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/*
* Copyright 2010-2018 Adrian Thurston <thurston@colm.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <string.h>
#include <stdlib.h>
#include <colm/pdarun.h>
void init_rt_code_vect( struct rt_code_vect *vect )
{
vect->data = 0;
vect->tab_len = 0;
vect->alloc_len = 0;
}
static long new_size_up( long existing, long needed )
{
return needed > existing ? (needed<<1) : existing;
}
static long new_size_down( long existing, long needed )
{
return needed < (existing>>2) ? (needed<<1) : existing;
}
/* Up resize the data for len elements using Resize::upResize to tell us the
* new tabLen. Reads and writes allocLen. Does not read or write tabLen. */
static void up_resize( struct rt_code_vect *vect, long len )
{
/* Ask the resizer what the new tabLen will be. */
long new_len = new_size_up(vect->alloc_len, len);
/* Did the data grow? */
if ( new_len > vect->alloc_len ) {
vect->alloc_len = new_len;
if ( vect->data != 0 ) {
/* Table exists already, resize it up. */
vect->data = (code_t*) realloc( vect->data, sizeof(code_t) * new_len );
//if ( vect->data == 0 )
// throw std::bad_alloc();
}
else {
/* Create the data. */
vect->data = (code_t*) malloc( sizeof(code_t) * new_len );
//if ( vect->data == 0 )
// throw std::bad_alloc();
}
}
}
/* Down resize the data for len elements using Resize::downResize to determine
* the new tabLen. Reads and writes allocLen. Does not read or write tabLen. */
static void down_resize( struct rt_code_vect *vect, long len)
{
/* Ask the resizer what the new tabLen will be. */
long new_len = new_size_down( vect->alloc_len, len );
/* Did the data shrink? */
if ( new_len < vect->alloc_len ) {
vect->alloc_len = new_len;
if ( new_len == 0 ) {
/* Simply free the data. */
free( vect->data );
vect->data = 0;
}
else {
/* Not shrinking to size zero, realloc it to the smaller size. */
vect->data = (code_t*) realloc( vect->data, sizeof(code_t) * new_len );
//if ( vect->data == 0 )
// throw std::bad_alloc();
}
}
}
void colm_rt_code_vect_empty( struct rt_code_vect *vect )
{
if ( vect->data != 0 ) {
/* Free the data space. */
free( vect->data );
vect->data = 0;
vect->tab_len = vect->alloc_len = 0;
}
}
void colm_rt_code_vect_replace( struct rt_code_vect *vect, long pos,
const code_t *val, long len )
{
long end_pos, i;
//code_t *item;
/* If we are given a negative position to replace at then
* treat it as a position relative to the length. */
if ( pos < 0 )
pos = vect->tab_len + pos;
/* The end is the one past the last item that we want
* to write to. */
end_pos = pos + len;
/* Make sure we have enough space. */
if ( end_pos > vect->tab_len ) {
up_resize( vect, end_pos );
/* Delete any objects we need to delete. */
//item = vect->data + pos;
//for ( i = pos; i < vect->tabLen; i++, item++ )
// item->~code_t();
/* We are extending the vector, set the new data length. */
vect->tab_len = end_pos;
}
else {
/* Delete any objects we need to delete. */
//item = vect->data + pos;
//for ( i = pos; i < endPos; i++, item++ )
// item->~code_t();
}
/* Copy data in using copy constructor. */
code_t *dst = vect->data + pos;
const code_t *src = val;
for ( i = 0; i < len; i++, dst++, src++ )
*dst = *src;
}
void colm_rt_code_vect_remove( struct rt_code_vect *vect, long pos, long len )
{
long new_len, len_to_slide_over, end_pos;
code_t *dst;//, *item;
/* If we are given a negative position to remove at then
* treat it as a position relative to the length. */
if ( pos < 0 )
pos = vect->tab_len + pos;
/* The first position after the last item deleted. */
end_pos = pos + len;
/* The new data length. */
new_len = vect->tab_len - len;
/* The place in the data we are deleting at. */
dst = vect->data + pos;
/* Call Destructors. */
//item = dst;
//for ( long i = 0; i < len; i += 1, item += 1 )
// item->~code_t();
/* Shift data over if necessary. */
len_to_slide_over = vect->tab_len - end_pos;
if ( len > 0 && len_to_slide_over > 0 )
memmove(dst, dst + len, sizeof(code_t)*len_to_slide_over);
/* Shrink the data if necessary. */
down_resize( vect, new_len );
/* Set the new data length. */
vect->tab_len = new_len;
}
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