Simple DS text reader

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spinal	Created : 13 November 2007 Edited : 15 November 2007 Simple DS text reader
I have started a text reader for the DS, I hope yo eventually integrate it into my menu when it gets to a usable stage. So far it reads text from a file one character at a time, and currently removes multiple line breaks ignoring single ones to wrap the text a little better. I am trying to think up how to check for work breaks (spaces) to wrap words instead of characters. I have noticed a problem already in the output (not sure whats wrong with the code though) when I find and use a line break (removing multiple breaks) I lose the next character (first one in new line). I assume its the muli-line removal. anyway, here is the code so far if anyone wants to look at it, and a screeny to show the progress so far. // Includes #include <PA9.h> // Include for PA_Lib #include <fat.h> #include <sys/dir.h> // Functions long FileSize(char* filename); // Function: main() int main(int argc, char ** argv) { PA_Init(); // Initializes PA_Lib PA_InitVBL(); // Initializes a standard VBL fatInitDefault(); //Initialise fat library PA_Init8bitBg(0, 3); PA_Init8bitBg(1, 3); // int linenumber =0; //line number on the screen int screen = 1; // which screen to use char filename[256]="text.txt"; // to hold a full filename and string terminator char filetext[1],old_filetext[1]; int font_number=1; PA_SetBgPalCol(0, 0, PA_RGB(31, 31, 31)); PA_SetBgPalCol(0, 1, PA_RGB(0, 0, 0)); PA_SetBgPalCol(1, 0, PA_RGB(31, 31, 31)); PA_SetBgPalCol(1, 1, PA_RGB(0, 0, 0)); long length_of_file = FileSize(filename); long current_pos=0; FILE* testRead = fopen (filename, "rb"); //rb = read int lx=5,ly=5; while(current_pos<length_of_file-1) { old_filetext[0]=filetext[0]; fread(filetext, 1, 1, testRead); if(filetext[0]!=10 && filetext[0]!=13) { PA_SmartText(screen, lx, // Top left X ly, // Top left Y 192, // Botton right X 256, // Bottom right Y filetext, // Text 1, // Text palette color (0-255) font_number, // Text size (0-4) 3, // Text mode (0 - normal, 1 - transparent, 2 - no text, 3 - rotated 90°, 4 - 90° other way) 1); // Maximum number of characters, if you want to right letter by letter... } current_pos++; if(filetext[0]==10 && old_filetext[0]==13) { int number_of_lines=0; while(filetext[0]==10 \|\| filetext[0]==13) { fread(filetext, 1, 1, testRead); current_pos++; number_of_lines++; } if(number_of_lines>2)number_of_lines=2; lx=5; ly+=police8bitheight[font_number]number_of_lines; } lx+=pa8bitdefaultsize[font_number][(u8)filetext]; if(lx>=180) { lx=5; ly+=police8bitheight[font_number]+1; } if(ly>=240) { if(screen==1) { lx=5; ly=5; screen=0; }else{ PA_WaitFor(Pad.Newpress.A); PA_Clear8bitBg(0); PA_Clear8bitBg(1); lx=5; ly=5; screen=1; } } } fclose(testRead); // Infinite loop to keep the program running while (1) { PA_WaitForVBL(); } return 0; } // End of main() long FileSize(char* filename) { struct stat st; stat(filename, &st); return st.st_size; } --v \|edit\| Fixed the missing character thing, I needed a " PA_SmartText(screen,lx,ly,192,256,filetext,1,font_number,3,1); " at the end of my multi-line chacker.

Comments
Wednesday, 14 November 2007, 17:30
spinal	For safety (I tend to lose previous versions of stuff), I am going to shove working versions of the code in here. If anyone has any advice or ideas, just add a comment and I will, erm... read it. This version is similar to the very first, in read 100 bytes at a time instead of 1. // Includes #include <PA9.h> // Include for PA_Lib #include <fat.h> #include <sys/dir.h> // Functions long FileSize(char* filename); // Function: main() int main(int argc, char ** argv) { PA_Init(); // Initializes PA_Lib PA_InitVBL(); // Initializes a standard VBL fatInitDefault(); //Initialise fat library PA_Init8bitBg(0, 3); // Use bitmap layer PA_Init8bitBg(1, 3); // for both screens int screen = 1; // which screen to use char filename[256]="text.txt"; // to hold a full filename and string terminator char filetext[100]; // read 100 characters at a time int font_number=0; // use font number 1 PA_SetBgPalCol(0, 0, PA_RGB(31, 31, 31)); PA_SetBgPalCol(0, 1, PA_RGB(0, 0, 0)); PA_SetBgPalCol(1, 0, PA_RGB(31, 31, 31)); PA_SetBgPalCol(1, 1, PA_RGB(0, 0, 0)); long length_of_file = FileSize(filename); long current_pos=0; FILE* testRead = fopen (filename, "rb"); //rb = read // character x and y int lx=5,ly=police8bitheight[font_number]+2; int temp=0; char old_letter; char current_letter; while(current_pos<length_of_file-1) { fread(filetext, 1,100, testRead); for(temp=0; temp<100; temp++) { old_letter=current_letter; current_letter=filetext[temp]; if(current_letter==13 && old_letter ==10) { lx=5; ly+=police8bitheight[font_number]+2; }else{ PA_SmartText(screen, lx, // Top left X ly, // Top left Y 182, // Botton right X 240, // Bottom right Y &current_letter, // Text 1, // Text palette color (0-255) font_number, // Text size (0-4) 3, // Text mode (0 - normal, 1 - transparent, 2 - no text, 3 - rotated 90°, 4 - 90° other way) 100); // Maximum number of characters, if you want to right letter by letter... }// current_letter==13 lx+=pa8bitdefaultsize[font_number][(u8)current_letter]; if(lx>182) { lx=5; ly+=police8bitheight[font_number]+2; } if(ly>240) { if(screen==1) { lx=5; ly=police8bitheight[font_number]+2; screen=0; }else{ PA_WaitFor(Pad.Newpress.A); PA_Clear8bitBg(0); PA_Clear8bitBg(1); lx=5; ly=police8bitheight[font_number]+2; screen=1; } } current_pos+=1; } } fclose(testRead); // Infinite loop to keep the program running while (1) { PA_WaitForVBL(); } return 0; } // End of main() long FileSize(char* filename) { struct stat st; stat(filename, &st); return st.st_size; } --v
Thursday, 15 November 2007, 06:01
spinal	OK, latest version, now wraps words, excellent! Now though I have noticed I'm losing a line ot ext at the bottom of the first screen, it should continue straight onto the top of the second screen. // Includes #include <PA9.h> // Include for PA_Lib #include <fat.h> #include <sys/dir.h> // Functions long FileSize(char* filename); // Function: main() int main(int argc, char ** argv) { PA_Init(); // Initializes PA_Lib PA_InitVBL(); // Initializes a standard VBL fatInitDefault(); //Initialise fat library PA_Init8bitBg(0, 3); // Use bitmap layer PA_Init8bitBg(1, 3); // for both screens int screen = 1; // which screen to use char filename[256]="text.txt"; // to hold a full filename and string terminator char filetext[100]; // read 100 characters at a time int font_number=2; // use font number 1 PA_SetBgPalCol(0, 0, PA_RGB(31, 31, 31)); PA_SetBgPalCol(0, 1, PA_RGB(0, 0, 0)); PA_SetBgPalCol(1, 0, PA_RGB(31, 31, 31)); PA_SetBgPalCol(1, 1, PA_RGB(0, 0, 0)); long length_of_file = FileSize(filename); long current_pos=0; FILE* testRead = fopen (filename, "rb"); //rb = read // character x and y int lx=5,ly=police8bitheight[font_number]+2; int temp=0,temp1=0; int length_of_word=0; // how many pixels long the word is long amount_to_read; while(current_pos<length_of_file-1) { amount_to_read = length_of_file - current_pos; if(amount_to_read>100)amount_to_read=100; fread(filetext, 1,amount_to_read, testRead);// read 100 bytes of text file bool isword=false; temp=0; char wurd[100]={0}; // use a char for each word temp=0; while(temp<amount_to_read) { isword=false; length_of_word=pa8bitdefaultsize[font_number][' ']; while(isword==false) { if(filetext[temp]!=32 && filetext[temp]!=10 && temp<100) // if current letter is not space { wurd[temp1]=filetext[temp]; // coppy current letter to word length_of_word+=pa8bitdefaultsize[font_number][(u8)wurd[temp1]]; // update length accordingly temp++; temp1++; current_pos++; }else{ wurd[temp1]=0; // terminate the string isword=true; // tell loop a word is found temp1=0; temp++; current_pos++; } } if(lx+length_of_word<=182) // if we are still on the screen { // draw the word and update position PA_SmartText(screen,lx,ly,182,240,wurd,1,font_number,3,100); lx+=length_of_word; }else{ //if we are not on the screen, move down a line ly+=police8bitheight[font_number]+2; lx=5; PA_SmartText(screen,lx,ly,182,240,wurd,1,font_number,3,100); lx+=length_of_word; length_of_word=0; } if(ly>240) { if(screen==1) { lx=5; ly=police8bitheight[font_number]+2; screen=0; }else{ PA_WaitFor(Pad.Newpress.A); PA_Clear8bitBg(0); PA_Clear8bitBg(1); lx=5; ly=police8bitheight[font_number]+2; screen=1; } } }// temp<100 }//current_pos fclose(testRead); // Infinite loop to keep the program running while (1) { PA_WaitForVBL(); } return 0; } // End of main() long FileSize(char* filename) { struct stat st; stat(filename, &st); return st.st_size; } --v
Thursday, 15 November 2007, 06:26
Jayenkai	It's probably to do with "if(ly>240)".. remember that that's the TOP of the line, and that the text will in fact be going down to (ly+police8bitheight) So, you should check (ly+police8bitheight)>240 instead.
Thursday, 15 November 2007, 17:14
spinal	How could I have missed something like that, I think I am already too close to the project to look for such silly mistakes. I'm going to have to come up with some sort of interface for this, its eventual feature might include the following... bookmarks (4 or 5 maybe per file) stylus control for page turning landscape and portrait orientation mp3/mod playback (perhaps you have some relaxing music or something) different font sizes if anyone else has some suggestions let me know. \|edit\| OK, here is the latest code, it removes multiple lines and I have set it to use a custom font (see second screenshot). Whats bothering me now is that (a)I need a better font, preferably smaller but still very readable and (b) I can't think of a way to remove multiple spaces in a row. // Includes #include <PA9.h> // Include for PA_Lib #include <fat.h> #include <sys/dir.h> // Include de newly converted fonts... #include "gfx/all_gfx.c" #include "gfx/all_gfx.h" // Functions long FileSize(char* filename); // Function: main() int main(int argc, char ** argv) { PA_Init(); // Initializes PA_Lib PA_InitVBL(); // Initializes a standard VBL fatInitDefault(); //Initialise fat library PA_Init8bitBg(0, 3); // Use bitmap layer PA_Init8bitBg(1, 3); // for both screens PA_8bitCustomFont(5, bigfont); int screen = 1; // which screen to use char filename[256]="text.txt"; // to hold a full filename and string terminator char filetext[100]; // read 100 characters at a time int font_number=5; // use font number 1 PA_Load8bitBgPal(0, (void)bigfont_Pal); PA_Load8bitBgPal(1, (void)bigfont_Pal); long length_of_file = FileSize(filename); long current_pos=0; FILE* testRead = fopen (filename, "rb"); //rb = read // character x and y int lx=5,ly=police8bitheight[font_number]+2; int temp=0,temp1=0; int length_of_word=0; // how many pixels long the word is long amount_to_read; while(current_pos<length_of_file-1) { amount_to_read = length_of_file - current_pos; if(amount_to_read>200)amount_to_read=200; fread(filetext, 1,amount_to_read, testRead);// read 100 bytes of text file bool isword=false; temp=0; char wurd[200]={0}; // use a char for each word temp=0; while(temp<amount_to_read) { isword=false; length_of_word=pa8bitdefaultsize[font_number][' ']; while(isword==false) { if(filetext[temp]!=32 && filetext[temp]!=10 && temp<amount_to_read) // if current letter is not space { wurd[temp1]=filetext[temp]; // coppy current letter to word length_of_word+=pa8bitdefaultsize[font_number][(u8)wurd[temp1]]; // update length accordingly temp++; temp1++; current_pos++; }else{ wurd[temp1]=0; // terminate the string isword=true; // tell loop a word is found temp1=0; temp++; current_pos++; } if(filetext[temp]==10) { lx=5; ly+=police8bitheight[font_number]; } if(filetext[temp]==13) { int number_of_lines=0; while(filetext[temp]==13 && temp<amount_to_read) { current_pos++; number_of_lines++; temp+=1; } if(number_of_lines>2)number_of_lines=2; lx=5; ly+=police8bitheight[font_number]number_of_lines; } //if(filetext[temp]==32) //{ // while(filetext[temp]==32 && temp<amount_to_read) // { // current_pos++; // temp+=1; // } // lx+=pa8bitdefaultsize[font_number][' ']; //} } if(lx+length_of_word<=182) // if we are still on the screen { // draw the word and update position PA_SmartText(screen,lx,ly,182,240,wurd,1,font_number,3,100); lx+=length_of_word; }else{ //if we are not on the screen, move down a line ly+=police8bitheight[font_number]; lx=5; PA_SmartText(screen,lx,ly,182,240,wurd,1,font_number,3,100); lx+=length_of_word; length_of_word=0; } if(ly+police8bitheight[font_number]>240) { if(screen==1) { lx=5; ly=police8bitheight[font_number]; screen=0; }else{ PA_WaitFor(Pad.Newpress.A); PA_Clear8bitBg(0); PA_Clear8bitBg(1); lx=5; ly=police8bitheight[font_number]; screen=1; } } }// temp<100 }//current_pos fclose(testRead); // Infinite loop to keep the program running while (1) { PA_WaitForVBL(); } return 0; } // End of main() long FileSize(char filename) { struct stat st; stat(filename, &st); return st.st_size; } --v
Saturday, 17 November 2007, 18:47
spinal	Aaaaaarrrrrrrgggggghhhhhhh!!!!!!!!!!!!!11111111 After two days, TWO DAYS, of trying to get this code working in my menu I notice I have been trying to pass the file name like this show_text_file("FileNames[FileNumber].name",FileNames[FileNumber].size); --v instead of like this show_text_file(FileNames[FileNumber].name,FileNames[FileNumber].size); --v What a damn fool. Theres egg on my face I can tell you. Now if only I can get it to exit back to the menu properly.

Simple DS text reader

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