git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@367 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
XTra.KrazzY
parent
e764723832
commit
8a33d6787b
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@ -25,151 +25,195 @@
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ChunkFile::ChunkFile(const char *filename, ChunkFileMode _mode)
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{
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mode = _mode;
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data = 0;
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mode = _mode;
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data = 0;
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didFail = false;
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f = fopen(filename, mode == MODE_WRITE ? "wb" : "rb");
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if (!f) {
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didFail = true;
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return;
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}
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didFail = false;
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f = fopen(filename, mode == MODE_WRITE ? "wb" : "rb");
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if (!f) {
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didFail = true;
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return;
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}
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fseek(f, 0, SEEK_END);
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size = ftell(f);
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eof = size;
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fseek(f, 0, SEEK_END);
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size = ftell(f);
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eof = size;
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stack_ptr = 0;
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stack_ptr = 0;
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}
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ChunkFile::~ChunkFile()
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{
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if (f)
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fclose(f);
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if (f)
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fclose(f);
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}
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int ChunkFile::ReadInt()
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{
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int x;
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fread(&x, 4, 1, f);
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return x;
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int x;
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fread(&x, 4, 1, f);
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return x;
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}
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void ChunkFile::WriteInt(int x)
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{
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fwrite(&x, 4, 1, f);
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fwrite(&x, 4, 1, f);
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}
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bool ChunkFile::Do(void *ptr, int size)
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{
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int sz;
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switch (mode) {
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case MODE_READ:
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sz = ReadInt();
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if (sz != size)
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return false;
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fread(ptr, size, 1, f);
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fseek(f, ((size + 3) & ~3) - size, SEEK_CUR);
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break;
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case MODE_WRITE:
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WriteInt(size);
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fwrite(ptr, size, 1, f);
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fseek(f, ((size + 3) & ~3) - size, SEEK_CUR);
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break;
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case MODE_VERIFY:
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sz = ReadInt();
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if (sz != size)
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return false;
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fseek(f, (size + 3) & ~3, SEEK_CUR);
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break;
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}
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return true;
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int sz;
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switch (mode) {
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case MODE_READ:
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sz = ReadInt();
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if (sz != size)
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return false;
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fread(ptr, size, 1, f);
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fseek(f, ((size + 3) & ~3) - size, SEEK_CUR);
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break;
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case MODE_WRITE:
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WriteInt(size);
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fwrite(ptr, size, 1, f);
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fseek(f, ((size + 3) & ~3) - size, SEEK_CUR);
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break;
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case MODE_VERIFY:
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sz = ReadInt();
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if (sz != size)
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return false;
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fseek(f, (size + 3) & ~3, SEEK_CUR);
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break;
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}
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return true;
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}
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// Do variable size array (probably heap-allocated)
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bool DoArray(void *ptr, int size, int arrSize) {
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int sz;
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if(ptr == NULL)
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return false;
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switch (mode) {
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case MODE_READ:
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sz = ReadInt();
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if (sz != size)
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return false;
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sz = ReadInt();
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if (sz != arrSize)
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return false;
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for(int i = 0; i < arrSize; i++) {
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fread(ptr[i], size, 1, f);
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fseek(f, ((size + 3) & ~3) - size, SEEK_CUR);
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}
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break;
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case MODE_WRITE:
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WriteInt(size);
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WriteInt(arrSize);
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for(int i = 0; i < arrSize; i++) {
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fwrite(ptr[i], size, 1, f);
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fseek(f, ((size + 3) & ~3) - size, SEEK_CUR);
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}
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break;
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case MODE_VERIFY:
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sz = ReadInt();
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if (sz != size)
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return false;
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sz = ReadInt();
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if (sz != arrSize)
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return false;
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for(int i = 0; i < arrSize; i++)
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fseek(f, (size + 3) & ~3, SEEK_CUR);
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break;
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}
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return true;
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}
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//let's get into the business
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bool ChunkFile::Descend(const char *cid)
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{
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unsigned int id = *reinterpret_cast<const unsigned int*>(cid);
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if (mode == MODE_READ)
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unsigned int id = *reinterpret_cast<const unsigned int*>(cid);
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if (mode == MODE_READ)
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{
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bool found = false;
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int startPos = ftell(f);
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ChunkInfo temp = stack[stack_ptr];
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bool found = false;
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int startPos = ftell(f);
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ChunkInfo temp = stack[stack_ptr];
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//save information to restore after the next Ascend
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stack[stack_ptr].parentStartLocation = startPos;
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stack[stack_ptr].parentEOF = eof;
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//save information to restore after the next Ascend
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stack[stack_ptr].parentStartLocation = startPos;
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stack[stack_ptr].parentEOF = eof;
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unsigned int firstID = 0;
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//let's search through children..
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while (ftell(f) < eof)
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unsigned int firstID = 0;
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//let's search through children..
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while (ftell(f) < eof)
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{
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stack[stack_ptr].ID = ReadInt();
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if (firstID == 0)
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firstID = stack[stack_ptr].ID|1;
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stack[stack_ptr].length = ReadInt();
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stack[stack_ptr].startLocation = ftell(f);
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if (stack[stack_ptr].ID == id)
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stack[stack_ptr].ID = ReadInt();
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if (firstID == 0)
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firstID = stack[stack_ptr].ID|1;
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stack[stack_ptr].length = ReadInt();
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stack[stack_ptr].startLocation = ftell(f);
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if (stack[stack_ptr].ID == id)
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{
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found = true;
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break;
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found = true;
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break;
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}
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else
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else
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{
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fseek(f, stack[stack_ptr].length, SEEK_CUR); //try next block
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fseek(f, stack[stack_ptr].length, SEEK_CUR); //try next block
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}
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}
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//if we found nothing, return false so the caller can skip this
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if (!found)
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//if we found nothing, return false so the caller can skip this
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if (!found)
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{
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stack[stack_ptr] = temp;
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fseek(f, stack[stack_ptr].parentStartLocation, SEEK_SET);
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return false;
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stack[stack_ptr] = temp;
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fseek(f, stack[stack_ptr].parentStartLocation, SEEK_SET);
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return false;
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}
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//descend into it
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//pos was set inside the loop above
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eof = stack[stack_ptr].startLocation + stack[stack_ptr].length;
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stack_ptr++;
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return true;
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//descend into it
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//pos was set inside the loop above
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eof = stack[stack_ptr].startLocation + stack[stack_ptr].length;
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stack_ptr++;
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return true;
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}
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else
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else
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{
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//write a chunk id, and prepare for filling in length later
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WriteInt(id);
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WriteInt(0); //will be filled in by Ascend
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stack[stack_ptr].startLocation = ftell(f);
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stack_ptr++;
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return true;
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//write a chunk id, and prepare for filling in length later
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WriteInt(id);
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WriteInt(0); //will be filled in by Ascend
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stack[stack_ptr].startLocation = ftell(f);
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stack_ptr++;
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return true;
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}
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}
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//let's ascend out
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void ChunkFile::Ascend()
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{
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if (mode == MODE_READ)
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if (mode == MODE_READ)
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{
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//ascend, and restore information
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stack_ptr--;
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fseek(f, stack[stack_ptr].parentStartLocation, SEEK_SET);
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eof = stack[stack_ptr].parentEOF;
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//ascend, and restore information
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stack_ptr--;
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fseek(f, stack[stack_ptr].parentStartLocation, SEEK_SET);
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eof = stack[stack_ptr].parentEOF;
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}
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else
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else
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{
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stack_ptr--;
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//now fill in the written length automatically
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int posNow = ftell(f);
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fseek(f, stack[stack_ptr].startLocation - 4, SEEK_SET);
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WriteInt(posNow - stack[stack_ptr].startLocation);
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fseek(f, posNow, SEEK_SET);
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stack_ptr--;
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//now fill in the written length automatically
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int posNow = ftell(f);
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fseek(f, stack[stack_ptr].startLocation - 4, SEEK_SET);
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WriteInt(posNow - stack[stack_ptr].startLocation);
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fseek(f, posNow, SEEK_SET);
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}
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}
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int ChunkFile::GetCurrentChunkSize()
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{
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if (stack_ptr)
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return stack[stack_ptr - 1].length;
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else
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return 0;
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if (stack_ptr)
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return stack[stack_ptr - 1].length;
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else
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return 0;
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}
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@ -80,26 +80,35 @@ public:
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//void Do(int &i);
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//bool Do(std::string &s);
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bool Do(void *ptr, int size);
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bool DoArray(void *ptr, int size, int arrSize);
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// Future
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// bool DoCompressed(void *ptr, int size)
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// Store maps to file. Very useful.
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template<class T>
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void Do(std::map<u32, T> &x) {
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bool Do(std::map<u32, T> &x) {
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return false;
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}
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// Store vectors.
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template<class T>
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void Do(std::vector<T> &x) {
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bool Do(std::vector<T> &x) {
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return false;
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}
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// Disable size checks to save size for variable size array storing
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template<clsas T>
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bool DoArray(T *x, int size, int arrSize) {
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return DoArray((void *)x, size, arrSize);
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}
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// Handle everything else
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template<class T>
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void Do(T &x) {
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Do((void *)&x, sizeof(x));
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bool Do(T &x) {
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return Do((void *)&x, sizeof(x));
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}
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int GetCurrentChunkSize();
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