src/gmxlib/ffscanf.c

   1 /*
   2  *
   3  *                This source code is part of
   4  *
   5  *                 G   R   O   M   A   C   S
   6  *
   7  *          GROningen MAchine for Chemical Simulations
   8  *
   9  *                        VERSION 3.2.0
  10  * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
  11  * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
  12  * Copyright (c) 2001-2004, The GROMACS development team,
  13  * check out http://www.gromacs.org for more information.
  14
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * If you want to redistribute modifications, please consider that
  21  * scientific software is very special. Version control is crucial -
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  27  * To help us fund GROMACS development, we humbly ask that you cite
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  29  *
  30  * For more info, check our website at http://www.gromacs.org
  31  *
  32  * And Hey:
  33  * GROningen Mixture of Alchemy and Childrens' Stories
  34  */
  35 #ifdef HAVE_CONFIG_H
  36 #include <config.h>
  37 #endif
  38
  39 /* This file is completely threadsafe - keep it that way! */
  40
  41
  42 #include <stdarg.h>
  43 #include <ctype.h>
  44 #include "typedefs.h"
  45 #include "string2.h"
  46 #include "gmx_fatal.h"
  47 #include "ffscanf.h"
  48
  49 static int getfld(char **p)
  50 {
  51   int fld;
  52
  53   fld=0;
  54   while (isdigit(**p)) fld=(fld*10)+((*((*p)++))-'0');
  55   return fld;
  56 }
  57
  58 void ffscanf(FILE *in,char *fmt, ...)
  59 {
  60   va_list ap;
  61   char *p;
  62   char buf[STRLEN];
  63   int i,fld;
  64   double dval;
  65
  66   va_start(ap,fmt);
  67   for (p=fmt; *p; p++) {
  68     if (*p == '%') {
  69       p++;
  70       fld=getfld(&p);
  71       for(i=0; (i<fld); ) {
  72         buf[i]=fgetc(in);
  73         if (buf[i] != '\n') i++;
  74       }
  75       buf[fld]='\0';
  76       switch(*p) {
  77       case 'd':
  78         sscanf(buf,"%d",va_arg(ap,int *));
  79         break;
  80       case 'f':
  81         sscanf(buf,"%f",va_arg(ap,float *));
  82         break;
  83       case 'F':
  84         sscanf(buf,"%lf",va_arg(ap,double *));
  85         break;
  86       case 'r':
  87         sscanf(buf,"%lf",&dval);
  88         *(va_arg(ap,real *)) = dval;
  89         break;
  90       default:
  91         break;
  92       }
  93     }
  94     else
  95       gmx_fatal(FARGS,"unknown ffscanf format '%c'",*p+1);
  96   }
  97   va_end(ap);
  98 }
  99