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pack.bak.cpp
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pack.bak.cpp
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//
// Created by hehe on 16/9/29.
//
#include <node/node.h>
#include <node/node_object_wrap.h>
#include <node/node_buffer.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/param.h>
//#include "ext/standard/head.h"
//#include "NODEJS_string.h"
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <assert.h>
#include "pack.h"
using namespace v8;
using namespace node;
#define THROW_ERROR(bufname, x,isolate) { \
char bufname[256] = {0}; \
sprintf x; \
return isolate->ThrowException(Exception::Error (v8::String::NewFromUtf8(isolate,bufname))); \
}
#define THROW_IF_NOT(condition, text,isolate) if (!(condition)) { \
return isolate->ThrowException(Exception::Error (v8::String::NewFromUtf8(isolate,text))); \
}
#define THROW_IF_NOT_A(condition, bufname, x,isolate) if (!(condition)) { \
char bufname[256] = {0}; \
sprintf x; \
return isolate->ThrowException(Exception::Error (v8::String::NewFromUtf8(isolate,bufname))); \
}
#define TARGET (v8::Local<v8::Object> target)
#define NODEJS_ERROR( strfmt, arg ,isolate) THROW_ERROR( _buf, (_buf, (const char*)strfmt, arg), isolate)
#define INC_OUTPUTPOS(a,b,isolate) \
if ((a) < 0 || ((INT_MAX - outputpos)/((int)b)) < (a)) { \
NODEJS_ERROR( "Type %c: integer overflow in format string", code,isolate); \
return Undefined(isolate); \
} \
outputpos += (a)*(b);
#define safe_emalloc(len,objsize,setwith) malloc( len*objsize )
#define ToCString(value) (*value ? *value : "<string conversion failed>")
inline double ToDouble(v8::Local<v8::Value> value)
{
return static_cast<double>(value->NumberValue());
}
inline float ToFloat(v8::Local<v8::Value> value)
{
return static_cast<float>(value->NumberValue());
}
char *BufferData(v8::Local<v8::Value> buf_val) {
return node::Buffer::Data(buf_val);
}
size_t BufferLength(v8::Local<v8::Value> buf_val) {
return node::Buffer::Length(buf_val);
}
char *BufferData(v8::Local<v8::Object> buf_obj,v8::Isolate* isolate) {
v8::HandleScope scope(isolate);
return node::Buffer::Data(buf_obj);
}
size_t BufferLength(v8::Local<v8::Object> buf_obj,v8::Isolate* isolate) {
v8::HandleScope scope(isolate);
return node::Buffer::Length(buf_obj);
}
static int debug_mode;
/* Whether machine is little endian */
static char machine_little_endian;
/* Mapping of byte from char (8bit) to long for machine endian */
static int byte_map[1];
/* Mappings of bytes from int (machine dependant) to int for machine endian */
static int int_map[sizeof(int)];
/* Mappings of bytes from shorts (16bit) for all endian environments */
static int machine_endian_short_map[2];
static int big_endian_short_map[2];
static int little_endian_short_map[2];
/* Mappings of bytes from longs (32bit) for all endian environments */
static int machine_endian_long_map[4];
static int big_endian_long_map[4];
static int little_endian_long_map[4];
class HiPack : public ObjectWrap {
public:
static void SetDebug(int n) { debug_mode = n; }
static int IsDebug() { return debug_mode; }
static v8::Local<v8::Value> New(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::Isolate* isolate = args.GetIsolate();
v8::HandleScope scope(isolate);
HiPack* hipack = new HiPack();
hipack->Wrap(args.This());
return args.This();
}
/* {{{ NODEJS_pack
*/
static void NODEJS_pack(u_int32_t val, int size, int *map, char *output)
{
int i;
unsigned char *v;
//convert_to_long_ex(val);
v = (unsigned char *) &val;
for (i = 0; i < size; i++) {
if( IsDebug()>0 ) printf("currentValue every Byte value=%d\n", v[map[i]] );
*output++ = v[map[i]];
}
}
/* }}} */
// We define a max size, since we want to avoid any mallocs() theres are on the stack and faster.
// I think 48 is enough for 99.99% cases. Next release we might have a init option
#define MAX_FORMAT_CODES (48)
// We also store the output locally in the stack if its under 256 bytes in size, else we malloc it.
/* pack() idea stolen from Perl (implemented formats behave the same as there)
* Implemented formats are A, a, h, H, c, C, s, S, i, I, l, L, n, N, f, d, x, X, V, v, @.
*/
/* {{{ proto string pack(String format, mixed arg1 [, mixed arg2 [, mixed ...]])
Takes one or more arguments and packs them into a binary string according to the format argument
* If the first ARG is a Buffer(), is that as the output instead of creating its own buffer.
*/
static v8::Local<v8::Value> _pack(const v8::FunctionCallbackInfo<v8::Value>& argv)
{
v8::Isolate* isolate = argv.GetIsolate();
v8::EscapableHandleScope scope(isolate);
int outputpos = 0, outputsize = 0;
int num_args, i;
int currentarg = 0, firstarg = 0;
char *output = NULL;
char formatcodes[MAX_FORMAT_CODES]; // Local stored codes for faster access/ avoid mallocs
int formatargs[MAX_FORMAT_CODES]; // Local index store.
int formatcount = 0;
int formatlen;
const char *format;
bool argsFromArray = false;
bool parentBuffer = false;
Local<Object> outputBuffer;
// char localOutput[256]; wrong way,node will free the char * data ,so should use malloc or new ;
char * localOutput = new char[256];
num_args = argv.Length();
if (argv.Length() < 2 ) {
NODEJS_ERROR( "Not enough arguements, total args: %d", argv.Length(),isolate );
}
if (argv.Length() >= 1 )
{
currentarg = 0;
if (argv[currentarg]->IsObject() )
{
if( IsDebug() ) printf("Using passed in buffer as the output\n");
outputBuffer = ( argv[currentarg]->ToObject() );
parentBuffer = true;
currentarg = 1;
if (!argv[currentarg]->IsString()) {
NODEJS_ERROR( "Second argument must be a string or buffer, type of arg is %d", argv[currentarg]->IsString(),isolate);
}
} else
if (!argv[currentarg]->IsString()) {
NODEJS_ERROR( "First argument must be a string or buffer, type of arg is %d", argv[currentarg]->IsString(),isolate);
}
}
//printf( "arg1 is : %s", *args[1] );
//Handle<Object> arg2 = args[1]->ToObject();
//Array<Object> array = args[1]->ToObject()->
//num_args = 3;
//Local<Value> argv[32];
//for( int i=0;i<num_args;i++) {
// argv[i+1] = arg2->Get(i);
// }
v8::String::Utf8Value formatString( argv[currentarg] );
formatlen = formatString.length();
format = ToCString( formatString );
/* We have a maximum of <formatlen> format codes to deal with */
//formatcodes = (char*)safe_emalloc(formatlen, sizeof(*formatcodes), 0);
//formatargs = (int*)safe_emalloc(formatlen, sizeof(*formatargs), 0);
if( IsDebug()>0 ) printf("starting.. numargs=%d, formatlen=%d\n", num_args, formatlen);
currentarg++;
firstarg = currentarg;
Local<Array> args;
if( argv[currentarg]->IsArray() == true )
{
args = v8::Local<v8::Array>::Cast(argv[currentarg]);
if(IsDebug()) printf("Args size is %d\n", args->Length() );
num_args = args->Length();
currentarg = firstarg = 0;
//for( i=0;i<num_args;i++){
// printf("value at #%d is %d\n", i, args->Get(i)->Int32Value() );
//}
argsFromArray = true;
}
#define GETARG(n) (argsFromArray ? args->Get(n) : argv[n])
/* Preprocess format into formatcodes and formatargs */
for (i = 0; i < formatlen; formatcount++) {
char code = format[i++];
int arg = 1;
if( IsDebug()>0 ) printf("starting..format args currentarg=%d \n", currentarg );
/* Handle format arguments if any */
if (i < formatlen) {
char c = format[i];
if (c == '*') {
arg = -1;
i++;
}
else if (c >= '0' && c <= '9') {
arg = atoi(&format[i]);
while (format[i] >= '0' && format[i] <= '9' && i < formatlen) {
i++;
}
}
}
if( IsDebug()>0 ) printf("starting..format codes currentargs=%d\n", currentarg );
/* Handle special arg '*' for all codes and check argv overflows */
switch ((int) code) {
/* Never uses any args */
case 'x':
case 'X':
case '@':
if (arg < 0) {
NODEJS_ERROR( "Type %c: '*' ignored", code,isolate);
arg = 1;
}
break;
/* Always uses one arg */
case 'a':
case 'A':
case 'Z':
case 'h':
case 'H':
if (currentarg >= num_args) {
NODEJS_ERROR( "Type %c: not enough arguments", code,isolate);
return Undefined(isolate);
}
if (arg < 0) {
Local<String> currstr = GETARG(currentarg)->ToString();
arg = currstr->Length();
if( code == 'Z' ) {
arg++;
}
}
currentarg++;
break;
/* Use as many args as specified */
case 'c':
case 'C':
case 's':
case 'S':
case 'i':
case 'I':
case 'l':
case 'L':
case 'n':
case 'N':
case 'v':
case 'V':
case 'f':
case 'd':
if (arg < 0) {
arg = num_args - currentarg;
}
//printf("currentarg=%d, arg=%d, code=%c\n", currentarg, arg, code );
currentarg += arg;
if (currentarg > num_args) {
NODEJS_ERROR( "Type %c: too few arguments", code,isolate);
return Undefined(isolate);
}
break;
default:
NODEJS_ERROR( "Type %c: unknown format code", code,isolate);
return Undefined(isolate);
}
formatcodes[formatcount] = code;
formatargs[formatcount] = arg;
}
if (currentarg < num_args) {
NODEJS_ERROR( "%d arguments unused", (num_args - currentarg),isolate);
}
/* Calculate output length and upper bound while processing*/
for (i = 0; i < formatcount; i++) {
int code = (int) formatcodes[i];
int arg = formatargs[i];
switch ((int) code) {
case 'h':
case 'H':
INC_OUTPUTPOS((arg + (arg % 2)) / 2,1,isolate) /* 4 bit per arg */
break;
case 'a':
case 'A':
case 'Z':
case 'c':
case 'C':
case 'x':
INC_OUTPUTPOS(arg,1,isolate) /* 8 bit per arg */
break;
case 's':
case 'S':
case 'n':
case 'v':
INC_OUTPUTPOS(arg,2,isolate) /* 16 bit per arg */
break;
case 'i':
case 'I':
INC_OUTPUTPOS(arg,sizeof(int),isolate)
break;
case 'l':
case 'L':
case 'N':
case 'V':
INC_OUTPUTPOS(arg,4,isolate) /* 32 bit per arg */
break;
case 'f':
INC_OUTPUTPOS(arg,sizeof(float),isolate)
break;
case 'd':
INC_OUTPUTPOS(arg,sizeof(double),isolate)
break;
case 'X':
outputpos -= arg;
if (outputpos < 0) {
NODEJS_ERROR( "Type %c: outside of string", code,isolate);
outputpos = 0;
}
break;
case '@':
outputpos = arg;
break;
}
if (outputsize < outputpos) {
outputsize = outputpos;
}
}
if( parentBuffer )
{
output = BufferData( outputBuffer );
printf("get currentValue value[0]=%d\n", output );
} else
if( outputsize > 255 ) {
output = (char*)malloc(outputsize + 1);
} else {
output = localOutput; // Use local storage
}
outputpos = 0;
currentarg = firstarg;
Local<Value> val;
Local<String> strval;
/* Do actual packing */
for (i = 0; i < formatcount; i++) {
int code = (int) formatcodes[i];
int arg = formatargs[i];
switch ((int) code) {
case 'a':
case 'A':
case 'Z':
{
int arg_cp = (code != 'Z') ? arg : MAX(0, arg - 1);
memset(&output[outputpos], (code == 'a' || code == 'Z') ? '\0' : ' ', arg);
//String::Utf8Value utf( argv[currentarg++]->ToString() );
String::Utf8Value utf( GETARG(currentarg)->ToString() );
currentarg++;
memcpy(&output[outputpos], *utf, (utf.length() < arg_cp) ? utf.length() : arg_cp);
outputpos += arg;
}
break;
case 'h':
case 'H': {
int nibbleshift = (code == 'h') ? 0 : 4;
int first = 1;
String::Utf8Value utf( GETARG(currentarg)->ToString() );
currentarg++;
if(arg > utf.length() ) {
NODEJS_ERROR( "Type %c: not enough characters in string", code,isolate);
arg = utf.length();
}
outputpos--;
int vi=0;
char *v = *utf;
while (arg-- > 0) {
char n = v[vi++];
if (n >= '0' && n <= '9') {
n -= '0';
} else if (n >= 'A' && n <= 'F') {
n -= ('A' - 10);
} else if (n >= 'a' && n <= 'f') {
n -= ('a' - 10);
} else {
THROW_ERROR( _buf, (_buf, "Type %c: illegal hex digit %c", code, n),isolate);
n = 0;
}
if (first--) {
output[++outputpos] = 0;
} else {
first = 1;
}
output[outputpos] |= (n << nibbleshift);
nibbleshift = (nibbleshift + 4) & 7;
}
outputpos++;
break;
}
case 'c':
case 'C':
while (arg-- > 0) {
val = GETARG(currentarg);
currentarg++;
NODEJS_pack( (int)val->Int32Value(), 1, byte_map, &output[outputpos]);
outputpos++;
}
break;
case 's':
case 'S':
case 'n':
case 'v': {
int *map = machine_endian_short_map;
if (code == 'n') {
map = big_endian_short_map;
} else if (code == 'v') {
map = little_endian_short_map;
}
while (arg-- > 0) {
val = GETARG(currentarg);
currentarg++;
NODEJS_pack(val->Int32Value(), 2, map, &output[outputpos]);
outputpos += 2;
}
break;
}
case 'i':
case 'I':
while (arg-- > 0) {
val = GETARG(currentarg);
currentarg++;
NODEJS_pack(val->Int32Value(), sizeof(int), int_map, &output[outputpos]);
outputpos += sizeof(int);
}
break;
case 'l':
case 'L':
case 'N':
case 'V': {
int *map = machine_endian_long_map;
if (code == 'N') {
map = big_endian_long_map;
} else if (code == 'V') {
map = little_endian_long_map;
}
while (arg-- > 0) {
val = GETARG(currentarg);
if( IsDebug()>0 ) printf("get currentValue value=%d\n", val->Uint32Value() );
currentarg++;
NODEJS_pack(val->Uint32Value(), 4, map, &output[outputpos]);
outputpos += 4;
}
break;
}
case 'f': {
float v;
while (arg-- > 0) {
val = GETARG(currentarg);
currentarg++;
v = ToFloat( val );
memcpy(&output[outputpos], &v, sizeof(v));
outputpos += sizeof(v);
}
break;
}
case 'd': {
double v;
while (arg-- > 0) {
val = GETARG(currentarg);
currentarg++;
v = ToDouble( val );
memcpy(&output[outputpos], &v, sizeof(v));
outputpos += sizeof(v);
}
break;
}
case 'x':
memset(&output[outputpos], '\0', arg);
outputpos += arg;
break;
case 'X':
outputpos -= arg;
if (outputpos < 0) {
outputpos = 0;
}
break;
case '@':
if (arg > outputpos) {
memset(&output[outputpos], '\0', arg - outputpos);
}
outputpos = arg;
break;
}
}
output[outputpos] = '\0';
//return Undefined();
if( parentBuffer ) {
return outputBuffer ;
}
v8::Local<v8::Object> return_buffer = node::Buffer::New( isolate,output, outputpos).ToLocalChecked();
if( outputsize > 255 ) {
free(output);
}
if( IsDebug()>0 ) {
printf("get currentValue value[0]=%d\n", BufferData(return_buffer,isolate)[0] );
printf("get currentValue value[1]=%d\n", BufferData(return_buffer,isolate)[1] );
printf("get currentValue value[2]=%d\n", BufferData(return_buffer,isolate)[2] );
printf("get currentValue value[3]=%d\n", BufferData(return_buffer,isolate)[3] );
}
return return_buffer ;
}
/* }}} */
/* {{{ NODEJS_unpack
*/
static long NODEJS_unpack(char *data, int size, int issigned, int *map)
{
long result;
char *cresult = (char *) &result;
int i;
result = issigned ? -1 : 0;
for (i = 0; i < size; i++) {
cresult[map[i]] = *data++;
}
return result;
}
/* }}} */
/* unpack() is based on Perl's unpack(), but is modified a bit from there.
* Rather than depending on error-prone ordered lists or syntactically
* unpleasant pass-by-reference, we return an object with named paramters
* (like *_fetch_object()). Syntax is "f[repeat]name/...", where "f" is the
* formatter char (like pack()), "[repeat]" is the optional repeater argument,
* and "name" is the name of the variable to use.
* Example: "c2chars/nints" will return an object with fields
* chars1, chars2, and ints.
* Numeric pack types will return numbers, a and A will return strings,
* f and d will return doubles.
* Implemented formats are Z, A, a, h, H, c, C, s, S, i, I, l, L, n, N, f, d, x, X, @.
*/
/* {{{ proto array unpack(String format, Buffer input)
Unpack binary string into named array elements according to format argument */
static v8::Local<v8::Value> _unpack(const v8::FunctionCallbackInfo<v8::Value>& argv)
{
v8::Isolate* isolate = argv.GetIsolate();
v8::EscapableHandleScope scope(isolate);
const char *format;
char *input = NULL;
int formatlen, formatidx=0;
int inputpos, inputlen=0, i;
bool usePerlFormat = false;
if (argv.Length() == 0 || !argv[0]->IsString()) {
return isolate->ThrowException(Exception::TypeError(
v8::String::NewFromUtf8(isolate,"First argument must be a string")));
}
String::Utf8Value formatString( argv[0]->ToString() );
format = *(formatString);
formatlen = formatString.length();
if (Buffer::HasInstance(argv[1])) {
// buffer
v8::Local<v8::Object> buffer = argv[1]->ToObject();
inputlen = BufferLength(buffer);
input = BufferData(buffer);
}
inputpos = 0;
if (argv.Length() >= 3 && argv[2].IsEmpty() == false ) {
usePerlFormat = true;
}
Local<Object> return_value = Object::New(isolate);
while (formatlen-- > 0) {
char type = format[ formatidx++ ];
char c;
int arg = 1, argb;
int namelen = 0;
int size=0;
Local<String> name;
/* Handle format arguments if any */
if (formatlen > 0) {
c = format[formatidx];
if (c >= '0' && c <= '9') {
arg = c - '0';
while (formatlen > 0 && format[formatidx] >= '0' && format[formatidx] <= '9') {
arg = (arg*10) + (format[formatidx] - '0');
formatidx++;
formatlen--;
}
} else if (c == '*') {
arg = -1;
formatidx++;
formatlen--;
}
}
argb = arg;
/* Get of new value in array */
if( usePerlFormat == false ) {
namelen = 0;
while (formatlen > 0 && format[formatidx] != '/') {
formatlen--;
formatidx++;
namelen++;
}
if (namelen > 200)
namelen = 200;
name = v8::String::NewFromUtf8(isolate, format+formatidx-namelen,v8::NewStringType::kNormal, namelen ).ToLocalChecked();
} else {
char temp[8]; sprintf( temp, "%d", arg );
namelen = strlen(temp);
name = v8::String::NewFromUtf8(isolate, temp,v8::NewStringType::kNormal, namelen ).ToLocalChecked();
}
switch ((int) type) {
/* Never use any input */
case 'X':
size = -1;
break;
case '@':
size = 0;
break;
case 'a':
case 'A':
case 'Z':
size = arg;
arg = 1;
break;
case 'h':
case 'H':
size = (arg > 0) ? (arg + (arg % 2)) / 2 : arg;
arg = 1;
break;
/* Use 1 byte of input */
case 'c':
case 'C':
case 'x':
size = 1;
break;
/* Use 2 bytes of input */
case 's':
case 'S':
case 'n':
case 'v':
size = 2;
break;
/* Use sizeof(int) bytes of input */
case 'i':
case 'I':
size = sizeof(int);
break;
/* Use 4 bytes of input */
case 'l':
case 'L':
case 'N':
case 'V':
size = 4;
break;
/* Use sizeof(float) bytes of input */
case 'f':
size = sizeof(float);
break;
/* Use sizeof(double) bytes of input */
case 'd':
size = sizeof(double);
break;
default:
NODEJS_ERROR( "Invalid format type %c", type,isolate);
return Undefined(isolate);
break;
}
/* Do actual unpacking */
for (i = 0; i != arg; i++ ) {
/* Space for name + number, safe as namelen is ensured <= 200 */
char n[256];
if (arg != 1 || namelen == 0) {
/* Need to add element number to name */
snprintf(n, sizeof(n), "%.*s%d", namelen, *String::Utf8Value(name), i + 1);
} else {
/* Truncate name to next format code or end of string */
snprintf(n, sizeof(n), "%.*s", namelen, *String::Utf8Value(name));
}
if (size != 0 && size != -1 && INT_MAX - size + 1 < inputpos) {
NODEJS_ERROR( "Type %c: integer overflow", type,isolate);
inputpos = 0;
}
if ((inputpos + size) <= inputlen && input != NULL) {
switch ((int) type) {
case 'a':
case 'A': {
char pad = (type == 'a') ? '\0' : ' ';
int len = inputlen - inputpos; /* Remaining string */
/* If size was given take minimum of len and size */
if ((size >= 0) && (len > size)) {
len = size;
}
size = len;
/* Remove padding chars from unpacked data */
while (--len >= 0) {
if (input[inputpos + len] != pad)
break;
}
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::String::NewFromUtf8(isolate, &input[inputpos],v8::NewStringType::kNormal, len + 1 ).ToLocalChecked() );
break;
}
case 'Z': {
/* Z will strip everything after the first null character */
char pad = '\0';
int s,
len = inputlen - inputpos; /* Remaining string */
/* If size was given take minimum of len and size */
if ((size >= 0) && (len > size)) {
len = size;
}
size = len;
/* Remove everything after the first null */
for (s=0 ; s < len ; s++) {
if (input[inputpos + s] == pad)
break;
}
len = s;
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::String::NewFromUtf8(isolate, &input[inputpos],v8::NewStringType::kNormal, len ).ToLocalChecked() );
break;
}
case 'h':
case 'H': {
int len = (inputlen - inputpos) * 2; /* Remaining */
int nibbleshift = (type == 'h') ? 0 : 4;
int first = 1;
char *buf;
int ipos, opos;
/* If size was given take minimum of len and size */
if (size >= 0 && len > (size * 2)) {
len = size * 2;
}
if (argb > 0) {
len -= argb % 2;
}
buf = (char*)malloc(len + 1);
for (ipos = opos = 0; opos < len; opos++) {
char cc = (input[inputpos + ipos] >> nibbleshift) & 0xf;
if (cc < 10) {
cc += '0';
} else {
cc += 'a' - 10;
}
buf[opos] = cc;
nibbleshift = (nibbleshift + 4) & 7;
if (first-- == 0) {
ipos++;
first = 1;
}
}
buf[len] = '\0';
//add_assoc_stringl(return_value, n, buf, len, 1);
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::String::NewFromUtf8(isolate,buf,v8::NewStringType::kNormal, len ).ToLocalChecked() );
free(buf);
break;
}
case 'c':
case 'C': {
int issigned = (type == 'c') ? (input[inputpos] & 0x80) : 0;
long v = NODEJS_unpack(&input[inputpos], 1, issigned, byte_map);
//add_assoc_long(return_value, n, v);
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::Integer::New(isolate,v) );
break;
}
case 's':
case 'S':
case 'n':
case 'v': {
long v;
int issigned = 0;
int *map = machine_endian_short_map;
if (type == 's') {
issigned = input[inputpos + (machine_little_endian ? 1 : 0)] & 0x80;
} else if (type == 'n') {
map = big_endian_short_map;
} else if (type == 'v') {
map = little_endian_short_map;
}
v = NODEJS_unpack(&input[inputpos], 2, issigned, map);
//add_assoc_long(return_value, n, v);
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::Integer::New(isolate,v) );
break;
}
case 'i':
case 'I': {
long v = 0;
int issigned = 0;
if (type == 'i') {
issigned = input[inputpos + (machine_little_endian ? (sizeof(int) - 1) : 0)] & 0x80;
} else if (sizeof(long) > 4 && (input[inputpos + machine_endian_long_map[3]] & 0x80) == 0x80) {
v = ~INT_MAX;
}
v |= NODEJS_unpack(&input[inputpos], sizeof(int), issigned, int_map);
//add_assoc_long(return_value, n, v);
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::Integer::New(isolate,v) );
break;
}
case 'l':
case 'L':
case 'N':
case 'V': {
int issigned = 0;
int *map = machine_endian_long_map;
long v = 0;
if (type == 'l' || type == 'L') {
issigned = input[inputpos + (machine_little_endian ? 3 : 0)] & 0x80;
} else if (type == 'N') {
issigned = input[inputpos] & 0x80;
map = big_endian_long_map;
} else if (type == 'V') {
issigned = input[inputpos + 3] & 0x80;
map = little_endian_long_map;
}
if (sizeof(long) > 4 && issigned) {
v = ~INT_MAX;
}
v |= NODEJS_unpack(&input[inputpos], 4, issigned, map);
if (sizeof(long) > 4) {
if (type == 'l') {
v = (signed int) v;
} else {
v = (unsigned int) v;
}
}
//add_assoc_long(return_value, n, v);
return_value->Set(v8::String::NewFromUtf8(isolate,n), v8::Integer::New(isolate,v) );
break;
}
case 'f': {
float v;
memcpy(&v, &input[inputpos], sizeof(float));
//add_assoc_double(return_value, n, (double)v);
return_value->Set( v8::String::NewFromUtf8(isolate,n), v8::Integer::New(isolate,v) );