From 83cae8bd92a2ebffcf2b8b4d2500766da008fe3d Mon Sep 17 00:00:00 2001 From: Kenneth Heafield Date: Wed, 21 Sep 2011 18:23:50 -0400 Subject: Updated kenlm. Includes left state support but not the cdec-side use of it. Updated binary format. --- klm/util/bit_packing.hh | 14 +++ klm/util/exception.cc | 5 + klm/util/exception.hh | 6 ++ klm/util/file.cc | 74 +++++++++++++ klm/util/file.hh | 74 +++++++++++++ klm/util/file_piece.cc | 18 +--- klm/util/file_piece.hh | 14 +-- klm/util/mmap.cc | 18 +--- klm/util/mmap.hh | 4 +- klm/util/murmur_hash.cc | 258 ++++++++++++++++++++++----------------------- klm/util/scoped.cc | 24 ----- klm/util/scoped.hh | 58 ++++------ klm/util/sized_iterator.hh | 107 +++++++++++++++++++ klm/util/tokenize_piece.hh | 69 ++++++++++++ 14 files changed, 504 insertions(+), 239 deletions(-) create mode 100644 klm/util/file.cc create mode 100644 klm/util/file.hh delete mode 100644 klm/util/scoped.cc create mode 100644 klm/util/sized_iterator.hh create mode 100644 klm/util/tokenize_piece.hh (limited to 'klm/util') diff --git a/klm/util/bit_packing.hh b/klm/util/bit_packing.hh index 9f47d559..33266b94 100644 --- a/klm/util/bit_packing.hh +++ b/klm/util/bit_packing.hh @@ -86,6 +86,20 @@ inline void WriteFloat32(void *base, uint64_t bit_off, float value) { const uint32_t kSignBit = 0x80000000; +inline void SetSign(float &to) { + FloatEnc enc; + enc.f = to; + enc.i |= kSignBit; + to = enc.f; +} + +inline void UnsetSign(float &to) { + FloatEnc enc; + enc.f = to; + enc.i &= ~kSignBit; + to = enc.f; +} + inline float ReadNonPositiveFloat31(const void *base, uint64_t bit_off) { FloatEnc encoded; encoded.i = ReadOff(base, bit_off) >> BitPackShift(bit_off & 7, 31); diff --git a/klm/util/exception.cc b/klm/util/exception.cc index 62280970..96951495 100644 --- a/klm/util/exception.cc +++ b/klm/util/exception.cc @@ -79,4 +79,9 @@ ErrnoException::ErrnoException() throw() : errno_(errno) { ErrnoException::~ErrnoException() throw() {} +EndOfFileException::EndOfFileException() throw() { + *this << "End of file"; +} +EndOfFileException::~EndOfFileException() throw() {} + } // namespace util diff --git a/klm/util/exception.hh b/klm/util/exception.hh index 81675a57..6d6a37cb 100644 --- a/klm/util/exception.hh +++ b/klm/util/exception.hh @@ -105,6 +105,12 @@ class ErrnoException : public Exception { int errno_; }; +class EndOfFileException : public Exception { + public: + EndOfFileException() throw(); + ~EndOfFileException() throw(); +}; + } // namespace util #endif // UTIL_EXCEPTION__ diff --git a/klm/util/file.cc b/klm/util/file.cc new file mode 100644 index 00000000..d707568e --- /dev/null +++ b/klm/util/file.cc @@ -0,0 +1,74 @@ +#include "util/file.hh" + +#include "util/exception.hh" + +#include +#include +#include + +#include +#include +#include +#include +#include + +namespace util { + +scoped_fd::~scoped_fd() { + if (fd_ != -1 && close(fd_)) { + std::cerr << "Could not close file " << fd_ << std::endl; + std::abort(); + } +} + +scoped_FILE::~scoped_FILE() { + if (file_ && std::fclose(file_)) { + std::cerr << "Could not close file " << std::endl; + std::abort(); + } +} + +int OpenReadOrThrow(const char *name) { + int ret; + UTIL_THROW_IF(-1 == (ret = open(name, O_RDONLY)), ErrnoException, "while opening " << name); + return ret; +} + +int CreateOrThrow(const char *name) { + int ret; + UTIL_THROW_IF(-1 == (ret = open(name, O_CREAT | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR)), ErrnoException, "while creating " << name); + return ret; +} + +off_t SizeFile(int fd) { + struct stat sb; + if (fstat(fd, &sb) == -1 || (!sb.st_size && !S_ISREG(sb.st_mode))) return kBadSize; + return sb.st_size; +} + +void ReadOrThrow(int fd, void *to_void, std::size_t amount) { + uint8_t *to = static_cast(to_void); + while (amount) { + ssize_t ret = read(fd, to, amount); + if (ret == -1) UTIL_THROW(ErrnoException, "Reading " << amount << " from fd " << fd << " failed."); + if (ret == 0) UTIL_THROW(Exception, "Hit EOF in fd " << fd << " but there should be " << amount << " more bytes to read."); + amount -= ret; + to += ret; + } +} + +void WriteOrThrow(int fd, const void *data_void, std::size_t size) { + const uint8_t *data = static_cast(data_void); + while (size) { + ssize_t ret = write(fd, data, size); + if (ret < 1) UTIL_THROW(util::ErrnoException, "Write failed"); + data += ret; + size -= ret; + } +} + +void RemoveOrThrow(const char *name) { + UTIL_THROW_IF(std::remove(name), util::ErrnoException, "Could not remove " << name); +} + +} // namespace util diff --git a/klm/util/file.hh b/klm/util/file.hh new file mode 100644 index 00000000..d6cca41d --- /dev/null +++ b/klm/util/file.hh @@ -0,0 +1,74 @@ +#ifndef UTIL_FILE__ +#define UTIL_FILE__ + +#include +#include + +namespace util { + +class scoped_fd { + public: + scoped_fd() : fd_(-1) {} + + explicit scoped_fd(int fd) : fd_(fd) {} + + ~scoped_fd(); + + void reset(int to) { + scoped_fd other(fd_); + fd_ = to; + } + + int get() const { return fd_; } + + int operator*() const { return fd_; } + + int release() { + int ret = fd_; + fd_ = -1; + return ret; + } + + operator bool() { return fd_ != -1; } + + private: + int fd_; + + scoped_fd(const scoped_fd &); + scoped_fd &operator=(const scoped_fd &); +}; + +class scoped_FILE { + public: + explicit scoped_FILE(std::FILE *file = NULL) : file_(file) {} + + ~scoped_FILE(); + + std::FILE *get() { return file_; } + const std::FILE *get() const { return file_; } + + void reset(std::FILE *to = NULL) { + scoped_FILE other(file_); + file_ = to; + } + + private: + std::FILE *file_; +}; + +int OpenReadOrThrow(const char *name); + +int CreateOrThrow(const char *name); + +// Return value for SizeFile when it can't size properly. +const off_t kBadSize = -1; +off_t SizeFile(int fd); + +void ReadOrThrow(int fd, void *to, std::size_t size); +void WriteOrThrow(int fd, const void *data_void, std::size_t size); + +void RemoveOrThrow(const char *name); + +} // namespace util + +#endif // UTIL_FILE__ diff --git a/klm/util/file_piece.cc b/klm/util/file_piece.cc index cbe4234f..b57582a0 100644 --- a/klm/util/file_piece.cc +++ b/klm/util/file_piece.cc @@ -1,6 +1,7 @@ #include "util/file_piece.hh" #include "util/exception.hh" +#include "util/file.hh" #include #include @@ -21,11 +22,6 @@ namespace util { -EndOfFileException::EndOfFileException() throw() { - *this << "End of file"; -} -EndOfFileException::~EndOfFileException() throw() {} - ParseNumberException::ParseNumberException(StringPiece value) throw() { *this << "Could not parse \"" << value << "\" into a number"; } @@ -40,18 +36,6 @@ GZException::GZException(void *file) { // Sigh this is the only way I could come up with to do a _const_ bool. It has ' ', '\f', '\n', '\r', '\t', and '\v' (same as isspace on C locale). const bool kSpaces[256] = {0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; -int OpenReadOrThrow(const char *name) { - int ret; - UTIL_THROW_IF(-1 == (ret = open(name, O_RDONLY)), ErrnoException, "while opening " << name); - return ret; -} - -off_t SizeFile(int fd) { - struct stat sb; - if (fstat(fd, &sb) == -1 || (!sb.st_size && !S_ISREG(sb.st_mode))) return kBadSize; - return sb.st_size; -} - FilePiece::FilePiece(const char *name, std::ostream *show_progress, off_t min_buffer) : file_(OpenReadOrThrow(name)), total_size_(SizeFile(file_.get())), page_(sysconf(_SC_PAGE_SIZE)), progress_(total_size_ == kBadSize ? NULL : show_progress, std::string("Reading ") + name, total_size_) { diff --git a/klm/util/file_piece.hh b/klm/util/file_piece.hh index a5c00910..a627f38c 100644 --- a/klm/util/file_piece.hh +++ b/klm/util/file_piece.hh @@ -3,9 +3,9 @@ #include "util/ersatz_progress.hh" #include "util/exception.hh" +#include "util/file.hh" #include "util/have.hh" #include "util/mmap.hh" -#include "util/scoped.hh" #include "util/string_piece.hh" #include @@ -14,12 +14,6 @@ namespace util { -class EndOfFileException : public Exception { - public: - EndOfFileException() throw(); - ~EndOfFileException() throw(); -}; - class ParseNumberException : public Exception { public: explicit ParseNumberException(StringPiece value) throw(); @@ -33,14 +27,8 @@ class GZException : public Exception { ~GZException() throw() {} }; -int OpenReadOrThrow(const char *name); - extern const bool kSpaces[256]; -// Return value for SizeFile when it can't size properly. -const off_t kBadSize = -1; -off_t SizeFile(int fd); - // Memory backing the returned StringPiece may vanish on the next call. class FilePiece { public: diff --git a/klm/util/mmap.cc b/klm/util/mmap.cc index e7c0643b..5ce7adc9 100644 --- a/klm/util/mmap.cc +++ b/klm/util/mmap.cc @@ -1,6 +1,6 @@ #include "util/exception.hh" +#include "util/file.hh" #include "util/mmap.hh" -#include "util/scoped.hh" #include @@ -66,20 +66,6 @@ void *MapOrThrow(std::size_t size, bool for_write, int flags, bool prefault, int return ret; } -namespace { -void ReadAll(int fd, void *to_void, std::size_t amount) { - uint8_t *to = static_cast(to_void); - while (amount) { - ssize_t ret = read(fd, to, amount); - if (ret == -1) UTIL_THROW(ErrnoException, "Reading " << amount << " from fd " << fd << " failed."); - if (ret == 0) UTIL_THROW(Exception, "Hit EOF in fd " << fd << " but there should be " << amount << " more bytes to read."); - amount -= ret; - to += ret; - } -} - -} // namespace - const int kFileFlags = #ifdef MAP_FILE MAP_FILE | MAP_SHARED @@ -106,7 +92,7 @@ void MapRead(LoadMethod method, int fd, off_t offset, std::size_t size, scoped_m out.reset(malloc(size), size, scoped_memory::MALLOC_ALLOCATED); if (!out.get()) UTIL_THROW(util::ErrnoException, "Allocating " << size << " bytes with malloc"); if (-1 == lseek(fd, offset, SEEK_SET)) UTIL_THROW(ErrnoException, "lseek to " << offset << " in fd " << fd << " failed."); - ReadAll(fd, out.get(), size); + ReadOrThrow(fd, out.get(), size); break; } } diff --git a/klm/util/mmap.hh b/klm/util/mmap.hh index e4439fa4..b0eb6672 100644 --- a/klm/util/mmap.hh +++ b/klm/util/mmap.hh @@ -2,8 +2,6 @@ #define UTIL_MMAP__ // Utilities for mmaped files. -#include "util/scoped.hh" - #include #include @@ -11,6 +9,8 @@ namespace util { +class scoped_fd; + // (void*)-1 is MAP_FAILED; this is done to avoid including the mmap header here. class scoped_mmap { public: diff --git a/klm/util/murmur_hash.cc b/klm/util/murmur_hash.cc index fec47fd9..d58a0727 100644 --- a/klm/util/murmur_hash.cc +++ b/klm/util/murmur_hash.cc @@ -1,129 +1,129 @@ -/* Downloaded from http://sites.google.com/site/murmurhash/ which says "All - * code is released to the public domain. For business purposes, Murmurhash is - * under the MIT license." - * This is modified from the original: - * ULL tag on 0xc6a4a7935bd1e995 so this will compile on 32-bit. - * length changed to unsigned int. - * placed in namespace util - * add MurmurHashNative - * default option = 0 for seed - */ - -#include "util/murmur_hash.hh" - -namespace util { - -//----------------------------------------------------------------------------- -// MurmurHash2, 64-bit versions, by Austin Appleby - -// The same caveats as 32-bit MurmurHash2 apply here - beware of alignment -// and endian-ness issues if used across multiple platforms. - -// 64-bit hash for 64-bit platforms - -uint64_t MurmurHash64A ( const void * key, std::size_t len, unsigned int seed ) -{ - const uint64_t m = 0xc6a4a7935bd1e995ULL; - const int r = 47; - - uint64_t h = seed ^ (len * m); - - const uint64_t * data = (const uint64_t *)key; - const uint64_t * end = data + (len/8); - - while(data != end) - { - uint64_t k = *data++; - - k *= m; - k ^= k >> r; - k *= m; - - h ^= k; - h *= m; - } - - const unsigned char * data2 = (const unsigned char*)data; - - switch(len & 7) - { - case 7: h ^= uint64_t(data2[6]) << 48; - case 6: h ^= uint64_t(data2[5]) << 40; - case 5: h ^= uint64_t(data2[4]) << 32; - case 4: h ^= uint64_t(data2[3]) << 24; - case 3: h ^= uint64_t(data2[2]) << 16; - case 2: h ^= uint64_t(data2[1]) << 8; - case 1: h ^= uint64_t(data2[0]); - h *= m; - }; - - h ^= h >> r; - h *= m; - h ^= h >> r; - - return h; -} - - -// 64-bit hash for 32-bit platforms - -uint64_t MurmurHash64B ( const void * key, std::size_t len, unsigned int seed ) -{ - const unsigned int m = 0x5bd1e995; - const int r = 24; - - unsigned int h1 = seed ^ len; - unsigned int h2 = 0; - - const unsigned int * data = (const unsigned int *)key; - - while(len >= 8) - { - unsigned int k1 = *data++; - k1 *= m; k1 ^= k1 >> r; k1 *= m; - h1 *= m; h1 ^= k1; - len -= 4; - - unsigned int k2 = *data++; - k2 *= m; k2 ^= k2 >> r; k2 *= m; - h2 *= m; h2 ^= k2; - len -= 4; - } - - if(len >= 4) - { - unsigned int k1 = *data++; - k1 *= m; k1 ^= k1 >> r; k1 *= m; - h1 *= m; h1 ^= k1; - len -= 4; - } - - switch(len) - { - case 3: h2 ^= ((unsigned char*)data)[2] << 16; - case 2: h2 ^= ((unsigned char*)data)[1] << 8; - case 1: h2 ^= ((unsigned char*)data)[0]; - h2 *= m; - }; - - h1 ^= h2 >> 18; h1 *= m; - h2 ^= h1 >> 22; h2 *= m; - h1 ^= h2 >> 17; h1 *= m; - h2 ^= h1 >> 19; h2 *= m; - - uint64_t h = h1; - - h = (h << 32) | h2; - - return h; -} - -uint64_t MurmurHashNative(const void * key, std::size_t len, unsigned int seed) { - if (sizeof(int) == 4) { - return MurmurHash64B(key, len, seed); - } else { - return MurmurHash64A(key, len, seed); - } -} - -} // namespace util +/* Downloaded from http://sites.google.com/site/murmurhash/ which says "All + * code is released to the public domain. For business purposes, Murmurhash is + * under the MIT license." + * This is modified from the original: + * ULL tag on 0xc6a4a7935bd1e995 so this will compile on 32-bit. + * length changed to unsigned int. + * placed in namespace util + * add MurmurHashNative + * default option = 0 for seed + */ + +#include "util/murmur_hash.hh" + +namespace util { + +//----------------------------------------------------------------------------- +// MurmurHash2, 64-bit versions, by Austin Appleby + +// The same caveats as 32-bit MurmurHash2 apply here - beware of alignment +// and endian-ness issues if used across multiple platforms. + +// 64-bit hash for 64-bit platforms + +uint64_t MurmurHash64A ( const void * key, std::size_t len, unsigned int seed ) +{ + const uint64_t m = 0xc6a4a7935bd1e995ULL; + const int r = 47; + + uint64_t h = seed ^ (len * m); + + const uint64_t * data = (const uint64_t *)key; + const uint64_t * end = data + (len/8); + + while(data != end) + { + uint64_t k = *data++; + + k *= m; + k ^= k >> r; + k *= m; + + h ^= k; + h *= m; + } + + const unsigned char * data2 = (const unsigned char*)data; + + switch(len & 7) + { + case 7: h ^= uint64_t(data2[6]) << 48; + case 6: h ^= uint64_t(data2[5]) << 40; + case 5: h ^= uint64_t(data2[4]) << 32; + case 4: h ^= uint64_t(data2[3]) << 24; + case 3: h ^= uint64_t(data2[2]) << 16; + case 2: h ^= uint64_t(data2[1]) << 8; + case 1: h ^= uint64_t(data2[0]); + h *= m; + }; + + h ^= h >> r; + h *= m; + h ^= h >> r; + + return h; +} + + +// 64-bit hash for 32-bit platforms + +uint64_t MurmurHash64B ( const void * key, std::size_t len, unsigned int seed ) +{ + const unsigned int m = 0x5bd1e995; + const int r = 24; + + unsigned int h1 = seed ^ len; + unsigned int h2 = 0; + + const unsigned int * data = (const unsigned int *)key; + + while(len >= 8) + { + unsigned int k1 = *data++; + k1 *= m; k1 ^= k1 >> r; k1 *= m; + h1 *= m; h1 ^= k1; + len -= 4; + + unsigned int k2 = *data++; + k2 *= m; k2 ^= k2 >> r; k2 *= m; + h2 *= m; h2 ^= k2; + len -= 4; + } + + if(len >= 4) + { + unsigned int k1 = *data++; + k1 *= m; k1 ^= k1 >> r; k1 *= m; + h1 *= m; h1 ^= k1; + len -= 4; + } + + switch(len) + { + case 3: h2 ^= ((unsigned char*)data)[2] << 16; + case 2: h2 ^= ((unsigned char*)data)[1] << 8; + case 1: h2 ^= ((unsigned char*)data)[0]; + h2 *= m; + }; + + h1 ^= h2 >> 18; h1 *= m; + h2 ^= h1 >> 22; h2 *= m; + h1 ^= h2 >> 17; h1 *= m; + h2 ^= h1 >> 19; h2 *= m; + + uint64_t h = h1; + + h = (h << 32) | h2; + + return h; +} + +uint64_t MurmurHashNative(const void * key, std::size_t len, unsigned int seed) { + if (sizeof(int) == 4) { + return MurmurHash64B(key, len, seed); + } else { + return MurmurHash64A(key, len, seed); + } +} + +} // namespace util diff --git a/klm/util/scoped.cc b/klm/util/scoped.cc deleted file mode 100644 index a4cc5016..00000000 --- a/klm/util/scoped.cc +++ /dev/null @@ -1,24 +0,0 @@ -#include "util/scoped.hh" - -#include - -#include -#include - -namespace util { - -scoped_fd::~scoped_fd() { - if (fd_ != -1 && close(fd_)) { - std::cerr << "Could not close file " << fd_ << std::endl; - abort(); - } -} - -scoped_FILE::~scoped_FILE() { - if (file_ && fclose(file_)) { - std::cerr << "Could not close file " << std::endl; - abort(); - } -} - -} // namespace util diff --git a/klm/util/scoped.hh b/klm/util/scoped.hh index d36a7df3..12e6652b 100644 --- a/klm/util/scoped.hh +++ b/klm/util/scoped.hh @@ -1,10 +1,11 @@ #ifndef UTIL_SCOPED__ #define UTIL_SCOPED__ -/* Other scoped objects in the style of scoped_ptr. */ +#include "util/exception.hh" +/* Other scoped objects in the style of scoped_ptr. */ #include -#include +#include namespace util { @@ -34,52 +35,33 @@ template class scoped_thing { scoped_thing &operator=(const scoped_thing &); }; -class scoped_fd { +class scoped_malloc { public: - scoped_fd() : fd_(-1) {} + scoped_malloc() : p_(NULL) {} - explicit scoped_fd(int fd) : fd_(fd) {} + scoped_malloc(void *p) : p_(p) {} - ~scoped_fd(); + ~scoped_malloc() { std::free(p_); } - void reset(int to) { - scoped_fd other(fd_); - fd_ = to; + void reset(void *p = NULL) { + scoped_malloc other(p_); + p_ = p; } - int get() const { return fd_; } - - int operator*() const { return fd_; } - - int release() { - int ret = fd_; - fd_ = -1; - return ret; + void call_realloc(std::size_t to) { + void *ret; + UTIL_THROW_IF(!(ret = std::realloc(p_, to)), util::ErrnoException, "realloc to " << to << " bytes failed."); + p_ = ret; } - private: - int fd_; - - scoped_fd(const scoped_fd &); - scoped_fd &operator=(const scoped_fd &); -}; - -class scoped_FILE { - public: - explicit scoped_FILE(std::FILE *file = NULL) : file_(file) {} - - ~scoped_FILE(); - - std::FILE *get() { return file_; } - const std::FILE *get() const { return file_; } - - void reset(std::FILE *to = NULL) { - scoped_FILE other(file_); - file_ = to; - } + void *get() { return p_; } + const void *get() const { return p_; } private: - std::FILE *file_; + void *p_; + + scoped_malloc(const scoped_malloc &); + scoped_malloc &operator=(const scoped_malloc &); }; // Hat tip to boost. diff --git a/klm/util/sized_iterator.hh b/klm/util/sized_iterator.hh new file mode 100644 index 00000000..47dfc245 --- /dev/null +++ b/klm/util/sized_iterator.hh @@ -0,0 +1,107 @@ +#ifndef UTIL_SIZED_ITERATOR__ +#define UTIL_SIZED_ITERATOR__ + +#include "util/proxy_iterator.hh" + +#include +#include + +#include +#include + +namespace util { + +class SizedInnerIterator { + public: + SizedInnerIterator() {} + + SizedInnerIterator(void *ptr, std::size_t size) : ptr_(static_cast(ptr)), size_(size) {} + + bool operator==(const SizedInnerIterator &other) const { + return ptr_ == other.ptr_; + } + bool operator<(const SizedInnerIterator &other) const { + return ptr_ < other.ptr_; + } + SizedInnerIterator &operator+=(std::ptrdiff_t amount) { + ptr_ += amount * size_; + return *this; + } + std::ptrdiff_t operator-(const SizedInnerIterator &other) const { + return (ptr_ - other.ptr_) / size_; + } + + const void *Data() const { return ptr_; } + void *Data() { return ptr_; } + std::size_t EntrySize() const { return size_; } + + private: + uint8_t *ptr_; + std::size_t size_; +}; + +class SizedProxy { + public: + SizedProxy() {} + + SizedProxy(void *ptr, std::size_t size) : inner_(ptr, size) {} + + operator std::string() const { + return std::string(reinterpret_cast(inner_.Data()), inner_.EntrySize()); + } + + SizedProxy &operator=(const SizedProxy &from) { + memcpy(inner_.Data(), from.inner_.Data(), inner_.EntrySize()); + return *this; + } + + SizedProxy &operator=(const std::string &from) { + memcpy(inner_.Data(), from.data(), inner_.EntrySize()); + return *this; + } + + const void *Data() const { return inner_.Data(); } + void *Data() { return inner_.Data(); } + + private: + friend class util::ProxyIterator; + + typedef std::string value_type; + + typedef SizedInnerIterator InnerIterator; + + InnerIterator &Inner() { return inner_; } + const InnerIterator &Inner() const { return inner_; } + InnerIterator inner_; +}; + +typedef ProxyIterator SizedIterator; + +inline SizedIterator SizedIt(void *ptr, std::size_t size) { return SizedIterator(SizedProxy(ptr, size)); } + +// Useful wrapper for a comparison function i.e. sort. +template class SizedCompare : public std::binary_function { + public: + explicit SizedCompare(const Delegate &delegate = Delegate()) : delegate_(delegate) {} + + bool operator()(const Proxy &first, const Proxy &second) const { + return delegate_(first.Data(), second.Data()); + } + bool operator()(const Proxy &first, const std::string &second) const { + return delegate_(first.Data(), second.data()); + } + bool operator()(const std::string &first, const Proxy &second) const { + return delegate_(first.data(), second.Data()); + } + bool operator()(const std::string &first, const std::string &second) const { + return delegate_(first.data(), second.data()); + } + + const Delegate &GetDelegate() const { return delegate_; } + + private: + const Delegate delegate_; +}; + +} // namespace util +#endif // UTIL_SIZED_ITERATOR__ diff --git a/klm/util/tokenize_piece.hh b/klm/util/tokenize_piece.hh new file mode 100644 index 00000000..ee1c7ab2 --- /dev/null +++ b/klm/util/tokenize_piece.hh @@ -0,0 +1,69 @@ +#ifndef UTIL_TOKENIZE_PIECE__ +#define UTIL_TOKENIZE_PIECE__ + +#include "util/string_piece.hh" + +#include + +/* Usage: + * + * for (PieceIterator<' '> i(" foo \r\n bar "); i; ++i) { + * std::cout << *i << "\n"; + * } + * + */ + +namespace util { + +// Tokenize a StringPiece using an iterator interface. boost::tokenizer doesn't work with StringPiece. +template class PieceIterator : public boost::iterator_facade, const StringPiece, boost::forward_traversal_tag> { + public: + // Default construct is end, which is also accessed by kEndPieceIterator; + PieceIterator() {} + + explicit PieceIterator(const StringPiece &str) + : after_(str) { + increment(); + } + + bool operator!() const { + return after_.data() == 0; + } + operator bool() const { + return after_.data() != 0; + } + + static PieceIterator end() { + return PieceIterator(); + } + + private: + friend class boost::iterator_core_access; + + void increment() { + const char *start = after_.data(); + for (; (start != after_.data() + after_.size()) && (d == *start); ++start) {} + if (start == after_.data() + after_.size()) { + // End condition. + after_.clear(); + return; + } + const char *finish = start; + for (; (finish != after_.data() + after_.size()) && (d != *finish); ++finish) {} + current_ = StringPiece(start, finish - start); + after_ = StringPiece(finish, after_.data() + after_.size() - finish); + } + + bool equal(const PieceIterator &other) const { + return after_.data() == other.after_.data(); + } + + const StringPiece &dereference() const { return current_; } + + StringPiece current_; + StringPiece after_; +}; + +} // namespace util + +#endif // UTIL_TOKENIZE_PIECE__ -- cgit v1.2.3