/* $Id: charsets.h,v 1.26 2005/07/15 20:17:25 miciah Exp $ */

#ifndef EL__INTL_CHARSETS_H
#define EL__INTL_CHARSETS_H

typedef uint32_t unicode_val_T;

/* UCS/Unicode replacement character. */
#define UCS_NO_CHAR ((unicode_val_T) 0xFFFD)

/*   replacement character. See u2cp(). */
#define NBSP_CHAR ((unsigned char) 1)
#define NBSP_CHAR_STRING "\001"

struct conv_table {
	int t;
	union {
		unsigned char *str;
		struct conv_table *tbl;
	} u;
};

enum convert_string_mode {
	CSM_DEFAULT, /* Convert any char. */
	CSM_QUERY, /* Special handling of '&' and '=' chars. */
	CSM_FORM, /* Special handling of '&' and '=' chars in forms. */
	CSM_NONE, /* Convert nothing. */
};

struct conv_table *get_translation_table(int, int);
unsigned char *get_entity_string(const unsigned char *str, const int strlen, int encoding);

/* The convert_string() name is also used by Samba (version 3.0.3), which
 * provides libnss_wins.so.2, which is called somewhere inside
 * _nss_wins_gethostbyname_r(). This name clash causes the elinks hostname
 * lookup thread to crash so we need to rename the symbol. */
/* Reported by Derek Poon and filed as bug 453 */
#undef convert_string
#define convert_string convert_string_elinks

/* This routine converts a string from one charset to another according to the
 * passed @convert_table, potentially also decoding SGML (HTML) entities along
 * the way (according to @mode). It either returns dynamically allocated
 * converted string of length @length, or if the @callback is non-NULL it calls
 * it each few bytes instead and always returns NULL (@length is undefined).
 * Note that it's ok not to care and pass NULL as @length. */
unsigned char *convert_string(struct conv_table *convert_table,
			      unsigned char *chars, int charslen, int cp,
			      enum convert_string_mode mode, int *length,
			      void (*callback)(void *data, unsigned char *buf, int buflen),
			      void *callback_data);

int get_cp_index(unsigned char *);
unsigned char *get_cp_name(int);
unsigned char *get_cp_mime_name(int);
int is_cp_special(int);
void free_conv_table(void);
unsigned char *cp2utf_8(int, int);

unsigned char *u2cp_(unicode_val_T, int, int no_nbsp_hack);
#define u2cp(u, to) u2cp_(u, to, 0)
#define u2cp_no_nbsp(u, to) u2cp_(u, to, 1)

void init_charsets_lookup(void);
void free_charsets_lookup(void);

#endif