204 lines
3.9 KiB
C++
204 lines
3.9 KiB
C++
/*
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* Copyright 2007-2012, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Distributed under the terms of the MIT License.
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*/
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#include <ArgumentVector.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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#include <vector>
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struct ArgumentVector::Parser {
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ParseError Parse(const char* commandLine, const char*& _errorLocation)
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{
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// init temporary arg/argv storage
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fCurrentArg.clear();
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fCurrentArgStarted = false;
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fArgVector.clear();
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fTotalStringSize = 0;
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for (; *commandLine; commandLine++) {
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char c = *commandLine;
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// whitespace delimits args and is otherwise ignored
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if (isspace(c)) {
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_PushCurrentArg();
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continue;
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}
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const char* errorBase = commandLine;
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switch (c) {
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case '\'':
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// quoted string -- no quoting
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while (*++commandLine != '\'') {
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c = *commandLine;
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if (c == '\0') {
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_errorLocation = errorBase;
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return UNTERMINATED_QUOTED_STRING;
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}
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_PushCharacter(c);
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}
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break;
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case '"':
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// quoted string -- some quoting
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while (*++commandLine != '"') {
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c = *commandLine;
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if (c == '\0') {
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_errorLocation = errorBase;
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return UNTERMINATED_QUOTED_STRING;
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}
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if (c == '\\') {
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c = *++commandLine;
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if (c == '\0') {
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_errorLocation = errorBase;
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return UNTERMINATED_QUOTED_STRING;
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}
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// only '\' and '"' can be quoted, otherwise the
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// the '\' is treated as a normal char
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if (c != '\\' && c != '"')
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_PushCharacter('\\');
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}
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_PushCharacter(c);
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}
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break;
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case '\\':
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// quoted char
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c = *++commandLine;
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if (c == '\0') {
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_errorLocation = errorBase;
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return TRAILING_BACKSPACE;
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}
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_PushCharacter(c);
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break;
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default:
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// normal char
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_PushCharacter(c);
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break;
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}
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}
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// commit last arg
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_PushCurrentArg();
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return NO_ERROR;
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}
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const std::vector<std::string>& ArgVector() const
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{
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return fArgVector;
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}
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size_t TotalStringSize() const
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{
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return fTotalStringSize;
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}
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private:
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void _PushCurrentArg()
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{
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if (fCurrentArgStarted) {
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fArgVector.push_back(fCurrentArg);
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fTotalStringSize += fCurrentArg.length() + 1;
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fCurrentArgStarted = false;
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}
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}
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void _PushCharacter(char c)
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{
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if (!fCurrentArgStarted) {
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fCurrentArg = "";
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fCurrentArgStarted = true;
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}
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fCurrentArg += c;
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}
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private:
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// temporaries
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std::string fCurrentArg;
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bool fCurrentArgStarted;
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std::vector<std::string> fArgVector;
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size_t fTotalStringSize;
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};
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ArgumentVector::ArgumentVector()
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:
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fArguments(NULL),
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fCount(0)
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{
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}
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ArgumentVector::~ArgumentVector()
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{
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free(fArguments);
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}
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char**
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ArgumentVector::DetachArguments()
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{
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char** arguments = fArguments;
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fArguments = NULL;
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fCount = 0;
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return arguments;
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}
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ArgumentVector::ParseError
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ArgumentVector::Parse(const char* commandLine, const char** _errorLocation)
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{
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free(DetachArguments());
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ParseError error;
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const char* errorLocation = commandLine;
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try {
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Parser parser;
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error = parser.Parse(commandLine, errorLocation);
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if (error == NO_ERROR) {
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// Create a char* array and copy everything into a single
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// allocation.
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int count = parser.ArgVector().size();
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size_t arraySize = (count + 1) * sizeof(char*);
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fArguments = (char**)malloc(
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arraySize + parser.TotalStringSize());
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if (fArguments != 0) {
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char* argument = (char*)(fArguments + count + 1);
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for (int i = 0; i < count; i++) {
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fArguments[i] = argument;
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const std::string& sourceArgument = parser.ArgVector()[i];
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size_t argumentSize = sourceArgument.length() + 1;
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memcpy(argument, sourceArgument.c_str(), argumentSize);
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argument += argumentSize;
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}
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fArguments[count] = NULL;
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fCount = count;
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} else
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error = NO_MEMORY;
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}
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} catch (...) {
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error = NO_MEMORY;
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}
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if (error != NO_ERROR && _errorLocation != NULL)
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*_errorLocation = errorLocation;
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return error;
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}
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