X-Git-Url: https://git.llucax.com/z.facultad/75.06/jacu.git/blobdiff_plain/0f7b83372a77836665757c3b4037f63204e349f0..efbfacc87590729a6790eecee98b91d55615f881:/src/ppmc/ppmcdata.c diff --git a/src/ppmc/ppmcdata.c b/src/ppmc/ppmcdata.c index 8ff5c5c..bea0926 100644 --- a/src/ppmc/ppmcdata.c +++ b/src/ppmc/ppmcdata.c @@ -1,15 +1,15 @@ /* - Copyright (C) Arturo San Emeterio Campos 1999. All rights reserved. - Permission is granted to make verbatim copies of this file for private - use only. There is ABSOLUTELY NO WARRANTY. Use it at your OWN RISK. + Copyright (C) Arturo San Emeterio Campos 1999. All rights reserved. + Permission is granted to make verbatim copies of this file for private + use only. There is ABSOLUTELY NO WARRANTY. Use it at your OWN RISK. - This file is: "ppmcdata.c" - Email: arturo@arturocampos.com - Web: http://www.arturocampos.com + This file is: "ppmcdata.c" +Email: arturo@arturocampos.com +Web: http://www.arturocampos.com - Part of the ppmc encoder and decoder. +Part of the ppmc encoder and decoder. - This module contains global data. +This module contains global data. */ #include "ppmc.h" //defines @@ -48,31 +48,31 @@ unsigned int order0_max_cump; // Those are the pointers and variables used for managing the mem pool for // both context, and bytes and frequencies. struct _byte_and_freq *_bytes_pool, //pointer to pool containing linked - //lists with bytes and frequencies - *_bytes_pool_max; //the maximum of this buffer -struct context *_context_pool; //pointer to pool containing contexts -struct context *_context_pool_max; //the same as with _bytes_pool + //lists with bytes and frequencies + *_bytes_pool_max; //the maximum of this buffer + struct context *_context_pool; //pointer to pool containing contexts + struct context *_context_pool_max; //the same as with _bytes_pool -unsigned long _bytes_pool_index; //index in array of pointers -unsigned long _context_pool_index; + unsigned long _bytes_pool_index; //index in array of pointers + unsigned long _context_pool_index; -//the following is an array keeping pointers to different buffers. A new -//buffer is allocated when the current one is full, so we always have a -//buffer for linked lists. (without allocating a buffer for every element) -struct _byte_and_freq *_bytes_pool_array[_mempool_max_index]; -struct context *_context_pool_array[_mempool_max_index]; + //the following is an array keeping pointers to different buffers. A new + //buffer is allocated when the current one is full, so we always have a + //buffer for linked lists. (without allocating a buffer for every element) + struct _byte_and_freq *_bytes_pool_array[_mempool_max_index]; + struct context *_context_pool_array[_mempool_max_index]; -char ppmc_out_of_memory; //0 if we have enough memory, 1 instead, any - //routine that needs to allocate memory must - //quit if that's 1. + char ppmc_out_of_memory; //0 if we have enough memory, 1 instead, any + //routine that needs to allocate memory must + //quit if that's 1. -// Variables which contain current byte to code and order -unsigned long byte, //current byte to code - o1_byte, //order-1 byte - o2_byte, //order-2 byte - o3_byte, //order-3 byte - o4_byte; //order-4 byte + // Variables which contain current byte to code and order + unsigned long byte, //current byte to code + o1_byte, //order-1 byte + o2_byte, //order-2 byte + o3_byte, //order-3 byte + o4_byte; //order-4 byte unsigned long o2_cntxt; //used in the hash key of order-2 unsigned long o3_cntxt; //use as hash key for order-3 @@ -81,23 +81,23 @@ unsigned long full_o3_cntxt; //o1_byte, o2_byte and o3_byte together unsigned long full_o4_cntxt; //order-4-3-2-1 unsigned long coded_in_order; //in which order the last byte was coded - //it's for update exclusion - //also used for decoding +//it's for update exclusion +//also used for decoding // Variables used for coding unsigned long - total_cump, //the total cumulative probability - symb_cump, //the symbol cumulative probability - symb_prob; //the symbol frequency +total_cump, //the total cumulative probability + symb_cump, //the symbol cumulative probability + symb_prob; //the symbol frequency rangecoder rc_coder; //state of range coder rangecoder rc_decoder; //state of range decoder // File handles - FILE *file_input, //file to code - *file_output; //file where the coded data is placed +FILE *file_input, //file to code + *file_output; //file where the coded data is placed // Pointers to linked lists and context structures used for faster updating @@ -110,8 +110,8 @@ rangecoder rc_decoder; //state of range decoder struct _byte_and_freq *o2_ll_node; //pointer to linked lists under order-2 - //where does it points depends in which - //order the byte was coded. +//where does it points depends in which +//order the byte was coded. struct _byte_and_freq *o3_ll_node; //the same but for order-3 struct _byte_and_freq *o4_ll_node;