- made all FileReader implementations 64 bit capable.
This commit is contained in:
Christoph Oelckers
parent
139d1a7eb6
commit
4fd5f00c4b
5 changed files with 117 additions and 97 deletions
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@ -53,6 +53,10 @@ FILE *myfopen(const char *filename, const char *flags)
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#endif
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}
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#ifdef _WIN32
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#define fseek _fseeki64
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#define ftell _ftelli64
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#endif
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//==========================================================================
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//
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@ -65,8 +69,8 @@ FILE *myfopen(const char *filename, const char *flags)
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class StdFileReader : public FileReaderInterface
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{
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FILE *File = nullptr;
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long StartPos = 0;
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long FilePos = 0;
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ptrdiff_t StartPos = 0;
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ptrdiff_t FilePos = 0;
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public:
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StdFileReader()
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@ -81,7 +85,7 @@ public:
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File = nullptr;
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}
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bool Open(const char *filename, long startpos = 0, long len = -1)
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bool Open(const char *filename, ptrdiff_t startpos = 0, ptrdiff_t len = -1)
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{
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File = myfopen(filename, "rb");
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if (File == nullptr) return false;
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@ -93,12 +97,12 @@ public:
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return true;
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}
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long Tell() const override
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ptrdiff_t Tell() const override
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{
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return FilePos - StartPos;
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}
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long Seek(long offset, int origin) override
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ptrdiff_t Seek(ptrdiff_t offset, int origin) override
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{
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if (origin == SEEK_SET)
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{
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@ -122,7 +126,7 @@ public:
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return -1;
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}
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long Read(void *buffer, long len) override
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ptrdiff_t Read(void *buffer, ptrdiff_t len) override
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{
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assert(len >= 0);
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if (len <= 0) return 0;
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@ -130,16 +134,16 @@ public:
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{
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len = Length - FilePos + StartPos;
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}
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len = (long)fread(buffer, 1, len, File);
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len = fread(buffer, 1, len, File);
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FilePos += len;
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return len;
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}
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char *Gets(char *strbuf, int len) override
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char *Gets(char *strbuf, ptrdiff_t len) override
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{
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if (len <= 0 || FilePos >= StartPos + Length) return NULL;
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if (len <= 0 || len > 0x7fffffff || FilePos >= StartPos + Length) return nullptr;
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char *p = fgets(strbuf, len, File);
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if (p != NULL)
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if (p != nullptr)
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{
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int old = FilePos;
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FilePos = ftell(File);
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@ -152,9 +156,9 @@ public:
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}
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private:
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long CalcFileLen() const
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ptrdiff_t CalcFileLen() const
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{
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long endpos;
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ptrdiff_t endpos;
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fseek(File, 0, SEEK_END);
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endpos = ftell(File);
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@ -174,11 +178,11 @@ private:
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class FileReaderRedirect : public FileReaderInterface
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{
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FileReader *mReader = nullptr;
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long StartPos = 0;
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long FilePos = 0;
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ptrdiff_t StartPos = 0;
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ptrdiff_t FilePos = 0;
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public:
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FileReaderRedirect(FileReader &parent, long start, long length)
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FileReaderRedirect(FileReader &parent, ptrdiff_t start, ptrdiff_t length)
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{
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mReader = &parent;
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FilePos = start;
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@ -187,12 +191,12 @@ public:
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Seek(0, SEEK_SET);
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}
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virtual long Tell() const override
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virtual ptrdiff_t Tell() const override
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{
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return FilePos - StartPos;
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}
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virtual long Seek(long offset, int origin) override
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virtual ptrdiff_t Seek(ptrdiff_t offset, int origin) override
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{
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switch (origin)
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{
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@ -205,7 +209,7 @@ public:
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break;
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case SEEK_CUR:
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offset += (long)mReader->Tell();
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offset += mReader->Tell();
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break;
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}
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if (offset < StartPos || offset > StartPos + Length) return -1; // out of scope
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@ -217,7 +221,7 @@ public:
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return -1;
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}
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virtual long Read(void *buffer, long len) override
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virtual ptrdiff_t Read(void *buffer, ptrdiff_t len) override
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{
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assert(len >= 0);
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if (len <= 0) return 0;
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@ -225,19 +229,19 @@ public:
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{
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len = Length - FilePos + StartPos;
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}
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len = (long)mReader->Read(buffer, len);
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len = mReader->Read(buffer, len);
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FilePos += len;
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return len;
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}
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virtual char *Gets(char *strbuf, int len) override
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virtual char *Gets(char *strbuf, ptrdiff_t len) override
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{
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if (len <= 0 || FilePos >= StartPos + Length) return NULL;
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if (len <= 0 || FilePos >= StartPos + Length) return nullptr;
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char *p = mReader->Gets(strbuf, len);
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if (p != NULL)
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if (p != nullptr)
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{
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int old = FilePos;
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FilePos = (long)mReader->Tell();
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FilePos = mReader->Tell();
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if (FilePos - StartPos > Length)
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{
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strbuf[Length - old + StartPos] = 0;
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@ -256,12 +260,12 @@ public:
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//
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//==========================================================================
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long MemoryReader::Tell() const
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ptrdiff_t MemoryReader::Tell() const
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{
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return FilePos;
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}
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long MemoryReader::Seek(long offset, int origin)
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ptrdiff_t MemoryReader::Seek(ptrdiff_t offset, int origin)
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{
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switch (origin)
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{
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@ -275,11 +279,11 @@ long MemoryReader::Seek(long offset, int origin)
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}
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if (offset < 0 || offset > Length) return -1;
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FilePos = std::clamp<long>(offset, 0, Length);
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FilePos = std::clamp<ptrdiff_t>(offset, 0, Length);
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return 0;
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}
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long MemoryReader::Read(void *buffer, long len)
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ptrdiff_t MemoryReader::Read(void *buffer, ptrdiff_t len)
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{
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if (len>Length - FilePos) len = Length - FilePos;
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if (len<0) len = 0;
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@ -288,10 +292,10 @@ long MemoryReader::Read(void *buffer, long len)
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return len;
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}
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char *MemoryReader::Gets(char *strbuf, int len)
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char *MemoryReader::Gets(char *strbuf, ptrdiff_t len)
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{
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if (len>Length - FilePos) len = Length - FilePos;
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if (len <= 0) return NULL;
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if (len <= 0) return nullptr;
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char *p = strbuf;
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while (len > 1)
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@ -313,7 +317,7 @@ char *MemoryReader::Gets(char *strbuf, int len)
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}
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FilePos++;
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}
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if (p == strbuf) return NULL;
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if (p == strbuf) return nullptr;
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*p++ = 0;
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return strbuf;
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}
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@ -331,7 +335,7 @@ class MemoryArrayReader : public MemoryReader
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std::vector<uint8_t> buf;
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public:
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MemoryArrayReader(const char *buffer, long length)
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MemoryArrayReader(const char *buffer, ptrdiff_t length)
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{
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if (length > 0)
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{
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@ -347,7 +351,7 @@ public:
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{
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bufptr = (const char*)buf.data();
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FilePos = 0;
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Length = (long)buf.size();
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Length = buf.size();
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}
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};
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@ -364,7 +368,7 @@ public:
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bool FileReader::OpenFile(const char *filename, FileReader::Size start, FileReader::Size length)
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{
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auto reader = new StdFileReader;
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if (!reader->Open(filename, (long)start, (long)length))
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if (!reader->Open(filename, start, length))
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{
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delete reader;
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return false;
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@ -376,7 +380,7 @@ bool FileReader::OpenFile(const char *filename, FileReader::Size start, FileRead
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bool FileReader::OpenFilePart(FileReader &parent, FileReader::Size start, FileReader::Size length)
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{
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auto reader = new FileReaderRedirect(parent, (long)start, (long)length);
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auto reader = new FileReaderRedirect(parent, start, length);
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Close();
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mReader = reader;
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return true;
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@ -385,14 +389,14 @@ bool FileReader::OpenFilePart(FileReader &parent, FileReader::Size start, FileRe
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bool FileReader::OpenMemory(const void *mem, FileReader::Size length)
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{
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Close();
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mReader = new MemoryReader((const char *)mem, (long)length);
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mReader = new MemoryReader((const char *)mem, length);
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return true;
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}
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bool FileReader::OpenMemoryArray(const void *mem, FileReader::Size length)
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{
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Close();
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mReader = new MemoryArrayReader((const char *)mem, (long)length);
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mReader = new MemoryArrayReader((const char *)mem, length);
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return true;
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}
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@ -424,7 +428,7 @@ bool FileReader::OpenMemoryArray(std::function<bool(std::vector<uint8_t>&)> gett
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bool FileWriter::OpenDirect(const char *filename)
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{
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File = myfopen(filename, "wb");
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return (File != NULL);
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return (File != nullptr);
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}
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FileWriter *FileWriter::Open(const char *filename)
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@ -435,12 +439,12 @@ FileWriter *FileWriter::Open(const char *filename)
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return fwrit;
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}
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delete fwrit;
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return NULL;
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return nullptr;
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}
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size_t FileWriter::Write(const void *buffer, size_t len)
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{
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if (File != NULL)
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if (File != nullptr)
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{
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return fwrite(buffer, 1, len, File);
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}
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@ -450,9 +454,9 @@ size_t FileWriter::Write(const void *buffer, size_t len)
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}
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}
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long FileWriter::Tell()
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ptrdiff_t FileWriter::Tell()
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{
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if (File != NULL)
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if (File != nullptr)
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{
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return ftell(File);
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}
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@ -462,9 +466,9 @@ long FileWriter::Tell()
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}
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}
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long FileWriter::Seek(long offset, int mode)
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ptrdiff_t FileWriter::Seek(ptrdiff_t offset, int mode)
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{
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if (File != NULL)
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if (File != nullptr)
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{
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return fseek(File, offset, mode);
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}
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@ -485,7 +489,7 @@ size_t FileWriter::Printf(const char *fmt, ...)
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va_start(arglist, fmt);
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vsnprintf(&buf.front(), n + 1, fmt, arglist);
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va_end(arglist);
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return Write(buf.c_str(), strlen(buf.c_str())); // Make sure we write no null bytes.
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return Write(buf.c_str(), strlen(buf.c_str())); // Make sure we write no nullptr bytes.
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}
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size_t BufferWriter::Write(const void *buffer, size_t len)
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