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/**
* buffer.h defines a simple dynamic array that is used to store temporary
* values for later processing. Define BUFFER_TYPE before including this file.
*/
#include <stdlib.h>
#define BUFFER_SIZE 128
static BUFFER_TYPE buffered_object_buffer[BUFFER_SIZE];
static BUFFER_TYPE *buffered_object_overflow;
static int buffered_objects;
static int buffered_object_overflow_space;
static void set_buffered_object_at_index(BUFFER_TYPE cat, unsigned int i)
{
if (i < BUFFER_SIZE)
{
buffered_object_buffer[i] = cat;
}
else
{
i -= BUFFER_SIZE;
if (NULL == buffered_object_overflow)
{
buffered_object_overflow =
calloc(BUFFER_SIZE, sizeof(BUFFER_TYPE));
buffered_object_overflow_space = BUFFER_SIZE;
}
while (i >= buffered_object_overflow_space)
{
buffered_object_overflow_space <<= 1;
buffered_object_overflow = realloc(buffered_object_overflow,
buffered_object_overflow_space * sizeof(BUFFER_TYPE));
}
buffered_object_overflow[i] = cat;
}
}
static BUFFER_TYPE buffered_object_at_index(unsigned int i)
{
if (i<BUFFER_SIZE)
{
return buffered_object_buffer[i];
}
return buffered_object_overflow[i-BUFFER_SIZE];
}
static void compact_buffer(void)
{
// Move up all of the non-NULL pointers
unsigned size = buffered_objects;
unsigned insert = 0;
for (unsigned i=0 ; i<size ; i++)
{
BUFFER_TYPE c = buffered_object_at_index(i);
if (c != NULL)
{
set_buffered_object_at_index(c, insert++);
}
}
buffered_objects = insert;
}
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