Preview screen auto extracted from tap, tzx, sna and z80 files. Reduced snap struct dimension.

This commit is contained in:
fabio.olimpieri 2015-02-08 00:38:45 +00:00
parent 87cbfeefa7
commit 1ba6cbc688
5 changed files with 691 additions and 62 deletions

View File

@ -371,17 +371,27 @@ int load_z80(char *filename) {
page=7;
break;
default:
page=11;
page=255;
break;
}
printf("Loading page %d of length %d\n",page,longitud);
if(longitud2==0xFFFF) // uncompressed raw data
retval=fread(snap->page[page],16384,1,fichero);
printf("128k: Loading page %d of length %d\n",page,longitud);
if (page==255) //Discard the page
{
if(longitud2==0xFFFF) // uncompressed raw data
retval=fread(memo,16384,1,fichero);
else
uncompress_z80(fichero,16384,memo);
}
else
uncompress_z80(fichero,16384,snap->page[page]);
{
if(longitud2==0xFFFF) // uncompressed raw data
retval=fread(snap->page[page],16384,1,fichero);
else
uncompress_z80(fichero,16384,snap->page[page]);
}
}
} else {
} else { //48k snapshot
while(!feof(fichero)) {
retval=fread(byte_read,3,1,fichero);
if(feof(fichero))
@ -398,17 +408,29 @@ int load_z80(char *filename) {
page=2;
break;
default:
page=11;
page=255;
break;
}
if(longitud2==0xFFFF) // uncompressed raw data
retval=fread(snap->page[page],16384,1,fichero);
printf("48k: Loading page %d of length %d\n",page,longitud2);
if (page==255) //Discard the page. It should never happen
{
if(longitud2==0xFFFF) // uncompressed raw data
retval=fread(memo,16384,1,fichero);
else
uncompress_z80(fichero,16384,memo);
}
else
uncompress_z80(fichero,16384,snap->page[page]);
{
if(longitud2==0xFFFF) // uncompressed raw data
retval=fread(snap->page[page],16384,1,fichero);
else
uncompress_z80(fichero,16384,snap->page[page]);
}
}
}
} else {
printf("48k model: Loading page of old type z80\n");
if(compressed) {
// 48k compressed z80 loader
@ -449,7 +471,7 @@ int load_sna(char *filename) {
int addr,loop;
tempo=(unsigned char *)malloc(49179);
tempo2=(unsigned char *)malloc(98308);
tempo2=(unsigned char *)malloc(16384*5+4);
snap=(struct z80snapshot *)malloc(sizeof(struct z80snapshot));
//Some inits
@ -476,7 +498,7 @@ int load_sna(char *filename) {
return -1;
}
if (0==fread(tempo2,1,98308,fichero)) {
if (0==fread(tempo2,1,16384*5+4,fichero)) {
printf("48K SNA\n");
type=0;
} else {
@ -675,3 +697,198 @@ void load_snap(struct z80snapshot *snap) {
break;
}
}
int extract_screen_sna (char *screen, FILE * fichero) {
unsigned char *tempo;
unsigned char *tempo2;
unsigned char type=0;
unsigned char v1;
if(fichero==NULL) return -1; // error
tempo=(unsigned char *)malloc(49179);
tempo2=(unsigned char *)malloc(16384*5+4);
if (1!=fread(tempo,49179,1,fichero)) {
free(tempo);
free(tempo2);
return -1;
}
if (0==fread(tempo2,1,16384*5+4,fichero)) {
printf("48K SNA\n");
type=0;
} else {
printf("128K SNA\n");
type=1;
}
if (type==0) { //48k
memcpy(screen,tempo+27,6912);
} else { //128k
v1=tempo2[2];
//printf("v1= %d\n",(int) v1);
if ((v1&8)==0) memcpy(screen,tempo+27,6912); //screen in bank 5
else //Screen in bank 7
{
v1&=0x07;
if (v1==7) memcpy(screen,tempo+27+49152,6912); //screen in bank 7 paged-in
else
memcpy(screen,tempo2+4+16384*4,6912); //Screen in bank 7 not paged-in
}
}
free(tempo);
free(tempo2);
return 0;
}
int extract_screen_z80 (char *screen, FILE * fichero) {
unsigned char tempo[30],tempo2[56],type,compressed,pager, byte_read[3];
unsigned char *memo;
int longitud=0,longitud2,model_type;
if(fichero==NULL) return -1; // error
memo=(unsigned char *)malloc(49152);
printf("Read Z80 file\n");
printf("Read header (first 30 bytes)\n");
fread(tempo,1,30,fichero);
if((tempo[6]==0)&&(tempo[7]==0)) { // extended Z80
printf("It's an extended Z80 file\n");
type=1; // new type
fread(tempo2,1,2,fichero); // read the length of the extension
longitud=((int)tempo2[0])+256*((int)tempo2[1]);
if(longitud>54) {
printf("Not suported Z80 file\n");
free(memo);
return -3; // not a supported Z80 file
}
printf("Length: %d\n",longitud);
fread(tempo2+2,1,longitud,fichero);
if(longitud==23) // z80 ver 2.01
switch(tempo2[4]) {
case 0:
case 1:
model_type=0; // 48K
break;
case 3:
case 4:
model_type=1; // 128K
break;
default:
printf("Again not suported Z80 file\n");
free(memo);
return -3; // not a supported Z80 file
break;
}
else // z80 ver 3.0x
switch(tempo2[4]) {
case 0:
case 1:
case 3:
model_type=0; // 48K
break;
case 4:
case 5:
case 6:
model_type=1; // 128K
break;
default:
free(memo);
return -3; // not a supported Z80 file
break;
}
} else {
printf("Old type z80\n");
type=0; // old type
model_type=0; // 48k
}
if(tempo[12]&32)
compressed=1;
else
compressed=0;
if (type) pager=tempo2[5];
if(type) { // extended z80
if(model_type==1) { // 128K snapshot
while(!feof(fichero)) {
fread(byte_read,3,1,fichero);
if(feof(fichero))
break;
longitud2=((int)byte_read[0])+256*((int)byte_read[1]);
printf("128k model: Loading page %d of length %d\n",byte_read[2]-3,longitud);
if (((byte_read[2] == 8) && ((pager&8)==0))|| //Page 5 and no shadow screen
((byte_read[2] == 10) && (pager&8))) //Page 7 and shadow screen
{
if(longitud2==0xFFFF) // uncompressed raw data
fread(memo,6912,1,fichero);
else
uncompress_z80(fichero,6912,memo);
memcpy(screen, memo,6912);
break;
}
if(longitud2==0xFFFF) longitud2 =16384; // uncompressed raw data
fread(memo,longitud2,1,fichero);
}
} else { //48k snapshot
while(!feof(fichero)) {
fread(byte_read,3,1,fichero);
if(feof(fichero))
break;
longitud2=((int)byte_read[0])+256*((int)byte_read[1]);
printf("48k model: Loading page of length %d\n",longitud2);
if (byte_read[2] == 8) //Page 0
{
if(longitud2==0xFFFF) // uncompressed raw data
fread(memo,6912,1,fichero);
else
uncompress_z80(fichero,6912,memo);
memcpy(screen, memo,6912);
break;
}
if(longitud2==0xFFFF) longitud2 =16384; // uncompressed raw data
fread(memo,longitud2,1,fichero);
}
}
} else { //Old type z80
printf("48k model: Loading page of old type z80\n");
if(compressed) {
// 48k compressed z80 loader
// we uncompress first the data
uncompress_z80(fichero,6912,memo); //uncompress only the screen
memcpy(screen,memo,6912);
} else {
// 48k uncompressed z80 loader
fread(screen,6912,1,fichero);
}
}
free(memo);
return 0; // all right
}

View File

@ -29,7 +29,7 @@ struct z80snapshot {
byte type; // bit 0/1: 48K/128K/+3
byte border; // border color
byte pager; // content of pagination register in 128K mode
unsigned char page[12][16384];
unsigned char page[8][16384];
//unsigned int found_pages; // bit=1: page exists. bit=0: page don't exists.
unsigned char ay_regs[16];
unsigned char ay_latch;
@ -42,3 +42,5 @@ int load_z80(char *);
int load_sna(char *);
void load_snap(struct z80snapshot *);
void uncompress_z80(FILE *,int,unsigned char *);
int extract_screen_sna (char *screen, FILE * fichero);
int extract_screen_z80 (char *screen, FILE * fichero);

View File

@ -43,6 +43,7 @@
#include "minizip/unzip.h"
#include "tape_browser.h"
#include "cargador.h"
#include "sound.h"
@ -514,27 +515,124 @@ void print_font(SDL_Surface *screen, int r, int g, int b,
SDL_FreeSurface(font_surf);
}
void draw_scr_file(int x,int y, char *filename)
int extract_screen(char* screen, const char* name)
{
FILE *fichero;
char filename[MAX_PATH_LENGTH];
char char_id[10];
int retorno;
if ((ext_matches(name, ".tap")||ext_matches(name, ".TAP")))
{
sprintf(filename,"%s/%s",load_path_taps, name);
fichero=fopen(filename,"rb");
if (!fichero) //Try in the tmp zip directory
{
sprintf(filename,"%s/%s",path_tmp, name);
fichero=fopen(filename,"rb");
if (!fichero) return -1;
}
retorno = extract_screen_tap(screen, fichero);
fclose(fichero);
return retorno;
}
if ((ext_matches(name, ".tzx")||ext_matches(name, ".TZX")))
{
sprintf(filename,"%s/%s",load_path_taps, name);
fichero=fopen(filename,"rb");
if (!fichero) //Try in the tmp zip directory
{
sprintf(filename,"%s/%s",path_tmp, name);
fichero=fopen(filename,"rb");
if (!fichero) return -1;
}
fread(char_id,10,1,fichero); // read the (maybe) TZX header
if((strncmp(char_id,"ZXTape!",7)) || (char_id[7]!=0x1A) || (char_id[8]!=1))
{fclose(fichero);retorno = -1;};
retorno = extract_screen_tzx(screen, fichero);
fclose(fichero);
return retorno;
}
if (ext_matches(name, ".z80")||ext_matches(name, ".Z80")||ext_matches(name, ".sna")||ext_matches(name, ".SNA"))
{
sprintf(filename,"%s/%s",load_path_snaps, name);
fichero=fopen(filename,"rb");
if (!fichero) //Try in the tmp zip directory
{
sprintf(filename,"%s/%s",path_tmp, name);
fichero=fopen(filename,"rb");
if (!fichero) return -1;
}
if (ext_matches(name, ".z80")||ext_matches(name, ".Z80")) retorno = extract_screen_z80(screen, fichero);
else retorno = extract_screen_sna(screen, fichero);
fclose(fichero);
return retorno;
}
return -1;
}
void draw_scr_file(int x,int y, const char *selected_file, int which)
{
FILE *fichero;
char screen [6912];
unsigned int *p_translt, *p_translt2;
unsigned char attribute, ink, paper, mask, octect;
int loop_x, loop_y,bucle,valor,*p ;
int loop_x, loop_y,bucle,valor,*p, length;
unsigned char *address;
char name[MAX_PATH_LENGTH];
char filename[MAX_PATH_LENGTH];
char *ptr;
if (filename==NULL) // Aborted
if (selected_file==NULL) // Aborted
return;
strcpy(name,selected_file);
if (!(ext_matches(filename, ".scr")||ext_matches(filename, ".SCR"))) return;
if ((ext_matches(name, ".zip")||ext_matches(name, ".ZIP")))
{
//remove the zip extension
ptr = strrchr (name, '.');
if (ptr) *ptr = 0;
}
fichero=fopen(filename,"rb");
//remove the other extensions
ptr = strrchr (name, '.');
if (ptr) *ptr = 0;
//Always load from Default device
strcpy(filename,getenv("HOME"));
length=strlen(filename);
if ((length>0)&&(filename[length-1]!='/'))
strcat(filename,"/");
if (which==0) strcat(filename, "scr/"); else strcat(filename, "scr2/");
strcat(filename, name);
strcat(filename, ".scr");
if (which) //second SCR
{
fichero=fopen(filename,"rb");
if (!fichero) return;
if (!fichero) return;
if (fread(screen,1,6912,fichero)!=6912) {fclose(fichero);return;}
fclose(fichero);
}
else //first SCR
{
fichero=fopen(filename,"rb");
if (!fichero)
{if (extract_screen(screen, selected_file)) return;}
else
{
if (fread(screen,1,6912,fichero)!=6912) {fclose(fichero);return;}
fclose(fichero);
}
}
if (fread(screen,1,6912,fichero)!=6912) {fclose(fichero);return;}
fclose(fichero);
p_translt = ordenador.translate;
p_translt2 = ordenador.translate2;
@ -631,10 +729,7 @@ static void menu_draw(SDL_Surface *screen, menu_t *p_menu, int sel, int font_typ
SDL_Rect r;
int entries_visible = (p_menu->y2 - p_menu->y1-10/RATIO) / line_height - 1;
const char *selected_file = NULL;
char filename[MAX_PATH_LENGTH];
char name[MAX_PATH_LENGTH];
char *ptr;
int i, y, length, max_string;
int i, y, max_string;
if (font_type==FONT_ALT) y_start = p_menu->y1 + line_height+2/RATIO;
else y_start = p_menu->y1 + line_height+4/RATIO;
@ -835,40 +930,8 @@ static void menu_draw(SDL_Surface *screen, menu_t *p_menu, int sel, int font_typ
if ((!selected_file)||(selected_file[0] == '[')) return; //No dir
// Select after "/"
if (strrchr(selected_file, '/'))
strcpy(name, strrchr(selected_file, '/') + 1);
else strcpy(name,selected_file);
if ((ext_matches(name, ".zip")||ext_matches(name, ".ZIP")))
{
//remove the zip extension
ptr = strrchr (name, '.');
if (ptr) *ptr = 0;
}
//remove the other extensions
ptr = strrchr (name, '.');
if (ptr) *ptr = 0;
//Always load from Default device
strcpy(filename,getenv("HOME"));
length=strlen(filename);
if ((length>0)&&(filename[length-1]!='/'))
strcat(filename,"/");
strcat(filename, "scr/");
strcat(filename, name);
strcat(filename, ".scr");
draw_scr_file(375,48, filename);
strcpy(filename,getenv("HOME"));
length=strlen(filename);
if ((length>0)&&(filename[length-1]!='/'))
strcat(filename,"/");
strcat(filename, "scr2/");
strcat(filename, name);
strcat(filename, ".scr");
draw_scr_file(375,260, filename);
draw_scr_file(375,48, selected_file,0);
draw_scr_file(375,260, selected_file,1);
}
}

View File

@ -130,6 +130,7 @@ void create_browser_tzx (FILE * fichero) {
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
//if (longitud==6914) save_scr_browser(value+1);
}
break;
default: //Custom data
@ -395,6 +396,7 @@ void create_browser_tap (FILE * fichero) {
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
//if (longitud==6914) save_scr_browser(value+1);
}
break;
default: //Custom data
@ -546,4 +548,347 @@ void free_browser()
block_select_list[bucle]=NULL;
}
}
}
/*
void save_scr_browser(unsigned char* zx_screen)
{
//const char *tape = ordenador.last_selected_file;
const char *tape =ordenador.current_tap;
char *ptr;
FILE *fichero;
char db[MAX_PATH_LENGTH];
char fb[81];
int retorno,retval;
// Name (for saves) - TO CHECK
if (tape && strrchr(tape, '/'))
strncpy(fb, strrchr(tape, '/') + 1, 80);
else
strcpy(fb, "unknown");
//remove the extension
ptr = strrchr (fb, '.');
if (ptr) *ptr = 0;
// Save SCR 1 file
snprintf(db, MAX_PATH_LENGTH-1, "%s/%s.scr", path_scr1, fb);
fichero=fopen(db,"rb");
if(fichero!=NULL)
{
fclose(fichero);
return; // file already exists
}
fichero=fopen(db,"wb"); // create for write
if(fichero==NULL)
retorno=-1;
else {
retval=fwrite(zx_screen,6912,1,fichero); // save screen
//if (ordenador.ulaplus!=0) {
//retval=fwrite(ordenador.ulaplus_palete,64,1,fichero); // save ULAPlus palete
//}
fclose(fichero);
retorno=0;
}
switch(retorno) {
case 0:
msgInfo("Screen saved",3000,NULL);
break;
case -1:
msgInfo("Can't create screen file",3000,NULL);
break;
default:
break;
}
return;
}
*/
int extract_screen_tap (char *screen, FILE * fichero) {
unsigned int longitud;
unsigned char value[65536], empty, flag_byte;
int retval, retorno;
if (fichero == NULL) return -1;
empty=file_empty(fichero);
if (empty) return -1;
flag_byte=0;
retorno=0;
do {
retval=fread (value, 1, 2, fichero); // read length of current block
if (retval!=2) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1]);
retval=fread (&flag_byte, 1, 1, fichero);
if (retval!=1) {retorno=1;break;}
//printf("TAP browser: flag byte %X en %ld\n",flag_byte, ftell(fichero));
switch(flag_byte)
{
case 0x00: //header
if (longitud!=19)
{
if (longitud>1)
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
}
}
else
{
retval=fread (value, 1, 18, fichero);
if (retval!=18) {retorno=1;break;}
}
break;
case 0xFF: //data
if (longitud>1)
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
if (longitud==6914) {memcpy(screen, value+1, 6912);rewind_tape (fichero,1);return 0;}
}
break;
default: //Custom data
if (longitud>1)
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
if (longitud==6914) {memcpy(screen, value+1, 6912);rewind_tape (fichero,1);return 0;}
}
break;
}
} while ((!feof(fichero))&&(retorno==0));
rewind_tape (fichero,1);
return -1;
}
int extract_screen_tzx (char *screen, FILE * fichero)
{
unsigned int longitud, bucle, byte_position, retorno;
unsigned char value[65536], empty, blockid, pause[2], flag_byte;
char block_jump[2];
int retval, retval2;
//int found_screen;
longitud =0;
pause[0]=pause[1]=0;
blockid=0;
flag_byte=0;
//found_screen=0;
if (fichero == NULL) return -1;
empty=file_empty(fichero);
if (empty) return -1;
retorno=0;
do {
byte_position=ftell(fichero);
retval=fread (&blockid, 1, 1, fichero); //Read id block
if (retval!=1) {retorno=1;break;}
//printf("TZX browser: %X en %d\n",blockid, byte_position+1);
switch(blockid) {
case 0x10: // classic tape block
retval=fread (pause, 1, 2, fichero); //pause lenght
retval2=fread (value, 1, 2, fichero); // read length of current block
if ((retval!=2)||(retval2!=2)) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1]);
retval=fread (&flag_byte, 1, 1, fichero);
if (retval!=1) {retorno=1;break;}
switch(flag_byte)
{
case 0x00: //header
if (longitud!=19)
{
if (longitud>1)
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
}
}
else
{
retval=fread (value, 1, 18, fichero);
if (retval!=18) {retorno=1;break;}
}
break;
case 0xFF: //data
if (longitud>1)
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
if (longitud==6914) {memcpy(screen, value+1, 6912);rewind_tape (fichero,1);return 0;}
}
break;
default: //Custom data
if (longitud>1)
{
retval=fread (value, 1, longitud-1, fichero);
if (retval!=(longitud-1)) {retorno=1;break;}
if (longitud==6914) {memcpy(screen, value+1, 6912);rewind_tape (fichero,1);return 0;}
}
break;
}
break;
case 0x11: // turbo
fread(value,1,0x0F, fichero);
retval=fread (value, 1,3 ,fichero); // read length of current block
if (retval!=3) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1])+ 65536 * ((unsigned int) value[2]);
if (longitud< 65536)
{retval=fread (value, 1, longitud, fichero); if (retval!=longitud) {retorno=1;break;}}
else
for(bucle=0;bucle<longitud;bucle++)
fread(value,1,1, fichero);
//if (longitud==6144) {printf("Possible screen (6144) in turbo data\n");}
//if (longitud==6912) {printf("Possible screen (6912) in turbo data\n");}
break;
case 0x12: // pure tone
retval=fread(value,1,4,fichero);
if (retval!=4) {retorno=1;break;}
break;
case 0x13: // multiple pulses
retval=fread(value,1,1,fichero); // number of pulses
if (retval!=1) {retorno=1;break;}
if(value[0] != 0)
{
fread(&value,1,2*value[0],fichero); // length of pulse in T-states
}
break;
case 0x14: // Pure data
fread(value,1,0x07, fichero);
retval=fread (value, 1, 3, fichero); // read length of current block
if (retval!=3) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1])+ 65536 * ((unsigned int) value[2]);
if (longitud< 65536)
{retval=fread (value, 1, longitud, fichero); if (retval!=longitud) {retorno=1;break;}}
else
for(bucle=0;bucle<longitud;bucle++)
fread(value,1,1, fichero);
//if (longitud==6144) {memcpy(screen, value, 6144);found_screen=1;}
//if ((longitud==768) && (found_screen)) {memcpy(screen+6144, value, 768);rewind_tape (fichero,1);return 0;}
//if (longitud==6912) {memcpy(screen, value, 6912);rewind_tape (fichero,1);return 0;}
break;
case 0x20: // pause
retval=fread(value,1,2,fichero);
if (retval!=2) {retorno=1;break;}
break;
case 0x21: // group start
retval=fread(value,1,1,fichero);
if (retval!=1) {retorno=1;break;}
longitud = (unsigned int) value[0];
retval=fread(value,1,longitud,fichero);
if (retval!=longitud) {retorno=1;break;}
break;
case 0x22: // group end
break;
case 0x23: // jump to block
retval=fread(block_jump,1,2,fichero);
if (retval!=2) {retorno=1;break;}
break;
case 0x24: // loop start
retval=fread(value,1,2, fichero);
if (retval!=2) {retorno=1;break;}
break;
case 0x25: // loop end
break;
case 0x28: // select block
retval=fread(value,1,2,fichero);
if (retval!=2) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1]);
retval=fread(value,1,longitud,fichero);
if (retval!=longitud) {retorno=1;break;}
break;
case 0x2A: // pause if 48K
retval=fread(value,1,4,fichero);
if (retval!=4) {retorno=1;break;}
break;
case 0x30: // text description
retval=fread(value,1,1,fichero); // length
if (retval!=1) {retorno=1;break;}
longitud = (unsigned int) value[0] ;
retval=fread(value,1,longitud,fichero);
if (retval!=longitud) {retorno=1;break;}
break;
case 0x31: // show text
retval=fread(value,1,1,fichero); //Time lengt
if (retval!=1) {retorno=1;break;}
retval=fread(value,1,1,fichero); // length
if (retval!=1) {retorno=1;break;}
longitud = (unsigned int) value[0];
retval=fread(value,1,longitud,fichero);
if (retval!=longitud) {retorno=1;break;}
break;
case 0x32: // archive info
retval=fread(value,1,2,fichero); // length
if (retval!=2) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1]);
retval=fread(value,1,longitud,fichero);
if (retval!=longitud) {retorno=1;break;}
break;
case 0x33: // hardware info
retval=fread(value,1,1,fichero);
if (retval!=1) {retorno=1;break;}
longitud = (unsigned int) value[0] *3;
retval=fread(value,1,longitud,fichero);
if (retval!=longitud) {retorno=1;break;}
break;
case 0x34: // emulation info
retval=fread(value,1,8,fichero);
if (retval!=8) {retorno=1;break;}
break;
case 0x35: // custom info
fread(value,1,16,fichero);
retval=fread(value,1,4,fichero);
if (retval!=4) {retorno=1;break;}
longitud = ((unsigned int) value[0]) + 256 * ((unsigned int) value[1]) + 65536*((unsigned int) value[2]) + 16777216*((unsigned int) value[3]);
if (longitud< 65536)
{retval=fread (value, 1, longitud, fichero); if (retval!=longitud) {retorno=1;break;}}
else
for(bucle=0;bucle<longitud;bucle++)
fread(value,1,1, fichero);
break;
default: // not supported
retorno=1; //Error
break;
}
} while ((!feof(fichero))&&(retorno==0));
rewind_tape (fichero,1);
return -1;
}

View File

@ -42,5 +42,7 @@ void create_browser_tzx (FILE *);
int select_block(FILE * fichero);
int jump_to_block(FILE * fichero, int blocks_to_jump);
void free_browser();
//void save_scr_browser(unsigned char* zx_screen);
int extract_screen_tap (char *screen, FILE * fichero);
int extract_screen_tzx (char *screen, FILE * fichero);
#endif