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/*
* File: glib.c Replacements for glib functions used by pmidi
*
* Copyright (C) 1999 Steve Ratcliffe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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.
*
* Code is derived from garray.c which is copyright:
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*/
#include "glib.h"
/*
* There is no need to use this file, linking against glib is preferable
* if you have it.
*/
#define MIN_ARRAY_SIZE 16
static gint
g_nearest_pow (gint num)
{
gint n = 1;
while (n < num)
n <<= 1;
return n;
}
/* Pointer Array
*/
typedef struct _GRealPtrArray GRealPtrArray;
struct _GRealPtrArray
{
gpointer *pdata;
guint len;
guint alloc;
};
GPtrArray*
g_ptr_array_new(void)
{
GRealPtrArray *array;
array = g_new(GRealPtrArray, 1);
array->pdata = NULL;
array->len = 0;
array->alloc = 0;
return (GPtrArray*) array;
}
void
g_ptr_array_free(GPtrArray *array, gboolean free_segment)
{
if (free_segment)
g_free(array->pdata);
g_free(array);
}
static void
g_ptr_array_maybe_expand(GRealPtrArray *array, gint len)
{
guint old_alloc;
if ((array->len + len) > array->alloc)
{
old_alloc = array->alloc;
array->alloc = g_nearest_pow(array->len + len);
array->alloc = MAX(array->alloc, MIN_ARRAY_SIZE);
if (array->pdata) {
array->pdata = g_realloc(array->pdata,
sizeof(gpointer) * array->alloc);
} else {
array->pdata = g_new0(gpointer, array->alloc);
}
memset(array->pdata + old_alloc, 0, array->alloc - old_alloc);
}
}
gpointer
g_ptr_array_remove_index_fast(GPtrArray* farray, guint index)
{
GRealPtrArray* array = (GRealPtrArray*)farray;
gpointer result;
result = array->pdata[index];
if (index != array->len - 1)
array->pdata[index] = array->pdata[array->len - 1];
array->pdata[array->len - 1] = NULL;
array->len -= 1;
return result;
}
typedef struct _GRealArray GRealArray;
struct _GRealArray
{
guint8 *data;
guint len;
guint alloc;
guint elt_size;
guint zero_terminated : 1;
guint clear : 1;
};
void
g_ptr_array_add(GPtrArray* farray, gpointer data)
{
GRealPtrArray* array = (GRealPtrArray*) farray;
g_ptr_array_maybe_expand(array, 1);
array->pdata[array->len++] = data;
}
static void
g_array_maybe_expand (GRealArray *array, gint len)
{
guint want_alloc = (array->len + len + array->zero_terminated) * array->elt_size;
if (want_alloc > array->alloc) {
guint old_alloc = array->alloc;
array->alloc = g_nearest_pow (want_alloc);
array->alloc = MAX(array->alloc, MIN_ARRAY_SIZE);
array->data = g_realloc (array->data, array->alloc);
if (array->clear || array->zero_terminated)
memset (array->data + old_alloc, 0, array->alloc - old_alloc);
}
}
GArray*
g_array_new (gboolean zero_terminated, gboolean clear, guint elt_size)
{
GRealArray *array;
array = g_new(GRealArray, 1);
array->data = NULL;
array->len = 0;
array->alloc = 0;
array->zero_terminated = (zero_terminated ? 1 : 0);
array->clear = (clear ? 1 : 0);
array->elt_size = elt_size;
return (GArray*) array;
}
void
g_array_free (GArray *array, gboolean free_segment)
{
if (free_segment)
g_free (array->data);
g_free(array);
}
GArray*
g_array_append_vals(GArray *farray, gconstpointer data, guint len)
{
GRealArray *array = (GRealArray*) farray;
g_array_maybe_expand (array, len);
memcpy (array->data + array->elt_size * array->len, data, array->elt_size * len);
array->len += len;
return farray;
}
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