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/* -*- c-basic-offset: 2 -*- */
/*
Copyright(C) 2011-2013 Kentoku SHIBA
Copyright(C) 2011-2013 Kouhei Sutou <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mrn_parameters_parser.hpp"
#include <mrn_mysql_compat.h>
namespace mrn {
class Parameter {
public:
char *key_;
char *value_;
Parameter(const char *key, unsigned int key_length,
const char *value, unsigned int value_length)
: key_(my_strndup(key, key_length, MYF(0))),
value_(my_strndup(value, value_length, MYF(0))) {
};
~Parameter() {
if (key_) {
my_free(key_, MYF(0));
}
if (value_) {
my_free(value_, MYF(0));
}
};
};
ParametersParser::ParametersParser(const char *input,
unsigned int input_length)
: input_(input),
input_length_(input_length),
parameters_(NULL) {
}
ParametersParser::~ParametersParser() {
for (LIST *next = parameters_; next; next = next->next) {
Parameter *parameter = static_cast<Parameter *>(next->data);
delete parameter;
}
list_free(parameters_, false);
}
void ParametersParser::parse() {
const char *current = input_;
const char *end = input_ + input_length_;
for (; current < end; ++current) {
if (is_white_space(current[0])) {
continue;
}
const char *key = current;
unsigned int key_length = 0;
while (current < end &&
!is_white_space(current[0]) &&
current[0] != '\'' && current[0] != '"' && current[0] != ',') {
++current;
++key_length;
}
if (current == end) {
break;
}
while (current < end && is_white_space(current[0])) {
++current;
}
if (current == end) {
break;
}
current = parse_value(current, end, key, key_length);
if (!current) {
break;
}
while (current < end && is_white_space(current[0])) {
++current;
}
if (current == end) {
break;
}
if (current[0] != ',') {
// TODO: report error
break;
}
}
}
const char *ParametersParser::parse_value(const char *current,
const char *end,
const char *key,
unsigned int key_length) {
char quote = current[0];
if (quote != '\'' && quote != '"') {
// TODO: report error
return NULL;
}
++current;
bool found = false;
static const unsigned int max_value_length = 4096;
char value[max_value_length];
unsigned int value_length = 0;
for (; current < end && value_length < max_value_length; ++current) {
if (current[0] == quote) {
Parameter *parameter = new Parameter(key, key_length,
value, value_length);
list_push(parameters_, parameter);
found = true;
++current;
break;
}
switch (current[0]) {
case '\\':
if (current + 1 == end) {
break;
}
switch (current[1]) {
case 'b':
value[value_length] = '\b';
break;
case 'n':
value[value_length] = '\n';
break;
case 'r':
value[value_length] = '\r';
break;
case 't':
value[value_length] = '\t';
break;
default:
value[value_length] = current[1];
break;
}
break;
default:
value[value_length] = current[0];
break;
}
++value_length;
}
if (!found) {
// TODO: report error
}
return current;
}
const char *ParametersParser::operator[](const char *key) {
for (LIST *next = parameters_; next; next = next->next) {
Parameter *parameter = static_cast<Parameter *>(next->data);
if (strcasecmp(parameter->key_, key) == 0) {
return parameter->value_;
}
}
return NULL;
}
}
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