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src/base/io-funcs-inl.h
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// base/io-funcs-inl.h
// Copyright 2009-2011 Microsoft Corporation; Saarland University;
// Jan Silovsky; Yanmin Qian;
// Johns Hopkins University (Author: Daniel Povey)
// 2016 Xiaohui Zhang
// See ../../COPYING for clarification regarding multiple authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.
#ifndef KALDI_BASE_IO_FUNCS_INL_H_
#define KALDI_BASE_IO_FUNCS_INL_H_ 1
// Do not include this file directly. It is included by base/io-funcs.h
#include <limits>
#include <vector>
namespace kaldi {
// Template that covers integers.
template<class T> void WriteBasicType(std::ostream &os,
bool binary, T t) {
// Compile time assertion that this is not called with a wrong type.
KALDI_ASSERT_IS_INTEGER_TYPE(T);
if (binary) {
char len_c = (std::numeric_limits<T>::is_signed ? 1 : -1)
* static_cast<char>(sizeof(t));
os.put(len_c);
os.write(reinterpret_cast<const char *>(&t), sizeof(t));
} else {
if (sizeof(t) == 1)
os << static_cast<int16>(t) << " ";
else
os << t << " ";
}
if (os.fail()) {
KALDI_ERR << "Write failure in WriteBasicType.";
}
}
// Template that covers integers.
template<class T> inline void ReadBasicType(std::istream &is,
bool binary, T *t) {
KALDI_PARANOID_ASSERT(t != NULL);
// Compile time assertion that this is not called with a wrong type.
KALDI_ASSERT_IS_INTEGER_TYPE(T);
if (binary) {
int len_c_in = is.get();
if (len_c_in == -1)
KALDI_ERR << "ReadBasicType: encountered end of stream.";
char len_c = static_cast<char>(len_c_in), len_c_expected
= (std::numeric_limits<T>::is_signed ? 1 : -1)
* static_cast<char>(sizeof(*t));
if (len_c != len_c_expected) {
KALDI_ERR << "ReadBasicType: did not get expected integer type, "
<< static_cast<int>(len_c)
<< " vs. " << static_cast<int>(len_c_expected)
<< ". You can change this code to successfully"
<< " read it later, if needed.";
// insert code here to read "wrong" type. Might have a switch statement.
}
is.read(reinterpret_cast<char *>(t), sizeof(*t));
} else {
if (sizeof(*t) == 1) {
int16 i;
is >> i;
*t = i;
} else {
is >> *t;
}
}
if (is.fail()) {
KALDI_ERR << "Read failure in ReadBasicType, file position is "
<< is.tellg() << ", next char is " << is.peek();
}
}
// Template that covers integers.
template<class T>
inline void WriteIntegerPairVector(std::ostream &os, bool binary,
const std::vector<std::pair<T, T> > &v) {
// Compile time assertion that this is not called with a wrong type.
KALDI_ASSERT_IS_INTEGER_TYPE(T);
if (binary) {
char sz = sizeof(T); // this is currently just a check.
os.write(&sz, 1);
int32 vecsz = static_cast<int32>(v.size());
KALDI_ASSERT((size_t)vecsz == v.size());
os.write(reinterpret_cast<const char *>(&vecsz), sizeof(vecsz));
if (vecsz != 0) {
os.write(reinterpret_cast<const char *>(&(v[0])), sizeof(T) * vecsz * 2);
}
} else {
// focus here is on prettiness of text form rather than
// efficiency of reading-in.
// reading-in is dominated by low-level operations anyway:
// for efficiency use binary.
os << "[ ";
typename std::vector<std::pair<T, T> >::const_iterator iter = v.begin(),
end = v.end();
for (; iter != end; ++iter) {
if (sizeof(T) == 1)
os << static_cast<int16>(iter->first) << ','
<< static_cast<int16>(iter->second) << ' ';
else
os << iter->first << ','
<< iter->second << ' ';
}
os << "]
";
}
if (os.fail()) {
KALDI_ERR << "Write failure in WriteIntegerPairVector.";
}
}
// Template that covers integers.
template<class T>
inline void ReadIntegerPairVector(std::istream &is, bool binary,
std::vector<std::pair<T, T> > *v) {
KALDI_ASSERT_IS_INTEGER_TYPE(T);
KALDI_ASSERT(v != NULL);
if (binary) {
int sz = is.peek();
if (sz == sizeof(T)) {
is.get();
} else { // this is currently just a check.
KALDI_ERR << "ReadIntegerPairVector: expected to see type of size "
<< sizeof(T) << ", saw instead " << sz << ", at file position "
<< is.tellg();
}
int32 vecsz;
is.read(reinterpret_cast<char *>(&vecsz), sizeof(vecsz));
if (is.fail() || vecsz < 0) goto bad;
v->resize(vecsz);
if (vecsz > 0) {
is.read(reinterpret_cast<char *>(&((*v)[0])), sizeof(T)*vecsz*2);
}
} else {
std::vector<std::pair<T, T> > tmp_v; // use temporary so v doesn't use extra memory
// due to resizing.
is >> std::ws;
if (is.peek() != static_cast<int>('[')) {
KALDI_ERR << "ReadIntegerPairVector: expected to see [, saw "
<< is.peek() << ", at file position " << is.tellg();
}
is.get(); // consume the '['.
is >> std::ws; // consume whitespace.
while (is.peek() != static_cast<int>(']')) {
if (sizeof(T) == 1) { // read/write chars as numbers.
int16 next_t1, next_t2;
is >> next_t1;
if (is.fail()) goto bad;
if (is.peek() != static_cast<int>(','))
KALDI_ERR << "ReadIntegerPairVector: expected to see ',', saw "
<< is.peek() << ", at file position " << is.tellg();
is.get(); // consume the ','.
is >> next_t2 >> std::ws;
if (is.fail()) goto bad;
else
tmp_v.push_back(std::make_pair<T, T>((T)next_t1, (T)next_t2));
} else {
T next_t1, next_t2;
is >> next_t1;
if (is.fail()) goto bad;
if (is.peek() != static_cast<int>(','))
KALDI_ERR << "ReadIntegerPairVector: expected to see ',', saw "
<< is.peek() << ", at file position " << is.tellg();
is.get(); // consume the ','.
is >> next_t2 >> std::ws;
if (is.fail()) goto bad;
else
tmp_v.push_back(std::pair<T, T>(next_t1, next_t2));
}
}
is.get(); // get the final ']'.
*v = tmp_v; // could use std::swap to use less temporary memory, but this
// uses less permanent memory.
}
if (!is.fail()) return;
bad:
KALDI_ERR << "ReadIntegerPairVector: read failure at file position "
<< is.tellg();
}
template<class T> inline void WriteIntegerVector(std::ostream &os, bool binary,
const std::vector<T> &v) {
// Compile time assertion that this is not called with a wrong type.
KALDI_ASSERT_IS_INTEGER_TYPE(T);
if (binary) {
char sz = sizeof(T); // this is currently just a check.
os.write(&sz, 1);
int32 vecsz = static_cast<int32>(v.size());
KALDI_ASSERT((size_t)vecsz == v.size());
os.write(reinterpret_cast<const char *>(&vecsz), sizeof(vecsz));
if (vecsz != 0) {
os.write(reinterpret_cast<const char *>(&(v[0])), sizeof(T)*vecsz);
}
} else {
// focus here is on prettiness of text form rather than
// efficiency of reading-in.
// reading-in is dominated by low-level operations anyway:
// for efficiency use binary.
os << "[ ";
typename std::vector<T>::const_iterator iter = v.begin(), end = v.end();
for (; iter != end; ++iter) {
if (sizeof(T) == 1)
os << static_cast<int16>(*iter) << " ";
else
os << *iter << " ";
}
os << "]
";
}
if (os.fail()) {
KALDI_ERR << "Write failure in WriteIntegerVector.";
}
}
template<class T> inline void ReadIntegerVector(std::istream &is,
bool binary,
std::vector<T> *v) {
KALDI_ASSERT_IS_INTEGER_TYPE(T);
KALDI_ASSERT(v != NULL);
if (binary) {
int sz = is.peek();
if (sz == sizeof(T)) {
is.get();
} else { // this is currently just a check.
KALDI_ERR << "ReadIntegerVector: expected to see type of size "
<< sizeof(T) << ", saw instead " << sz << ", at file position "
<< is.tellg();
}
int32 vecsz;
is.read(reinterpret_cast<char *>(&vecsz), sizeof(vecsz));
if (is.fail() || vecsz < 0) goto bad;
v->resize(vecsz);
if (vecsz > 0) {
is.read(reinterpret_cast<char *>(&((*v)[0])), sizeof(T)*vecsz);
}
} else {
std::vector<T> tmp_v; // use temporary so v doesn't use extra memory
// due to resizing.
is >> std::ws;
if (is.peek() != static_cast<int>('[')) {
KALDI_ERR << "ReadIntegerVector: expected to see [, saw "
<< is.peek() << ", at file position " << is.tellg();
}
is.get(); // consume the '['.
is >> std::ws; // consume whitespace.
while (is.peek() != static_cast<int>(']')) {
if (sizeof(T) == 1) { // read/write chars as numbers.
int16 next_t;
is >> next_t >> std::ws;
if (is.fail()) goto bad;
else
tmp_v.push_back((T)next_t);
} else {
T next_t;
is >> next_t >> std::ws;
if (is.fail()) goto bad;
else
tmp_v.push_back(next_t);
}
}
is.get(); // get the final ']'.
*v = tmp_v; // could use std::swap to use less temporary memory, but this
// uses less permanent memory.
}
if (!is.fail()) return;
bad:
KALDI_ERR << "ReadIntegerVector: read failure at file position "
<< is.tellg();
}
// Initialize an opened stream for writing by writing an optional binary
// header and modifying the floating-point precision.
inline void InitKaldiOutputStream(std::ostream &os, bool binary) {
// This does not throw exceptions (does not check for errors).
if (binary) {
os.put('\0');
os.put('B');
}
// Note, in non-binary mode we may at some point want to mess with
// the precision a bit.
// 7 is a bit more than the precision of float..
if (os.precision() < 7)
os.precision(7);
}
/// Initialize an opened stream for reading by detecting the binary header and
// setting the "binary" value appropriately.
inline bool InitKaldiInputStream(std::istream &is, bool *binary) {
// Sets the 'binary' variable.
// Throws exception in the very unusual situation that stream
// starts with '\0' but not then 'B'.
if (is.peek() == '\0') { // seems to be binary
is.get();
if (is.peek() != 'B') {
return false;
}
is.get();
*binary = true;
return true;
} else {
*binary = false;
return true;
}
}
} // end namespace kaldi.
#endif // KALDI_BASE_IO_FUNCS_INL_H_
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