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loadsave.c: Add functions to open file with alternate extension.

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Used by CPC format which are in several files :
PPH format uses PPH, ODD, EVE
CM5 uses CM5 + GFX
This commit is contained in:
Thomas Bernard
2018-02-17 16:05:42 +01:00
parent fda4708756
commit be824627ce
6 changed files with 257 additions and 117 deletions
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213
src/miscfileformats.c
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@@ -3217,15 +3217,12 @@ void Load_CM5(T_IO_Context* context)
// Set palette to the CPC hardware colors
// Load the palette data to the 4 colorlayers
FILE *file;
char filename[MAX_PATH_CHARACTERS];
byte value = 0;
int mod=0;
short line = 0;
int tx, ty;
byte buffer[48*6/4];
Get_full_filename(filename, context->File_name, context->File_directory);
if (!(file = Open_file_read(context)))
{
File_error = 1;
@@ -3330,22 +3327,11 @@ void Load_CM5(T_IO_Context* context)
fclose(file);
// Load the pixeldata to the 5th layer
file = Open_file_read_with_alternate_ext(context, "gfx");
if (file == NULL)
{
char* ext = filename + strlen(filename) - 3;
int idx = 8;
do {
if (-- idx < 0)
{
File_error = 1;
return;
}
ext[0] = (idx & 1) ? 'g':'G';
ext[1] = (idx & 2) ? 'f':'F';
ext[2] = (idx & 4) ? 'x':'X';
file = fopen(filename, "rb");
} while(file == NULL);
File_error = 1;
return;
}
Set_loading_layer(context, 4);
@@ -3368,12 +3354,9 @@ void Load_CM5(T_IO_Context* context)
void Save_CM5(T_IO_Context* context)
{
char filename[MAX_PATH_CHARACTERS];
FILE* file;
int tx, ty;
Get_full_filename(filename, context->File_name, context->File_directory);
// TODO: Check picture has 5 layers
// TODO: Check the constraints on the layers
// Layer 1 : 1 color Only
@@ -3407,12 +3390,10 @@ void Save_CM5(T_IO_Context* context)
fclose(file);
// Now the pixeldata
filename[strlen(filename) - 3] = 0;
strcat(filename,"gfx");
if (!(file = fopen(filename, "wb")))
if (!(file = Open_file_write_with_alternate_ext(context, "gfx")))
{
File_error = 2;
return;
File_error = 2;
return;
}
setvbuf(file, NULL, _IOFBF, 64*1024);
@@ -3460,91 +3441,92 @@ void Save_CM5(T_IO_Context* context)
void Test_PPH(T_IO_Context * context)
{
FILE *file;
char buffer[MAX_PATH_CHARACTERS];
byte buffer[6];
long file_size;
int w;
int expected;
File_error = 1;
if ((file = Open_file_read(context)))
{
// First check file size is large enough to hold the header
file_size = File_length_file(file);
if (file_size < 11) {
File_error = 1;
goto abort;
}
file = Open_file_read(context);
if (file == NULL)
return;
// File is large enough for the header, now check if the data makes some sense
fread(buffer, 1, 6, file);
if (buffer[0] > 5) {
// Unknown mode
File_error = 2;
goto abort;
}
w = buffer[1] | (buffer[2] << 8);
if (w < 2 || w > 384) {
// Invalid width
File_error = 3;
goto abort;
}
w = buffer[3] | (buffer[4] << 8);
if (w < 1 || w > 272) {
// Invalid height
File_error = 4;
goto abort;
}
if (buffer[5] < 1 || buffer[5] > 28)
{
// Invalid palettes count
File_error = 5;
goto abort;
}
expected = 6; // Size of header
switch(buffer[0])
{
case 0:
case 3:
case 4:
// Palette size should be 16 bytes, only 1 palette.
if (buffer[5] != 1) {
File_error = 7;
goto abort;
}
expected += 16;
break;
case 1:
case 5:
expected += buffer[5] * 5 - 1;
break;
case 2:
// Palete size should be 2 bytes
if (buffer[5] != 1) {
File_error = 7;
goto abort;
}
expected += 2;
break;
}
if (file_size != expected)
{
File_error = 6;
goto abort;
}
File_error = 0;
} else {
File_error = 8;
// First check file size is large enough to hold the header
file_size = File_length_file(file);
if (file_size < 11) {
File_error = 1;
goto abort;
}
// File is large enough for the header, now check if the data makes some sense
if (!Read_bytes(file, buffer, 6))
goto abort;
if (buffer[0] > 5) {
// Unknown mode
File_error = 2;
goto abort;
}
w = buffer[1] | (buffer[2] << 8);
if (w < 2 || w > 384) {
// Invalid width
File_error = 3;
goto abort;
}
w = buffer[3] | (buffer[4] << 8);
if (w < 1 || w > 272) {
// Invalid height
File_error = 4;
goto abort;
}
if (buffer[5] < 1 || buffer[5] > 28)
{
// Invalid palettes count
File_error = 5;
goto abort;
}
expected = 6; // Size of header
switch(buffer[0])
{
case 0:
case 3:
case 4:
// Palette size should be 16 bytes, only 1 palette.
if (buffer[5] != 1) {
File_error = 7;
goto abort;
}
expected += 16;
break;
case 1:
case 5:
expected += buffer[5] * 5 - 1;
break;
case 2:
// Palette size should be 2 bytes
if (buffer[5] != 1) {
File_error = 7;
goto abort;
}
expected += 2;
break;
}
if (file_size != expected)
{
File_error = 6;
goto abort;
}
File_error = 0;
abort:
fclose(file);
if (file != NULL)
fclose(file);
// TODO: check existence of .ODD/.EVE files with the same name
}
@@ -3564,7 +3546,6 @@ void Load_PPH(T_IO_Context* context)
{
FILE *file;
FILE *feven;
char filename[MAX_PATH_CHARACTERS];
// Read in the header
uint8_t mode;
@@ -3574,7 +3555,6 @@ void Load_PPH(T_IO_Context* context)
int i,j;
uint8_t a,b,c,d;
int file_size;
char* ext;
uint8_t pl[16];
static const T_Components CPCPAL[27] =
@@ -3590,8 +3570,6 @@ void Load_PPH(T_IO_Context* context)
{ 0xF3, 0xF3, 0x0D }, { 0xF3, 0xF3, 0x6D }, { 0xFF, 0xF3, 0xF9 }
};
Get_full_filename(filename, context->File_name, context->File_directory);
if (!(file = Open_file_read(context)))
{
File_error = 1;
@@ -3713,18 +3691,19 @@ void Load_PPH(T_IO_Context* context)
// Load the picture data
// There are two pages, each storing bytes in the CPC vram format but lines in
// linear order.
ext = filename + strlen(filename) - 3; // TODO : make a function to load file with another extension !
ext[0] = 'O';
ext[1] = 'D';
ext[2] = 'D';
file = fopen(filename, "rb");
ext[0] = 'E';
ext[1] = 'V';
ext[2] = 'E';
feven = fopen(filename, "rb");
file = Open_file_read_with_alternate_ext(context, "odd");
if (file == NULL)
{
File_error = 3;
return;
}
feven = Open_file_read_with_alternate_ext(context, "eve");
if (feven == NULL)
{
File_error = 4;
fclose(file);
return;
}
c = 0;
d = 0;