contrib/groff/src/xditview/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                 dw->dvi.ungot = 0;
  13                 *cp = getc (dw->dvi.file);
  14         }
  15         else {
  16                 *cp = getc (dw->dvi.file);
  17                 if (*cp != EOF)
  18                         putc (*cp, dw->dvi.tmpFile);
  19         }
  20         return *cp;
  21 }
  22
  23 char *
  24 GetLine(dw, Buffer, Length)
  25         DviWidget       dw;
  26         char    *Buffer;
  27         int     Length;
  28 {
  29         int     i = 0, c;
  30
  31         Length--;                    /* Save room for final '\0' */
  32
  33         while (DviGetC (dw, &c) != EOF) {
  34                 if (Buffer && i < Length)
  35                         Buffer[i++] = c;
  36                 if (c == '\n') {
  37                         DviUngetC(dw, c);
  38                         break;
  39                 }
  40         }
  41         if (Buffer)
  42                 Buffer[i] = '\0';
  43         return Buffer;
  44 }
  45
  46 char *
  47 GetWord(dw, Buffer, Length)
  48         DviWidget       dw;
  49         char    *Buffer;
  50         int     Length;
  51 {
  52         int     i = 0, c;
  53
  54         Length--;                           /* Save room for final '\0' */
  55         while (DviGetC(dw, &c) == ' ' || c == '\n')
  56                 ;
  57         while (c != EOF) {
  58                 if (Buffer && i < Length)
  59                         Buffer[i++] = c;
  60                 if (DviGetC(dw, &c) == ' ' || c == '\n') {
  61                         DviUngetC(dw, c);
  62                         break;
  63                 }
  64         }
  65         if (Buffer)
  66                 Buffer[i] = '\0';
  67         return Buffer;
  68 }
  69
  70 GetNumber(dw)
  71         DviWidget       dw;
  72 {
  73         int     i = 0,  c;
  74         int     negative = 0;
  75
  76         while (DviGetC(dw, &c) == ' ' || c == '\n')
  77                 ;
  78         if (c == '-') {
  79                 negative = 1;
  80                 DviGetC(dw, &c);
  81         }
  82
  83         for (; c >= '0' && c <= '9'; DviGetC(dw, &c)) {
  84                 if (negative)
  85                         i = i*10 - (c - '0');
  86                 else
  87                         i = i*10 + c - '0';
  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 */