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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/util/signalhandler.h>
#include <vespa/fastos/file.h>
#include <iomanip>
#include <iostream>
#include <vespa/vespalib/data/fileheader.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <unistd.h>
#include <vespa/log/log.h>
LOG_SETUP("vespa-fileheader-inspect");
using namespace vespalib;
class Application {
private:
vespalib::string _fileName;
char _delimiter;
bool _quiet;
int parseOpts(int argc, char **argv);
void usage(const char *self);
void printQuiet(FileHeader &header);
void printVerbose(FileHeader &header);
vespalib::string escape(const vespalib::string &str, char quote = '\0');
vespalib::string getTypeString(const FileHeader::Tag &tag);
vespalib::string getValueString(const FileHeader::Tag &tag);
public:
Application();
~Application();
int main(int argc, char **argv);
};
Application::Application() :
_fileName(""),
_delimiter(';'),
_quiet(false)
{ }
Application::~Application() {}
void
Application::usage(const char *self)
{
printf("Tool for inspecting the headers of files used by Vespa.\n");
printf("Usage: %s [options] filename\n", self);
printf("\n");
printf("The options are:\n");
printf("-d delimiter The delimiter to use to separate values in quiet output.\n");
printf("-f file The name of the file to inspect.\n");
printf("-q Enables machine readable output.\n");
printf("-h Shows this help page.\n");
}
int
Application::parseOpts(int argc, char **argv)
{
int c = '?';
while ((c = getopt(argc, argv, "d:f:qh")) != -1) {
switch (c) {
case 'd':
_delimiter = optarg[0];
break;
case 'f':
_fileName = optarg;
break;
case 'q':
_quiet = true;
break;
case 'h':
usage(argv[0]);
return EXIT_SUCCESS;
default:
usage(argv[0]);
return EXIT_FAILURE;
}
}
if (argc == optind + 1) {
_fileName = argv[optind];
}
if (_fileName.empty()) {
std::cerr << "No filename given." << std::endl;
return EXIT_FAILURE;
}
return ~(EXIT_SUCCESS | EXIT_FAILURE);
}
int
Application::main(int argc, char **argv)
{
int ret = parseOpts(argc, argv);
if (ret == EXIT_FAILURE || ret == EXIT_SUCCESS) {
return ret;
}
FastOS_File file;
if (!file.OpenReadOnly(_fileName.c_str())) {
std::cerr << "Failed to open file '" << _fileName << "'." << std::endl;
return EXIT_FAILURE;
}
FileHeader header;
try {
header.readFile(file);
} catch (IllegalHeaderException &e) {
std::cerr << e.getMessage() << std::endl;
return EXIT_FAILURE;
}
if (_quiet) {
printQuiet(header);
} else {
printVerbose(header);
}
return EXIT_SUCCESS;
}
void
Application::printQuiet(FileHeader &header)
{
for (uint32_t i = 0, len = header.getNumTags(); i < len; ++i) {
const FileHeader::Tag &tag = header.getTag(i);
std::cout << escape(tag.getName(), _delimiter) << _delimiter
<< escape(getTypeString(tag), _delimiter) << _delimiter
<< escape(getValueString(tag), _delimiter) << std::endl;
}
}
void
Application::printVerbose(FileHeader &header)
{
uint32_t nameWidth = 3, typeWidth = 4, valueWidth = 5;
for (uint32_t i = 0, len = header.getNumTags(); i < len; ++i) {
const FileHeader::Tag &tag = header.getTag(i);
nameWidth = std::max(nameWidth, (uint32_t)tag.getName().size());
typeWidth = std::max(typeWidth, (uint32_t)getTypeString(tag).size());
valueWidth = std::max(valueWidth, (uint32_t)getValueString(tag).size());
}
vespalib::asciistream line;
line << "+" << std::string(nameWidth + 2, '-')
<< "+" << std::string(typeWidth + 2, '-')
<< "+" << std::string(valueWidth + 2, '-')
<< "+";
std::cout << std::left << line.str() << std::endl;
std::cout << "| " << std::setw(nameWidth) << "Tag" << " "
<< "| " << std::setw(typeWidth) << "Type" << " "
<< "| " << std::setw(valueWidth)<< "Value" << " "
<< "| " << std::endl;
std::cout << line.str() << std::endl;
for (uint32_t i = 0, len = header.getNumTags(); i < len; ++i) {
const FileHeader::Tag &tag = header.getTag(i);
std::cout << "| " << std::setw(nameWidth) << escape(tag.getName()) << " "
<< "| " << std::setw(typeWidth) << getTypeString(tag) << " "
<< "| " << std::setw(valueWidth) << escape(getValueString(tag)) << " "
<< "| " << std::endl;
}
std::cout << line.str() << std::endl;
}
vespalib::string
Application::escape(const vespalib::string &str, char quote)
{
vespalib::string ret = "";
for (uint32_t i = 0, len = str.size(); i < len; ++i) {
char c = str[i];
switch (c) {
case '\f':
ret.append("\\f");
break;
case '\n':
ret.append("\\n");
break;
case '\r':
ret.append("\\r");
break;
case '\t':
ret.append("\\t");
break;
default:
if (c != '\0' && c == quote) {
ret.append("\\");
}
ret.push_back(c);
}
}
return ret;
}
vespalib::string
Application::getTypeString(const FileHeader::Tag &tag)
{
switch (tag.getType()) {
case FileHeader::Tag::TYPE_FLOAT:
return "float";
case FileHeader::Tag::TYPE_INTEGER:
return "integer";
case FileHeader::Tag::TYPE_STRING:
return "string";
default:
LOG_ASSERT(tag.getType() == FileHeader::Tag::TYPE_INTEGER);
LOG_ABORT("should not be reached");
}
}
vespalib::string
Application::getValueString(const FileHeader::Tag &tag)
{
vespalib::asciistream out;
out << tag;
return out.str();
}
int
main(int argc, char** argv)
{
vespalib::SignalHandler::PIPE.ignore();
Application app;
return app.main(argc, argv);
}
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