BSD 2 development

[unix-history] / .ref-BSD-1 / ex-1.1 / ex_subr.c

#
/*
* Ex - a text editor
* Bill Joy UCB September 1977
*/

#include "ex.h"

skipwh()
{
       register int wh;

       wh = 0;
       while (white(peekchar())) {
               wh++;
               getchar();
       }
       return (wh);
}


strcmp(left, right)
       register char *left, *right;
{

       while (*left == *right++)
               if (*left++ == 0)
                       return (0);
       return (*left - *--right);
}

letter(c)
       register int c;
{

       if (c >= 'a' && c <= 'z')
               return (c);
       if (c >= 'A' && c <= 'Z')
               return (c + 'a' - 'A');
       return (0);
}

strlen(cp)
       register char *cp;
{
       register int i;

       i = 0;
       while (*cp++)
               i++;
       return (i);
}

white(c)
       char c;
{

       return (c == ' ' || c == '\t');
}

digit(c)
       char c;
{
       return (c >= '0' && c <= '9');
}

ucletter(c)
       char c;
{
       return (c >= 'A' && c <= 'Z');
}