsedInLine + currentWordSpace + w <= maxWidth)

{

currentLineEnd = p; // note: space not included here

currentLineFinalWhitespace = w;

spaceUsedInLine += currentWordSpace + w;

}

// 2. I can just add the word - then append it, output current line and go to next one.

else if(spaceUsedInLine + currentWordSpace <= maxWidth)

{

result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);

currentLine = 0;

isContinuation = true;

}

// 3. Otherwise, output current line and go to next one, where I can add the word.

else if(continuationWidth + currentWordSpace + w <= maxWidth)

{

if(currentLineEnd)

result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);

currentLine = currentWord;

spaceUsedInLine = continuationWidth + currentWordSpace + w;

currentLineEnd = p;

currentLineFinalWhitespace = w;

isContinuation = true;

}

// 4. We can't even do that? Then output both current and next word as new lines.

else

{

if(currentLineEnd)

{

result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);

isContinuation = true;

}

result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);

currentLine = 0;

isContinuation = true;

}

currentWord = 0;

}

else if(c == '\n')

{

// 1. I can add the word - then do it.

if(spaceUsedInLine + currentWordSpace <= maxWidth)

{

result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);

}

// 2. Otherwise, output current line, next one and make tabula rasa.

else

{

if(currentLineEnd)

{

processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);

isContinuation = true;

}

result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);

}

currentWord = 0;

currentLine = 0;

isContinuation = false;

}

else

{

currentWordSpace += w;

if(

spaceUsedInLine + currentWordSpace > maxWidth // can't join this line...

&&

continuationWidth + currentWordSpace > maxWidth // can't join any other line...

)

{

// this word cannot join ANY line...

// so output the current line...

if(currentLineEnd)

{

result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);

isContinuation = true;

}

// then this word's beginning...

if(isContinuation)

{

// it may not fit, but we know we have to split it into maxWidth - continuationWidth pieces

float pieceWidth = maxWidth - continuationWidth;

const char *pos = currentWord;

currentWordSpace = 0;

// reset the char width function to a state where no kerning occurs (start of word)

charWidth(passthroughCW, ' ');

while(pos <= p)

{

float w = charWidth(passthroughCW, *pos);

if(currentWordSpace + w > pieceWidth) // this piece won't fit any more

{

// print everything until it

result += processLine(passthroughPL, currentWord, pos - currentWord, currentWordSpace, true);

// go to here

currentWord = pos;

currentWordSpace = 0;

}

currentWordSpace += w;

++pos;

}

// now we have a currentWord that fits... set up its next line

// currentWordSpace has been set

// currentWord has been set

spaceUsedInLine = continuationWidth;

currentLine = currentWord;

currentLineEnd = 0;

isContinuation = true;

}

else

{

// we have a guarantee that it will fix (see if clause)

result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace - w, isContinuation);

// and use the rest of this word as new start of a line

currentWordSpace = w;

currentWord = p;

spaceUsedInLine = continuationWidth;

currentLine = p;

currentLineEnd = 0;

isContinuation = true;

}

}

}

}

if(!currentWord)

{

currentWord = p;

currentWordSpace = 0;

}

if(currentLine) // Same procedure as \n

{

// Can I append the current word?

if(spaceUsedInLine + currentWordSpace <= maxWidth)

result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);

else

{

if(currentLineEnd)

{

result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);

isContinuation = true;

}

result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);

}

}

return result;

*/

}

/*

==============

COM_ParseToken_Simple

Parse a token out of a string

Writes the token and its strlen to the com_token and com_token_len globals.

==============

*/

qbool COM_ParseToken_Simple(const char **datapointer, qbool returnnewline, qbool parsebackslash, qbool parsecomments)

{

int len;

int c;

const char *data = *datapointer;

com_token_len = len = 0;

com_token[0] = '\0';

if (!data)

{

*datapointer = NULL;

return false;

}

// skip whitespace

skipwhite:

// line endings:

// UNIX: \n

// Mac: \r

// Windows: \r\n

for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)

{

if (*data == 0)

{

// end of file

*datapointer = NULL;

return false;

}

}

// handle Windows line ending

if (data[0] == '\r' && data[1] == '\n')

data++;

if (parsecomments && data[0] == '/' && data[1] == '/')

{

// comment

while (*data && *data != '\n' && *data != '\r')

data++;

goto skipwhite;

}

else if (parsecomments && data[0] == '/' && data[1] == '*')

{

// comment

data++;

while (*data && (data[0] != '*' || data[1] != '/'))

data++;

if (*data)

data++;

if (*data)

data++;

goto skipwhite;

}

else if (*data == '\"')

{

// quoted string

for (data++;*data && *data != '\"';data++)

{

c = *data;

if (*data == '\\' && parsebackslash)

{

data++;

c = *data;

if (c == 'n')

c = '\n';

else if (c == 't')

c = '\t';

}

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = c;

}

com_token[len] = '\0';

com_token_len = len;

if (*data == '\"')

data++;

*datapointer = data;

return true;

}

else if (*data == '\r')

{

// translate Mac line ending to UNIX

com_token[len++] = '\n';data++;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

else if (*data == '\n')

{

// single character

com_token[len++] = *data++;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

else

{

// regular word

for (;!ISWHITESPACE(*data);data++)

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = *data;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

}

/*

==============

COM_ParseToken_QuakeC

Parse a token out of a string

Writes the token and its strlen to the com_token and com_token_len globals.

==============

*/

qbool COM_ParseToken_QuakeC(const char **datapointer, qbool returnnewline)

{

int len;

int c;

const char *data = *datapointer;

com_token_len = len = 0;

com_token[0] = '\0';

if (!data)

{

*datapointer = NULL;

return false;

}

// skip whitespace

skipwhite:

// line endings:

// UNIX: \n

// Mac: \r

// Windows: \r\n

for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)

{

if (*data == 0)

{

// end of file

*datapointer = NULL;

return false;

}

}

// handle Windows line ending

if (data[0] == '\r' && data[1] == '\n')

data++;

if (data[0] == '/' && data[1] == '/')

{

// comment

while (*data && *data != '\n' && *data != '\r')

data++;

goto skipwhite;

}

else if (data[0] == '/' && data[1] == '*')

{

// comment

data++;

while (*data && (data[0] != '*' || data[1] != '/'))

data++;

if (*data)

data++;

if (*data)

data++;

goto skipwhite;

}

else if (*data == '\"' || *data == '\'')

{

// quoted string

char quote = *data;

for (data++;*data && *data != quote;data++)

{

c = *data;

if (*data == '\\')

{

data++;

c = *data;

if (c == 'n')

c = '\n';

else if (c == 't')

c = '\t';

}

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = c;

}

com_token[len] = '\0';

com_token_len = len;

if (*data == quote)

data++;

*datapointer = data;

return true;

}

else if (*data == '\r')

{

// translate Mac line ending to UNIX

com_token[len++] = '\n';data++;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == ':' || *data == ',' || *data == ';')

{

// single character

com_token[len++] = *data++;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

else

{

// regular word

for (;!ISWHITESPACE(*data) && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != ':' && *data != ',' && *data != ';';data++)

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = *data;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

}

/*

==============

COM_ParseToken_VM_Tokenize

Parse a token out of a string

Writes the token and its strlen to the com_token and com_token_len globals.

==============

*/

qbool COM_ParseToken_VM_Tokenize(const char **datapointer, qbool returnnewline)

{

int len;

int c;

const char *data = *datapointer;

com_token_len = len = 0;

com_token[0] = '\0';

if (!data)

{

*datapointer = NULL;

return false;

}

// skip whitespace

skipwhite:

// line endings:

// UNIX: \n

// Mac: \r

// Windows: \r\n

for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)

{

if (*data == 0)

{

// end of file

*datapointer = NULL;

return false;

}

}

// handle Windows line ending

if (data[0] == '\r' && data[1] == '\n')

data++;

if (data[0] == '/' && data[1] == '/')

{

// comment

while (*data && *data != '\n' && *data != '\r')

data++;

goto skipwhite;

}

else if (data[0] == '/' && data[1] == '*')

{

// comment

data++;

while (*data && (data[0] != '*' || data[1] != '/'))

data++;

if (*data)

data++;

if (*data)

data++;

goto skipwhite;

}

else if (*data == '\"' || *data == '\'')

{

char quote = *data;

// quoted string

for (data++;*data && *data != quote;data++)

{

c = *data;

if (*data == '\\')

{

data++;

c = *data;

if (c == 'n')

c = '\n';

else if (c == 't')

c = '\t';

}

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = c;

}

com_token[len] = '\0';

com_token_len = len;

if (*data == quote)

data++;

*datapointer = data;

return true;

}

else if (*data == '\r')

{

// translate Mac line ending to UNIX

com_token[len++] = '\n';data++;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == ':' || *data == ',' || *data == ';')

{

// single character

com_token[len++] = *data++;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

else

{

// regular word

for (;!ISWHITESPACE(*data) && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != ':' && *data != ',' && *data != ';';data++)

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = *data;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

return true;

}

}

/*

==============

COM_ParseToken_Console

Parse a token out of a string, behaving like the qwcl console

Writes the token and its strlen to the com_token and com_token_len globals.

==============

*/

qbool COM_ParseToken_Console(const char **datapointer)

{

int len;

const char *data = *datapointer;

com_token_len = len = 0;

com_token[0] = '\0';

if (!data)

{

*datapointer = NULL;

return false;

}

// skip whitespace

skipwhite:

for (;ISWHITESPACE(*data);data++)

{

if (*data == 0)

{

// end of file

*datapointer = NULL;

return false;

}

}

if (*data == '/' && data[1] == '/')

{

// comment

while (*data && *data != '\n' && *data != '\r')

data++;

goto skipwhite;

}

else if (*data == '\"')

{

// quoted string

for (data++;*data && *data != '\"';data++)

{

// allow escaped " and \ case

if (*data == '\\' && (data[1] == '\"' || data[1] == '\\'))

data++;

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = *data;

}

com_token[len] = '\0';

com_token_len = len;

if (*data == '\"')

data++;

*datapointer = data;

}

else

{

// regular word

for (;!ISWHITESPACE(*data);data++)

if (len < (int)sizeof(com_token) - 1)

com_token[len++] = *data;

com_token[len] = '\0';

com_token_len = len;

*datapointer = data;

}

return true;

}

/*

===============

Com_CalcRoll

Used by view and sv_user

===============

*/

float Com_CalcRoll (const vec3_t angles, const vec3_t velocity, const vec_t angleval, const vec_t velocityval)

{

vec3_t forward, right, up;

float sign;

float side;

AngleVectors (angles, forward, right, up);

side = DotProduct (velocity, right);

sign = side < 0 ? -1 : 1;

side = fabs(side);

if (side < velocityval)

side = side * angleval / velocityval;

else

side = angleval;

return side*sign;

}

//===========================================================================

/*

================

COM_Init

================

*/

void COM_Init_Commands (void)

{

int i, j, n;

char com_cmdline[MAX_INPUTLINE];

Cvar_RegisterVariable (&registered);

Cvar_RegisterVariable (&cmdline);

Cvar_RegisterVariable(&cl_playermodel);

Cvar_RegisterVirtual(&cl_playermodel, "_cl_playermodel");

Cvar_RegisterVariable(&cl_playerskin);

Cvar_RegisterVirtual(&cl_playerskin, "_cl_playerskin");

// reconstitute the command line for the cmdline externally visible cvar

n = 0;

for (j = 0;(j < MAX_NUM_ARGVS) && (j < sys.argc);j++)

{

i = 0;

if (strstr(sys.argv[j], " "))

{

// arg contains whitespace, store quotes around it

// This condition checks whether we can allow to put

// in two quote characters.

if (n >= ((int)sizeof(com_cmdline) - 2))

break;

com_cmdline[n++] = '\"';

// This condition checks whether we can allow one

// more character and a quote character.

while ((n < ((int)sizeof(com_cmdline) - 2)) && sys.argv[j][i])

// FIXME: Doesn't quote special characters.

com_cmdline[n++] = sys.argv[j][i++];

com_cmdline[n++] = '\"';

}

else

{

// This condition checks whether we can allow one

// more character.

while ((n < ((int)sizeof(com_cmdline) - 1)) && sys.argv[j][i])

com_cmdline[n++] = sys.argv[j][i++];

}

if (n < ((int)sizeof(com_cmdline) - 1))

com_cmdline[n++] = ' ';

else

break;

}

com_cmdline[n] = 0;

Cvar_SetQuick(&cmdline, com_cmdline);

}

/*

============

va

varargs print into provided buffer, returns buffer (so that it can be called in-line, unlike dpsnprintf)

============

*/

char *va(char *buf, size_t buflen, const char *format, ...)

{

va_list argptr;

va_start (argptr, format);

dpvsnprintf (buf, buflen, format,argptr);

va_end (argptr);

return buf;

}

//======================================

// snprintf and vsnprintf are NOT portable. Use their DP counterparts instead

#undef snprintf

#undef vsnprintf

#ifdef WIN32

# define snprintf _snprintf

# define vsnprintf _vsnprintf

#endif

int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...)

{

va_list args;

int result;