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//===-- CommandUtil.cpp ---------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "CommandUtil.h"
#include "llbuild/Commands/Commands.h"
#include "llbuild/Basic/LLVM.h"
#include "llbuild/Ninja/ManifestLoader.h"
#include "llbuild/Ninja/Parser.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <iostream>
using namespace llbuild;
using namespace llbuild::commands;
static std::string programName;
void commands::setProgramName(StringRef name) {
assert(programName.empty());
programName = name;
}
const char* commands::getProgramName() {
if (programName.empty())
return nullptr;
return programName.c_str();
}
static char hexdigit(unsigned input) {
return (input < 10) ? '0' + input : 'A' + input - 10;
}
std::string util::escapedString(StringRef str) {
std::string result;
llvm::raw_string_ostream resultStream(result);
for (unsigned i = 0; i < str.size(); ++i) {
char c = str[i];
if (c == '"') {
resultStream << "\\\"";
} else if (isprint(c)) {
resultStream << c;
} else if (c == '\n') {
resultStream << "\\n";
} else {
resultStream << "\\x"
<< hexdigit(((unsigned char) c >> 4) & 0xF)
<< hexdigit((unsigned char) c & 0xF);
}
}
resultStream.flush();
return result;
}
static void emitError(StringRef filename, StringRef message,
const char* position, unsigned length,
int line, int column,
StringRef buffer) {
assert(position >= buffer.begin() && position <= buffer.end() &&
"invalid position");
assert(position + length <= buffer.end() && "invalid length");
// Compute the line and column, if not provided.
//
// FIXME: This is not very efficient, if there are a lot of diagnostics.
if (line == -1) {
line = 1;
column = 0;
for (const char *c = buffer.begin(); c != position; ++c) {
if (*c == '\n') {
++line;
column = 0;
} else {
++column;
}
}
}
std::cerr.write(filename.data(), filename.size());
std::cerr << ":" << line << ":" << column << ": error: ";
std::cerr.write(message.data(), message.size());
std::cerr << "\n";
// Skip carat diagnostics on EOF token.
if (position == buffer.end())
return;
// Simple caret style diagnostics.
const char *lineBegin = position, *lineEnd = position;
const char *bufferBegin = buffer.begin(), *bufferEnd = buffer.end();
// Run line pointers forward and back.
while (lineBegin > bufferBegin &&
lineBegin[-1] != '\r' && lineBegin[-1] != '\n')
--lineBegin;
while (lineEnd < bufferEnd &&
lineEnd[0] != '\r' && lineEnd[0] != '\n')
++lineEnd;
// Show the line, indented by 2.
std::cerr << " " << std::string(lineBegin, lineEnd) << "\n";
// Show the caret or squiggly, making sure to print back spaces the same.
std::cerr << " ";
for (const char* s = lineBegin; s != position; ++s)
std::cerr << (isspace(*s) ? *s : ' ');
if (length > 1) {
for (unsigned i = 0; i != length; ++i)
std::cerr << '~';
} else {
std::cerr << '^';
}
std::cerr << '\n';
}
void util::emitError(StringRef filename, StringRef message,
const ninja::Token& at, const ninja::Parser* parser) {
::emitError(filename, message, at.start, at.length, at.line, at.column,
parser->getLexer().getBuffer());
}
void util::emitError(StringRef filename, StringRef message,
const char* position, unsigned length,
StringRef buffer) {
::emitError(filename, message, position, length, -1, -1, buffer);
}
llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>> util::readFileContents(
StringRef filename) {
SmallString<256> path(filename);
llvm::sys::fs::make_absolute(path);
auto bufferOrError = llvm::MemoryBuffer::getFile(path);
if (!bufferOrError) {
auto ec = bufferOrError.getError();
return llvm::make_error<llvm::StringError>(
Twine("unable to read input \"") + util::escapedString(path) +
"\" (" + ec.message() + ")", ec);
}
return std::move(*bufferOrError);
}
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