src/devices/xditview/lex.c

   1 #include <X11/Xos.h>
   2 #include <X11/IntrinsicP.h>
   3 #include <X11/StringDefs.h>
   4 #include <stdio.h>
   5
   6 #include "DviP.h"
   7 #include "lex.h"
   8
   9 int
  10 DviGetAndPut(DviWidget dw, 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(DviWidget dw, char *Buffer, int Length)
  26 {
  27         int     i = 0, c;
  28
  29         Length--;                    /* Save room for final '\0' */
  30
  31         while (DviGetC (dw, &c) != EOF) {
  32                 if (Buffer && i < Length)
  33                         Buffer[i++] = c;
  34                 if (c == '\n') {
  35                         DviUngetC(dw, c);
  36                         break;
  37                 }
  38         }
  39         if (Buffer)
  40                 Buffer[i] = '\0';
  41         return Buffer;
  42 }
  43
  44 char *
  45 GetWord(DviWidget dw, char *Buffer, int Length)
  46 {
  47         int     i = 0, c;
  48
  49         Length--;                           /* Save room for final '\0' */
  50         while (DviGetC(dw, &c) == ' ' || c == '\n')
  51                 ;
  52         while (c != EOF) {
  53                 if (Buffer && i < Length)
  54                         Buffer[i++] = c;
  55                 if (DviGetC(dw, &c) == ' ' || c == '\n') {
  56                         DviUngetC(dw, c);
  57                         break;
  58                 }
  59         }
  60         if (Buffer)
  61                 Buffer[i] = '\0';
  62         return Buffer;
  63 }
  64
  65 int
  66 GetNumber(DviWidget dw)
  67 {
  68         int     i = 0,  c;
  69         int     negative = 0;
  70
  71         while (DviGetC(dw, &c) == ' ' || c == '\n')
  72                 ;
  73         if (c == '-') {
  74                 negative = 1;
  75                 DviGetC(dw, &c);
  76         }
  77
  78         for (; c >= '0' && c <= '9'; DviGetC(dw, &c)) {
  79                 if (negative)
  80                         i = i*10 - (c - '0');
  81                 else
  82                         i = i*10 + c - '0';
  83         }
  84         if (c != EOF)
  85                 DviUngetC(dw, c);
  86         return i;
  87 }
  88
  89 /*
  90 Local Variables:
  91 c-indent-level: 8
  92 c-continued-statement-offset: 8
  93 c-brace-offset: -8
  94 c-argdecl-indent: 8
  95 c-label-offset: -8
  96 c-tab-always-indent: nil
  97 End:
  98 */