appl/popper/pop_parse.c

   1 /*
   2  * Copyright (c) 1989 Regents of the University of California.
   3  * All rights reserved.  The Berkeley software License Agreement
   4  * specifies the terms and conditions for redistribution.
   5  */
   6
   7 #include <popper.h>
   8 RCSID("$Id$");
   9
  10 /*
  11  *  parse:  Parse a raw input line from a POP client
  12  *  into null-delimited tokens
  13  */
  14
  15 int
  16 pop_parse(POP *p, char *buf)
  17 {
  18     char            *   mp;
  19     int        i;
  20
  21     /*  Loop through the POP command array */
  22     for (mp = buf, i = 0; ; i++) {
  23
  24         /*  Skip leading spaces and tabs in the message */
  25         while (isspace((unsigned char)*mp))mp++;
  26
  27         /*  Are we at the end of the message? */
  28         if (*mp == 0) break;
  29
  30         /*  Have we already obtained the maximum allowable parameters? */
  31         if (i >= MAXPARMCOUNT) {
  32             pop_msg(p,POP_FAILURE,"Too many arguments supplied.");
  33             return(-1);
  34         }
  35
  36         /*  Point to the start of the token */
  37         p->pop_parm[i] = mp;
  38
  39         /*  Search for the first space character (end of the token) */
  40         while (!isspace((unsigned char)*mp) && *mp) mp++;
  41
  42         /*  Delimit the token with a null */
  43         if (*mp) *mp++ = 0;
  44     }
  45
  46     /*  Were any parameters passed at all? */
  47     if (i == 0) return (-1);
  48
  49     /*  Convert the first token (POP command) to lower case */
  50     strlwr(p->pop_command);
  51
  52     /*  Return the number of tokens extracted minus the command itself */
  53     return (i-1);
  54
  55 }