contrib/groff-1.19/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 int
   8 DviGetAndPut(dw, cp)
   9     DviWidget   dw;
  10     int         *cp;
  11 {
  12         if (dw->dvi.ungot) {
  13                 dw->dvi.ungot = 0;
  14                 *cp = getc (dw->dvi.file);
  15         }
  16         else {
  17                 *cp = getc (dw->dvi.file);
  18                 if (*cp != EOF)
  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
  32         Length--;                    /* Save room for final '\0' */
  33
  34         while (DviGetC (dw, &c) != EOF) {
  35                 if (Buffer && i < Length)
  36                         Buffer[i++] = c;
  37                 if (c == '\n') {
  38                         DviUngetC(dw, c);
  39                         break;
  40                 }
  41         }
  42         if (Buffer)
  43                 Buffer[i] = '\0';
  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
  55         Length--;                           /* Save room for final '\0' */
  56         while (DviGetC(dw, &c) == ' ' || c == '\n')
  57                 ;
  58         while (c != EOF) {
  59                 if (Buffer && i < Length)
  60                         Buffer[i++] = c;
  61                 if (DviGetC(dw, &c) == ' ' || c == '\n') {
  62                         DviUngetC(dw, c);
  63                         break;
  64                 }
  65         }
  66         if (Buffer)
  67                 Buffer[i] = '\0';
  68         return Buffer;
  69 }
  70
  71 int
  72 GetNumber(dw)
  73         DviWidget       dw;
  74 {
  75         int     i = 0,  c;
  76         int     negative = 0;
  77
  78         while (DviGetC(dw, &c) == ' ' || c == '\n')
  79                 ;
  80         if (c == '-') {
  81                 negative = 1;
  82                 DviGetC(dw, &c);
  83         }
  84
  85         for (; c >= '0' && c <= '9'; DviGetC(dw, &c)) {
  86                 if (negative)
  87                         i = i*10 - (c - '0');
  88                 else
  89                         i = i*10 + c - '0';
  90         }
  91         if (c != EOF)
  92                 DviUngetC(dw, c);
  93         return i;
  94 }
  95
  96 /*
  97 Local Variables:
  98 c-indent-level: 8
  99 c-continued-statement-offset: 8
 100 c-brace-offset: -8
 101 c-argdecl-indent: 8
 102 c-label-offset: -8
 103 c-tab-always-indent: nil
 104 End:
 105 */