source: buchla-68k/orig/GP/RDLINE.C

/*
   =============================================================================
        rdline.c -- read a line into a buffer
        Version 1 -- 1988-12-29 -- D.N. Lynx Crowe
   =============================================================================
*/

#include "stdio.h"
#include "stddefs.h"

/*
   =============================================================================
        rdline(fp, buf, maxc) -- read a line from a file into a buffer

        fp      FILE pointer
        buf     buffer pointer
        maxc    maximum line length  (not counting the terminating zero)

        The buffer must have room for maxc + 1 bytes.  The final byte will be
        a terminating zero.

        returns:
                         0      success         line read - complete with LF
                        -1      failure         immediate EOF - no data read
                         1      failure         read to EOF - missing LF at end
                         2      failure         buffer full - missing LF at end
   =============================================================================
*/

short
rdline(fp, buf, maxc)
register FILE *fp;
register char *buf;
register short maxc;
{
        register short c, i;

        *buf = '\0';

        for (i = 0; i < maxc; i++) {

                if (EOF EQ (c = fgetc(fp)))
                        return(i ? 1 : -1);

                *buf++ = c;
                *buf   = '\0';

                if (c EQ '\n')
                        return(0);
        }

        return(2);
}