X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fident%2Fident.c;h=bb2e4ea427823d18b492fefc047955a7f38a38b8;hb=bf9be89cbbf5d6ca1b80fd5736b80f47c1a14e90;hp=56d455e9cfcbf2fb3788e7ea6899e7c71c9ba9c6;hpb=a7a54b4eb512dcc5e0be95fcb5ca95e4e2e893a9;p=libfirm diff --git a/ir/ident/ident.c b/ir/ident/ident.c index 56d455e9c..bb2e4ea42 100644 --- a/ir/ident/ident.c +++ b/ir/ident/ident.c @@ -1,107 +1,220 @@ -/* Ident --- unique handles for identifiers - Copyright (C) 1995, 1996 Markus Armbruster - All rights reserved. */ - -/* $Id$ */ - -#ifdef HAVE_CONFIG_H -# include -#endif +/* + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. + * + * This file is part of libFirm. + * + * This file may be distributed and/or modified under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation and appearing in the file LICENSE.GPL included in the + * packaging of this file. + * + * Licensees holding valid libFirm Professional Edition licenses may use + * this file in accordance with the libFirm Commercial License. + * Agreement provided with the Software. + * + * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE + * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. + */ + +/** + * @file + * @brief Hash table to store names. + * @author Goetz Lindenmaier + * @version $Id$ + */ +#include "config.h" #include #include +#include #include #include #include #include "ident_t.h" -#include "array.h" -#include "tune.h" -#include "misc.h" #include "set.h" +#include "xmalloc.h" + +/* for debugging only, not the real implementation */ +struct _ident { + char reserved[sizeof(unsigned) + sizeof(size_t)]; + char data[1]; +}; + +/** The current ident module implementation. */ +static ident_if_t impl; + +/** + * Stores a string in the ident module and returns a handle for the string. + * + * @param handle the handle for the set + * @param str the string which shall be stored + * @param len length of str in bytes + * + * @return id - a handle for the generated ident + * + * Default implementation using libfirm sets. + */ +static ident *set_new_id_from_chars(void *handle, const char *str, int len) +{ + set *id_set = handle; + + return (ident *)set_hinsert0(id_set, str, len, ID_HASH(unsigned char, str, len)); +} + +/** + * Stores a string in the ident module and returns a handle for the string. + * + * @param handle the handle for the set + * @param str the string (or whatever) which shall be stored + * + * Default implementation using libfirm sets. + */ +static ident *set_new_id_from_str(void *handle, const char *str) +{ + assert(str); + return set_new_id_from_chars(handle, str, strlen(str)); +} + +/** + * Returns a string represented by an ident. + * + * @param handle the handle for the set + * @param id the ident + * + * Default implementation using libfirm sets. + */ +static const char *set_get_id_str(void *handle, ident *id) +{ + struct set_entry *entry = (struct set_entry *)id; + (void) handle; -#define ID_TO_STR(id) ((const char *)&(id)->dptr[0]) -#define ID_TO_STRLEN(id) ((id)->size) -#define ID_TO_HASH(id) ((long)(id) + (id)->hash) + return (const char *)entry->dptr; +} -/* Vormals Debugunterstuetzung, entfernt (debug.h). */ -# define ID_VRFY(id) ((void)0) -# define IDS_VRFY(id) ((void)0) +/** + * Returns the length of the string represented by an ident. + * + * @param handle the handle for the set + * @param id the ident + * + * Default implementation using libfirm sets. + */ +static int set_get_id_strlen(void *handle, ident *id) +{ + struct set_entry *entry = (struct set_entry *)id; + (void) handle; -#ifdef STATS -# define id_stats() set_stats (id_set) -#else -# define id_stats() ((void)0) -#endif + return entry->size; +} +/** + * Default implementation using libfirm sets. + */ +void set_finish_ident(void *handle) +{ + set *id_set = handle; -static set *id_set; + del_set(id_set); +} -void id_init(void) +/** + * Default implementation if no new_id_from_str() is provided. + */ +static ident *def_new_id_from_str(void *handle, const char *str) { - id_set = new_set(memcmp, TUNE_NIDENTS); + return impl.new_id_from_chars(handle, str, strlen(str)); } -INLINE ident *id_from_str (const char *str, int len) +/** + * Default implementation if no get_id_strlen() is provided. + */ +static int def_get_id_strlen(void *handle, ident *id) { - assert(len > 0); - return set_hinsert0(id_set, str, len, ID_HASH(str, len)); + return strlen(impl.get_id_str(handle, id)); +} + +/* Initialize the ident module. */ +void init_ident(ident_if_t *id_if, int initial_n_idents) +{ + if (id_if) { + memcpy(&impl, id_if, sizeof(impl)); + + if (! impl.new_id_from_str) + impl.new_id_from_str = def_new_id_from_str; + if (! impl.get_id_strlen) + impl.get_id_strlen = def_get_id_strlen; + } else { + impl.new_id_from_str = set_new_id_from_str; + impl.new_id_from_chars = set_new_id_from_chars; + impl.get_id_str = set_get_id_str; + impl.get_id_strlen = set_get_id_strlen; + impl.finish_ident = set_finish_ident; + + /* it's ok to use memcmp here, we check only strings */ + impl.handle = new_set(memcmp, initial_n_idents); + } } ident *new_id_from_str(const char *str) { - assert(str); - return id_from_str(str, strlen(str)); + assert(str != NULL); + return impl.new_id_from_str(impl.handle, str); } -INLINE const char *id_to_str(ident *id) +ident *new_id_from_chars(const char *str, int len) { - return (const char *)id->dptr; + return impl.new_id_from_chars(impl.handle, str, len); } -INLINE int id_to_strlen(ident *id) +const char *get_id_str(ident *id) { - return id->size; + return impl.get_id_str(impl.handle, id); +} + +int get_id_strlen(ident *id) +{ + return impl.get_id_strlen(impl.handle, id); +} + +void finish_ident(void) +{ + if (impl.finish_ident) + impl.finish_ident(impl.handle); } int id_is_prefix(ident *prefix, ident *id) { - if (id_to_strlen(prefix) > id_to_strlen(id)) return 0; - return 0 == memcmp(prefix->dptr, id->dptr, id_to_strlen(prefix)); + if (get_id_strlen(prefix) > get_id_strlen(id)) return 0; + return 0 == memcmp(get_id_str(prefix), get_id_str(id), get_id_strlen(prefix)); } int id_is_suffix(ident *suffix, ident *id) { - int suflen = id_to_strlen(suffix); - int idlen = id_to_strlen(id); - char *part; + int suflen = get_id_strlen(suffix); + int idlen = get_id_strlen(id); + const char *part; if (suflen > idlen) return 0; - part = (char *)id->dptr; + part = get_id_str(id); part = part + (idlen - suflen); - return 0 == memcmp(suffix->dptr, part, suflen); + return 0 == memcmp(get_id_str(suffix), part, suflen); } int id_contains_char(ident *id, char c) { - return strchr(id_to_str(id), c) != NULL; + return strchr(get_id_str(id), c) != NULL; } -int print_id (ident *id) +ident *id_unique(const char *tag) { - return printf("%s", id_to_str(id)); -} + static unsigned unique_id = 0; + char buf[256]; -int fprint_id (FILE *F, ident *id) -{ - return fprintf(F, "%s", id_to_str(id)); -} - -int -ident_print (XP_PAR1, const xprintf_info *info ATTRIBUTE((unused)), XP_PARN) -{ - ident *id = XP_GETARG (ident *, 0); - return XPMR (ID_TO_STR (id), ID_TO_STRLEN (id)); + snprintf(buf, sizeof(buf), tag, unique_id); + unique_id++; + return new_id_from_str(buf); }