BSD 4_1_snap release

[unix-history] / usr / src / cmd / pc0 / subr.c

/* Copyright (c) 1979 Regents of the University of California */

static  char sccsid[] = "@(#)subr.c 1.4 11/24/80";

#include "whoami.h"
#include "0.h"

#ifndef PI1
/*
* Does the string fp end in '.' and the character c ?
*/
dotted(fp, c)
       register char *fp;
       char c;
{
       register int i;

       i = strlen(fp);
       return (i > 1 && fp[i - 2] == '.' && fp[i - 1] == c);
}

/*
* Toggle the option c.
*/
togopt(c)
       char c;
{
       register char *tp;

       tp = &opt( c );
       *tp = 1 - *tp;
}

/*
* Set the time vector "tvec" to the
* modification time stamp of a file.
*/
gettime( filename )
   char *filename;
{
#include <sys/stat.h>
       struct stat stb;

       stat(filename, &stb);
       tvec = stb.st_mtime;
}

/*
* Convert a "ctime" into a Pascal styple time line
*/
char *
myctime(tv)
       int *tv;
{
       register char *cp, *dp;
       char *cpp;
       register i;
       static char mycbuf[26];

       cpp = ctime(tv);
       dp = mycbuf;
       cp = cpp;
       cpp[16] = 0;
       while (*dp++ = *cp++);
       dp--;
       cp = cpp+19;
       cpp[24] = 0;
       while (*dp++ = *cp++);
       return (mycbuf);
}

/*
* Is "fp" in the command line list of names ?
*/
inpflist(fp)
       char *fp;
{
       register i, *pfp;

       pfp = pflist;
       for (i = pflstc; i > 0; i--)
               if (strcmp(fp, *pfp++) == 0)
                       return (1);
       return (0);
}
#endif

extern  int errno;
extern  char *sys_errlist[];

/*
* Boom!
*/
Perror(file, error)
       char *file, *error;
{

       fprintf( stderr , "%s: %s\n" , file , error );
}

int *
calloc(num, size)
       int num, size;
{
       register int p1, *p2, nbyte;

       nbyte = (num*size+( ( sizeof ( int ) ) - 1 ) ) & ~( ( sizeof ( int ) ) - 1 );
       if ((p1 = malloc(nbyte)) == 0)
               return (0);
       p2 = p1;
       nbyte /= sizeof ( int );
       do {
               *p2++ = 0;
       } while (--nbyte);
       return (p1);
}

/*
* Compare strings:  s1>s2: >0  s1==s2: 0  s1<s2: <0
*/
strcmp(s1, s2)
       register char *s1, *s2;
{

       while (*s1 == *s2++)
               if (*s1++=='\0')
                       return (0);
       return (*s1 - *--s2);
}

/*
* Copy string s2 to s1.
* S1 must be large enough.
* Return s1.
*/
strcpy(s1, s2)
       register char *s1, *s2;
{
       register os1;

       os1 = s1;
       while (*s1++ = *s2++)
               continue;
       return (os1);
}

/*
* Strlen is currently a freebie of perror
* Take the length of a string.
* Note that this does not include the trailing null!
strlen(cp)
       register char *cp;
{
       register int i;

       for (i = 0; *cp != 0; cp++)
               i++;
       return (i);
}
*/
copy(to, from, bytes)
       register char *to, *from;
       register int bytes;
{

       if (bytes != 0)
               do
                       *to++ = *from++;
               while (--bytes);
}

/*
* Is ch one of the characters in the string cp ?
*/
any(cp, ch)
       register char *cp;
       char ch;
{

       while (*cp)
               if (*cp++ == ch)
                       return (1);
       return (0);
}

opush(c)
       register CHAR c;
{

       c -= 'A';
       optstk[c] <<= 1;
       optstk[c] |= opts[c];
       opts[c] = 1;
#ifdef PI0
       send(ROPUSH, c);
#endif
}

opop(c)
       register CHAR c;
{

       c -= 'A';
       opts[c] = optstk[c] & 1;
       optstk[c] >>= 1;
#ifdef PI0
       send(ROPOP, c);
#endif
}