X-Git-Url: https://git.llucax.com/z.facultad/75.06/jacu.git/blobdiff_plain/0f7b83372a77836665757c3b4037f63204e349f0..efbfacc87590729a6790eecee98b91d55615f881:/src/ppmc/unppmc.c

diff --git a/src/ppmc/unppmc.c b/src/ppmc/unppmc.c
index 64281dc..501f0c4 100644
--- a/src/ppmc/unppmc.c
+++ b/src/ppmc/unppmc.c
@@ -1,17 +1,17 @@
 /*
- Copyright (C) Arturo San Emeterio Campos 1999. All rights reserved.
- Permission is granted to make verbatim copies of this program 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 program for private 
+   use only. There is ABSOLUTELY NO WARRANTY. Use it at your OWN RISK.
 
- This file is: "unppmc.c"
- Email: arturo@arturocampos.com
- Web: http://www.arturocampos.com
+   This file is: "unppmc.c"
+Email: arturo@arturocampos.com
+Web: http://www.arturocampos.com
 
 
- Part of the ppmc decoder.
+Part of the ppmc decoder.
 
- This module is the main module and calls the different modules to do
- the decoding of a file. When done prints kbyps.
+This module is the main module and calls the different modules to do
+the decoding of a file. When done prints kbyps.
 */
 
 
@@ -31,157 +31,157 @@ long filesize(FILE *stream);
 //Main
 void main (int argc, char *argv[])
 {
- unsigned long counter, //temporal counter for loops like for or while
-          counter2,     //another temporal counter for sub loops
-          size_file_output,     //the size of the output file
-          main_counter;         //used in main
- char expected_flush=0; //used for checking flushing which can't be done
-
-
- // Print title, version and copyright
- printf("UNPPMC using range coder.\n");
- printf("Copyright (C) Arturo San Emeterio Campos 1999. All rights reserved.\n");
- printf("Permission is granted to make verbatim copies of this program for private\n");
- printf("use only. There is ABSOLUTELY NO WARRANTY. Use it at your OWN RISK.\n");
-
-
-
- // Check for correct number of parameters
- if(argc!=3)
-   {
-   printf("Bad number of arguments.\n");
-   exit(1);
-   }
-
-
- // Try to open input and output files
- if((file_input=fopen(argv[1],"r+b"))==NULL)
-   {
-   printf("Couldn't open %s.\n",argv[1]);
-   exit(1);
-   }
-
- if((file_output=fopen(argv[2],"w+b"))==NULL)
-   {
-   printf("Couldn't create %s.\n",argv[2]);
-   exit(1);
-   }
-
-
- // Get output length
- fread(&size_file_output,1,4,file_input);
-
+	unsigned long counter, //temporal counter for loops like for or while
+		      counter2,     //another temporal counter for sub loops
+		      size_file_output,     //the size of the output file
+		      main_counter;         //used in main
+	char expected_flush=0; //used for checking flushing which can't be done
+
+
+	// Print title, version and copyright
+	printf("UNPPMC using range coder.\n");
+	printf("Copyright (C) Arturo San Emeterio Campos 1999. All rights reserved.\n");
+	printf("Permission is granted to make verbatim copies of this program for private\n");
+	printf("use only. There is ABSOLUTELY NO WARRANTY. Use it at your OWN RISK.\n");
+
+
+
+	// Check for correct number of parameters
+	if(argc!=3)
+	{
+		printf("Bad number of arguments.\n");
+		exit(1);
+	}
+
+
+	// Try to open input and output files
+	if((file_input=fopen(argv[1],"r+b"))==NULL)
+	{
+		printf("Couldn't open %s.\n",argv[1]);
+		exit(1);
+	}
+
+	if((file_output=fopen(argv[2],"w+b"))==NULL)
+	{
+		printf("Couldn't create %s.\n",argv[2]);
+		exit(1);
+	}
+
+
+	// Get output length
+	fread(&size_file_output,1,4,file_input);
+
 
- // Initialize ppmc decoder
- ppmc_alloc_memory();
- ppmc_initialize_contexts();
- ppmc_decoder_initialize();
+	// Initialize ppmc decoder
+	ppmc_alloc_memory();
+	ppmc_initialize_contexts();
+	ppmc_decoder_initialize();
 
 
 
- // Initialize decoder
- range_decoder_init(&rc_decoder,file_input);
+	// Initialize decoder
+	range_decoder_init(&rc_decoder,file_input);
 
 
- // Start main loop which decodes the file
- main_counter=size_file_output-4; //take in account the bytes already written
- expected_flush=0;                //we don't expect a flush yet
+	// Start main loop which decodes the file
+	main_counter=size_file_output-4; //take in account the bytes already written
+	expected_flush=0;                //we don't expect a flush yet
 
- while(main_counter!=0)
- {
+	while(main_counter!=0)
+	{
 
-// Try to decode current byte in order-4 if possible, else in lower ones
-ppmc_decode_order4();
-if(byte==-1)
- ppmc_decode_order3();
- if(byte==-1)
-   {
-   ppmc_decode_order2();
-   if(byte==-1)
-     {
-     ppmc_decode_order1();
-     if(byte==-1)
-       {
-       ppmc_decode_order0();
-       if(byte==-1)         //check if it was an escape code
-         {
-         // Decode in order-(-1)
-         ppmc_get_totf_ordern1();
-         symb_cump=range_decoder_decode(&rc_decoder,total_cump);
-         byte=ppmc_get_symbol_ordern1();
-         ppmc_get_prob_ordern1();
-         range_decoder_update(&rc_decoder,total_cump,symb_cump,symb_prob);
-         coded_in_order=0;  //update all orders
+		// Try to decode current byte in order-4 if possible, else in lower ones
+		ppmc_decode_order4();
+		if(byte==-1)
+			ppmc_decode_order3();
+		if(byte==-1)
+		{
+			ppmc_decode_order2();
+			if(byte==-1)
+			{
+				ppmc_decode_order1();
+				if(byte==-1)
+				{
+					ppmc_decode_order0();
+					if(byte==-1)         //check if it was an escape code
+					{
+						// Decode in order-(-1)
+						ppmc_get_totf_ordern1();
+						symb_cump=range_decoder_decode(&rc_decoder,total_cump);
+						byte=ppmc_get_symbol_ordern1();
+						ppmc_get_prob_ordern1();
+						range_decoder_update(&rc_decoder,total_cump,symb_cump,symb_prob);
+						coded_in_order=0;  //update all orders
 
-         // Now see if it's the code of flushing
+						// Now see if it's the code of flushing
 
-         if(symb_cump==256)
-           {
-           printf("Flushing.\n");
-           ppmc_flush_mem_dec();
-           expected_flush=0;
-           continue;            //do not output byte nor update
-           }
+						if(symb_cump==256)
+						{
+							printf("Flushing.\n");
+							ppmc_flush_mem_dec();
+							expected_flush=0;
+							continue;            //do not output byte nor update
+						}
 
-         }
-       }
-     }
-   }
+					}
+				}
+			}
+		}
 
- // Output byte and update model
+		// Output byte and update model
 
- fputc(byte,file_output);
+		fputc(byte,file_output);
 
- switch(coded_in_order) //update exclusion
-   {
-   case 0: ppmc_update_order0();        //update only order-0
-   case 1: ppmc_update_order1();        //update order-0 and order-1
-   case 2: ppmc_update_dec_order2();    //update order-0 1 and 2
-   case 3: ppmc_update_dec_order3();
-   case 4: ppmc_update_dec_order4();
-   default: break;
-  };
+		switch(coded_in_order) //update exclusion
+		{
+			case 0: ppmc_update_order0();        //update only order-0
+			case 1: ppmc_update_order1();        //update order-0 and order-1
+			case 2: ppmc_update_dec_order2();    //update order-0 1 and 2
+			case 3: ppmc_update_dec_order3();
+			case 4: ppmc_update_dec_order4();
+			default: break;
+		};
 
 
- // Check if flushing has to be done and has not been done.
- // This is optional, in case you limit the memory usage, you don't
- // need to include this
+		// Check if flushing has to be done and has not been done.
+		// This is optional, in case you limit the memory usage, you don't
+		// need to include this
 
- if(expected_flush==1)  // If flushing didn't happen, we can't decode
-   {
-   printf("Can't decompress file. Not enough memory.\nTry in a machine with more memory.\n");
-   exit(1);
-   }
- if(ppmc_out_of_memory==1)
-   {
-   expected_flush=1;    // Next code must be a flush code, otherwise we don't
-                        // have enough memory, and therefore we can't decode
-   }
+		if(expected_flush==1)  // If flushing didn't happen, we can't decode
+		{
+			printf("Can't decompress file. Not enough memory.\nTry in a machine with more memory.\n");
+			exit(1);
+		}
+		if(ppmc_out_of_memory==1)
+		{
+			expected_flush=1;    // Next code must be a flush code, otherwise we don't
+			// have enough memory, and therefore we can't decode
+		}
 
 
- // Update order variables
+		// Update order variables
 
- o4_byte=o3_byte;
- o3_byte=o2_byte;
- o2_byte=o1_byte;
- o1_byte=byte;  //current one, is next time order-1
+		o4_byte=o3_byte;
+		o3_byte=o2_byte;
+		o2_byte=o1_byte;
+		o1_byte=byte;  //current one, is next time order-1
 
- // Byte decoded and model updated, loop
- main_counter--;
+		// Byte decoded and model updated, loop
+		main_counter--;
 
 
- }
+	}
 
 
- ppmc_free_memory();
+	ppmc_free_memory();
 
- // Close file handles and free memory
- fclose(file_input);
- fclose(file_output);
-
-
- // Nicely exit
- exit(0);
+	// Close file handles and free memory
+	fclose(file_input);
+	fclose(file_output);
+
+
+	// Nicely exit
+	exit(0);
 }
 
 
@@ -192,13 +192,13 @@ if(byte==-1)
 // Returns the file size of a given file.
 long filesize(FILE *stream)
 {
-   long curpos, length;
+	long curpos, length;
 
-   curpos = ftell(stream);
-   fseek(stream, 0L, SEEK_END);
-   length = ftell(stream);
-   fseek(stream, curpos, SEEK_SET);
-   return length;
+	curpos = ftell(stream);
+	fseek(stream, 0L, SEEK_END);
+	length = ftell(stream);
+	fseek(stream, curpos, SEEK_SET);
+	return length;
 }