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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "common/util.h"
#include "ags/shared/util/ini_file.h"
#include "ags/shared/util/text_stream_reader.h"
#include "ags/shared/util/text_stream_writer.h"
namespace AGS3 {
namespace AGS {
namespace Shared {
inline static void ReplaceSubString(String &line, IniFile::StrPos &sub_pos, const String &new_sub) {
line.ReplaceMid(sub_pos.first, sub_pos.second - sub_pos.first, new_sub);
}
IniFile::ItemDef::ItemDef(const String &key, const String &value) {
Line = String::FromFormat("%s=%s", key.GetCStr(), value.GetCStr());
Key.first = 0;
Key.second = Key.first + key.GetLength();
SepAt = Key.second;
Value.first = Key.second + 1;
Value.second = Value.first + value.GetLength();
}
IniFile::ItemDef::ItemDef(const String &line, const StrPos &key, const StrPos &value, size_t sep_at) {
Line = line;
Key = key;
Value = value;
SepAt = sep_at;
}
void IniFile::ItemDef::SetKey(const String &key) {
if (key.IsEmpty())
return;
if (IsKeyValue()) {
size_t diff = key.GetLength() - (Key.second - Key.first);
ReplaceSubString(Line, Key, key);
Key.second += diff;
Value.first += diff;
Value.second += diff;
} else {
*this = ItemDef(key, "");
}
}
void IniFile::ItemDef::SetValue(const String &value) {
if (!IsKeyValue())
return; // no key
if (SepAt != String::NoIndex) { // replacing existing value
size_t diff = value.GetLength() - (Value.second - Value.first);
ReplaceSubString(Line, Value, value);
Value.second += diff;
} else { // inserting value behind the key
StrPos valpos(Key.second, Key.second);
ReplaceSubString(Line, valpos, String::FromFormat("=%s", value.GetCStr()));
}
}
IniFile::SectionDef::SectionDef(const String &name) {
if (name.IsEmpty()) {
// global section
Name = StrPos(0, 0);
} else {
// named section
Header = String::FromFormat("[%s]", name.GetCStr());
Name.first = 1;
Name.second = 1 + Header.GetLength();
}
}
IniFile::SectionDef::SectionDef(const String &line, const StrPos &name) {
Header = line;
Name = name;
}
void IniFile::SectionDef::SetName(const String &sec_name) {
if (sec_name.IsEmpty())
return;
size_t diff = sec_name.GetLength() - (Name.second - Name.first);
ReplaceSubString(Header, Name, sec_name);
Name.second += diff;
}
void IniFile::SectionDef::Clear() {
Items.clear();
}
IniFile::ItemIterator IniFile::SectionDef::InsertItem(ItemIterator item, const ItemDef &itemdef) {
return Items.insert(item, itemdef);
}
void IniFile::SectionDef::EraseItem(ItemIterator item) {
Items.erase(item);
}
IniFile::ItemIterator IniFile::InsertItem(SectionIterator sec, ItemIterator item, const String &key, const String &value) {
ItemDef itemdef(key, value);
return sec->InsertItem(item, itemdef);
}
IniFile::SectionIterator IniFile::InsertSection(SectionIterator sec, const String &name) {
if (name.IsEmpty())
return _sections.end(); // do not allow adding random global sections
SectionDef secdef(name);
return _sections.insert(sec, secdef);
}
void IniFile::RemoveItem(SectionIterator sec, ItemIterator item) {
sec->EraseItem(item);
}
void IniFile::RemoveSection(SectionIterator sec) {
if (sec == _sections.begin())
// do not remove global section, clear items instead
sec->Clear();
else
_sections.erase(sec);
}
// Moves string pointer forward to the first non-space character
const char *SkipSpace(const char *line, const char *endl) {
for (; line != endl && Common::isSpace(*line); ++line);
return line;
}
// Parse given line and extract a meaningful string;
// Parses line from 'line' to 'endl', skips padding (spaces)
// at the beginning and the end. Assignes the starting and ending
// pointers of the string. Returns pointer to where parsing stopped.
// The 'endl' must point beyond the last character of the string
// (e.g. terminator).
const char *ParsePaddedString(const char *line, const char *endl,
const char *&str_at, const char *&str_end) {
// skip left padding
for (; line != endl && Common::isBlank(*line); ++line);
str_at = line;
// skip right padding
const char *p_value = line;
for (line = endl; line != p_value && Common::isBlank(*(line - 1)); --line);
str_end = line;
return line;
}
IniFile::IniFile() {
// precreate global section
_sections.push_back(SectionDef(""));
}
void IniFile::Read(Stream *in) {
TextStreamReader reader(in);
_sections.clear();
// Create a global section;
// all the items we meet before explicit section declaration
// will be treated as "global" items.
_sections.push_back(SectionDef(""));
SectionDef *cur_section = &_sections.back();
do {
String line = reader.ReadLine();
if (line.IsEmpty() && reader.EOS())
break;
const char *cstr = line.GetCStr();
const char *pstr = cstr;
const char *endl = cstr + line.GetLength();
// Find first non-space character
pstr = SkipSpace(pstr, endl);
if (pstr == endl)
continue; // empty line
// Detect the kind of string we found
if ((endl - pstr >= 2 && *pstr == '/' && *(pstr + 1) == '/') ||
(endl - pstr >= 1 && (*pstr == '#' || *pstr == ';'))) {
StrPos nullpos(0, 0);
cur_section->InsertItem(cur_section->End(), ItemDef(line, nullpos, nullpos, String::NoIndex));
continue;
}
if (*pstr == '[') {
// Parse this as section
const char *pstr_end = strrchr(pstr, ']');
if (pstr_end < pstr)
continue; // no closing bracket
// Parse the section name
const char *str_at, *str_end;
ParsePaddedString(++pstr, pstr_end, str_at, str_end);
if (str_end == str_at)
continue; // inappropriate data or empty string
StrPos namepos(str_at - cstr, str_end - cstr);
_sections.push_back(SectionDef(line, namepos));
cur_section = &_sections.back();
} else {
// Parse this as a key-value pair
const char *pstr_end = strchr(pstr, '=');
if (pstr_end == pstr)
continue; // no key part, skip the line
if (!pstr_end)
pstr_end = endl; // no value part
// Parse key
const char *str_at, *str_end;
ParsePaddedString(pstr, pstr_end, str_at, str_end);
pstr = pstr_end;
if (str_end == str_at)
continue; // inappropriate data or empty string
// Create an item and parse value, if any
StrPos keypos(str_at - cstr, str_end - cstr);
StrPos valpos(0, 0);
size_t sep_at = String::NoIndex;
if (pstr != endl) {
sep_at = pstr - cstr;
ParsePaddedString(++pstr, endl, str_at, str_end);
valpos.first = str_at - cstr;
valpos.second = str_end - cstr;
}
cur_section->InsertItem(cur_section->End(), ItemDef(line, keypos, valpos, sep_at));
}
} while (!reader.EOS());
reader.ReleaseStream();
}
void IniFile::Write(Stream *out) const {
TextStreamWriter writer(out);
for (ConstSectionIterator sec = _sections.begin(); sec != _sections.end(); ++sec) {
if (sec != _sections.begin()) // do not write global section's name
writer.WriteLine(sec->GetLine());
for (ConstItemIterator item = sec->CBegin(); item != sec->CEnd(); ++item)
writer.WriteLine(item->GetLine());
}
writer.ReleaseStream();
}
} // namespace Shared
} // namespace AGS
} // namespace AGS3
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