75bf97b575
59e63bc minor 6233050 ok 14477f9 add namenode 75a6d34 add libhdfs opts e3c76bf minmum fix 8b3c435 chg 2035799 test code 7751b2b add debug 7690313 ok bd346b4 ok faba1dc add testload 6f7783e add testload e5f0340 ok 3ed9ec8 chg e552ac4 ask for more ram in am b2505e3 only stop nm when sucess bc696c9 add queue info f3e867e add option queue 5dc843c refactor fileio cd9c81b quick fix 1e23af2 add virtual destructor to iseekstream f165ffb fix hdfs 8cc6508 allow demo to pass in env fad4d69 ok 0fd6197 fix more 7423837 fix more d25de54 add temporal solution, run_yarn_prog.py e5a9e31 final attempt ed3bee8 add command back 0774000 add hdfs to resource 9b66e7e fix hadoop 6812f14 ok 08e1c16 change hadoop prefix back to hadoop home d6b6828 Update build.sh 146e069 bugfix: logical boundary for ring buffer 19cb685 ok 4cf3c13 Merge branch 'master' of ssh://github.com/tqchen/rabit 20daddb add tracker c57dad8 add ringbased passing and batch schedule 295d8a1 update 994cb02 add sge 014c866 OK git-subtree-dir: subtree/rabit git-subtree-split: 59e63bc1354c9ff516d72d9a6468f6c431627202
113 lines
2.9 KiB
C++
113 lines
2.9 KiB
C++
#ifndef RABIT_LEARN_IO_FILE_INL_H_
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#define RABIT_LEARN_IO_FILE_INL_H_
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/*!
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* \file file-inl.h
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* \brief normal filesystem I/O
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* \author Tianqi Chen
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*/
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#include <string>
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#include <vector>
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#include <cstdio>
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#include "./io.h"
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#include "./line_split-inl.h"
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/*! \brief io interface */
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namespace rabit {
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namespace io {
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/*! \brief implementation of file i/o stream */
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class FileStream : public utils::ISeekStream {
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public:
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explicit FileStream(const char *fname, const char *mode)
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: use_stdio(false) {
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using namespace std;
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#ifndef RABIT_STRICT_CXX98_
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if (!strcmp(fname, "stdin")) {
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use_stdio = true; fp = stdin;
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}
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if (!strcmp(fname, "stdout")) {
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use_stdio = true; fp = stdout;
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}
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#endif
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if (!strncmp(fname, "file://", 7)) fname += 7;
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if (!use_stdio) {
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std::string flag = mode;
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if (flag == "w") flag = "wb";
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if (flag == "r") flag = "rb";
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fp = utils::FopenCheck(fname, flag.c_str());
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}
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}
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virtual ~FileStream(void) {
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this->Close();
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}
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virtual size_t Read(void *ptr, size_t size) {
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return std::fread(ptr, 1, size, fp);
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}
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virtual void Write(const void *ptr, size_t size) {
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std::fwrite(ptr, size, 1, fp);
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}
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virtual void Seek(size_t pos) {
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std::fseek(fp, static_cast<long>(pos), SEEK_SET);
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}
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virtual size_t Tell(void) {
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return std::ftell(fp);
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}
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virtual bool AtEnd(void) const {
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return std::feof(fp) != 0;
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}
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inline void Close(void) {
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if (fp != NULL && !use_stdio) {
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std::fclose(fp); fp = NULL;
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}
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}
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private:
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std::FILE *fp;
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bool use_stdio;
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};
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/*! \brief line split from normal file system */
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class FileProvider : public LineSplitter::IFileProvider {
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public:
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explicit FileProvider(const char *uri) {
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LineSplitter::SplitNames(&fnames_, uri, "#");
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std::vector<size_t> fsize;
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for (size_t i = 0; i < fnames_.size(); ++i) {
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if (!std::strncmp(fnames_[i].c_str(), "file://", 7)) {
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std::string tmp = fnames_[i].c_str() + 7;
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fnames_[i] = tmp;
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}
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size_t fz = GetFileSize(fnames_[i].c_str());
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if (fz != 0) {
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fsize_.push_back(fz);
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}
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}
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}
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// destrucor
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virtual ~FileProvider(void) {}
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virtual utils::ISeekStream *Open(size_t file_index) {
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utils::Assert(file_index < fnames_.size(), "file index exceed bound");
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return new FileStream(fnames_[file_index].c_str(), "rb");
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}
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virtual const std::vector<size_t> &FileSize(void) const {
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return fsize_;
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}
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private:
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// file sizes
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std::vector<size_t> fsize_;
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// file names
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std::vector<std::string> fnames_;
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// get file size
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inline static size_t GetFileSize(const char *fname) {
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std::FILE *fp = utils::FopenCheck(fname, "rb");
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// NOTE: fseek may not be good, but serves as ok solution
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std::fseek(fp, 0, SEEK_END);
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size_t fsize = static_cast<size_t>(std::ftell(fp));
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std::fclose(fp);
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return fsize;
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}
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};
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} // namespace io
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} // namespace rabit
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#endif // RABIT_LEARN_IO_FILE_INL_H_
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