93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
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/*
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* fstdebug.c
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* Debugging stubs for fast encoder
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*/
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#include <string.h>
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#include <stdio.h>
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#include <crtdbg.h>
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#include "deflate.h"
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#ifdef FULL_DEBUG
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void FastEncoderVerifyHashes(t_encoder_context *context, long bufpos)
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{
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int i;
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const t_search_node *lookup = context->fast_encoder->lookup;
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const t_search_node *prev = context->fast_encoder->prev;
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const BYTE *window = context->fast_encoder->window;
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for (i = 0; i < FAST_ENCODER_HASH_TABLE_SIZE; i++)
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{
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t_search_node where = lookup[i];
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t_search_node next_where;
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while (where != 0 && bufpos - where < FAST_ENCODER_WINDOW_SIZE)
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{
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int hash = FAST_ENCODER_RECALCULATE_HASH(where);
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_ASSERT(hash == i);
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next_where = prev[where & FAST_ENCODER_WINDOW_MASK];
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if (bufpos - next_where >= FAST_ENCODER_WINDOW_SIZE)
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break;
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_ASSERT(next_where < where);
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where = next_where;
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}
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}
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}
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void FastEncoderVerifyHashChain(t_encoder_context *context, long bufpos, int chain_number)
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{
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const t_search_node *lookup = context->fast_encoder->lookup;
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const t_search_node *prev = context->fast_encoder->prev;
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BYTE *window = context->fast_encoder->window;
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t_search_node where;
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t_search_node next_where;
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int print = 0;
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top:
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where = lookup[chain_number];
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if (print)
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printf("Verify chain %d\n", chain_number);
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while (where != 0 && bufpos - where < FAST_ENCODER_WINDOW_SIZE)
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{
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int hash = FAST_ENCODER_RECALCULATE_HASH(where);
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BYTE *window = context->fast_encoder->window;
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if (print)
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printf(" loc %d: char = %3d %3d %3d\n", where, window[where], window[where+1], window[where+2]);
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if (hash != chain_number && print == 0)
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{
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print = 1;
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goto top;
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}
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_ASSERT(hash == chain_number);
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next_where = prev[where & FAST_ENCODER_WINDOW_MASK];
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if (bufpos - next_where >= FAST_ENCODER_WINDOW_SIZE)
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break;
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if (next_where >= where && print == 0)
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{
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print = 1;
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goto top;
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}
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_ASSERT(next_where < where);
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where = next_where;
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}
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}
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#endif
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