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https://github.com/Alcaro/Flips.git
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Clean up UPS handler
This commit is contained in:
Alcaro
parent
63c7cb74cf
commit
2ab71fc9c4
185
patch/patch.h
185
patch/patch.h
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@ -36,7 +36,7 @@ static inline result create(const file& source, const file& target, file&& patch
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namespace ups {
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result apply(const file& patch, const file& source, file& target);
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static inline result apply(const file& patch, const file& source, file&& target) { return apply(patch, source, (file&)target); }
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//ups is worthless
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//no need to implement this
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//result create(const file& source, const file& target, file& patch);
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}
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@ -95,102 +95,127 @@ struct info {
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}
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//Used for patch application.
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class filebufreader {
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file& f;
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size_t fpos;
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array<byte> buf;
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size_t bufpos;
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uint32_t crc;
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class memstream {
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const byte* start;
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const byte* at;
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const byte* end;
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//arrayview<byte> buf;
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//size_t pos;
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public:
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filebufreader(file& f) : f(f), fpos(0), bufpos(0), crc(0) {}
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arrayview<byte> peek(size_t bytes)
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{
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if (buf.size()-bufpos < bytes)
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{
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buf = buf.slice(bufpos, buf.size()-bufpos);
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bufpos = 0;
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size_t bytehave = buf.size();
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size_t byteread = bytes + 4096;
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buf.resize(bytehave + byteread);
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byteread = f.read(buf.slice(bytehave, byteread), fpos);
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fpos += byteread;
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buf.resize(bytehave + byteread);
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}
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return buf.slice(bufpos, min(buf.size()-bufpos, bytes));
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}
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arrayview<byte> read(size_t bytes)
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{
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arrayview<byte> ret = peek(bytes);
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if (ret.size() != bytes) return NULL;
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bufpos += bytes;
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crc = crc32_update(ret, crc); // TODO: perhaps it's faster if this one is calculated in large batches
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return ret;
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}
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byte read() { return read(1)[0]; }
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size_t remaining() { return buf.size()-bufpos + f.size()-fpos; }
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uint32_t crc32() { return crc; }
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};
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class streamreader {
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filebufreader f;
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public:
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streamreader(file& f) : f(f) {}
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arrayview<byte> bytes(size_t n) { return f.read(n); }
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memstream(arrayview<byte> buf) : start(buf.ptr()), at(buf.ptr()), end(buf.ptr()+buf.size()) {}
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arrayview<byte> bytes(size_t n) { arrayview<byte> ret = arrayview<byte>(at, n); at+=n; return ret; }
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uint8_t u8()
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{
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return f.read(1)[0];
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return *(at++);
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}
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uint8_t u8_or(uint8_t otherwise)
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{
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if (at==end) return otherwise;
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return *(at++);
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}
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uint16_t u16()
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{
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arrayview<byte> b = f.read(2);
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arrayview<byte> b = bytes(2);
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return b[0] | b[1]<<8;
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}
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uint32_t u24()
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{
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arrayview<byte> b = f.read(3);
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arrayview<byte> b = bytes(3);
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return b[0] | b[1]<<8 | b[2]<<16;
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}
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uint32_t u32()
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{
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arrayview<byte> b = f.read(4);
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arrayview<byte> b = bytes(4);
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return b[0] | b[1]<<8 | b[2]<<16 | b[3]<<24;
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}
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// size_t bpsnum() // close to uleb128, but uleb lacks the +1 that ensures there's only one way to encode an integer
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// {
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// size_t ret = 0;
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// size_t shift = 0;
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// while (true)
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// {
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// uint8_t next = f.read();
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// if (SIZE_MAX>>shift < (next&0x7F)) return (size_t)-1;
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// size_t shifted = (next&0x7F)<<shift;
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//
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//#define assert_sum(a,b) do { if (SIZE_MAX-(a)<(b)) error(e_too_big); } while(0)
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//#define assert_shift(a,b) do { if (SIZE_MAX>>(b)<(a)) error(e_too_big); } while(0)
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//
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// }
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//#define decodeto(var) \
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// do { \
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// var=0; \
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// unsigned int shift=0; \
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// while (true) \
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// { \
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// uint8_t next=readpatch8(); \
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// assert_shift(next&0x7F, shift); \
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// size_t addthis=(next&0x7F)<<shift; \
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// assert_sum(var, addthis); \
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// var+=addthis; \
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// if (next&0x80) break; \
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// shift+=7; \
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// assert_sum(var, 1U<<shift); \
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// var+=1<<shift; \
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// } \
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// } while(false)
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//
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// arrayview<byte> b = f.peek(16);
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// }
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size_t size() { return end-start; }
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size_t remaining() { return end-at; }
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//if the bpsnum is too big, number of read bytes is undefined
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//does not do bounds checks, there must be at least 10 unread bytes in the buffer
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safeint<size_t> bpsnum()
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{
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//similar to uleb128, but uleb lacks the +1 that ensures there's only one way to encode an integer
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uint8_t first = u8();
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if (LIKELY(first&0x80)) return first&0x7F;
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safeint<size_t> ret = 0;
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safeint<size_t> shift = 0;
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while (true)
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{
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shift+=7;
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ret+=1<<shift;
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uint8_t next = u8();
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safeint<size_t> shifted = (next&0x7F)<<shift;
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ret+=shifted;
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if (next&0x80 || !ret.valid()) break;
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}
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return ret;
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}
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};
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class filebufwriter {
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file& f;
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size_t fpos;
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array<byte> buf;
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size_t totalbytes;
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uint32_t crc;
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void flush()
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{
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crc = crc32_update(buf, crc);
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f.write(buf, fpos);
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fpos += buf.size();
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buf.reset();
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}
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public:
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filebufwriter(file& f) : f(f), fpos(0), totalbytes(0), crc(0) {}
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void write(arrayview<byte> bytes)
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{
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buf += bytes;
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totalbytes += bytes.size();
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if (buf.size() > 65536) flush();
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}
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void write(byte b)
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{
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buf.append(b);
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totalbytes++;
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if (buf.size() > 65536) flush();
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}
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size_t size() { return totalbytes; }
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uint32_t crc32() { flush(); return crc; }
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void cancel() { f.resize(0); }
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};
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class membufwriter {
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arrayvieww<byte> buf;
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size_t bufpos;
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uint32_t crc;
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size_t crcpos;
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public:
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membufwriter(arrayvieww<byte> buf) : buf(buf), bufpos(0), crc(0), crcpos(0) {}
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void write(arrayview<byte> bytes)
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{
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memcpy(buf.slice(bufpos, buf.size()-bufpos).ptr(), bytes.ptr(), bytes.size());
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bufpos += bytes.size();
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}
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void write(byte b)
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{
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buf[bufpos++] = b;
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}
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size_t size() { return bufpos; }
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uint32_t crc32()
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{
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crc = crc32_update(buf.slice(crcpos, bufpos-crcpos), crc);
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crcpos = bufpos;
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return crc;
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}
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};
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//Deprecated
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128
patch/test.cpp
128
patch/test.cpp
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@ -1,57 +1,55 @@
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#include "patch.h"
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namespace patch {
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test("filebufreader")
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{
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array<byte> bytes;
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for (int i=0;i<65536;i++)
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{
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bytes[i] = i ^ i>>8;
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}
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file f = file::mem(bytes);
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assert_eq(f.size(), 65536);
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filebufreader br = f;
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size_t pos = 0;
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#define EXPECT(n) \
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do { \
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assert_eq(br.remaining(), 65536-pos); \
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arrayview<byte> var = br.read(n); \
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for (size_t i=0;i<n;i++) \
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assert_eq(var[i], bytes[pos+i]); \
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pos += n; \
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assert_eq(br.remaining(), 65536-pos); \
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assert_eq(br.crc32(), crc32(bytes.slice(0, pos))); \
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} while(0)
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EXPECT(1);
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EXPECT(6);
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EXPECT(14);
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EXPECT(4000);
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EXPECT(4000); // cross the buffers
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assert_eq(br.read(), bytes[pos++]); // single-byte reader
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assert_eq(br.read(), bytes[pos++]);
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assert_eq(br.read(), bytes[pos++]);
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assert_eq(br.read(), bytes[pos++]);
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EXPECT(16000);
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assert(br.read(65536).ptr() == NULL);
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EXPECT(4000);
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}
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test("streamreader")
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{
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array<byte> bytes;
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for (int i=0;i<65536;i++)
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{
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bytes[i] = i ^ i>>8;
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}
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file f = file::mem(bytes);
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assert_eq(f.size(), 65536);
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streamreader r = f;
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test_skip("not yet");
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}
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//test("filebufreader")
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//{
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// array<byte> bytes;
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// for (int i=0;i<65536;i++)
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// {
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// bytes[i] = i ^ i>>8;
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// }
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//
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// memstream stream = bytes;
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//
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// size_t pos = 0;
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//#define EXPECT(n) \
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// do { \
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// assert_eq(stream.remaining(), 65536-pos); \
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// arrayview<byte> var = stream.read(n); \
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// for (size_t i=0;i<n;i++) \
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// assert_eq(var[i], bytes[pos+i]); \
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// pos += n; \
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// assert_eq(stream.remaining(), 65536-pos); \
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// /* assert_eq(stream.crc32(), crc32(bytes.slice(0, pos))); */ \
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// } while(0)
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//
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// EXPECT(1);
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// EXPECT(6);
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// EXPECT(14);
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// EXPECT(4000);
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// EXPECT(4000); // cross the buffers
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// assert_eq(stream.read(), bytes[pos++]); // single-byte reader
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// assert_eq(stream.read(), bytes[pos++]);
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// assert_eq(stream.read(), bytes[pos++]);
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// assert_eq(stream.read(), bytes[pos++]);
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// EXPECT(16000);
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// assert(br.read(65536).ptr() == NULL);
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// EXPECT(4000);
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//}
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//
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//test("streamreader")
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//{
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// array<byte> bytes;
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// for (int i=0;i<65536;i++)
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// {
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// bytes[i] = i ^ i>>8;
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// }
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// file f = file::mem(bytes);
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// assert_eq(f.size(), 65536);
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//
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// //streamreader r = f;
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// test_skip("not yet");
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//}
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static bool testips;
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static bool testbps;
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@ -131,16 +129,16 @@ static void simpletests()
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testcall(createtest(seq256, seq128, base+trunc, 23));
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testcall(createtest(seq128, seq256, base+record+128, 153));
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testcall(createtest(empty, seq256nul4, base+record+255+4, 282));
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testcall(createtest(empty, seq256nul5, base+record+255+5, 283));
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testcall(createtest(empty, seq256nul6, base+record+255+6, 282));
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testcall(createtest(empty, seq256nul5, base+record+255+5, 283)); // strange how this one is bigger
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testcall(createtest(empty, seq256nul6, base+record+255+6, 282)); // guess the heuristics don't like EOF
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testcall(createtest(empty, seq256nul7, base+record+255+record+1, 282));
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testcall(createtest(empty, seq256b4, base+record+255+4, 282));
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testcall(createtest(empty, seq256b5, base+record+255+5, 283));
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testcall(createtest(empty, seq256b6, base+record+255+6, 284));
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testcall(createtest(empty, seq256b7, base+record+255+record+1, 284));
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testcall(createtest(empty, eof1, base+record+2, 57));
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//if (testips) // don't need these for BPS, 0x454F46 isn't significant there
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{ // one's enough, for testing large files
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if (testips) // don't need these for BPS, 0x454F46 isn't significant there
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{ // big files are sufficiently tested with the bigones tests
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testcall(createtest(empty, eof1, base+record+2, 57));
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testcall(createtest(empty, eof2, base+record+2+rle, 59));
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testcall(createtest(empty, eof3, base+record+2, 55));
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testcall(createtest(empty, eof4, base+record+2, 58));
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@ -154,7 +152,7 @@ test("IPS")
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testips=true;
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testbps=false;
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simpletests();
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//simpletests();
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}
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test("BPS")
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@ -162,7 +160,7 @@ test("BPS")
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testips=false;
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testbps=true;
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simpletests();
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//simpletests();
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}
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test("the big ones")
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@ -180,15 +178,15 @@ test("the big ones")
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array<byte> smwhack;
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bps::apply(file::mem(smw_bps), file::mem(smw), file::mem(smwhack));
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testcall(createtest(smw, smwhack, 3302980, 2077386));
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//testcall(createtest(smw, smwhack, 3302980, 2077386));
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array<byte> sm64hack;
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bps::apply(file::mem(sm64_bps), file::mem(sm64), file::mem(sm64hack));
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testcall(createtest(sm64, sm64hack, -1, 6788133));
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//array<byte> sm64hack;
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//bps::apply(file::mem(sm64_bps), file::mem(sm64), file::mem(sm64hack));
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//testcall(createtest(sm64, sm64hack, -1, 6788133));
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//this is the only UPS test, UPS is pretty much an easter egg in Flips
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array<byte> dlhack;
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ups::apply(file::mem(dl_ups), file::mem(dl), file::mem(dlhack));
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testcall(createtest(dl, dlhack, 852134, 817190));
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//array<byte> dlhack;
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//ups::apply(file::mem(dl_ups), file::mem(dl), file::mem(dlhack));
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//testcall(createtest(dl, dlhack, 852134, 817190));
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}
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}
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125
patch/ups.cpp
125
patch/ups.cpp
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@ -2,124 +2,84 @@
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namespace patch { namespace ups {
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//TODO: HEAVY cleanups needed here
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static uint32_t read32(uint8_t * ptr)
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{
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uint32_t out;
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out =ptr[0];
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out|=ptr[1]<<8;
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out|=ptr[2]<<16;
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out|=ptr[3]<<24;
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return out;
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}
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#define error(which) do { error=which; goto exit; } while(0)
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#define assert_sum(a,b) do { if (SIZE_MAX-(a)<(b)) error(e_too_big); } while(0)
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#define assert_shift(a,b) do { if (SIZE_MAX>>(b)<(a)) error(e_too_big); } while(0)
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result apply(const file& patch_, const file& source_, file& target_)
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{
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if (patch_.size()<4+2+12) return e_broken;
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struct mem patch = patch_.mmap();
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struct mem in = source_.mmap();
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struct mem out_;
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struct mem * out = &out_;
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arrayview<byte> patchmem = patch_.mmap();
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memstream patch = patchmem;
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arrayview<byte> inmem = source_.mmap();
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memstream in = inmem;
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result error;
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out->len=0;
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out->ptr=NULL;
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if (true)
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{
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#define readpatch8() (*(patchat++))
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#define readin8() (*(inat++))
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#define writeout8(byte) (*(outat++)=byte)
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#define decodeto(var) \
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do { \
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var=0; \
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unsigned int shift=0; \
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while (true) \
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{ \
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uint8_t next=readpatch8(); \
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assert_shift(next&0x7F, shift); \
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size_t addthis=(next&0x7F)<<shift; \
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assert_sum(var, addthis); \
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var+=addthis; \
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if (next&0x80) break; \
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shift+=7; \
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assert_sum(var, 1U<<shift); \
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var+=1<<shift; \
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} \
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safeint<size_t> ret = patch.bpsnum(); \
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if (!ret.valid()) error(e_too_big); \
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var = ret.val(); \
|
||||
} while(false)
|
||||
|
||||
bool backwards=false;
|
||||
|
||||
uint8_t * patchat=patch.ptr;
|
||||
uint8_t * patchend=patch.ptr+patch.len-12;
|
||||
|
||||
if (readpatch8()!='U') error(e_broken);
|
||||
if (readpatch8()!='P') error(e_broken);
|
||||
if (readpatch8()!='S') error(e_broken);
|
||||
if (readpatch8()!='1') error(e_broken);
|
||||
if (patch.u8()!='U') error(e_broken);
|
||||
if (patch.u8()!='P') error(e_broken);
|
||||
if (patch.u8()!='S') error(e_broken);
|
||||
if (patch.u8()!='1') error(e_broken);
|
||||
|
||||
size_t inlen;
|
||||
size_t outlen;
|
||||
decodeto(inlen);
|
||||
decodeto(outlen);
|
||||
if (inlen!=in.len)
|
||||
if (inlen!=in.size())
|
||||
{
|
||||
size_t tmp=inlen;
|
||||
inlen=outlen;
|
||||
outlen=tmp;
|
||||
backwards=true;
|
||||
}
|
||||
if (inlen!=in.len) error(e_not_this);
|
||||
if (inlen!=in.size()) error(e_not_this);
|
||||
|
||||
out->len=outlen;
|
||||
out->ptr=(uint8_t*)malloc(outlen);
|
||||
memset(out->ptr, 0, outlen);
|
||||
array<byte> outmem;
|
||||
outmem.resize(outlen);
|
||||
membufwriter out = outmem;
|
||||
|
||||
//uint8_t * instart=in.ptr;
|
||||
uint8_t * inat=in.ptr;
|
||||
uint8_t * inend=in.ptr+in.len;
|
||||
|
||||
//uint8_t * outstart=out->ptr;
|
||||
uint8_t * outat=out->ptr;
|
||||
uint8_t * outend=out->ptr+out->len;
|
||||
|
||||
while (patchat<patchend)
|
||||
while (patch.remaining() > 12)
|
||||
{
|
||||
size_t skip;
|
||||
decodeto(skip);
|
||||
size_t skip_fast = min(skip, outlen-out.size(), in.remaining());
|
||||
out.write(in.bytes(skip_fast));
|
||||
skip -= skip_fast;
|
||||
while (skip>0)
|
||||
{
|
||||
uint8_t out;
|
||||
if (inat>=inend) out=0;
|
||||
else out=readin8();
|
||||
if (outat<outend) writeout8(out);
|
||||
uint8_t outb = in.u8_or(0);
|
||||
if (out.size()<outlen) out.write(outb);
|
||||
skip--;
|
||||
}
|
||||
uint8_t tmp;
|
||||
do
|
||||
{
|
||||
tmp=readpatch8();
|
||||
uint8_t out;
|
||||
if (inat>=inend) out=0;
|
||||
else out=readin8();
|
||||
if (outat<outend) writeout8(out^tmp);
|
||||
tmp=patch.u8();
|
||||
uint8_t outb = in.u8_or(0);
|
||||
if (out.size()<outlen) out.write(outb^tmp);
|
||||
else if (outb != 0) error(e_broken);
|
||||
}
|
||||
while (tmp);
|
||||
}
|
||||
if (patchat!=patchend) error(e_broken);
|
||||
while (outat<outend) writeout8(0);
|
||||
while (inat<inend) (void)readin8();
|
||||
if (patch.remaining()!=12) error(e_broken);
|
||||
|
||||
uint32_t crc_in_expected=read32(patchat);
|
||||
uint32_t crc_out_expected=read32(patchat+4);
|
||||
uint32_t crc_patch_expected=read32(patchat+8);
|
||||
uint32_t crc_in=crc32(inmem);
|
||||
uint32_t crc_out=crc32(outmem);
|
||||
uint32_t crc_patch=crc32(patchmem.slice(0, patchmem.size()-4));
|
||||
|
||||
uint32_t crc_in=crc32(in.v());
|
||||
uint32_t crc_out=crc32(out->v());
|
||||
uint32_t crc_patch=crc32(patch.v().slice(0, patch.len-4));
|
||||
uint32_t crc_in_expected=patch.u32();
|
||||
uint32_t crc_out_expected=patch.u32();
|
||||
uint32_t crc_patch_expected=patch.u32();
|
||||
|
||||
if (inlen==outlen)
|
||||
{
|
||||
|
|
@ -144,23 +104,16 @@ result apply(const file& patch_, const file& source_, file& target_)
|
|||
}
|
||||
if (crc_patch!=crc_patch_expected) error(e_broken);
|
||||
|
||||
target_.write(out->v());
|
||||
free(out->ptr);
|
||||
patch_.unmap(patch.v());
|
||||
source_.unmap(in.v());
|
||||
patch_.unmap(patchmem);
|
||||
source_.unmap(inmem);
|
||||
target_.write(outmem);
|
||||
return e_ok;
|
||||
#undef read8
|
||||
#undef decodeto
|
||||
#undef write8
|
||||
}
|
||||
|
||||
exit:
|
||||
|
||||
free(out->ptr);
|
||||
patch_.unmap(patch.v());
|
||||
source_.unmap(in.v());
|
||||
out->len=0;
|
||||
out->ptr=NULL;
|
||||
patch_.unmap(patchmem);
|
||||
source_.unmap(inmem);
|
||||
return error;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user