--- a/src/stringref.h Sat Aug 19 00:24:14 2006 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,146 +0,0 @@ -/** - * @file stringref.h Reference-counted immutable strings - * @ingroup core - * - * gaim - * - * Gaim is the legal property of its developers, whose names are too numerous - * to list here. Please refer to the COPYRIGHT file distributed with this - * source distribution. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ -#ifndef _GAIM_STRINGREF_H_ -#define _GAIM_STRINGREF_H_ - -/** - * The internal representation of a stringref. - * - * @note For this structure to be useful, the string contained within - * it must be immutable -- for this reason, do _not_ access it - * directly! - */ -typedef struct _GaimStringref { - guint32 ref; /**< The reference count of this string. - * Note that reference counts are only - * 31 bits, and the high-order bit - * indicates whether this string is up - * for GC at the next idle handler... - * But you aren't going to touch this - * anyway, right? */ - char value[1]; /**< The string contained in this ref. - * Notice that it is simply "hanging - * off the end" of the ref ... this - * is to save an allocation. */ -} GaimStringref; - -/** - * Creates an immutable reference-counted string object. The newly - * created object will have a reference count of 1. - * - * @param value This will be the value of the string; it will be - * duplicated. - * - * @return A newly allocated string reference object with a refcount - * of 1. - */ -GaimStringref *gaim_stringref_new(const char *value); - -/** - * Creates an immutable reference-counted string object. The newly - * created object will have a reference count of zero, and if it is - * not referenced before the next iteration of the mainloop it will - * be freed at that time. - * - * @param value This will be the value of the string; it will be - * duplicated. - * - * @return A newly allocated string reference object with a refcount - * of zero. - */ -GaimStringref *gaim_stringref_new_noref(const char *value); - -/** - * Creates an immutable reference-counted string object from a printf - * format specification and arguments. The created object will have a - * reference count of 1. - * - * @param format A printf-style format specification. - * - * @return A newly allocated string reference object with a refcount - * of 1. - */ -GaimStringref *gaim_stringref_printf(const char *format, ...); - -/** - * Increase the reference count of the given stringref. - * - * @param stringref String to be referenced. - * - * @return A pointer to the referenced string. - */ -GaimStringref *gaim_stringref_ref(GaimStringref *stringref); - -/** - * Decrease the reference count of the given stringref. If this - * reference count reaches zero, the stringref will be freed; thus - * you MUST NOT use this string after dereferencing it. - * - * @param stringref String to be dereferenced. - */ -void gaim_stringref_unref(GaimStringref *stringref); - -/** - * Retrieve the value of a stringref. - * - * @note This value should not be cached or stored in a local variable. - * While there is nothing inherently incorrect about doing so, it - * is easy to forget that the cached value is in fact a - * reference-counted object and accidentally use it after - * dereferencing. This is more problematic for a reference- - * counted object than a heap-allocated object, as it may seem to - * be valid or invalid nondeterministically based on how many - * other references to it exist. - * - * @param stringref String reference from which to retrieve the value. - * - * @return The contents of the string reference. - */ -const char *gaim_stringref_value(const GaimStringref *stringref); - -/** - * Compare two stringrefs for string equality. This returns the same - * value as strcmp would, where <0 indicates that s1 is "less than" s2 - * in the ASCII lexicography, 0 indicates equality, etc. - * - * @param s1 The reference string. - * - * @param s2 The string to compare against the reference. - * - * @return An ordering indication on s1 and s2. - */ -int gaim_stringref_cmp(const GaimStringref *s1, const GaimStringref *s2); - -/** - * Find the length of the string inside a stringref. - * - * @param stringref The string in whose length we are interested. - * - * @return The length of the string in stringref - */ -size_t gaim_stringref_len(const GaimStringref *stringref); - -#endif /* _GAIM_STRINGREF_H_ */