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sfall/sfall/Modules/Scripting/Handlers/Utils.cpp
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/*
* sfall
* Copyright (C) 2008-2016 The sfall team
*
* 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 <cmath>
#include "..\..\..\FalloutEngine\Fallout2.h"
#include "..\..\..\FalloutEngine\EngineUtils.h"
#include "..\..\ScriptExtender.h"
#include "..\..\FileSystem.h"
#include "..\..\Message.h"
#include "..\Arrays.h"
#include "..\OpcodeContext.h"
#include "..\ScriptValue.h"
#include "Utils.h"
namespace sfall
{
namespace script
{
// compares strings case-insensitive with specifics for Fallout
static bool FalloutStringCompare(const char* str1, const char* str2, long codePage) {
while (true) {
unsigned char c1 = *str1;
unsigned char c2 = *str2;
if (c1 == 0 && c2 == 0) return true; // end - strings are equal
if (c1 == 0 || c2 == 0) return false; // strings are not equal
str1++;
str2++;
if (c1 == c2) continue;
if (codePage == 866) {
// replace Russian 'x' to English (Fallout specific)
if (c1 == 229) c1 -= 229 - 'x';
if (c2 == 229) c2 -= 229 - 'x';
}
// 0 - 127 (standard ASCII)
// upper to lower case
if (c1 >= 'A' && c1 <= 'Z') c1 |= 32;
if (c2 >= 'A' && c2 <= 'Z') c2 |= 32;
if (c1 == c2) continue;
if (c1 < 128 || c2 < 128) return false;
// 128 - 255 (international/extended)
switch (codePage) {
case 866:
if (c1 != 149 && c2 != 149) {
// upper to lower case
if (c1 >= 0x80 && c1 <= 0x9F) {
c1 |= 32;
} else if (c1 >= 224 && c1 <= 239) {
c1 -= 48; // shift lower range
} else if (c1 == 240) {
c1++;
}
if (c2 >= 0x80 && c2 <= 0x9F) {
c2 |= 32;
} else if (c2 >= 224 && c2 <= 239) {
c2 -= 48; // shift lower range
} else if (c2 == 240) {
c2++;
}
}
break;
case 1251:
// upper to lower case
if (c1 >= 0xC0 && c1 <= 0xDF) c1 |= 32;
if (c2 >= 0xC0 && c2 <= 0xDF) c2 |= 32;
if (c1 == 0xA8) c1 += 16;
if (c2 == 0xA8) c2 += 16;
break;
case 1250:
case 1252:
if (c1 != 0xD7 && c1 != 0xF7 && c2 != 0xD7 && c2 != 0xF7) {
if (c1 >= 0xC0 && c1 <= 0xDE) c1 |= 32;
if (c2 >= 0xC0 && c2 <= 0xDE) c2 |= 32;
}
break;
}
if (c1 != c2) return false; // strings are not equal
}
}
void sf_sqrt(OpcodeContext& ctx) {
ctx.setReturn(sqrt(ctx.arg(0).asFloat()));
}
void sf_abs(OpcodeContext& ctx) {
if (ctx.arg(0).isInt()) {
ctx.setReturn(abs((int)ctx.arg(0).rawValue()));
} else {
ctx.setReturn(abs(ctx.arg(0).asFloat()));
}
}
void sf_sin(OpcodeContext& ctx) {
ctx.setReturn(sin(ctx.arg(0).asFloat()));
}
void sf_cos(OpcodeContext& ctx) {
ctx.setReturn(cos(ctx.arg(0).asFloat()));
}
void sf_tan(OpcodeContext& ctx) {
ctx.setReturn(tan(ctx.arg(0).asFloat()));
}
void sf_arctan(OpcodeContext& ctx) {
ctx.setReturn(atan2(ctx.arg(0).asFloat(), ctx.arg(1).asFloat()));
}
void sf_strlen(OpcodeContext& ctx) {
ctx.setReturn(
static_cast<int>(strlen(ctx.arg(0).strValue()))
);
}
void sf_atoi(OpcodeContext& ctx) {
auto str = ctx.arg(0).strValue();
ctx.setReturn(
static_cast<int>(strtol(str, (char**)nullptr, 0)) // auto-determine radix
);
}
void sf_atof(OpcodeContext& ctx) {
auto str = ctx.arg(0).strValue();
ctx.setReturn(
static_cast<float>(atof(str))
);
}
void sf_ord(OpcodeContext& ctx) {
unsigned char firstChar = ctx.arg(0).strValue()[0];
ctx.setReturn(static_cast<unsigned long>(firstChar));
}
void sf_typeof(OpcodeContext& ctx) {
ctx.setReturn(static_cast<int>(ctx.arg(0).type()));
}
static int _stdcall StringSplit(const char* str, const char* split) {
int id;
size_t count, splitLen = strlen(split);
if (!splitLen) {
count = strlen(str);
id = TempArray(count, 0);
for (DWORD i = 0; i < count; i++) {
arrays[id].val[i].set(&str[i], 1);
}
} else {
count = 1;
const char *ptr = str, *newptr;
while (true) {
newptr = strstr(ptr, split);
if (!newptr) break;
count++;
ptr = newptr + splitLen;
}
id = TempArray(count, 0);
ptr = str;
count = 0;
while (true) {
newptr = strstr(ptr, split);
int len = (newptr) ? newptr - ptr : strlen(ptr);
arrays[id].val[count++].set(ptr, len);
if (!newptr) break;
ptr = newptr + splitLen;
}
}
return id;
}
void sf_string_split(OpcodeContext& ctx) {
ctx.setReturn(StringSplit(ctx.arg(0).strValue(), ctx.arg(1).strValue()));
}
static char* SubString(const char* str, int startPos, int length) {
int len = strlen(str);
if (startPos < 0) {
startPos += len; // start from end
if (startPos < 0) startPos = 0;
}
if (length < 0) {
length += len - startPos; // cutoff at end
if (length == 0) return "";
length = abs(length); // length can't be negative
}
// check position
if (startPos >= len) return ""; // start position is out of string length, return empty string
if (length == 0 || length + startPos > len) {
length = len - startPos; // set the correct length, the length of characters goes beyond the end of the string
}
const int bufMax = ScriptExtender::TextBufferSize() - 1;
if (length > bufMax) length = bufMax;
memcpy(ScriptExtender::gTextBuffer, &str[startPos], length);
ScriptExtender::gTextBuffer[length] = '\0';
return ScriptExtender::gTextBuffer;
}
void sf_substr(OpcodeContext& ctx) {
const char* str = ctx.arg(0).strValue();
if (*str != '\0') str = SubString(str, ctx.arg(1).rawValue(), ctx.arg(2).rawValue());
ctx.setReturn(str);
}
void sf_string_compare(OpcodeContext& ctx) {
if (ctx.numArgs() < 3) {
ctx.setReturn(
(_stricmp(ctx.arg(0).strValue(), ctx.arg(1).strValue()) ? 0 : 1)
);
} else {
ctx.setReturn(FalloutStringCompare(ctx.arg(0).strValue(), ctx.arg(1).strValue(), ctx.arg(2).rawValue()));
}
}
// A safer version of sprintf for using in user scripts.
static char* sprintf_lite(const char* format, ScriptValue value) {
int fmtlen = strlen(format);
int buflen = fmtlen + 1;
for (int i = 0; i < fmtlen; i++) {
if (format[i] == '%') buflen++; // will possibly be escaped, need space for that
}
// parse format to make it safe
char* newfmt = new char[buflen];
byte mode = 0;
int j = 0;
char c, specifier;
bool hasDigits = false;
for (int i = 0; i < fmtlen; i++) {
c = format[i];
switch (mode) {
case 0: // prefix
if (c == '%') {
mode = 1;
}
break;
case 1: // definition
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
if (c == 'h' || c == 'l' || c == 'j' || c == 'z' || c == 't' || c == 'L') { // ignore sub-specifiers
continue;
}
if (c == 's' && !value.isString()) { // don't allow to treat non-string values as string pointers
c = 'd';
} else if (c == 'n') { // don't allow "n" specifier
c = 'd';
}
specifier = c;
mode = 2;
} else if (c == '%') {
mode = 0;
hasDigits = false;
} else if (c >= '0' && c <= '9') {
hasDigits = true;
}
break;
case 2: // postfix
default:
if (c == '%') { // don't allow more than one specifier
newfmt[j++] = '%'; // escape it
if (format[i + 1] == '%') {
i++; // skip already escaped
}
}
break;
}
newfmt[j++] = c;
}
newfmt[j] = '\0';
// calculate required length
if (hasDigits) {
buflen = 254;
} else if (specifier == 'c') {
buflen = j;
} else if (specifier == 's') {
buflen = j + strlen(value.strValue());
} else {
buflen = j + 30; // numbers
}
const long bufMaxLen = ScriptExtender::TextBufferSize() - 1;
if (buflen > bufMaxLen - 1) buflen = bufMaxLen - 1;
ScriptExtender::gTextBuffer[bufMaxLen] = '\0';
if (value.isFloat()) {
_snprintf(ScriptExtender::gTextBuffer, buflen, newfmt, value.floatValue());
} else {
_snprintf(ScriptExtender::gTextBuffer, buflen, newfmt, value.rawValue());
}
delete[] newfmt;
return ScriptExtender::gTextBuffer;
}
void sf_sprintf(OpcodeContext& ctx) {
ctx.setReturn(
sprintf_lite(ctx.arg(0).strValue(), ctx.arg(1))
);
}
void sf_string_format(OpcodeContext& ctx) {
const char* format = ctx.arg(0).strValue();
int fmtLen = strlen(format);
if (fmtLen == 0) {
ctx.setReturn(format);
return;
}
if (fmtLen > 1024) {
ctx.printOpcodeError("%s() - the format string exceeds maximum length of 1024 characters.", ctx.getMetaruleName());
ctx.setReturn("Error");
} else {
char* newFmt = new char[fmtLen + 1];
newFmt[fmtLen] = '\0';
// parse format to make it safe
int i = 0, arg = 0, totalArg = ctx.numArgs(); // total passed args
do {
char c = format[i];
if (c == '%') {
char cf = format[i + 1];
if (cf != '%') {
if (arg >= 0) {
arg++;
if (arg == totalArg) arg = -1; // format '%' prefixes in the format string exceed the number of passed value args
}
if (arg < 0) { // have % more than passed value args
c = '^'; // delete %
}
// check string is valid or replace unsupported format
else if ((cf == 's' && (arg > 0 && !ctx.arg(arg).isString())) || (cf != 's' && cf != 'd')) {
newFmt[i++] = c;
c = 'd'; // replace with %d
}
} else {
newFmt[i++] = cf; // skip %%
}
}
newFmt[i] = c;
} while (++i < fmtLen);
const long bufMaxLen = ScriptExtender::TextBufferSize() - 1;
switch (totalArg) {
case 2 :
_snprintf(ScriptExtender::gTextBuffer, bufMaxLen, newFmt, ctx.arg(1).rawValue());
break;
case 3 :
_snprintf(ScriptExtender::gTextBuffer, bufMaxLen, newFmt, ctx.arg(1).rawValue(), ctx.arg(2).rawValue());
break;
case 4 :
_snprintf(ScriptExtender::gTextBuffer, bufMaxLen, newFmt, ctx.arg(1).rawValue(), ctx.arg(2).rawValue(), ctx.arg(3).rawValue());
break;
case 5 :
_snprintf(ScriptExtender::gTextBuffer, bufMaxLen, newFmt, ctx.arg(1).rawValue(), ctx.arg(2).rawValue(), ctx.arg(3).rawValue(), ctx.arg(4).rawValue());
}
ScriptExtender::gTextBuffer[bufMaxLen] = '\0'; // just in case
delete[] newFmt;
ctx.setReturn(ScriptExtender::gTextBuffer);
}
}
void sf_power(OpcodeContext& ctx) {
const ScriptValue &base = ctx.arg(0),
&power = ctx.arg(1);
float result = 0.0;
if (power.isFloat())
result = pow(base.asFloat(), power.floatValue());
else
result = pow(base.asFloat(), (int)power.rawValue());
if (base.isInt() && power.isInt()) {
ctx.setReturn(static_cast<int>(result));
} else {
ctx.setReturn(result);
}
}
void sf_log(OpcodeContext& ctx) {
ctx.setReturn(log(ctx.arg(0).asFloat()));
}
void sf_exponent(OpcodeContext& ctx) {
ctx.setReturn(exp(ctx.arg(0).asFloat()));
}
void sf_ceil(OpcodeContext& ctx) {
ctx.setReturn(static_cast<int>(ceil(ctx.arg(0).asFloat())));
}
void sf_round(OpcodeContext& ctx) {
float arg = ctx.arg(0).asFloat();
int argI = static_cast<int>(arg);
float mod = arg - static_cast<float>(argI);
if (abs(mod) >= 0.5) {
argI += (mod > 0 ? 1 : -1);
}
ctx.setReturn(argI);
}
void sf_message_str_game(OpcodeContext& ctx) {
const char* msg = nullptr;
int fileId = ctx.arg(0).rawValue();
if (fileId >= 0) {
int msgId = ctx.arg(1).rawValue();
if (fileId < 20) { // main msg files
msg = fo::GetMessageStr(gameMsgFiles[fileId], msgId);
} else if (fileId >= 0x1000 && fileId <= 0x1005) { // proto msg files
msg = fo::GetMessageStr(&fo::var::proto_msg_files[fileId - 0x1000], msgId);
} else if (fileId >= 0x2000) { // Extra game message files.
ExtraGameMessageListsMap::iterator it = gExtraGameMsgLists.find(fileId);
if (it != gExtraGameMsgLists.end()) {
msg = GetMsg(it->second.get(), msgId, 2);
}
}
}
if (msg == nullptr) msg = "Error";
ctx.setReturn(msg);
}
void sf_add_extra_msg_file(OpcodeContext& ctx) {
long result = Message::AddExtraMsgFile(ctx.arg(0).strValue(), (ctx.numArgs() == 2) ? ctx.arg(1).rawValue() : 0);
switch (result) {
case -1 :
ctx.printOpcodeError("%s() - cannot add message file with the specified number.", ctx.getMetaruleName());
break;
case -2 :
ctx.printOpcodeError("%s() - error loading message file.", ctx.getMetaruleName());
break;
case -3 :
ctx.printOpcodeError("%s() - the limit of adding message files has been exceeded.", ctx.getMetaruleName());
}
ctx.setReturn(result);
}
void sf_floor2(OpcodeContext& ctx) {
ctx.setReturn(static_cast<int>(floor(ctx.arg(0).asFloat())));
}
void sf_get_string_pointer(OpcodeContext& ctx) {
ctx.setReturn(reinterpret_cast<long>(ctx.arg(0).strValue()), DataType::INT);
}
void sf_get_text_width(OpcodeContext& ctx) {
ctx.setReturn(fo::GetTextWidth(ctx.arg(0).strValue()));
}
}
}