X-Git-Url: https://harishankar.org/repos/?p=wordblah.git;a=blobdiff_plain;f=wordblox.h;h=22963e4dba5d2ffb1b933fcc74de78e401916a75;hp=cabda97f7e83b6df55fef1f5638f385cda8364f7;hb=3d73a89d86191634ac382e0772708389686b8dde;hpb=48a65b2e455c24d2482fd9098c918935714a198f

diff --git a/wordblox.h b/wordblox.h
index cabda97..22963e4 100644
--- a/wordblox.h
+++ b/wordblox.h
@@ -5,6 +5,7 @@
 #include <gd.h>
 #include <gdfontmb.h>
 #include <gdfontg.h>
+#include <zlib.h>
 #include "constantstrings.h"
 
 #define MAX_PUZZLE_SIZE 20
@@ -316,22 +317,31 @@ void init_puzzle (Puzzle *p, int grid_size)
 /* save the puzzle to a file */
 void save_puzzle (Puzzle *puzzle, const char* file) {
 	FILE *outfile;
-	outfile = fopen (file, "w");
+	/* First output the uncompressed contents to temp file */
+	outfile = tmpfile ();
 	if (outfile == NULL)
 	{
 		fprintf (stderr, "%s\n", ERROR_WRITING_FILE);
 		exit (1);
 	}
+	/* grid size is the first field */
 	fprintf (outfile, "%d\n", puzzle->grid_size);
+	/* whether grid is frozen or not */
 	fprintf (outfile, "%d\n", puzzle->grid_frozen);
+	/* the hashed password */
 	fprintf (outfile, "%s\n", puzzle->hashed_password);
+	/* the salt */
 	fprintf (outfile, "%s\n", puzzle->salt);
+	
+	/* First output the grid characters columns/rows */
 	for (int i = 0; i < puzzle->grid_size; i ++)
 	{
 		for (int j = 0; j < puzzle->grid_size; j ++)
 			fprintf (outfile, "%c", puzzle->chars[i][j]);
 		fprintf (outfile, "\n");
 	}
+	
+	/* Next output the start across/down numbers */
 	for (int i = 0; i < puzzle->grid_size; i ++)
 	{
 		for (int j = 0; j < puzzle->grid_size; j++)
@@ -341,40 +351,103 @@ void save_puzzle (Puzzle *puzzle, const char* file) {
 		}
 		fprintf (outfile, "\n");
 	}
+	
+	/* Output the across clues */
 	fprintf (outfile, "ACROSS\n");
+	/* Search the grid for across words */
 	for (int i = 0; i < puzzle->grid_size; i ++)
 	{
 		for (int j = 0; j < puzzle->grid_size; j++)
 		{
+			/* if it is an across word, then put the word index followed by
+			tab character (as separator) and the clue */
 			if (puzzle->start_across_word[i][j] != -1)
 				fprintf (outfile, "%d\t%s\n", puzzle->start_across_word[i][j], 
 					puzzle->clue_across[i][j]);
 		}
 	}
+	
+	/* Output the down clues */
 	fprintf (outfile, "DOWN\n");
+	/* Search the grid for down words */
 	for (int i = 0; i < puzzle->grid_size; i ++)
 	{
 		for (int j = 0; j < puzzle->grid_size; j++)
 		{
+			/* same as across word, put the word index followed by the tab
+			character and then the clue */
 			if (puzzle->start_down_word[i][j] != -1)
 				fprintf (outfile, "%d\t%s\n", puzzle->start_down_word[i][j], 
 					puzzle->clue_down[i][j]);
 		}
 	}
-
+	
+	/* Flush the buffer and rewind to beginning - to read and save into 
+	gzip compressed file */
+	fflush (outfile);
+	fseek (outfile, 0, 0);
+		
+	/* now compress the file and save it to destination file */
+	gzFile outdestfile = gzopen (file, "wb");
+	if (outdestfile == NULL)
+	{
+		fprintf (stderr, ERROR_WRITING_FILE);
+		fclose (outfile);
+		exit (1);
+	}
+	char buf[4096];
+	while (fread (buf, sizeof(char), 4096, outfile))
+	{
+		int res = gzwrite (outdestfile, buf, strlen (buf) );
+		if (res == 0)
+		{
+			fprintf (stderr, "%s %s", ERROR_WRITING_FILE, COMPRESSED);
+			fclose (outfile);
+			exit (1);
+		}
+	}
+	gzclose (outdestfile);
 	fclose (outfile);
+
 }
 
 /* read the puzzle from a file */
 Puzzle load_puzzle (const char* file) {
-	FILE *infile;
-	Puzzle p;
-	infile = fopen (file, "rb");
-	if (infile == NULL)
+	/* First open the GZip file */
+	gzFile insourcefile = gzopen (file, "rb");
+	if (insourcefile == NULL)
 	{
-		fprintf (stderr, "%s\n", ERROR_READING_FILE);
+		fprintf (stderr, "%s %s", ERROR_READING_FILE, COMPRESSED);
 		exit (1);
 	}
+	/* Open a temporary file to uncompress the contents */
+	FILE *infile = tmpfile ();
+	if (infile == NULL)
+	{
+		fprintf (stderr, ERROR_READING_FILE);
+		exit (1);	
+	}
+	/* Put the uncompressed content to the temp file */
+	char buf[4096];
+	while (gzread (insourcefile, buf, 4096))
+	{
+		int res = fwrite (buf, sizeof(char), strlen (buf), infile);
+		if (res == 0)
+		{
+			fprintf (stderr, ERROR_READING_FILE);
+			fclose (infile);
+			gzclose (insourcefile);
+			exit (1);
+		}
+	}
+	/* Close the gzip file */
+	gzclose (insourcefile);
+	/* Flush the temp file buffer and rewind to beginning */
+	fflush (infile);
+	fseek (infile, 0, 0);
+
+	/* Read the temporary file contents to the structure Puzzle */
+	Puzzle p;
 	char line[MAX_CLUE_LENGTH+10];
 	fgets (line, MAX_CLUE_LENGTH + 10, infile);
 	p.grid_size = atoi (line);