#ifndef ZOIDBERG_GARGOYLE_MAIL_UTIL_H
#define ZOIDBERG_GARGOYLE_MAIL_UTIL_H
/* mail util - header parsing
**
** Copyright 2001-2003 Dr. Zoidberg Enterprises. All rights reserved.
*/


#include <stdio.h>

class BString;

// The next couple of functions are our wrapper around convert_to_utf8 and
// convert_from_utf8 so that they can also convert from UTF-8 to UTF-8 by
// specifying the MDR_UTF8_CONVERSION constant as the conversion operation.

status_t mail_convert_to_utf8(uint32 srcEncoding, const char *src,
	int32 *srcLen, char *dst, int32 *dstLen, int32 *state,
	char substitute = B_SUBSTITUTE);

status_t mail_convert_from_utf8(uint32 dstEncoding, const char *src,
	int32 *srcLen, char *dst, int32 *dstLen, int32 *state,
	char substitute = B_SUBSTITUTE);


void trim_white_space(BString &string);
// Remove leading and trailing white space from the string.

void SubjectToThread(BString &string);
// Convert a subject to the core words (remove the extraneous RE: re: etc).

time_t ParseDateWithTimeZone(const char *DateString);
// Converts a date to a time.  Handles time zones too, unlike parsedate.

ssize_t rfc2047_to_utf8(char **buffer, size_t *bufLen, size_t strLen = 0);
ssize_t utf8_to_rfc2047(char **bufp, ssize_t length,uint32 charset, char encoding);
// convert (in place) RFC 2047-style escape sequences ("=?...?.?...?=")
// in the first strLen characters of *buffer into UTF-8, and return the
// length of the converted string or an error code less than 0 on error.
//
// This may cause the string to grow.  If it grows bigger than *bufLen,
// *buffer will be reallocated using realloc(), and its new length stored
// in *bufLen.
//
// Unidentified charsets and conversion errors cause
// the offending text to be skipped.

void FoldLineAtWhiteSpaceAndAddCRLF (BString &string);
// Insert CRLF at various spots in the given string (before white space) so
// that the line length is mostly under 78 bytes.  Also makes sure there is a
// CRLF at the very end.

ssize_t nextfoldedline(const char** header, char **buffer, size_t *buflen);
ssize_t readfoldedline(FILE *file, char **buffer, size_t *buflen);
ssize_t readfoldedline(BPositionIO &in, char **buffer, size_t *buflen);
// Return in *buffer a \n-terminated line (even if the original is \r\n
// terminated or not terminated at all (last line in file situation)) from a
// memory buffer, FILE* or BPositionIO, after folding \r?\n(\s)->$1.  Return
// the length of the folded string directly, or a negative error code if there
// was a memory allocation error or file read error.  It will return zero only
// when trying to read at end of file.  *header, *file and &in are left
// pointing to the first character after the line read.
//
// if buffer is not NULL return a pointer to the buffer in *buffer
// if *buffer is not NULL, use the preallocated buffer, though it may get
// realloc'd (so use malloc to allocate it and expect to have your *buffer
// pointer modified to point to the new buffer if a realloc happens).
// if buflen is not NULL, return the final size of the buffer in buflen
// if buffer is not NULL, buflen is not NULL, and *buffer is not NULL
//   *buffer is a buffer of size *buflen
// if buffer is NULL or *buffer is NULL, and buflen is not NULL then
//   start with a buffer of size *buflen

status_t parse_header(BMessage &headers, BPositionIO &input);

void extract_address(BString &address);
	// retrieves the mail address only from an address header formatted field

void extract_address_name(BString &address);
	// Given a header field (usually the From: e-mail address) with gobbledygook in
	// it, find the longest human-readable phrase (usually the person's name).

void get_address_list(BList &list, const char *string, void (*cleanupFunc)(BString &) = NULL);

#endif	/* ZOIDBERG_GARGOYLE_MAIL_UTIL_H */