Core JS

An implementation of some useful parts from the C standard library, and a few useful parts inspired by the C standard library, and some parts that are implemented because some parts of Javascript are brain dead, like integer support.

More to be added, soon(tm)!

Allocating Buffers

CSAlloc

CSAlloc(n)

Returns a buffer of length n, just like malloc, but it sets every byte of the allocated buffer to 0 as when using calloc.

CSRealloc

CSRealloc(source, n)

Like realloc, but it does not free source, the only way to free something in core.js is via garbage collection.

CSByteBuffer

CSByteBuffer(bytes...)

Allocates a buffer containing bytes.

CSRead

CSRead(src, offset, n)

Creates a new buffer, with the same values as src from offset and n bytes on.

CSRead(Native|Little|Big)(16|32|64)

CSReadBig16(src, offset)

Reads a 2, 4 or 8 byte unit from a buffer into a newly allocated buffer, this seems like it is a pretty useless endeavour, but Javascript doesn't support integers very well, especially not unsigned ones.

CSLoad(U?)Int8

CSLoadInt8(src, offset)

Loads a single byte integer from a buffer into a Javascript number.

CSLoad(Native|Little|Big)(U?)Int(16|32)

CSLoadBigInt16(src, offset)

Loads a 2 or 4 byte integer from a buffer into a Javascript number, 8 byte integers are not supported since they would lose precision.

CSLoad(Native|Little|Big)Float(32|64)

Loads a 4 or 8 byte float from a buffer into a Javascript number.

CSStringToBuffer

CSStringToBuffer(string)

Creates a new buffer, with the same values as the ASCII values of each character in string. You probably should only call this on constant strings, users will probably not be aware of the ASCII limitations.

CSBufferToString

CSBufferToString(src, offset, n)

Creates a string from an ASCII buffer.

Comparison

CSCompare

CSCompare(a, aOffset, b, bOffset, n)

Like memcmp, but returns true if equal

CSCompareToString

CSCompareToString(a, aOffset, b, bOffset, n)

The same as CSCompare, but b is a string instead of a buffer. See the limitations of CSStringToBuffer.

Copy

CSCopy

CSCopy(dst, offset, src, offset, n)

Very similar to memcpy, but since we do not have pointers, the interface is a little different.

CSCopyFromString

CSCopyFromString(dst, dstOffset, src, srcOffset, n)

The same as CSCopy, but the source is a string instead of a buffer. See the limitations of CSStringToBuffer.

Endian Conversion

CSBigEndian

CSBigEndian

A property containing true if the system is big endian, but most likely it will contain false, since few systems these days are big endian. This fact makes me sad, since big endian makes much more sense.

CSSwap16/32/64

CSSwap16(dst, offset, src, offset, n)

Copies from src to dst, but swaps the order of each 2, 4 or 8-byte unit. n must be a multiple of 2, 4 or 8 respectively.

CS(Big|Little)ToNative(16|32|64)

CSBigToNative16(dst, offset, src, offset, n)

Copies from src to dst, but changes the order of each 2, 4 or 8-byte unit from big/little endian to native endian. n must be a multiple of 2, 4 or 8 respectively.

It is safe for src and dst to be the same buffer.

CSNativeTo(Big|Little)(16|32|64)

CSNativeToBig16(dst, offset, src, offset, n)

Copies from src to dst, but changes the order of each 2, 4 or 8-byte unit from native endian to big/little endian. n must be a multiple of 2, 4 or 8 respectively.

It is safe for src and dst to be the same buffer.

Bitwise

CSBitwiseNOT

CSBitwiseNOT(dst, offset, a, offset, n)

Applies a bitwise operator to a, assigning the result to dst. Only operates on the n first bytes.

CSBitwise(AND|NAND|NOR|OR|XOR)

CSBitwiseAND(dst, offset, a, offset, b, offset, n)

Applies a bitwise operator to a and b, assigning the result to dst. Only operates on the n first bytes.

License (MIT)

Copyright (C) 2011 by Jens Nockert

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.