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script.cpp
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script.cpp
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// Avisynth v2.5. Copyright 2002 Ben Rudiak-Gould et al.
// http://www.avisynth.org
// 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 2 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, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA, or visit
// http://www.gnu.org/copyleft/gpl.html .
//
// Linking Avisynth statically or dynamically with other modules is making a
// combined work based on Avisynth. Thus, the terms and conditions of the GNU
// General Public License cover the whole combination.
//
// As a special exception, the copyright holders of Avisynth give you
// permission to link Avisynth with independent modules that communicate with
// Avisynth solely through the interfaces defined in avisynth.h, regardless of the license
// terms of these independent modules, and to copy and distribute the
// resulting combined work under terms of your choice, provided that
// every copy of the combined work is accompanied by a complete copy of
// the source code of Avisynth (the version of Avisynth used to produce the
// combined work), being distributed under the terms of the GNU General
// Public License plus this exception. An independent module is a module
// which is not derived from or based on Avisynth, such as 3rd-party filters,
// import and export plugins, or graphical user interfaces.
#include "script.h"
#include <time.h>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <fstream>
#include <memory>
#ifdef AVS_WINDOWS
#include <io.h>
#include <avs/win.h>
#else
#include <avs/posix.h>
#include "os/win32_string_compat.h"
#include <dirent.h>
#endif
#include <avs/filesystem.h>
#include <avs/minmax.h>
#include <new>
#include "../internal.h"
#include "../Prefetcher.h"
#include "../InternalEnvironment.h"
#include "../strings.h"
#include <map>
#include <string>
#include <utility>
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#ifndef MINGW_HAS_SECURE_API
#define sprintf_s sprintf
#endif
/********************************************************************
***** Declare index of new filters for Avisynth's filter engine *****
********************************************************************/
extern const AVSFunction Script_functions[] = {
{ "muldiv", BUILTIN_FUNC_PREFIX, "iii", Muldiv },
{ "floor", BUILTIN_FUNC_PREFIX, "f", Floor },
{ "ceil", BUILTIN_FUNC_PREFIX, "f", Ceil },
{ "round", BUILTIN_FUNC_PREFIX, "f", Round },
{ "acos", BUILTIN_FUNC_PREFIX, "f", Acos },
{ "asin", BUILTIN_FUNC_PREFIX, "f", Asin },
{ "atan", BUILTIN_FUNC_PREFIX, "f", Atan },
{ "atan2", BUILTIN_FUNC_PREFIX, "ff", Atan2 },
{ "cos", BUILTIN_FUNC_PREFIX, "f", Cos },
{ "cosh", BUILTIN_FUNC_PREFIX, "f", Cosh },
{ "exp", BUILTIN_FUNC_PREFIX, "f", Exp },
{ "fmod", BUILTIN_FUNC_PREFIX, "ff", Fmod },
{ "log", BUILTIN_FUNC_PREFIX, "f", Log },
{ "log10", BUILTIN_FUNC_PREFIX, "f", Log10 },
{ "pow", BUILTIN_FUNC_PREFIX, "ff", Pow },
{ "sin", BUILTIN_FUNC_PREFIX, "f", Sin },
{ "sinh", BUILTIN_FUNC_PREFIX, "f", Sinh },
{ "tan", BUILTIN_FUNC_PREFIX, "f", Tan },
{ "tanh", BUILTIN_FUNC_PREFIX, "f", Tanh },
{ "sqrt", BUILTIN_FUNC_PREFIX, "f", Sqrt },
{ "abs", BUILTIN_FUNC_PREFIX, "i", Abs },
{ "abs", BUILTIN_FUNC_PREFIX, "f", FAbs },
{ "pi", BUILTIN_FUNC_PREFIX, "", Pi },
#ifdef OPT_ScriptFunctionTau
{ "tau", BUILTIN_FUNC_PREFIX, "", Tau },
#endif
{ "sign", BUILTIN_FUNC_PREFIX, "f",Sign},
{ "bitand", BUILTIN_FUNC_PREFIX, "ii",BitAnd},
{ "bitnot", BUILTIN_FUNC_PREFIX, "i",BitNot},
{ "bitor", BUILTIN_FUNC_PREFIX, "ii",BitOr},
{ "bitxor", BUILTIN_FUNC_PREFIX, "ii",BitXor},
{ "bitlshift", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitlshiftl", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitlshifta", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitlshiftu", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitlshifts", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitshl", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitsal", BUILTIN_FUNC_PREFIX, "ii",BitLShift},
{ "bitrshiftl", BUILTIN_FUNC_PREFIX, "ii",BitRShiftL},
{ "bitrshifta", BUILTIN_FUNC_PREFIX, "ii",BitRShiftA},
{ "bitrshiftu", BUILTIN_FUNC_PREFIX, "ii",BitRShiftL},
{ "bitrshifts", BUILTIN_FUNC_PREFIX, "ii",BitRShiftA},
{ "bitshr", BUILTIN_FUNC_PREFIX, "ii",BitRShiftL},
{ "bitsar", BUILTIN_FUNC_PREFIX, "ii",BitRShiftA},
{ "bitlrotate", BUILTIN_FUNC_PREFIX, "ii",BitRotateL},
{ "bitrrotate", BUILTIN_FUNC_PREFIX, "ii",BitRotateR},
{ "bitrol", BUILTIN_FUNC_PREFIX, "ii",BitRotateL},
{ "bitror", BUILTIN_FUNC_PREFIX, "ii",BitRotateR},
{ "bitchg", BUILTIN_FUNC_PREFIX, "ii",BitChg},
{ "bitchange", BUILTIN_FUNC_PREFIX, "ii",BitChg},
{ "bitclr", BUILTIN_FUNC_PREFIX, "ii",BitClr},
{ "bitclear", BUILTIN_FUNC_PREFIX, "ii",BitClr},
{ "bitset", BUILTIN_FUNC_PREFIX, "ii",BitSet},
{ "bittst", BUILTIN_FUNC_PREFIX, "ii",BitTst},
{ "bittest", BUILTIN_FUNC_PREFIX, "ii",BitTst},
{ "bitsetcount", BUILTIN_FUNC_PREFIX, "i+",BitSetCount }, // avs+ 180221
{ "lcase", BUILTIN_FUNC_PREFIX, "s",LCase},
{ "ucase", BUILTIN_FUNC_PREFIX, "s",UCase},
{ "strlen", BUILTIN_FUNC_PREFIX, "s",StrLen},
{ "revstr", BUILTIN_FUNC_PREFIX, "s",RevStr},
{ "leftstr", BUILTIN_FUNC_PREFIX, "si",LeftStr},
{ "midstr", BUILTIN_FUNC_PREFIX, "si[length]i",MidStr},
{ "rightstr", BUILTIN_FUNC_PREFIX, "si",RightStr},
{ "findstr", BUILTIN_FUNC_PREFIX, "ss",FindStr},
{ "fillstr", BUILTIN_FUNC_PREFIX, "i[]s",FillStr},
{ "replacestr", BUILTIN_FUNC_PREFIX, "sss[sig]b",ReplaceStr}, // avs+ 161230, case 180222
{ "trimall", BUILTIN_FUNC_PREFIX, "s",TrimAll }, // avs+ 180225 diff name of clip-function Trim
{ "trimleft", BUILTIN_FUNC_PREFIX, "s",TrimLeft }, // avs+ 180225
{ "trimright", BUILTIN_FUNC_PREFIX, "s",TrimRight }, // avs+ 180225
{ "strcmp", BUILTIN_FUNC_PREFIX, "ss",StrCmp},
{ "strcmpi", BUILTIN_FUNC_PREFIX, "ss",StrCmpi},
{ "rand", BUILTIN_FUNC_PREFIX, "[max]i[scale]b[seed]b", Rand },
{ "Select", BUILTIN_FUNC_PREFIX, "i.+", Select },
{ "nop", BUILTIN_FUNC_PREFIX, "", NOP },
{ "undefined",BUILTIN_FUNC_PREFIX, "", Undefined },
{ "width", BUILTIN_FUNC_PREFIX, "c", Width },
{ "height", BUILTIN_FUNC_PREFIX, "c", Height },
{ "framecount", BUILTIN_FUNC_PREFIX, "c", FrameCount },
{ "framerate", BUILTIN_FUNC_PREFIX, "c", FrameRate },
{ "frameratenumerator", BUILTIN_FUNC_PREFIX, "c", FrameRateNumerator },
{ "frameratedenominator", BUILTIN_FUNC_PREFIX, "c", FrameRateDenominator },
{ "audiorate", BUILTIN_FUNC_PREFIX, "c", AudioRate },
{ "audiolength", BUILTIN_FUNC_PREFIX, "c", AudioLength }, // Fixme: Add int64 to script
{ "audiolengthlo", BUILTIN_FUNC_PREFIX, "c[]i", AudioLengthLo }, // audiolength%i
{ "audiolengthhi", BUILTIN_FUNC_PREFIX, "c[]i", AudioLengthHi }, // audiolength/i
{ "audiolengths", BUILTIN_FUNC_PREFIX, "c", AudioLengthS }, // as a string
{ "audiolengthf", BUILTIN_FUNC_PREFIX, "c", AudioLengthF }, // at least this will give an order of the size
{ "audioduration", BUILTIN_FUNC_PREFIX, "c", AudioDuration }, // In seconds
{ "audiochannels", BUILTIN_FUNC_PREFIX, "c", AudioChannels },
{ "audiobits", BUILTIN_FUNC_PREFIX, "c", AudioBits },
{ "IsAudioFloat", BUILTIN_FUNC_PREFIX, "c", IsAudioFloat },
{ "IsAudioInt", BUILTIN_FUNC_PREFIX, "c", IsAudioInt },
{ "IsChannelMaskKnown", BUILTIN_FUNC_PREFIX, "c", IsChannelMaskKnown },
{ "GetChannelMask", BUILTIN_FUNC_PREFIX, "c", GetChannelMask }, // SetChannelMask: see in audio.cpp
{ "IsRGB", BUILTIN_FUNC_PREFIX, "c", IsRGB },
{ "IsYUY2", BUILTIN_FUNC_PREFIX, "c", IsYUY2 },
{ "IsYUV", BUILTIN_FUNC_PREFIX, "c", IsYUV },
{ "IsY8", BUILTIN_FUNC_PREFIX, "c", IsY8 },
{ "IsYV12", BUILTIN_FUNC_PREFIX, "c", IsYV12 },
{ "IsYV16", BUILTIN_FUNC_PREFIX, "c", IsYV16 },
{ "IsYV24", BUILTIN_FUNC_PREFIX, "c", IsYV24 },
{ "IsYV411", BUILTIN_FUNC_PREFIX, "c", IsYV411 },
{ "IsPlanar", BUILTIN_FUNC_PREFIX, "c", IsPlanar },
{ "IsInterleaved", BUILTIN_FUNC_PREFIX, "c", IsInterleaved },
{ "IsRGB24", BUILTIN_FUNC_PREFIX, "c", IsRGB24 },
{ "IsRGB32", BUILTIN_FUNC_PREFIX, "c", IsRGB32 },
{ "IsFieldBased", BUILTIN_FUNC_PREFIX, "c", IsFieldBased },
{ "IsFrameBased", BUILTIN_FUNC_PREFIX, "c", IsFrameBased },
{ "GetParity", BUILTIN_FUNC_PREFIX, "c[n]i", GetParity },
{ "String", BUILTIN_FUNC_PREFIX, ".[]s", String },
{ "Hex", BUILTIN_FUNC_PREFIX, "i[width]i", Hex }, // avs+ 20180222 new width parameter
{ "Func", BUILTIN_FUNC_PREFIX, "n", Func },
{ "Format", BUILTIN_FUNC_PREFIX, "s.*", FormatString },
{ "IsBool", BUILTIN_FUNC_PREFIX, ".", IsBool },
{ "IsInt", BUILTIN_FUNC_PREFIX, ".", IsInt },
{ "IsFloat", BUILTIN_FUNC_PREFIX, ".", IsFloat },
{ "IsString", BUILTIN_FUNC_PREFIX, ".", IsString },
{ "IsClip", BUILTIN_FUNC_PREFIX, ".", IsClip },
{ "IsFunction", BUILTIN_FUNC_PREFIX, ".", IsFunction },
{ "Defined", BUILTIN_FUNC_PREFIX, ".", Defined },
{ "TypeName", BUILTIN_FUNC_PREFIX, ".", TypeName },
{ "Default", BUILTIN_FUNC_PREFIX, "..", Default },
{ "Eval", BUILTIN_FUNC_PREFIX, "s[name]s", Eval },
{ "Eval", BUILTIN_FUNC_PREFIX, "cs[name]s", EvalOop },
{ "Apply", BUILTIN_FUNC_PREFIX, "s.*", Apply },
{ "Import", BUILTIN_FUNC_PREFIX, "s+[utf8]b", Import },
{ "Assert", BUILTIN_FUNC_PREFIX, "b[message]s", Assert },
{ "Assert", BUILTIN_FUNC_PREFIX, "s", AssertEval },
{ "SetMemoryMax", BUILTIN_FUNC_PREFIX, "[]i[type]i[index]i", SetMemoryMax }, // Neo
{ "SetWorkingDir", BUILTIN_FUNC_PREFIX, "s", SetWorkingDir },
{ "Exist", BUILTIN_FUNC_PREFIX, "s[utf8]b", Exist },
{ "Chr", BUILTIN_FUNC_PREFIX, "i", AVSChr },
{ "Ord", BUILTIN_FUNC_PREFIX, "s", AVSOrd },
{ "Time", BUILTIN_FUNC_PREFIX, "s", AVSTime },
{ "Spline", BUILTIN_FUNC_PREFIX, "[x]ff+[cubic]b", Spline },
{ "int", BUILTIN_FUNC_PREFIX, "f", Int },
{ "frac", BUILTIN_FUNC_PREFIX, "f", Frac},
{ "float", BUILTIN_FUNC_PREFIX, "f",Float},
{ "value", BUILTIN_FUNC_PREFIX, "s",Value},
{ "hexvalue", BUILTIN_FUNC_PREFIX, "s[pos]i",HexValue}, // avs+ 20180222 new pos parameter
{ "VersionNumber", BUILTIN_FUNC_PREFIX, "", VersionNumber },
{ "VersionString", BUILTIN_FUNC_PREFIX, "", VersionString },
{ "IsVersionOrGreater", BUILTIN_FUNC_PREFIX, "[majorversion]i[minorVersion]i[bugfixVersion]i", IsVersionOrGreater },
{ "HasVideo", BUILTIN_FUNC_PREFIX, "c", HasVideo },
{ "HasAudio", BUILTIN_FUNC_PREFIX, "c", HasAudio },
{ "Min", BUILTIN_FUNC_PREFIX, "f+", AvsMin },
{ "Max", BUILTIN_FUNC_PREFIX, "f+", AvsMax },
{ "ScriptName", BUILTIN_FUNC_PREFIX, "", ScriptName },
{ "ScriptFile", BUILTIN_FUNC_PREFIX, "", ScriptFile },
{ "ScriptDir", BUILTIN_FUNC_PREFIX, "", ScriptDir },
{ "ScriptNameUtf8", BUILTIN_FUNC_PREFIX, "", ScriptNameUtf8 },
{ "ScriptFileUtf8", BUILTIN_FUNC_PREFIX, "", ScriptFileUtf8 },
{ "ScriptDirUtf8", BUILTIN_FUNC_PREFIX, "", ScriptDirUtf8 },
{ "PixelType", BUILTIN_FUNC_PREFIX, "c", PixelType },
{ "AddAutoloadDir", BUILTIN_FUNC_PREFIX, "s[toFront]b", AddAutoloadDir },
{ "ClearAutoloadDirs", BUILTIN_FUNC_PREFIX, "", ClearAutoloadDirs },
{ "AutoloadPlugins", BUILTIN_FUNC_PREFIX, "", AutoloadPlugins },
{ "FunctionExists", BUILTIN_FUNC_PREFIX, "s", FunctionExists },
{ "InternalFunctionExists", BUILTIN_FUNC_PREFIX, "s", InternalFunctionExists },
{ "SetFilterMTMode", BUILTIN_FUNC_PREFIX, "si[force]b", SetFilterMTMode },
{ "Prefetch", BUILTIN_FUNC_PREFIX, "c[threads]i[frames]i", Prefetcher::Create },
{ "SetLogParams", BUILTIN_FUNC_PREFIX, "[target]s[level]i", SetLogParams },
{ "LogMsg", BUILTIN_FUNC_PREFIX, "si", LogMsg },
{ "SetCacheMode", BUILTIN_FUNC_PREFIX, "[mode]i", SetCacheMode }, // Neo
{ "SetDeviceOpt", BUILTIN_FUNC_PREFIX, "[opt]i[val]i", SetDeviceOpt }, // Neo
{ "SetMaxCPU", BUILTIN_FUNC_PREFIX, "s", SetMaxCPU }, // 20200331
{ "IsY", BUILTIN_FUNC_PREFIX, "c", IsY },
{ "Is420", BUILTIN_FUNC_PREFIX, "c", Is420 },
{ "Is422", BUILTIN_FUNC_PREFIX, "c", Is422 },
{ "Is444", BUILTIN_FUNC_PREFIX, "c", Is444 },
{ "IsRGB48", BUILTIN_FUNC_PREFIX, "c", IsRGB48 },
{ "IsRGB64", BUILTIN_FUNC_PREFIX, "c", IsRGB64 },
{ "ComponentSize", BUILTIN_FUNC_PREFIX, "c", ComponentSize },
{ "BitsPerComponent", BUILTIN_FUNC_PREFIX, "c", BitsPerComponent },
{ "IsYUVA", BUILTIN_FUNC_PREFIX, "c", IsYUVA },
{ "IsPlanarRGB", BUILTIN_FUNC_PREFIX, "c", IsPlanarRGB },
{ "IsPlanarRGBA", BUILTIN_FUNC_PREFIX, "c", IsPlanarRGBA },
{ "ColorSpaceNameToPixelType", BUILTIN_FUNC_PREFIX, "s", ColorSpaceNameToPixelType },
{ "NumComponents", BUILTIN_FUNC_PREFIX, "c", NumComponents }, // r2348+
{ "HasAlpha", BUILTIN_FUNC_PREFIX, "c", HasAlpha }, // r2348+
{ "IsPackedRGB", BUILTIN_FUNC_PREFIX, "c", IsPackedRGB }, // r2348+
{ "IsVideoFloat", BUILTIN_FUNC_PREFIX, "c", IsVideoFloat }, // r2435+
{ "GetProcessInfo", BUILTIN_FUNC_PREFIX, "[type]i", GetProcessInfo }, // 170526-
#ifdef AVS_WINDOWS
{ "StrToUtf8", BUILTIN_FUNC_PREFIX, "s", StrToUtf8 }, // 170601-
{ "StrFromUtf8", BUILTIN_FUNC_PREFIX, "s", StrFromUtf8 }, // 170601-
#endif
{ "IsFloatUvZeroBased", BUILTIN_FUNC_PREFIX, "", IsFloatUvZeroBased }, // 180516-
{ "BuildPixelType", BUILTIN_FUNC_PREFIX, "[family]s[bits]i[chroma]i[compat]b[oldnames]b[sample_clip]c", BuildPixelType }, // 180517-
{ "VarExist", BUILTIN_FUNC_PREFIX, "s", VarExist }, // 180606-
// Creates script array from zero or more anything.
// Direct array constant syntax e.g. x = [arg1,arg2,...] is translated to x = Array(arg1,arg2,...)
{ "Array", BUILTIN_FUNC_PREFIX, ".*", ArrayCreate },
{ "IsArray", BUILTIN_FUNC_PREFIX, ".", IsArray },
// dictionary type array indexing
{ "ArrayGet", BUILTIN_FUNC_PREFIX, ".s", ArrayGet },
// classic array indexing background helper: e.g. a[3,4] -> ArrayGet(a, [2,3])
{ "ArrayGet", BUILTIN_FUNC_PREFIX, ".i+", ArrayGet }, // .+i+ syntax is not possible.
// length can be zero
{ "ArraySize", BUILTIN_FUNC_PREFIX, ".", ArraySize },
{ "ArrayIns", BUILTIN_FUNC_PREFIX, "..i+", ArrayIns, (void*)0 },
{ "ArrayAdd", BUILTIN_FUNC_PREFIX, "..i*", ArrayIns, (void*)1 },
{ "ArraySet", BUILTIN_FUNC_PREFIX, "..i+", ArrayIns, (void*)2 },
{ "ArrayDel", BUILTIN_FUNC_PREFIX, ".i+", ArrayIns, (void*)3 },
/*
{ "IsArrayOf", BUILTIN_FUNC_PREFIX, ".s", IsArrayOf },
*/
{ 0 }
};
/**********************************
******* Script Function ******
*********************************/
ScriptFunction::ScriptFunction( const PExpression& _body, const bool* _param_floats,
const char** _param_names, int param_count )
: body(_body)
{
param_floats = new bool[param_count];
memcpy(param_floats, _param_floats, param_count * sizeof(const bool));
param_names = new const char* [param_count];
memcpy(param_names, _param_names, param_count * sizeof(const char*));
}
AVSValue ScriptFunction::Execute(AVSValue args, void* user_data, IScriptEnvironment* env)
{
ScriptFunction* self = (ScriptFunction*)user_data;
env->PushContext();
for (int i=0; i<args.ArraySize(); ++i)
env->SetVar(self->param_names[i], // Force float args that are actually int to be float
(self->param_floats[i] && args[i].IsInt()) ? float(args[i].AsInt()) : args[i]);
AVSValue result;
try {
result = self->body->Evaluate(env);
}
catch (...) {
env->PopContext();
throw;
}
env->PopContext();
return result;
}
void ScriptFunction::Delete(void* self, IScriptEnvironment*)
{
delete (ScriptFunction*)self;
}
/***********************************
******* Helper Functions ******
**********************************/
#ifdef AVS_WINDOWS
void CWDChanger::Init(const wchar_t* new_cwd)
{
// works in unicode internally
uint32_t cwdLen = GetCurrentDirectoryW(0, NULL);
old_working_directory = std::make_unique<wchar_t[]>(cwdLen); // instead of new wchar_t[cwdLen];
uint32_t save_cwd_success = GetCurrentDirectoryW(cwdLen, old_working_directory.get());
bool set_cwd_success = SetCurrentDirectoryW(new_cwd);
restore = (save_cwd_success && set_cwd_success);
}
CWDChanger::CWDChanger(const wchar_t* new_cwd)
{
Init(new_cwd);
}
CWDChanger::CWDChanger(const char* new_cwd)
{
auto new_cwd_w = AnsiToWideChar(new_cwd);
Init(new_cwd_w.get());
}
CWDChanger::~CWDChanger(void)
{
if (restore)
SetCurrentDirectoryW(old_working_directory.get());
}
DllDirChanger::DllDirChanger(const char* new_dir)
{
uint32_t len = GetDllDirectory (0, NULL);
old_directory = std::make_unique<char[]>(len + 1); // instead of new char[len+1]
uint32_t save_success = GetDllDirectory (len, old_directory.get());
bool set_success = SetDllDirectory(new_dir);
restore = (save_success && set_success);
}
DllDirChanger::~DllDirChanger(void)
{
if (restore)
SetDllDirectory(old_directory.get());
}
#else // copied from AvxSynth
CWDChanger::CWDChanger(const char* new_cwd)
{
char* path = getcwd(old_working_directory, FILENAME_MAX);
bool save_cwd_success = (NULL != path);
bool set_cwd_success = (0 == chdir(new_cwd));
restore = (save_cwd_success && set_cwd_success);
}
CWDChanger::~CWDChanger(void)
{
if (restore)
chdir(old_working_directory);
}
#endif
AVSValue Assert(AVSValue args, void*, IScriptEnvironment* env)
{
if (!args[0].AsBool())
env->ThrowError("%s", args[1].Defined() ? args[1].AsString() : "Assert: assertion failed");
return AVSValue();
}
AVSValue AssertEval(AVSValue args, void*, IScriptEnvironment* env)
{
const char* pred = args[0].AsString();
AVSValue eval_args[] = { args[0].AsString(), "asserted expression" };
AVSValue val = env->Invoke("Eval", AVSValue(eval_args, 2));
if (!val.IsBool())
env->ThrowError("Assert: expression did not evaluate to true or false: \"%s\"", pred);
if (!val.AsBool())
env->ThrowError("Assert: assertion failed: \"%s\"", pred);
return AVSValue();
}
AVSValue Eval(AVSValue args, void*, IScriptEnvironment* env)
{
const char *filename = args[1].AsString(0);
if (filename) filename = env->SaveString(filename);
ScriptParser parser(env, args[0].AsString(), filename);
PExpression exp = parser.Parse();
return exp->Evaluate(env);
}
AVSValue Apply(AVSValue args, void*, IScriptEnvironment* env)
{
return env->Invoke(args[0].AsString(), args[1]);
}
AVSValue EvalOop(AVSValue args, void*, IScriptEnvironment* env)
{
AVSValue prev_last = env->GetVarDef("last"); // Store previous last
env->SetVar("last", args[0]); // Set implicit last
AVSValue result;
try {
result = Eval(AVSValue(&args[1], 2), 0, env);
}
catch(...) {
env->SetVar("last", prev_last); // Restore implicit last
throw;
}
env->SetVar("last", prev_last); // Restore implicit last
return result;
}
AVSValue Import(AVSValue args, void*, IScriptEnvironment* env)
{
// called as s+ or s+[Utf8]b
const bool bHasUTF8param = args.IsArray() && args.ArraySize() == 2 && args[1].IsBool();
const bool bUtf8 = bHasUTF8param ? args[1].AsBool(false) : false;
args = args[0];
AVSValue result;
InternalEnvironment *envi = static_cast<InternalEnvironment*>(env);
const bool MainScript = (envi->IncrImportDepth() == 1);
AVSValue lastScriptName = env->GetVarDef("$ScriptName$");
AVSValue lastScriptFile = env->GetVarDef("$ScriptFile$");
AVSValue lastScriptDir = env->GetVarDef("$ScriptDir$");
AVSValue lastScriptNameUtf8 = env->GetVarDef("$ScriptNameUtf8$");
AVSValue lastScriptFileUtf8 = env->GetVarDef("$ScriptFileUtf8$");
AVSValue lastScriptDirUtf8 = env->GetVarDef("$ScriptDirUtf8$");
for (int i = 0; i < args.ArraySize(); ++i) {
const char* script_name = args[i].AsString();
#ifdef AVS_WINDOWS
/* Linux, macOS, pretty much every OS aside from Windows uses
UTF-8 pervasively and by default, making all the Ansi<->Unicode
stuff we have to specially handle on Windows (which uses UTF-16
when it does 'Unicode', further complicating things if you don't
force UTF-8) irrelevant. */
// Handling utf8 and ansi, working in wchar_t internally
// filename and path can be full unicode
// unicode input can come from CAVIFileSynth
std::unique_ptr<wchar_t[]> full_path_w;
wchar_t *file_part_w;
// make wchar_t full path strnig from either ansi or utf8
auto script_name_w = !bUtf8 ? AnsiToWideChar(script_name) : Utf8ToWideChar(script_name);
// Long (>MAX_PATH) path support starting in Windows 10, version 1607.
if (wcschr(script_name_w.get(), '\\') || wcschr(script_name_w.get(), '/')) {
DWORD len = GetFullPathNameW(script_name_w.get(), 0, NULL, NULL); // buffer size for path + terminating zero
full_path_w = std::make_unique<wchar_t[]>(len);
len = GetFullPathNameW(script_name_w.get(), len, full_path_w.get(), &file_part_w);
if (len == 0)
env->ThrowError("Import: unable to open \"%s\" (path invalid?), error=0x%x", script_name, GetLastError());
}
else {
DWORD len = SearchPathW(NULL, script_name_w.get(), NULL, 0, NULL, NULL); // buffer size for path + terminating zero
full_path_w = std::make_unique<wchar_t[]>(len);
len = SearchPathW(NULL, script_name_w.get(), NULL, len, full_path_w.get(), &file_part_w);
if (len == 0)
env->ThrowError("Import: unable to locate \"%s\" (try specifying a path), error=0x%x", script_name, GetLastError());
}
// back to 8 bit Ansi and Utf8
auto full_path = WideCharToAnsi(full_path_w.get());
auto full_path_utf8 = WideCharToUtf8(full_path_w.get());
auto file_part = WideCharToAnsi(file_part_w);
auto file_part_utf8 = WideCharToUtf8(file_part_w);
size_t dir_part_len = wcslen(full_path_w.get()) - wcslen(file_part_w);
auto dir_part = WideCharToAnsi_maxn(full_path_w.get(), dir_part_len);
auto dir_part_utf8 = WideCharToUtf8_maxn(full_path_w.get(), dir_part_len);
// supply L"\\\\?\\" if necessary for long file path support
std::wstring full_path_ex = std::wstring(full_path_w.get());
if (full_path_ex.length() > FILENAME_MAX && full_path_ex.substr(0, 4) != L"\\\\?\\")
full_path_ex = L"\\\\?\\" + full_path_ex;
HANDLE h = ::CreateFileW(full_path_ex.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (h == INVALID_HANDLE_VALUE)
env->ThrowError("Import: couldn't open \"%s\"", full_path.get());
env->SetGlobalVar("$ScriptName$", env->SaveString(full_path.get()));
env->SetGlobalVar("$ScriptFile$", env->SaveString(file_part.get()));
env->SetGlobalVar("$ScriptDir$", env->SaveString(dir_part.get()));
env->SetGlobalVar("$ScriptNameUtf8$", env->SaveString(full_path_utf8.get()));
env->SetGlobalVar("$ScriptFileUtf8$", env->SaveString(file_part_utf8.get()));
env->SetGlobalVar("$ScriptDirUtf8$", env->SaveString(dir_part_utf8.get()));
if (MainScript)
{
env->SetGlobalVar("$MainScriptName$", env->SaveString(full_path.get()));
env->SetGlobalVar("$MainScriptFile$", env->SaveString(file_part.get()));
env->SetGlobalVar("$MainScriptDir$", env->SaveString(dir_part.get()));
env->SetGlobalVar("$MainScriptNameUtf8$", env->SaveString(full_path_utf8.get()));
env->SetGlobalVar("$MainScriptFileUtf8$", env->SaveString(file_part_utf8.get()));
env->SetGlobalVar("$MainScriptDirUtf8$", env->SaveString(dir_part_utf8.get()));
}
*file_part_w = 0; // trunc full_path_w to dir-only
CWDChanger change_cwd(full_path_w.get());
// end of filename parsing / file open things
DWORD size = GetFileSize(h, NULL);
std::vector<char> buf(size + 1, 0);
bool status = ReadFile(h, buf.data(), size, &size, NULL);
CloseHandle(h);
if (!status)
env->ThrowError("Import: unable to read \"%s\"", script_name);
// Give poor Unicode users a hint they need to use ANSI encoding import"
if (size >= 2) {
unsigned char* q = reinterpret_cast<unsigned char*>(buf.data());
if ((q[0] == 0xFF && q[1] == 0xFE) || (q[0] == 0xFE && q[1] == 0xFF))
env->ThrowError("Import: Unicode source files are not supported, "
"re-save script with ANSI or UTF8 w/o BOM encoding! : \"%s\"", script_name);
if (q[0] == 0xEF && q[1] == 0xBB && q[2] == 0xBF)
env->ThrowError("Import: UTF-8 source files with BOM are not supported, "
"re-save script with ANSI or UTF8 w/o BOM encoding! : \"%s\"", script_name);
}
#else // adapted from AvxSynth
std::string file_part = fs::path(script_name).filename().string();
std::string full_path = fs::path(script_name).remove_filename();
std::string dir_part = fs::path(script_name).parent_path();
FILE* h = fopen(script_name, "r");
if(NULL == h)
env->ThrowError("Import: couldn't open \"%s\"", script_name );
env->SetGlobalVar("$ScriptName$", env->SaveString(script_name));
env->SetGlobalVar("$ScriptFile$", env->SaveString(file_part.c_str()));
env->SetGlobalVar("$ScriptDir$", env->SaveString(full_path.c_str()));
env->SetGlobalVar("$ScriptNameUtf8$", env->SaveString(script_name));
env->SetGlobalVar("$ScriptFileUtf8$", env->SaveString(file_part.c_str()));
env->SetGlobalVar("$ScriptDirUtf8$", env->SaveString(full_path.c_str()));
if (MainScript)
{
env->SetGlobalVar("$MainScriptName$", env->SaveString(script_name));
env->SetGlobalVar("$MainScriptFile$", env->SaveString(file_part.c_str()));
env->SetGlobalVar("$MainScriptDir$", env->SaveString(full_path.c_str()));
env->SetGlobalVar("$MainScriptNameUtf8$", env->SaveString(script_name));
env->SetGlobalVar("$MainScriptFileUtf8$", env->SaveString(file_part.c_str()));
env->SetGlobalVar("$MainScriptDirUtf8$", env->SaveString(full_path.c_str()));
}
//*file_part = 0; // trunc full_path to dir-only
CWDChanger change_cwd(full_path.c_str());
// end of filename parsing / file open things
fseek(h, 0, SEEK_END);
size_t size = ftell(h);
fseek(h, 0, SEEK_SET);
std::vector<char> buf(size + 1, 0);
if(size != fread(buf.data(), 1, size, h))
env->ThrowError("Import: unable to read \"%s\"", script_name);
fclose(h);
#endif
buf[size] = 0;
AVSValue eval_args[] = { buf.data(), script_name };
result = env->Invoke("Eval", AVSValue(eval_args, 2));
//env->ThrowError("Import: test %s size %d\n", buf.data(), (int)size);
}
env->SetGlobalVar("$ScriptName$", lastScriptName);
env->SetGlobalVar("$ScriptFile$", lastScriptFile);
env->SetGlobalVar("$ScriptDir$", lastScriptDir);
env->SetGlobalVar("$ScriptNameUtf8$", lastScriptNameUtf8);
env->SetGlobalVar("$ScriptFileUtf8$", lastScriptFileUtf8);
env->SetGlobalVar("$ScriptDirUtf8$", lastScriptDirUtf8);
envi->DecrImportDepth();
return result;
}
AVSValue ScriptName(AVSValue args, void*, IScriptEnvironment* env) { return env->GetVarDef("$ScriptName$"); }
AVSValue ScriptFile(AVSValue args, void*, IScriptEnvironment* env) { return env->GetVarDef("$ScriptFile$"); }
AVSValue ScriptDir (AVSValue args, void*, IScriptEnvironment* env) { return env->GetVarDef("$ScriptDir$" ); }
AVSValue ScriptNameUtf8(AVSValue args, void*, IScriptEnvironment* env) { return env->GetVarDef("$ScriptNameUtf8$"); }
AVSValue ScriptFileUtf8(AVSValue args, void*, IScriptEnvironment* env) { return env->GetVarDef("$ScriptFileUtf8$"); }
AVSValue ScriptDirUtf8(AVSValue args, void*, IScriptEnvironment* env) { return env->GetVarDef("$ScriptDirUtf8$"); }
AVSValue SetWorkingDir(AVSValue args, void*, IScriptEnvironment* env) { return env->SetWorkingDir(args[0].AsString()); }
AVSValue Muldiv(AVSValue args, void*, IScriptEnvironment* ) { return int(MulDiv(args[0].AsInt(), args[1].AsInt(), args[2].AsInt())); }
AVSValue Floor(AVSValue args, void*, IScriptEnvironment* ) { return int(floor(args[0].AsFloat())); }
AVSValue Ceil(AVSValue args, void*, IScriptEnvironment* ) { return int(ceil(args[0].AsFloat())); }
AVSValue Round(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsFloat()<0 ? -int(-args[0].AsFloat()+.5) : int(args[0].AsFloat()+.5); }
AVSValue Acos(AVSValue args, void* , IScriptEnvironment* ) { return acos(args[0].AsFloat()); }
AVSValue Asin(AVSValue args, void* , IScriptEnvironment* ) { return asin(args[0].AsFloat()); }
AVSValue Atan(AVSValue args, void* , IScriptEnvironment* ) { return atan(args[0].AsFloat()); }
AVSValue Atan2(AVSValue args, void* , IScriptEnvironment* ) { return atan2(args[0].AsFloat(), args[1].AsFloat()); }
AVSValue Cos(AVSValue args, void* , IScriptEnvironment* ) { return cos(args[0].AsFloat()); }
AVSValue Cosh(AVSValue args, void* , IScriptEnvironment* ) { return cosh(args[0].AsFloat()); }
AVSValue Exp(AVSValue args, void* , IScriptEnvironment* ) { return exp(args[0].AsFloat()); }
AVSValue Fmod(AVSValue args, void* , IScriptEnvironment* ) { return fmod(args[0].AsFloat(), args[1].AsFloat()); }
AVSValue Log(AVSValue args, void* , IScriptEnvironment* ) { return log(args[0].AsFloat()); }
AVSValue Log10(AVSValue args, void* , IScriptEnvironment* ) { return log10(args[0].AsFloat()); }
AVSValue Pow(AVSValue args, void* , IScriptEnvironment* ) { return pow(args[0].AsFloat(),args[1].AsFloat()); }
AVSValue Sin(AVSValue args, void* , IScriptEnvironment* ) { return sin(args[0].AsFloat()); }
AVSValue Sinh(AVSValue args, void* , IScriptEnvironment* ) { return sinh(args[0].AsFloat()); }
AVSValue Tan(AVSValue args, void* , IScriptEnvironment* ) { return tan(args[0].AsFloat()); }
AVSValue Tanh(AVSValue args, void* , IScriptEnvironment* ) { return tanh(args[0].AsFloat()); }
AVSValue Sqrt(AVSValue args, void* , IScriptEnvironment* ) { return sqrt(args[0].AsFloat()); }
AVSValue Abs(AVSValue args, void* , IScriptEnvironment* ) { return abs(args[0].AsInt()); }
AVSValue FAbs(AVSValue args, void* , IScriptEnvironment* ) { return fabs(args[0].AsFloat()); }
AVSValue Pi(AVSValue args, void* , IScriptEnvironment* ) { return 3.14159265358979324; }
#ifdef OPT_ScriptFunctionTau
AVSValue Tau(AVSValue args, void* , IScriptEnvironment* ) { return 6.28318530717958648; }
#endif
AVSValue Sign(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsFloat()==0 ? 0 : args[0].AsFloat() > 0 ? 1 : -1; }
AVSValue BitAnd(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsInt() & args[1].AsInt(); }
AVSValue BitNot(AVSValue args, void*, IScriptEnvironment* ) { return ~args[0].AsInt(); }
AVSValue BitOr(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsInt() | args[1].AsInt(); }
AVSValue BitXor(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsInt() ^ args[1].AsInt(); }
AVSValue BitLShift(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsInt() << args[1].AsInt(); }
AVSValue BitRShiftL(AVSValue args, void*, IScriptEnvironment* ) { return int(unsigned(args[0].AsInt()) >> unsigned(args[1].AsInt())); }
AVSValue BitRShiftA(AVSValue args, void*, IScriptEnvironment* ) { return args[0].AsInt() >> args[1].AsInt(); }
static unsigned int a_rol(unsigned int value, int shift) {
if ((shift &= sizeof(value)*8 - 1) == 0)
return value;
return (value << shift) | (value >> (sizeof(value)*8 - shift));
}
static unsigned int a_ror(unsigned int value, int shift) {
if ((shift &= sizeof(value)*8 - 1) == 0)
return value;
return (value >> shift) | (value << (sizeof(value)*8 - shift));
}
static int a_btc(int value, int bit) {
value ^= 1 << bit;
return value;
}
static int a_btr(int value, int bit) {
value &= ~(1 << bit);
return value;
}
static int a_bts(int value, int bit) {
value |= (1 << bit);
return value;
}
static bool a_bt (int value, int bit) {
return (value & (1 << bit)) ? true : false;
}
AVSValue BitRotateL(AVSValue args, void*, IScriptEnvironment* ) { return (int)a_rol((unsigned int)args[0].AsInt(), args[1].AsInt()); }
AVSValue BitRotateR(AVSValue args, void*, IScriptEnvironment* ) { return (int)a_ror((unsigned int)args[0].AsInt(), args[1].AsInt()); }
AVSValue BitChg(AVSValue args, void*, IScriptEnvironment* ) { return a_btc(args[0].AsInt(), args[1].AsInt()); }
AVSValue BitClr(AVSValue args, void*, IScriptEnvironment* ) { return a_btr(args[0].AsInt(), args[1].AsInt()); }
AVSValue BitSet(AVSValue args, void*, IScriptEnvironment* ) { return a_bts(args[0].AsInt(), args[1].AsInt()); }
AVSValue BitTst(AVSValue args, void*, IScriptEnvironment* ) { return a_bt (args[0].AsInt(), args[1].AsInt()); }
static int numberOfSetBits(uint32_t i)
{
i = i - ((i >> 1) & 0x55555555);
i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
return (((i + (i >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
}
AVSValue BitSetCount(AVSValue args, void*, IScriptEnvironment*) {
if (args[0].IsInt())
return numberOfSetBits(args[0].AsInt());
int count = 0;
for (int i = 0; i < args[0].ArraySize(); i++)
count += numberOfSetBits(args[0][i].AsInt());
return count;
}
AVSValue UCase(AVSValue args, void*, IScriptEnvironment* env) { return _strupr(env->SaveString(args[0].AsString())); }
AVSValue LCase(AVSValue args, void*, IScriptEnvironment* env) { return _strlwr(env->SaveString(args[0].AsString())); }
AVSValue StrLen(AVSValue args, void*, IScriptEnvironment* ) { return int(strlen(args[0].AsString())); }
AVSValue RevStr(AVSValue args, void*, IScriptEnvironment* env) { return _strrev(env->SaveString(args[0].AsString())); }
AVSValue LeftStr(AVSValue args, void*, IScriptEnvironment* env)
{
const int count = args[1].AsInt();
if (count < 0)
env->ThrowError("LeftStr: Negative character count not allowed");
char *result = new(std::nothrow) char[count+1];
if (!result) env->ThrowError("LeftStr: malloc failure!");
*result = 0;
strncat(result, args[0].AsString(), count);
AVSValue ret = env->SaveString(result);
delete[] result;
return ret;
}
AVSValue MidStr(AVSValue args, void*, IScriptEnvironment* env)
{
const int maxlen = (int)strlen(args[0].AsString());
if (args[1].AsInt() < 1)
env->ThrowError("MidStr: Illegal character location");
int len = args[2].AsInt(maxlen);
if (len < 0)
env->ThrowError("MidStr: Illegal character count");
int offset = args[1].AsInt() - 1;
if (maxlen <= offset) { offset = 0; len = 0;}
char *result = new(std::nothrow) char[len+1];
if (!result) env->ThrowError("MidStr: malloc failure!");
*result = 0;
strncat(result, args[0].AsString()+offset, len);
AVSValue ret = env->SaveString(result);
delete[] result;
return ret;
}
AVSValue RightStr(AVSValue args, void*, IScriptEnvironment* env)
{
if (args[1].AsInt() < 0)
env->ThrowError("RightStr: Negative character count not allowed");
int offset = (int)strlen(args[0].AsString()) - args[1].AsInt();
if (offset < 0) offset = 0;
char *result = new(std::nothrow) char[args[1].AsInt()+1];
if (!result) env->ThrowError("RightStr: malloc failure!");
*result = 0;
strncat(result, args[0].AsString()+offset, args[1].AsInt());
AVSValue ret = env->SaveString(result);
delete[] result;
return ret;
}
AVSValue ReplaceStr(AVSValue args, void*, IScriptEnvironment* env) {
char const * const original = args[0].AsString();
char const * const pattern = args[1].AsString();
char const * const replacement = args[2].AsString();
const bool case_insensitive = args[3].AsBool(false);
const size_t replace_len = strlen(replacement);
const size_t pattern_len = strlen(pattern);
const size_t orig_len = strlen(original);
size_t pattern_count = 0;
const char * orig_ptr;
const char * pattern_location;
if (0 == pattern_len)
return original;
if (case_insensitive) {
char *original_lower = new(std::nothrow) char[sizeof(char) * (orig_len + 1)];
if (!original_lower) env->ThrowError("ReplaceStr: malloc failure!");
char *pattern_lower = new(std::nothrow) char[sizeof(char) * (pattern_len + 1)];
if (!pattern_lower) env->ThrowError("ReplaceStr: malloc failure!");
// make them lowercase for comparison
strcpy(original_lower, original);
strcpy(pattern_lower, pattern);
#ifdef MSVC
// works fine also for accented ANSI characters
_locale_t locale = _create_locale(LC_ALL, ".ACP"); // Sets the locale to the ANSI code page obtained from the operating system.
_strlwr_l(original_lower, locale);
_strlwr_l(pattern_lower, locale);
_free_locale(locale);
#else
_strlwr(original_lower);
_strlwr(pattern_lower);
#endif
// find how many times the _lowercased_ pattern occurs in the _lowercased_ original string
for (orig_ptr = original_lower; (pattern_location = strstr(orig_ptr, pattern_lower)); orig_ptr = pattern_location + pattern_len)
{
pattern_count++;
}
// allocate memory for the new string
size_t const retlen = orig_len + pattern_count * (replace_len - pattern_len);
char *result = new(std::nothrow) char[sizeof(char) * (retlen + 1)];
if (!result) env->ThrowError("ReplaceStr: malloc failure!");
*result = 0;
// copy the original string,
// replacing all the instances of the pattern
const char * orig_upper_ptr;
char * result_ptr = result;
// handling dual pointer set: orig, uppercase
for (orig_ptr = original, orig_upper_ptr = original_lower;
(pattern_location = strstr(orig_upper_ptr, pattern_lower));
orig_upper_ptr = pattern_location + pattern_len, orig_ptr = original + (orig_upper_ptr - original_lower))
{
const size_t skiplen = pattern_location - orig_upper_ptr;
// copy the section until the occurence of the pattern
strncpy(result_ptr, orig_ptr, skiplen);
result_ptr += skiplen;
// copy the replacement
strncpy(result_ptr, replacement, replace_len);
result_ptr += replace_len;
}
// copy rest
strcpy(result_ptr, orig_ptr);
AVSValue ret = env->SaveString(result);
delete[] result;
delete[] original_lower;
delete[] pattern_lower;
return ret;
}
// old case sensitive version
// find how many times the pattern occurs in the original string
for (orig_ptr = original; (pattern_location = strstr(orig_ptr, pattern)); orig_ptr = pattern_location + pattern_len)
{
pattern_count++;
}
// allocate memory for the new string
size_t const retlen = orig_len + pattern_count * (replace_len - pattern_len);
char *result = new(std::nothrow) char[sizeof(char) * (retlen + 1)];
if (!result) env->ThrowError("ReplaceStr: malloc failure!");
*result = 0;
// copy the original string,
// replacing all the instances of the pattern
char * result_ptr = result;
for (orig_ptr = original; (pattern_location = strstr(orig_ptr, pattern)); orig_ptr = pattern_location + pattern_len)
{
const size_t skiplen = pattern_location - orig_ptr;
// copy the section until the occurence of the pattern
strncpy(result_ptr, orig_ptr, skiplen);
result_ptr += skiplen;
// copy the replacement
strncpy(result_ptr, replacement, replace_len);
result_ptr += replace_len;
}
// copy rest
strcpy(result_ptr, orig_ptr);
AVSValue ret = env->SaveString(result);
delete[] result;
return ret;
}
AVSValue TrimLeft(AVSValue args, void*, IScriptEnvironment* env)
{
char const *original = args[0].AsString();
char const *s = original;
char ch;
// space, npsp, tab
while ((ch = *s) == (char)32 || ch == (char)160 || ch == (char)9)
s++;
if (original == s)
return args[0]; // avoid SaveString if no change
return env->SaveString(s);
}
AVSValue TrimRight(AVSValue args, void*, IScriptEnvironment* env)
{
char const *original = args[0].AsString();
size_t len = strlen(original);
if (len == 0)
return args[0]; // avoid SaveString if no change
size_t orig_len = len;
char const *s = original + len;
char ch;
// space, npsp, tab
while ((len > 0) && ((ch = *--s) == (char)32 || ch == (char)160 || ch == (char)9)) {
len--;
}
if(orig_len == len)
return args[0]; // avoid SaveString if no change
if (len == 0)
return env->SaveString("");
size_t retlen = s - original + 1;
char *result = new(std::nothrow) char[sizeof(char) * (retlen + 1)];
if (!result) env->ThrowError("TrimRight: malloc failure!");
strncpy(result, original, retlen);
result[retlen] = 0;
AVSValue ret = env->SaveString(result);
delete[] result;
return ret;
}
AVSValue TrimAll(AVSValue args, void*, IScriptEnvironment* env)
{
// not simplify with calling Left/Right, avoid double SaveStrings
// like TrimLeft
char const *original = args[0].AsString();
if (!*original)
return args[0]; // avoid SaveString if no change
char ch;
// space, npsp, tab
while ((ch = *original) == (char)32 || ch == (char)160 || ch == (char)9)
original++;
// almost like TrimRight
size_t len = strlen(original);
if (len == 0)
return env->SaveString("");
size_t orig_len = len;
char const *s = original + len;
// space, npsp, tab
while ((len > 0) && ((ch = *--s) == (char)32 || ch == (char)160 || ch == (char)9))
len--;
if (orig_len == len)
return env->SaveString(original); // nothing to cut from right