gnu/usr.bin/groff/libXdvi/lex.c

   1 #include <X11/Xos.h>
   2 #include <X11/IntrinsicP.h>
   3 #include <X11/StringDefs.h>
   4 #include <stdio.h>
   5 #include "DviP.h"
   6
   7 DviGetAndPut(dw, cp)
   8     DviWidget   dw;
   9     int         *cp;
  10 {
  11     if (dw->dvi.ungot)
  12     {
  13         dw->dvi.ungot = 0;
  14         *cp = getc (dw->dvi.file);
  15     }
  16     else
  17     {
  18         *cp = getc (dw->dvi.file);
  19         putc (*cp, dw->dvi.tmpFile);
  20     }
  21     return *cp;
  22 }
  23
  24 char *
  25 GetLine(dw, Buffer, Length)
  26         DviWidget       dw;
  27         char    *Buffer;
  28         int     Length;
  29 {
  30         int     i = 0, c;
  31         char    *p = Buffer;
  32
  33         Length--;                           /* Save room for final NULL */
  34
  35         while (i < Length && DviGetC (dw, &c) != EOF && c != '\n')
  36                 if (p)
  37                         *p++ = c;
  38         if (c == '\n' && p)                 /* Retain the newline like fgets */
  39                 *p++ = c;
  40         if (c == '\n')
  41                 DviUngetC(dw, c);
  42         if (p)
  43                 *p = NULL;
  44         return (Buffer);
  45 }
  46
  47 char *
  48 GetWord(dw, Buffer, Length)
  49         DviWidget       dw;
  50         char    *Buffer;
  51         int     Length;
  52 {
  53         int     i = 0, c;
  54         char    *p = Buffer;
  55
  56         Length--;                           /* Save room for final NULL */
  57         while (DviGetC(dw, &c) != EOF && (c == ' ' || c == '\n'))
  58                 ;
  59         if (c != EOF)
  60                 DviUngetC(dw, c);
  61         while (i < Length && DviGetC(dw, &c) != EOF && c != ' ' && c != '\n')
  62                 if (p)
  63                         *p++ = c;
  64         if (c != EOF)
  65                 DviUngetC(dw, c);
  66         if (p)
  67                 *p = NULL;
  68         return (Buffer);
  69 }
  70
  71 GetNumber(dw)
  72         DviWidget       dw;
  73 {
  74         int     i = 0,  c;
  75         int     negative = 0;
  76
  77         while (DviGetC(dw, &c) != EOF && (c == ' ' || c == '\n'))
  78                 ;
  79         if (c != EOF)
  80                 DviUngetC(dw, c);
  81
  82         while (DviGetC(dw, &c) != EOF && c >= '0' && c <= '9') {
  83                 if (negative)
  84                         i = i*10 - (c - '0');
  85                 else
  86                         i = i*10 + c - '0';
  87         }
  88
  89         if (c != EOF)
  90                 DviUngetC(dw, c);
  91         return (i);
  92 }
  93
  94 /*
  95 Local Variables:
  96 c-indent-level: 8
  97 c-continued-statement-offset: 8
  98 c-brace-offset: -8
  99 c-argdecl-indent: 8
 100 c-label-offset: -8
 101 c-tab-always-indent: nil
 102 End:
 103 */