heimdal/appl/popper/pop_dropinfo.c

/*
 * Copyright (c) 1989 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#include <popper.h>
RCSID("$Id$");

#ifdef UIDL

/*
 * Copy the string found after after : into a malloced buffer. Stop
 * copying at end of string or end of line. End of line delimiter is
 * not part of the resulting copy.
 */
static
char *
find_value_after_colon(char *p)
{
  char *t, *tmp;

  for (; *p != 0 && *p != ':'; p++) /* Find : */
    ;

  if (*p == 0)
    goto error;

  p++;				/* Skip over : */

  for(; *p == ' ' || *p == '\t'; p++) /* Remove white space */
    ;

  for (t = p; *t != 0 && *t != '\n' && *t != '\r'; t++)	/* Find end of str */
    ;

  tmp = t = malloc(t - p + 1);
  if (tmp == 0)
    goto error;

  for (; *p != 0 && *p != '\n' && *p != '\r'; p++, t++)	/* Copy characters */
    *t = *p;
  *t = 0;			/* Terminate string */
  return tmp;

error:
  return "ErrorUIDL";
}
#endif

/* 
 *  dropinfo:   Extract information about the POP maildrop and store 
 *  it for use by the other POP routines.
 */

int
pop_dropinfo(POP *p)
{
    char                    buffer[BUFSIZ];         /*  Read buffer */
    MsgInfoList         *   mp;                     /*  Pointer to message 
                                                        info list */
    int			    msg_num;                /*  Current message 
                                                        counter */
    int                     nchar;                  /*  Bytes written/read */
#ifdef UIDL
    /* msg_idp points to the current Message-Id to be filled in. The
     * pointer is moved every time we find a From line and we fill in
     * msg_id whenever we encounter the corresponding Message-Id or
     * X-UIDL line. */
    char *_sentinel = 0;
    char **msg_idp = &_sentinel;
#endif
    
    /*  Initialize maildrop status variables in the POP parameter block */
    p->msg_count = 0;
    p->msgs_deleted = 0;
    p->last_msg = 0;
    p->bytes_deleted = 0;
    p->drop_size = 0;

    /*  Allocate memory for message information structures */
    p->msg_count = ALLOC_MSGS;
    p->mlp = (MsgInfoList *)calloc((unsigned)p->msg_count,sizeof(MsgInfoList));
    if (p->mlp == NULL){
        fclose (p->drop);
        p->msg_count = 0;
        return pop_msg (p,POP_FAILURE,
            "Can't build message list for '%s': Out of memory", p->user);
    }

    rewind (p->drop);

    /*  Scan the file, loading the message information list with 
        information about each message */

    for (msg_num = p->drop_size = 0, mp = p->mlp - 1;
             fgets(buffer,MAXMSGLINELEN,p->drop);) {

        nchar  = strlen(buffer);

        if (strncmp(buffer,"From ",5) == 0) {

            if (++msg_num > p->msg_count) {
                p->mlp=(MsgInfoList *) realloc(p->mlp,
                    (p->msg_count+=ALLOC_MSGS)*sizeof(MsgInfoList));
                if (p->mlp == NULL){
                    fclose (p->drop);
                    p->msg_count = 0;
                    return pop_msg (p,POP_FAILURE,
                        "Can't build message list for '%s': Out of memory",
                            p->user);
                }
                mp = p->mlp + msg_num - 2;
            }
            ++mp;
            mp->number = msg_num;
            mp->length = 0;
            mp->lines = 0;
            mp->offset = ftell(p->drop) - nchar;
            mp->del_flag = FALSE;
            mp->retr_flag = FALSE;
#ifdef UIDL
	    mp->msg_id = 0;
	    msg_idp = &mp->msg_id;
#endif
#ifdef DEBUG
            if(p->debug)
                pop_log(p, POP_DEBUG,
			"Msg %d at offset %u being added to list",
			mp->number, mp->offset);
#endif /* DEBUG */
        }
#ifdef UIDL
	else if (strncasecmp("Message-Id:",buffer, 11) == 0) {
	  if (mp->msg_id == 0)
	    *msg_idp = find_value_after_colon(buffer);
	} else if (strncasecmp(buffer, "X-UIDL:", 7) == 0) {
	  /* Courtesy to Qualcomm, there is really no such thing as X-UIDL */
	  *msg_idp = find_value_after_colon(buffer);
	}
#endif
        mp->length += nchar;
        p->drop_size += nchar;
        mp->lines++;
    }
    p->msg_count = msg_num;

#ifdef DEBUG
    if(p->debug && msg_num > 0) {
        int i;
        for (i = 0, mp = p->mlp; i < p->msg_count; i++, mp++)
#ifdef UIDL
            pop_log(p,POP_DEBUG,
                "Msg %d at offset %d is %d octets long and has %u lines and id %s.",
                    mp->number,mp->offset,mp->length,mp->lines, mp->msg_id);
#else	
            pop_log(p,POP_DEBUG,
                "Msg %d at offset %d is %d octets long and has %u lines.",
                    mp->number,mp->offset,mp->length,mp->lines);
#endif
    }
#endif /* DEBUG */

    return(POP_SUCCESS);
}