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/* papersiz.c */
/************************************************************************
Part of the dvipng distribution
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program. If not, see
<http://www.gnu.org/licenses/>.
Copyright (C) 2002-2010 Jan-Åke Larsson
************************************************************************/
#include "dvipng.h"
const char *lengthnames[]={ "sp", "pt", "bp",
"dd", "mm", "pc",
"cc", "cm", "in" };
const int32_t lengthsp[]={ 1L, 65536L, 65782L,
70124L, 186468L, 786432L,
841489L, 1864680L, 4736286L };
/*
* Convert a double[unit], e.g., "3.2cm" or "1.0in" into length in pixels.
* Advance the passed pointer as well.
*/
static int32_t myatodim(const char ** p)
{
double tmp; /* double accuracy is enough, I think */
int i=0;
char *q;
tmp = strtod(*p,&q);
while (*q == ' ')
q++;
while (i<8 && (q[0]!=lengthnames[i][0] || q[1]!=lengthnames[i][1]))
i++;
if (i==8 && (q[0]!=lengthnames[i][0] || q[1]!=lengthnames[i][1]))
Warning("unrecognized length unit \"%.2s\", assuming inches",q);
while (*q != ',' && *q !='\0')
q++;
tmp = tmp*lengthsp[i]*dpi/4736286L; /* sp * dots/in / (sp/in), convert sp to pixels */
*p=q;
return((int32_t) tmp);
}
/*
* The routine where we handle the paper size special. We need to pass in
* the string after the `papersize=' specification.
*/
void handlepapersize(const char * p, int32_t * x, int32_t * y)
{
while (*p == ' ')
p++ ;
*x = myatodim(&p) ;
while (*p == ' ' || *p == ',')
p++ ;
*y = myatodim(&p) ;
}
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