static char rcsid[] = "@(#)$Id: header_cmp.c,v 1.3 2006/04/09 07:37:08 hurtta Exp $";

/******************************************************************************
 *  The Elm (ME+) Mail System  -  $Revision: 1.3 $   $State: Exp $
 *
 *  Modified by: Kari Hurtta <hurtta+elm@posti.FMI.FI> 
 *                           (was hurtta+elm@ozone.FMI.FI)
 ******************************************************************************
 *  The Elm Mail System 
 *
 *			Copyright (c) 1988-1992 USENET Community Trust
 *			Copyright (c) 1986,1987 Dave Taylor
 *****************************************************************************/

/** 
	compare a header, ignoring case and allowing linear white space
	around the :.  Header must be anchored to the start of the line.

	returns NULL if no match, or first character after trailing linear
	white space of the :.

**/

#include "def_mbox.h"

char * header_cmp(header, prefix, suffix)
     char *header, *prefix, *suffix;
{
	int len;

	len = strlen(prefix);
	if (strincmp(header, prefix, len))
		return(NULL);

	/* skip over while space if any */
	header += len;

	if (*header != ':')	/* headers must end in a : */
		return(NULL);

	/* skip over while space if any */
	header++;

	while (*header) {
		if (!whitespace(*header))
			break;
		header++;
	}

	if (suffix != NULL) {
		len = strlen(suffix);
		if (len > 0)
			if (strincmp(header, suffix, len))
				return(NULL);
	}

	return(header);
}

/*
 * Local Variables:
 *  mode:c
 *  c-basic-offset:4
 *  buffer-file-coding-system: iso-8859-1
 * End:
 */