493 lines
8.9 KiB
C
493 lines
8.9 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <glib.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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typedef struct _GRealStringChunk GRealStringChunk;
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typedef struct _GRealString GRealString;
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struct _GRealStringChunk
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{
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GHashTable *const_table;
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GSList *storage_list;
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gint storage_next;
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gint this_size;
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gint default_size;
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};
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struct _GRealString
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{
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gchar *str;
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gint len;
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gint alloc;
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};
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static GMemChunk *string_mem_chunk = NULL;
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/* Hash Functions.
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*/
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/* Pete, you may have these elsewhere. */
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gint
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g_string_equal(gpointer v, gpointer v2)
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{
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return strcmp ((gchar*) v, (gchar*)v2) == 0;
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}
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/* a char* hash function from ASU */
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guint
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g_string_hash(gpointer v)
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{
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char *s = (char*)v;
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char *p;
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guint h=0, g;
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for(p = s; *p != '\0'; p += 1) {
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h = ( h << 4 ) + *p;
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if ( ( g = h & 0xf0000000 ) ) {
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h = h ^ (g >> 24);
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h = h ^ g;
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}
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}
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return h /* % M */;
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}
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/* String Chunks.
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*/
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GStringChunk*
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g_string_chunk_new (gint default_size)
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{
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GRealStringChunk *new_chunk = g_new (GRealStringChunk, 1);
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gint size = 1;
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while (size < default_size)
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size <<= 1;
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new_chunk->const_table = NULL;
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new_chunk->storage_list = NULL;
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new_chunk->storage_next = size;
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new_chunk->default_size = size;
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new_chunk->this_size = size;
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return (GStringChunk*) new_chunk;
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}
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void
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g_string_chunk_free (GStringChunk *fchunk)
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{
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GRealStringChunk *chunk = (GRealStringChunk*) fchunk;
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GSList *tmp_list;
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if (chunk->storage_list)
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{
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GListAllocator *tmp_allocator = g_slist_set_allocator (NULL);
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for (tmp_list = chunk->storage_list; tmp_list; tmp_list = tmp_list->next)
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g_free (tmp_list->data);
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g_slist_free (chunk->storage_list);
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g_slist_set_allocator (tmp_allocator);
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}
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if (chunk->const_table)
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g_hash_table_destroy (chunk->const_table);
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g_free (chunk);
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}
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gchar*
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g_string_chunk_insert (GStringChunk *fchunk,
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gchar* string)
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{
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GRealStringChunk *chunk = (GRealStringChunk*) fchunk;
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gint len = strlen (string);
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char* pos;
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if ((chunk->storage_next + len + 1) > chunk->this_size)
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{
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GListAllocator *tmp_allocator = g_slist_set_allocator (NULL);
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gint new_size = chunk->default_size;
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while (new_size < len+1)
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new_size <<= 1;
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chunk->storage_list = g_slist_prepend (chunk->storage_list,
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g_new (char, new_size));
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chunk->this_size = new_size;
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chunk->storage_next = 0;
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g_slist_set_allocator (tmp_allocator);
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}
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pos = ((char*)chunk->storage_list->data) + chunk->storage_next;
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strcpy (pos, string);
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chunk->storage_next += len + 1;
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return pos;
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}
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gchar*
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g_string_chunk_insert_const (GStringChunk *fchunk,
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gchar* string)
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{
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GRealStringChunk *chunk = (GRealStringChunk*) fchunk;
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char* lookup;
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if (!chunk->const_table)
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chunk->const_table = g_hash_table_new (g_string_hash, g_string_equal);
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lookup = (char*) g_hash_table_lookup (chunk->const_table, string);
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if (!lookup)
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{
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lookup = g_string_chunk_insert (fchunk, string);
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g_hash_table_insert (chunk->const_table, lookup, lookup);
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}
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return lookup;
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}
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/* Strings.
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*/
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static gint
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nearest_pow (gint num)
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{
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gint n = 1;
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while (n < num)
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n <<= 1;
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return n;
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}
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static void
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g_string_maybe_expand (GRealString* string, gint len)
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{
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if (string->len + len >= string->alloc)
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{
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string->alloc = nearest_pow (string->len + len + 1);
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string->str = g_realloc (string->str, string->alloc);
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}
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}
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GString*
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g_string_new (gchar *init)
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{
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GRealString *string;
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if (!string_mem_chunk)
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string_mem_chunk = g_mem_chunk_new ("string mem chunk",
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sizeof (GRealString),
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1024, G_ALLOC_AND_FREE);
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string = g_chunk_new (GRealString, string_mem_chunk);
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string->alloc = 2;
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string->len = 0;
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string->str = g_new0(char, 2);
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if (init)
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g_string_append ((GString*)string, init);
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return (GString*) string;
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}
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void
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g_string_free (GString *string, gint free_segment)
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{
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if (free_segment)
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g_free (string->str);
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g_mem_chunk_free (string_mem_chunk, string);
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}
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GString*
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g_string_assign (GString *lval,
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char *rval)
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{
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g_string_truncate (lval, 0);
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g_string_append (lval, rval);
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return lval;
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}
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GString*
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g_string_truncate (GString* fstring, gint len)
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{
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GRealString *string = (GRealString*)fstring;
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string->len = len;
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string->str[len] = 0;
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return fstring;
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}
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GString*
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g_string_append (GString *fstring, gchar *val)
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{
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GRealString *string = (GRealString*)fstring;
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int len = strlen (val);
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g_string_maybe_expand (string, len);
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strcpy (string->str + string->len, val);
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string->len += len;
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return fstring;
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}
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GString*
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g_string_append_c (GString *fstring, char c)
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{
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GRealString *string = (GRealString*)fstring;
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g_string_maybe_expand (string, 1);
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string->str[string->len++] = c;
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string->str[string->len] = 0;
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return fstring;
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}
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GString*
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g_string_prepend (GString *fstring, gchar *val)
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{
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GRealString *string = (GRealString*)fstring;
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gint len = strlen (val);
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g_string_maybe_expand (string, len);
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g_memmove (string->str, string->str + len, string->len);
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strncpy (string->str, val, len);
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string->len += len;
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string->str[string->len] = 0;
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return fstring;
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}
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GString*
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g_string_prepend_c (GString *fstring, char c)
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{
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GRealString *string = (GRealString*)fstring;
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g_string_maybe_expand (string, 1);
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g_memmove (string->str, string->str + 1, string->len);
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string->str[0] = c;
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string->len += 1;
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string->str[string->len] = 0;
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return fstring;
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}
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static int
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get_length_upper_bound (gchar* fmt, va_list *args)
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{
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int len = 0;
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int short_int;
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int long_int;
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int done;
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char *tmp;
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while (*fmt)
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{
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char c = *fmt++;
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short_int = FALSE;
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long_int = FALSE;
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if (c == '%')
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{
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done = FALSE;
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while (*fmt && !done)
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{
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switch (*fmt++)
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{
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case '*':
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len += va_arg(*args, int);
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break;
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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fmt -= 1;
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len += strtol (fmt, &fmt, 10);
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break;
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case 'h':
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short_int = TRUE;
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break;
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case 'l':
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long_int = TRUE;
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break;
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/* I ignore 'q' and 'L', they're not portable anyway. */
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case 's':
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tmp = va_arg(*args, char *);
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if(tmp)
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len += strlen (tmp);
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else
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len += strlen ("(null)");
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done = TRUE;
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break;
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case 'd':
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case 'i':
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case 'o':
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case 'u':
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case 'x':
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case 'X':
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if (long_int)
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(void)va_arg (*args, long);
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else if (short_int)
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(void)va_arg (*args, int);
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else
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(void)va_arg (*args, int);
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len += 32;
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done = TRUE;
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break;
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case 'D':
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case 'O':
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case 'U':
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(void)va_arg (*args, long);
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len += 32;
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done = TRUE;
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break;
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case 'e':
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case 'E':
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case 'f':
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case 'g':
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(void)va_arg (*args, double);
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len += 32;
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done = TRUE;
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break;
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case 'c':
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(void)va_arg (*args, int);
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len += 1;
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done = TRUE;
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break;
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case 'p':
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case 'n':
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(void)va_arg (*args, void*);
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len += 32;
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done = TRUE;
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break;
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case '%':
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len += 1;
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done = TRUE;
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break;
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default:
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break;
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}
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}
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}
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else
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len += 1;
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}
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return len;
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}
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char*
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g_vsprintf (gchar *fmt,
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va_list *args,
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va_list *args2)
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{
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static gchar *buf = NULL;
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static gint alloc = 0;
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gint len = get_length_upper_bound (fmt, args);
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if (len >= alloc)
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{
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if (buf)
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g_free (buf);
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alloc = nearest_pow (MAX(len + 1, 1024));
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buf = g_new (char, alloc);
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}
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vsprintf (buf, fmt, *args2);
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return buf;
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}
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static void
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g_string_sprintfa_int (GString *string,
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gchar *fmt,
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va_list *args,
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va_list *args2)
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{
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g_string_append (string, g_vsprintf (fmt, args, args2));
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}
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void
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g_string_sprintf (GString *string, gchar *fmt, ...)
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{
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va_list args, args2;
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va_start(args, fmt);
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va_start(args2, fmt);
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g_string_truncate (string, 0);
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g_string_sprintfa_int (string, fmt, &args, &args2);
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va_end(args);
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va_end(args2);
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}
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void
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g_string_sprintfa (GString *string, gchar *fmt, ...)
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{
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va_list args, args2;
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va_start(args, fmt);
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va_start(args2, fmt);
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g_string_sprintfa_int (string, fmt, &args, &args2);
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va_end(args);
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va_end(args2);
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}
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