mirror of
https://github.com/Ninjdai1/pokeemerald.git
synced 2024-12-27 20:24:18 +01:00
356 lines
8.9 KiB
C++
356 lines
8.9 KiB
C++
// Copyright(c) 2016 YamaArashi
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
#include <cstdio>
|
|
#include <cstdarg>
|
|
#include <stdexcept>
|
|
#include "preproc.h"
|
|
#include "string_parser.h"
|
|
#include "char_util.h"
|
|
#include "utf8.h"
|
|
|
|
// Reads a charmap char or escape sequence.
|
|
std::string StringParser::ReadCharOrEscape()
|
|
{
|
|
std::string sequence;
|
|
|
|
bool isEscape = (m_buffer[m_pos] == '\\');
|
|
|
|
if (isEscape)
|
|
{
|
|
m_pos++;
|
|
|
|
if (m_buffer[m_pos] == '"')
|
|
{
|
|
sequence = g_charmap->Char('"');
|
|
|
|
if (sequence.length() == 0)
|
|
RaiseError("no mapping exists for double quote");
|
|
|
|
return sequence;
|
|
}
|
|
else if (m_buffer[m_pos] == '\\')
|
|
{
|
|
sequence = g_charmap->Char('\\');
|
|
|
|
if (sequence.length() == 0)
|
|
RaiseError("no mapping exists for backslash");
|
|
|
|
return sequence;
|
|
}
|
|
}
|
|
|
|
unsigned char c = m_buffer[m_pos];
|
|
|
|
if (c == 0)
|
|
{
|
|
if (m_pos >= m_size)
|
|
RaiseError("unexpected EOF in UTF-8 string");
|
|
else
|
|
RaiseError("unexpected null character in UTF-8 string");
|
|
}
|
|
|
|
if (IsAscii(c) && !IsAsciiPrintable(c))
|
|
RaiseError("unexpected character U+%X in UTF-8 string", c);
|
|
|
|
UnicodeChar unicodeChar = DecodeUtf8(&m_buffer[m_pos]);
|
|
m_pos += unicodeChar.encodingLength;
|
|
std::int32_t code = unicodeChar.code;
|
|
|
|
if (code == -1)
|
|
RaiseError("invalid encoding in UTF-8 string");
|
|
|
|
if (isEscape && code >= 128)
|
|
RaiseError("escapes using non-ASCII characters are invalid");
|
|
|
|
sequence = isEscape ? g_charmap->Escape(code) : g_charmap->Char(code);
|
|
|
|
if (sequence.length() == 0)
|
|
{
|
|
if (isEscape)
|
|
RaiseError("unknown escape '\\%c'", code);
|
|
else
|
|
RaiseError("unknown character U+%X", code);
|
|
}
|
|
|
|
return sequence;
|
|
}
|
|
|
|
// Reads a charmap constant, i.e. "{FOO}".
|
|
std::string StringParser::ReadBracketedConstants()
|
|
{
|
|
std::string totalSequence;
|
|
|
|
m_pos++; // Assume we're on the left curly bracket.
|
|
|
|
while (m_buffer[m_pos] != '}')
|
|
{
|
|
SkipWhitespace();
|
|
|
|
if (IsIdentifierStartingChar(m_buffer[m_pos]))
|
|
{
|
|
long startPos = m_pos;
|
|
|
|
m_pos++;
|
|
|
|
while (IsIdentifierChar(m_buffer[m_pos]))
|
|
m_pos++;
|
|
|
|
std::string sequence = g_charmap->Constant(std::string(&m_buffer[startPos], m_pos - startPos));
|
|
|
|
if (sequence.length() == 0)
|
|
{
|
|
m_buffer[m_pos] = 0;
|
|
RaiseError("unknown constant '%s'", &m_buffer[startPos]);
|
|
}
|
|
|
|
totalSequence += sequence;
|
|
}
|
|
else if (IsAsciiDigit(m_buffer[m_pos]))
|
|
{
|
|
Integer integer = ReadInteger();
|
|
|
|
switch (integer.size)
|
|
{
|
|
case 1:
|
|
totalSequence += (unsigned char)integer.value;
|
|
break;
|
|
case 2:
|
|
totalSequence += (unsigned char)integer.value;
|
|
totalSequence += (unsigned char)(integer.value >> 8);
|
|
break;
|
|
case 4:
|
|
totalSequence += (unsigned char)integer.value;
|
|
totalSequence += (unsigned char)(integer.value >> 8);
|
|
totalSequence += (unsigned char)(integer.value >> 16);
|
|
totalSequence += (unsigned char)(integer.value >> 24);
|
|
break;
|
|
}
|
|
}
|
|
else if (m_buffer[m_pos] == 0)
|
|
{
|
|
if (m_pos >= m_size)
|
|
RaiseError("unexpected EOF after left curly bracket");
|
|
else
|
|
RaiseError("unexpected null character within curly brackets");
|
|
}
|
|
else
|
|
{
|
|
if (IsAsciiPrintable(m_buffer[m_pos]))
|
|
RaiseError("unexpected character '%c' within curly brackets", m_buffer[m_pos]);
|
|
else
|
|
RaiseError("unexpected character '\\x%02X' within curly brackets", m_buffer[m_pos]);
|
|
}
|
|
}
|
|
|
|
m_pos++; // Go past the right curly bracket.
|
|
|
|
return totalSequence;
|
|
}
|
|
|
|
// Reads a charmap string.
|
|
int StringParser::ParseString(long srcPos, unsigned char* dest, int& destLength)
|
|
{
|
|
m_pos = srcPos;
|
|
|
|
if (m_buffer[m_pos] != '"')
|
|
RaiseError("expected UTF-8 string literal");
|
|
|
|
long start = m_pos;
|
|
|
|
m_pos++;
|
|
|
|
destLength = 0;
|
|
|
|
while (m_buffer[m_pos] != '"')
|
|
{
|
|
std::string sequence = (m_buffer[m_pos] == '{') ? ReadBracketedConstants() : ReadCharOrEscape();
|
|
|
|
for (const char& c : sequence)
|
|
{
|
|
if (destLength == kMaxStringLength)
|
|
RaiseError("mapped string longer than %d bytes", kMaxStringLength);
|
|
|
|
dest[destLength++] = c;
|
|
}
|
|
}
|
|
|
|
m_pos++; // Go past the right quote.
|
|
|
|
return m_pos - start;
|
|
}
|
|
|
|
void StringParser::RaiseError(const char* format, ...)
|
|
{
|
|
const int bufferSize = 1024;
|
|
char buffer[bufferSize];
|
|
|
|
std::va_list args;
|
|
va_start(args, format);
|
|
std::vsnprintf(buffer, bufferSize, format, args);
|
|
va_end(args);
|
|
|
|
throw std::runtime_error(buffer);
|
|
}
|
|
|
|
// Converts digit character to numerical value.
|
|
static int ConvertDigit(char c, int radix)
|
|
{
|
|
int digit;
|
|
|
|
if (c >= '0' && c <= '9')
|
|
digit = c - '0';
|
|
else if (c >= 'A' && c <= 'F')
|
|
digit = 10 + c - 'A';
|
|
else if (c >= 'a' && c <= 'f')
|
|
digit = 10 + c - 'a';
|
|
else
|
|
return -1;
|
|
|
|
return (digit < radix) ? digit : -1;
|
|
}
|
|
|
|
void StringParser::SkipRestOfInteger(int radix)
|
|
{
|
|
while (ConvertDigit(m_buffer[m_pos], radix) != -1)
|
|
m_pos++;
|
|
}
|
|
|
|
StringParser::Integer StringParser::ReadDecimal()
|
|
{
|
|
const int radix = 10;
|
|
std::uint64_t n = 0;
|
|
int digit;
|
|
std::uint64_t max = UINT32_MAX;
|
|
long startPos = m_pos;
|
|
|
|
while ((digit = ConvertDigit(m_buffer[m_pos], radix)) != -1)
|
|
{
|
|
n = n * radix + digit;
|
|
|
|
if (n >= max)
|
|
{
|
|
SkipRestOfInteger(radix);
|
|
|
|
std::string intLiteral(m_buffer + startPos, m_pos - startPos);
|
|
RaiseError("integer literal \"%s\" is too large", intLiteral.c_str());
|
|
}
|
|
|
|
m_pos++;
|
|
}
|
|
|
|
int size;
|
|
|
|
if (m_buffer[m_pos] == 'H')
|
|
{
|
|
if (n >= 0x10000)
|
|
{
|
|
RaiseError("%lu is too large to be a halfword", (unsigned long)n);
|
|
}
|
|
|
|
size = 2;
|
|
m_pos++;
|
|
}
|
|
else if (m_buffer[m_pos] == 'W')
|
|
{
|
|
size = 4;
|
|
m_pos++;
|
|
}
|
|
else
|
|
{
|
|
if (n >= 0x10000)
|
|
size = 4;
|
|
else if (n >= 0x100)
|
|
size = 2;
|
|
else
|
|
size = 1;
|
|
}
|
|
|
|
return{ static_cast<std::uint32_t>(n), size };
|
|
}
|
|
|
|
StringParser::Integer StringParser::ReadHex()
|
|
{
|
|
const int radix = 16;
|
|
std::uint64_t n = 0;
|
|
int digit;
|
|
std::uint64_t max = UINT32_MAX;
|
|
long startPos = m_pos;
|
|
|
|
while ((digit = ConvertDigit(m_buffer[m_pos], radix)) != -1)
|
|
{
|
|
n = n * radix + digit;
|
|
|
|
if (n >= max)
|
|
{
|
|
SkipRestOfInteger(radix);
|
|
|
|
std::string intLiteral(m_buffer + startPos, m_pos - startPos);
|
|
RaiseError("integer literal \"%s\" is too large", intLiteral.c_str());
|
|
}
|
|
|
|
m_pos++;
|
|
}
|
|
|
|
int length = m_pos - startPos;
|
|
int size = 0;
|
|
|
|
switch (length)
|
|
{
|
|
case 2:
|
|
size = 1;
|
|
break;
|
|
case 4:
|
|
size = 2;
|
|
break;
|
|
case 8:
|
|
size = 4;
|
|
break;
|
|
default:
|
|
{
|
|
std::string intLiteral(m_buffer + startPos, m_pos - startPos);
|
|
RaiseError("hex integer literal \"0x%s\" doesn't have length of 2, 4, or 8 digits", intLiteral.c_str());
|
|
}
|
|
}
|
|
|
|
return{ static_cast<std::uint32_t>(n), size };
|
|
}
|
|
|
|
StringParser::Integer StringParser::ReadInteger()
|
|
{
|
|
if (!IsAsciiDigit(m_buffer[m_pos]))
|
|
RaiseError("expected integer");
|
|
|
|
if (m_buffer[m_pos] == '0' && m_buffer[m_pos + 1] == 'x')
|
|
{
|
|
m_pos += 2;
|
|
return ReadHex();
|
|
}
|
|
|
|
return ReadDecimal();
|
|
}
|
|
|
|
// Skips tabs and spaces.
|
|
void StringParser::SkipWhitespace()
|
|
{
|
|
while (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
|
|
m_pos++;
|
|
}
|