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/* Copyright (C) 2007 Josh MacDonald */
#include <stdio.h>
#define SPACE_MAX 32768
#define PAGE_SIZE 4096
#define OUTPUT_MAX 1024
#define IOPT_SIZE 1024
#define XD3_ALLOCSIZE 256
// typedef void* (xd3_alloc_func) (void *opaque,
// usize_t items,
// usize_t size);
// typedef void (xd3_free_func) (void *opaque,
// void *address);
#include "xdelta3.h"
#include "xdelta3.c"
typedef struct _context {
uint8_t *buffer;
int allocated;
} context_t;
void*
process_alloc (void* opaque, usize_t items, usize_t size)
{
context_t *ctx = (context_t*) opaque;
usize_t t = items * size;
void *ret;
if (ctx->allocated + t > SPACE_MAX)
{
return NULL;
}
ret = ctx->buffer + ctx->allocated;
ctx->allocated += t;
return ret;
}
int
process_page (int is_encode,
int (*func) (xd3_stream *),
const uint8_t *input,
usize_t input_size,
const uint8_t *source,
uint8_t *output,
usize_t *output_size,
usize_t output_size_max,
int flags) {
xd3_stream *stream;
xd3_config *config;
xd3_source *src;
context_t *ctx = calloc(OUTPUT_MAX, 1);
int ret;
ctx->buffer = ((char*)ctx) + sizeof(*ctx);
ctx->allocated = sizeof(*ctx);
stream = process_alloc (ctx, 1, sizeof(*stream));
config = process_alloc (ctx, 1, sizeof(*config));
src = process_alloc (ctx, 1, sizeof(*src));
config->flags = flags;
config->winsize = PAGE_SIZE;
config->sprevsz = PAGE_SIZE;
config->srcwin_maxsz = PAGE_SIZE;
config->iopt_size = IOPT_SIZE;
config->alloc = &process_alloc;
config->opaque = (void*) ctx;
src->size = PAGE_SIZE;
src->blksize = PAGE_SIZE;
src->onblk = PAGE_SIZE;
src->curblk = source;
src->curblkno = 0;
if ((ret = xd3_config_stream (stream, config)) != 0 ||
(ret = xd3_set_source (stream, src)) != 0 ||
(ret = xd3_process_stream (is_encode,
stream,
func, 1,
input, PAGE_SIZE,
output, output_size,
output_size_max)) != 0)
{
// (void) 0;
}
xd3_free_stream (stream);
return ret;
}
int test(int stride, int encode_flags)
{
uint8_t frompg[PAGE_SIZE];
uint8_t topg[PAGE_SIZE];
uint8_t output[OUTPUT_MAX];
uint8_t reout[OUTPUT_MAX];
usize_t output_size;
usize_t re_size;
int i, j, ret;
for (i = 0; i < PAGE_SIZE; i++)
{
topg[i] = frompg[i] = lrand48();
}
// change 1 byte every stride
if (stride > 0)
{
for (j = stride; j <= PAGE_SIZE; j += stride)
{
topg[j - 1] ^= 0xff;
}
}
if ((ret = process_page (1, xd3_encode_input,
topg, PAGE_SIZE,
frompg, output,
&output_size, OUTPUT_MAX,
encode_flags)) != 0)
{
return ret;
}
if ((ret = process_page (1, xd3_decode_input,
output, output_size,
frompg, reout,
&re_size, PAGE_SIZE,
0)) != 0)
{
return ret;
}
if (output_size > OUTPUT_MAX || re_size != PAGE_SIZE)
{
printf ("internal error\n");
return -1;
}
printf("stride %d flags 0x%x size %u ", stride, encode_flags, output_size);
printf("%s\n", (ret == 0) ? "OK" : "FAIL");
return 0;
}
int main()
{
int stride;
int level;
int ret;
for (level = 1; level < 10; level = (level == 1 ? 3 : level + 3))
{
int lflag = level << XD3_COMPLEVEL_SHIFT;
for (stride = 0; stride <= PAGE_SIZE; stride += PAGE_SIZE / 64)
{
if ((ret = test(stride, lflag)) ||
(ret = test(stride, lflag | XD3_ADLER32)) ||
(ret = test(stride, lflag | XD3_SEC_DJW)))
{
return ret;
}
}
}
return 0;
}
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