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Incorporate endianness into buffer.read* function names instead of passing in a boolean flag

v0.7.4-release
Brian White 14 years ago
committed by Ben Noordhuis
parent
a002f4f453
commit
b7c23ac3f5
11 changed files with 595 additions and 499 deletions
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  1. 256
      doc/api/buffers.markdown
  2. 466
      lib/buffer.js
  3. 14
      lib/buffer_ieee754.js
  4. 61
      test/simple/test-readdouble.js
  5. 37
      test/simple/test-readfloat.js
  6. 68
      test/simple/test-readint.js
  7. 51
      test/simple/test-readuint.js
  8. 21
      test/simple/test-writedouble.js
  9. 21
      test/simple/test-writefloat.js
  10. 44
      test/simple/test-writeint.js
  11. 55
      test/simple/test-writeuint.js

256
doc/api/buffers.markdown
View File

@ -155,8 +155,8 @@ indexes.
**Modifying the new buffer slice will modify memory in the original buffer!**
Example: build a Buffer with the ASCII alphabet, take a slice, then modify one byte
from the original Buffer.
Example: build a Buffer with the ASCII alphabet, take a slice, then modify one
byte from the original Buffer.
var buf1 = new Buffer(26);
@ -172,11 +172,12 @@ from the original Buffer.
// abc
// !bc
### buffer.readUInt8(offset, bigEndian)
### buffer.readUInt8(offset, noAssert=false)
Reads an unsigned 8 bit integer from the buffer at the specified offset. If
`bigEndian` is true, reads bytes in a big endian format, otherwise reads them as
little endian.
Reads an unsigned 8 bit integer from the buffer at the specified offset.
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Example:
@ -188,24 +189,22 @@ Example:
buf[3] = 0x42;
for (ii = 0; ii < buf.length; ii++) {
console.log(buf.readUInt8(ii, true));
console.log(buf.readUInt8(ii, false));
console.log(buf.readUInt8(ii);
}
// 0x3
// 0x3
// 0x4
// 0x4
// 0x23
// 0x23
// 0x42
// 0x42
### buffer.readUInt16(offset, bigEndian)
### buffer.readUInt16LE(offset, noAssert=false)
### buffer.readUInt16BE(offset, noAssert=false)
Reads an unsigned 16 bit integer from the buffer at the specified offset with
specified endian format.
Reads an unsigned 16 bit integer from the buffer at the specified offset. If
`bigEndian` is true, reads bytes in a big endian format, otherwise reads them as
little endian.
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Example:
@ -216,12 +215,12 @@ Example:
buf[2] = 0x23;
buf[3] = 0x42;
console.log(buf.readUInt16(0, true));
console.log(buf.readUInt16(0, false));
console.log(buf.readUInt16(1, true));
console.log(buf.readUInt16(1, false));
console.log(buf.readUInt16(2, true));
console.log(buf.readUInt16(2, false));
console.log(buf.readUInt16BE(0));
console.log(buf.readUInt16LE(0));
console.log(buf.readUInt16BE(1));
console.log(buf.readUInt16LE(1));
console.log(buf.readUInt16BE(2));
console.log(buf.readUInt16LE(2));
// 0x0304
// 0x0403
@ -230,12 +229,14 @@ Example:
// 0x2342
// 0x4223
### buffer.readUInt32(offset, bigEndian)
### buffer.readUInt32LE(offset, noAssert=false)
### buffer.readUInt32BE(offset, noAssert=false)
Reads an unsigned 32 bit integer from the buffer at the specified offset. If
`bigEndian` is true, reads bytes in a big endian format, otherwise reads them as
little endian.
Reads an unsigned 32 bit integer from the buffer at the specified offset with
specified endian format.
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Example:
@ -246,43 +247,54 @@ Example:
buf[2] = 0x23;
buf[3] = 0x42;
console.log(buf.readUInt32(0, true));
console.log(buf.readUInt32(0, false));
console.log(buf.readUInt32BE(0));
console.log(buf.readUInt32LE(0));
// 0x03042342
// 0x42230403
### buffer.readInt8(offset, bigEndian)
### buffer.readInt8(offset, noAssert=false)
Reads a signed 8 bit integer from the buffer at the specified offset. If
`bigEndian` is true, reads bytes in a big endian format, otherwise reads them as
little endian.
Reads a signed 8 bit integer from the buffer at the specified offset.
Works as `buffer.readUInt8`, except buffer contents are treated as twos
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Works as `buffer.readUInt8`, except buffer contents are treated as two's
complement signed values.
### buffer.readInt16(offset, bigEndian)
### buffer.readInt16LE(offset, noAssert=false)
### buffer.readInt16BE(offset, noAssert=false)
Reads a signed 16 bit integer from the buffer at the specified offset with
specified endian format.
Reads a signed 16 bit integer from the buffer at the specified offset. If
`bigEndian` is true, reads bytes in a big endian format, otherwise reads them as
little endian.
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Works as `buffer.readUInt16`, except buffer contents are treated as twos
Works as `buffer.readUInt16*`, except buffer contents are treated as two's
complement signed values.
### buffer.readInt32(offset, bigEndian)
### buffer.readInt32LE(offset, noAssert=false)
### buffer.readInt32BE(offset, noAssert=false)
Reads a signed 32 bit integer from the buffer at the specified offset. If
`bigEndian` is true, reads bytes in a big endian format, otherwise reads them as
little endian.
Reads a signed 32 bit integer from the buffer at the specified offset with
specified endian format.
Works as `buffer.readUInt32`, except buffer contents are treated as twos
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Works as `buffer.readUInt32*`, except buffer contents are treated as two's
complement signed values.
### buffer.readFloat(offset, bigEndian)
### buffer.readFloatLE(offset, noAssert=false)
### buffer.readFloatBE(offset, noAssert=false)
Reads a 32 bit float from the buffer at the specified offset.
Reads a 32 bit float from the buffer at the specified offset with specified
endian format.
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Example:
@ -293,15 +305,18 @@ Example:
buf[2] = 0x80;
buf[3] = 0x3f;
console.log(buf.readFloat(0, false));
console.log(buf.readFloatLE(0));
// 0x01
### buffer.readDouble(offset, bigEndian)
### buffer.readDoubleLE(offset, noAssert=false)
### buffer.readDoubleBE(offset, noAssert=false)
Reads a 64 bit double from the buffer at the specified offset with specified
endian format.
Reads a 64 bit double from the buffer at the specified offset. Endian must be
either true or false and specifies what endian ordering to read the bytes
from the buffer in.
Set `noAssert` to true to skip validation of `offset`. This means that `offset`
may be beyond the end of the buffer.
Example:
@ -316,152 +331,175 @@ Example:
buf[6] = 0xd5;
buf[7] = 0x3f;
console.log(buf.readDouble(0, false));
console.log(buf.readDoubleLE(0));
// 0.3333333333333333
### buffer.writeUInt8(value, offset, bigEndian)
### buffer.writeUInt8(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 8 bit unsigned integer.
Writes `value` to the buffer at the specified offset. Note, `value` must be a
valid unsigned 8 bit integer.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Example:
var buf = new Buffer(4);
buf.writeUInt8(0x3, 0, true);
buf.writeUInt8(0x4, 1, true);
buf.writeUInt8(0x23, 2, true);
buf.writeUInt8(0x42, 3, true);
console.log(buf);
buf.writeUInt8(0x3, 0, false);
buf.writeUInt8(0x4, 1, false);
buf.writeUInt8(0x23, 2, false);
buf.writeUInt8(0x42, 3, false);
buf.writeUInt8(0x3, 0);
buf.writeUInt8(0x4, 1);
buf.writeUInt8(0x23, 2);
buf.writeUInt8(0x42, 3);
console.log(buf);
// <Buffer 03 04 23 42>
// <Buffer 03 04 23 42>
### buffer.writeUInt16(value, offset, bigEndian)
### buffer.writeUInt16LE(value, offset, noAssert=false)
### buffer.writeUInt16BE(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 16 bit unsigned integer.
format. Note, `value` must be a valid unsigned 16 bit integer.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Example:
var buf = new Buffer(4);
buf.writeUInt16(0xdead, 0, true);
buf.writeUInt16(0xbeef, 2, true);
buf.writeUInt16BE(0xdead, 0);
buf.writeUInt16BE(0xbeef, 2);
console.log(buf);
buf.writeUInt16(0xdead, 0, false);
buf.writeUInt16(0xbeef, 2, false);
buf.writeUInt16LE(0xdead, 0);
buf.writeUInt16LE(0xbeef, 2);
console.log(buf);
// <Buffer de ad be ef>
// <Buffer ad de ef be>
### buffer.writeUInt32(value, offset, bigEndian)
### buffer.writeUInt32LE(value, offset, noAssert=false)
### buffer.writeUInt32BE(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 32 bit unsigned integer.
format. Note, `value` must be a valid unsigned 32 bit integer.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Example:
var buf = new Buffer(4);
buf.writeUInt32(0xfeedface, 0, true);
buf.writeUInt32BE(0xfeedface, 0);
console.log(buf);
buf.writeUInt32(0xfeedface, 0, false);
buf.writeUInt32LE(0xfeedface, 0);
console.log(buf);
// <Buffer fe ed fa ce>
// <Buffer ce fa ed fe>
### buffer.writeInt8(value, offset, bigEndian)
### buffer.writeInt8(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 16 bit signed integer.
Writes `value` to the buffer at the specified offset. Note, `value` must be a
valid signed 8 bit integer.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Works as `buffer.writeUInt8`, except value is written out as a two's complement
signed integer into `buffer`.
### buffer.writeInt16(value, offset, bigEndian)
### buffer.writeInt16LE(value, offset, noAssert=false)
### buffer.writeInt16BE(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 16 bit unsigned integer.
format. Note, `value` must be a valid signed 16 bit integer.
Works as `buffer.writeUInt16`, except value is written out as a two's complement
signed integer into `buffer`.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Works as `buffer.writeUInt16*`, except value is written out as a two's
complement signed integer into `buffer`.
### buffer.writeInt32(value, offset, bigEndian)
### buffer.writeInt32LE(value, offset, noAssert=false)
### buffer.writeInt32BE(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 32 bit signed integer.
format. Note, `value` must be a valid signed 32 bit integer.
Works as `buffer.writeUInt32`, except value is written out as a two's complement
signed integer into `buffer`.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Works as `buffer.writeUInt32*`, except value is written out as a two's
complement signed integer into `buffer`.
### buffer.writeFloat(value, offset, bigEndian)
### buffer.writeFloatLE(value, offset, noAssert=false)
### buffer.writeFloatBE(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 32 bit float.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Example:
var buf = new Buffer(4);
buf.writeFloat(0xcafebabe, 0, true);
buf.writeFloatBE(0xcafebabe, 0);
console.log(buf);
buf.writeFloat(0xcafebabe, 0, false);
buf.writeFloatLE(0xcafebabe, 0);
console.log(buf);
// <Buffer 4f 4a fe bb>
// <Buffer bb fe 4a 4f>
### buffer.writeDouble(value, offset, bigEndian)
### buffer.writeDoubleLE(value, offset, noAssert=false)
### buffer.writeDoubleBE(value, offset, noAssert=false)
Writes `value` to the buffer at the specified offset with specified endian
format. Note, `value` must be a valid 64 bit double.
Set `noAssert` to true to skip validation of `value` and `offset`. This means
that `value` may be too large for the specific function and `offset` may be
beyond the end of the buffer leading to the values being silently dropped. This
should not be used unless you are certain of correctness.
Example:
var buf = new Buffer(8);
buf.writeFloat(0xdeadbeefcafebabe, 0, true);
buf.writeDoubleBE(0xdeadbeefcafebabe, 0);
console.log(buf);
buf.writeFloat(0xdeadbeefcafebabe, 0, false);
buf.writeDoubleLE(0xdeadbeefcafebabe, 0);
console.log(buf);
// <Buffer 43 eb d5 b7 dd f9 5f d7>
// <Buffer d7 5f f9 dd b7 d5 eb 43>
### buffer.readUInt8NoChk(value, offset, bigEndian)
### buffer.readUInt16NoChk(value, offset, bigEndian)
### buffer.readUInt32NoChk(value, offset, bigEndian)
### buffer.writeUInt8NoChk(value, offset, bigEndian)
### buffer.writeUInt16NoChk(value, offset, bigEndian)
### buffer.writeUInt32NoChk(value, offset, bigEndian)
These functions all work as per the versions without the NoChk suffix. These
functions allow you to do use the raw functionality without any kind of
validation for correctness. This means that value may be too large for the
specific function and offset may be beyond the end of the buffer leading to the
values being silently dropped. These should not be used unless you are certain
of correctness.
### buffer.fill(value, offset=0, length=-1)
Fills the buffer with the specified value. If the offset and length are not
@ -472,5 +510,5 @@ given it will fill the entire buffer.
### INSPECT_MAX_BYTES
How many bytes will be returned when `b.inspect()` is called. This can
How many bytes will be returned when `buffer.inspect()` is called. This can
be overriden by user modules.

466
lib/buffer.js
View File

@ -536,28 +536,36 @@ Buffer.prototype.asciiWrite = function(string, offset) {
return this.write(string, offset, 'ascii');
};
Buffer.prototype.readUInt8NoChk = function(offset, bigEndian) {
Buffer.prototype.readUInt8 = function(offset, noAssert) {
var buffer = this;
if (!noAssert) {
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset < buffer.length,
'Trying to read beyond buffer length');
}
return buffer[offset];
};
Buffer.prototype.readUInt8 = function(offset, bigEndian) {
var buffer = this;
function readUInt16(buffer, offset, isBigEndian, noAssert) {
var val = 0;
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset < buffer.length,
'Trying to read beyond buffer length');
if (!noAssert) {
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
return buffer.readUInt8NoChk(offset, bigEndian);
};
assert.ok(offset !== undefined && offset !== null,
'missing offset');
Buffer.prototype.readUInt16NoChk = function(offset, bigEndian) {
var val = 0;
var buffer = this;
assert.ok(offset + 1 < buffer.length,
'Trying to read beyond buffer length');
}
if (bigEndian) {
if (isBigEndian) {
val = buffer[offset] << 8;
val |= buffer[offset + 1];
} else {
@ -566,28 +574,31 @@ Buffer.prototype.readUInt16NoChk = function(offset, bigEndian) {
}
return val;
};
}
Buffer.prototype.readUInt16 = function(offset, bigEndian) {
var buffer = this;
Buffer.prototype.readUInt16LE = function(offset, noAssert) {
return readUInt16(this, offset, false, noAssert);
};
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
Buffer.prototype.readUInt16BE = function(offset, noAssert) {
return readUInt16(this, offset, true, noAssert);
};
assert.ok(offset !== undefined && offset !== null,
'missing offset');
function readUInt32(buffer, offset, isBigEndian, noAssert) {
var val = 0;
assert.ok(offset + 1 < buffer.length,
'Trying to read beyond buffer length');
if (!noAssert) {
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
return buffer.readUInt16NoChk(offset, bigEndian);
};
assert.ok(offset !== undefined && offset !== null,
'missing offset');
Buffer.prototype.readUInt32NoChk = function(offset, bigEndian) {
var val = 0;
var buffer = this;
assert.ok(offset + 3 < buffer.length,
'Trying to read beyond buffer length');
}
if (bigEndian) {
if (isBigEndian) {
val = buffer[offset + 1] << 16;
val |= buffer[offset + 2] << 8;
val |= buffer[offset + 3];
@ -600,22 +611,14 @@ Buffer.prototype.readUInt32NoChk = function(offset, bigEndian) {
}
return val;
};
Buffer.prototype.readUInt32 = function(offset, bigEndian) {
var val = 0;
var buffer = this;
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
}
assert.ok(offset + 3 < buffer.length,
'Trying to read beyond buffer length');
Buffer.prototype.readUInt32LE = function(offset, noAssert) {
return readUInt32(this, offset, false, noAssert);
};
return buffer.readUInt32NoChk(offset, bigEndian);
Buffer.prototype.readUInt32BE = function(offset, noAssert) {
return readUInt32(this, offset, true, noAssert);
};
@ -664,15 +667,17 @@ Buffer.prototype.readUInt32 = function(offset, bigEndian) {
* (0x007f + 1) * -1
* (0x0080) * -1
*/
Buffer.prototype.readInt8 = function(offset, bigEndian) {
Buffer.prototype.readInt8 = function(offset, noAssert) {
var buffer = this;
var neg;
assert.ok(offset !== undefined && offset !== null,
'missing offset');
if (!noAssert) {
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset < buffer.length,
'Trying to read beyond buffer length');
assert.ok(offset < buffer.length,
'Trying to read beyond buffer length');
}
neg = buffer[offset] & 0x80;
if (!neg) {
@ -682,77 +687,108 @@ Buffer.prototype.readInt8 = function(offset, bigEndian) {
return ((0xff - buffer[offset] + 1) * -1);
};
Buffer.prototype.readInt16 = function(offset, bigEndian) {
var buffer = this;
function readInt16(buffer, offset, isBigEndian, noAssert) {
var neg;
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
if (!noAssert) {
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 1 < buffer.length,
'Trying to read beyond buffer length');
assert.ok(offset + 1 < buffer.length,
'Trying to read beyond buffer length');
}
val = buffer.readUInt16NoChk(offset, bigEndian);
val = readUInt16(buffer, offset, isBigEndian, noAssert);
neg = val & 0x8000;
if (!neg) {
return val;
}
return (0xffff - val + 1) * -1;
}
Buffer.prototype.readInt16LE = function(offset, noAssert) {
return readInt16(this, offset, false, noAssert);
};
Buffer.prototype.readInt16BE = function(offset, noAssert) {
return readInt16(this, offset, true, noAssert);
};
Buffer.prototype.readInt32 = function(offset, bigEndian) {
var buffer = this;
function readInt32(buffer, offset, isBigEndian, noAssert) {
var neg;
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
if (!noAssert) {
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 3 < buffer.length,
'Trying to read beyond buffer length');
assert.ok(offset + 3 < buffer.length,
'Trying to read beyond buffer length');
}
val = buffer.readUInt32NoChk(offset, bigEndian);
val = readUInt32(buffer, offset, isBigEndian, noAssert);
neg = val & 0x80000000;
if (!neg) {
return (val);
}
return (0xffffffff - val + 1) * -1;
};
}
Buffer.prototype.readInt32LE = function(offset, noAssert) {
return readInt32(this, offset, false, noAssert);
};
Buffer.prototype.readFloat = function(offset, bigEndian) {
var buffer = this;
Buffer.prototype.readInt32BE = function(offset, noAssert) {
return readInt32(this, offset, true, noAssert);
};
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
function readFloat(buffer, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset + 3 < buffer.length,
'Trying to read beyond buffer length');
assert.ok(offset + 3 < buffer.length,
'Trying to read beyond buffer length');
}
return require('buffer_ieee754').readIEEE754(buffer, offset, bigEndian,
return require('buffer_ieee754').readIEEE754(buffer, offset, isBigEndian,
23, 4);
}
Buffer.prototype.readFloatLE = function(offset, noAssert) {
return readFloat(this, offset, false, noAssert);
};
Buffer.prototype.readDouble = function(offset, bigEndian) {
var buffer = this;
Buffer.prototype.readFloatBE = function(offset, noAssert) {
return readFloat(this, offset, true, noAssert);
};
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
function readDouble(buffer, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset + 7 < buffer.length,
'Trying to read beyond buffer length');
assert.ok(offset + 7 < buffer.length,
'Trying to read beyond buffer length');
}
return require('buffer_ieee754').readIEEE754(buffer, offset, bigEndian,
return require('buffer_ieee754').readIEEE754(buffer, offset, isBigEndian,
52, 8);
}
Buffer.prototype.readDoubleLE = function(offset, noAssert) {
return readDouble(this, offset, false, noAssert);
};
Buffer.prototype.readDoubleBE = function(offset, noAssert) {
return readDouble(this, offset, true, noAssert);
};
@ -777,68 +813,77 @@ function verifuint(value, max) {
assert.ok(Math.floor(value) === value, 'value has a fractional component');
}
Buffer.prototype.writeUInt8NoChk = function(value, offset, bigEndian) {
Buffer.prototype.writeUInt8 = function(value, offset, noAssert) {
var buffer = this;
buffer[offset] = value;
};
Buffer.prototype.writeUInt8 = function(value, offset, bigEndian) {
var buffer = this;
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset < buffer.length,
'trying to write beyond buffer length');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
verifuint(value, 0xff);
}
assert.ok(offset < buffer.length,
'trying to write beyond buffer length');
buffer[offset] = value;
};
verifuint(value, 0xff);
function writeUInt16(buffer, value, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
buffer.writeUInt8NoChk(value, offset, bigEndian);
};
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
Buffer.prototype.writeUInt16NoChk = function(value, offset, bigEndian) {
var buffer = this;
assert.ok(offset !== undefined && offset !== null,
'missing offset');
if (bigEndian) {
assert.ok(offset + 1 < buffer.length,
'trying to write beyond buffer length');
verifuint(value, 0xffff);
}
if (isBigEndian) {
buffer[offset] = (value & 0xff00) >>> 8;
buffer[offset + 1] = value & 0x00ff;
} else {
buffer[offset + 1] = (value & 0xff00) >>> 8;
buffer[offset] = value & 0x00ff;
}
}
Buffer.prototype.writeUInt16LE = function(value, offset, noAssert) {
writeUInt16(this, value, offset, false, noAssert);
};
Buffer.prototype.writeUInt16 = function(value, offset, bigEndian) {
var buffer = this;
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
Buffer.prototype.writeUInt16BE = function(value, offset, noAssert) {
writeUInt16(this, value, offset, true, noAssert);
};
assert.ok(offset !== undefined && offset !== null,
'missing offset');
function writeUInt32(buffer, value, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(offset + 1 < buffer.length,
'trying to write beyond buffer length');
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
verifuint(value, 0xffff);
assert.ok(offset !== undefined && offset !== null,
'missing offset');
buffer.writeUInt16NoChk(value, offset, bigEndian);
};
assert.ok(offset + 3 < buffer.length,
'trying to write beyond buffer length');
Buffer.prototype.writeUInt32NoChk = function(value, offset, bigEndian) {
var buffer = this;
verifuint(value, 0xffffffff);
}
if (bigEndian) {
if (isBigEndian) {
buffer[offset] = (value >>> 24) & 0xff;
buffer[offset + 1] = (value >>> 16) & 0xff;
buffer[offset + 2] = (value >>> 8) & 0xff;
@ -849,26 +894,14 @@ Buffer.prototype.writeUInt32NoChk = function(value, offset, bigEndian) {
buffer[offset + 1] = (value >>> 8) & 0xff;
buffer[offset] = value & 0xff;
}
};
Buffer.prototype.writeUInt32 = function(value, offset, bigEndian) {
var buffer = this;
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 3 < buffer.length,
'trying to write beyond buffer length');
}
verifuint(value, 0xffffffff);
Buffer.prototype.writeUInt32LE = function(value, offset, noAssert) {
writeUInt32(this, value, offset, false, noAssert);
};
buffer.writeUInt32NoChk(value, offset, bigEndian);
Buffer.prototype.writeUInt32BE = function(value, offset, noAssert) {
writeUInt32(this, value, offset, true, noAssert);
};
@ -923,7 +956,6 @@ function verifsint(value, max, min) {
assert.ok(Math.floor(value) === value, 'value has a fractional component');
}
function verifIEEE754(value, max, min) {
assert.ok(typeof (value) == 'number',
'cannot write a non-number as a number');
@ -933,119 +965,147 @@ function verifIEEE754(value, max, min) {
assert.ok(value >= min, 'value smaller than minimum allowed value');
}
Buffer.prototype.writeInt8 = function(value, offset, bigEndian) {
Buffer.prototype.writeInt8 = function(value, offset, noAssert) {
var buffer = this;
assert.ok(value !== undefined && value !== null,
'missing value');
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset < buffer.length,
'Trying to write beyond buffer length');
assert.ok(offset < buffer.length,
'Trying to write beyond buffer length');
verifsint(value, 0x7f, -0xf0);
verifsint(value, 0x7f, -0xf0);
}
if (value >= 0) {
buffer.writeUInt8NoChk(value, offset, bigEndian);
buffer.writeUInt8(value, offset, noAssert);
} else {
buffer.writeUInt8NoChk(0xff + value + 1, offset, bigEndian);
buffer.writeUInt8(0xff + value + 1, offset, noAssert);
}
};
function writeInt16(buffer, value, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
Buffer.prototype.writeInt16 = function(value, offset, bigEndian) {
var buffer = this;
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 1 < buffer.length,
'Trying to write beyond buffer length');
assert.ok(offset + 1 < buffer.length,
'Trying to write beyond buffer length');
verifsint(value, 0x7fff, -0xf000);
verifsint(value, 0x7fff, -0xf000);
}
if (value >= 0) {
buffer.writeUInt16NoChk(value, offset, bigEndian);
writeUInt16(buffer, value, offset, isBigEndian, noAssert);
} else {
buffer.writeUInt16NoChk(0xffff + value + 1, offset, bigEndian);
writeUInt16(buffer, 0xffff + value + 1, offset, isBigEndian, noAssert);
}
}
Buffer.prototype.writeInt16LE = function(value, offset, noAssert) {
writeInt16(this, value, offset, false, noAssert);
};
Buffer.prototype.writeInt16BE = function(value, offset, noAssert) {
writeInt16(this, value, offset, true, noAssert);
};
Buffer.prototype.writeInt32 = function(value, offset, bigEndian) {
var buffer = this;
function writeInt32(buffer, value, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 3 < buffer.length,
'Trying to write beyond buffer length');
assert.ok(offset + 3 < buffer.length,
'Trying to write beyond buffer length');
verifsint(value, 0x7fffffff, -0xf0000000);
}
verifsint(value, 0x7fffffff, -0xf0000000);
if (value >= 0) {
buffer.writeUInt32NoChk(value, offset, bigEndian);
writeUInt32(buffer, value, offset, isBigEndian, noAssert);
} else {
buffer.writeUInt32NoChk(0xffffffff + value + 1, offset, bigEndian);
writeUInt32(buffer, 0xffffffff + value + 1, offset, isBigEndian, noAssert);
}
}
Buffer.prototype.writeInt32LE = function(value, offset, noAssert) {
writeInt32(this, value, offset, false, noAssert);
};
Buffer.prototype.writeInt32BE = function(value, offset, noAssert) {
writeInt32(this, value, offset, true, noAssert);
};
Buffer.prototype.writeFloat = function(value, offset, bigEndian) {
var buffer = this;
function writeFloat(buffer, value, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 3 < buffer.length,
'Trying to write beyond buffer length');
assert.ok(offset + 3 < buffer.length,
'Trying to write beyond buffer length');
verifIEEE754(value, 3.4028234663852886e+38, -3.4028234663852886e+38);
}
verifIEEE754(value, 3.4028234663852886e+38, -3.4028234663852886e+38);
require('buffer_ieee754').writeIEEE754(buffer, value, offset, bigEndian,
require('buffer_ieee754').writeIEEE754(buffer, value, offset, isBigEndian,
23, 4);
}
Buffer.prototype.writeFloatLE = function(value, offset, noAssert) {
writeFloat(this, value, offset, false, noAssert);
};
Buffer.prototype.writeFloatBE = function(value, offset, noAssert) {
writeFloat(this, value, offset, true, noAssert);
};
Buffer.prototype.writeDouble = function(value, offset, bigEndian) {
var buffer = this;
function writeDouble(buffer, value, offset, isBigEndian, noAssert) {
if (!noAssert) {
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(value !== undefined && value !== null,
'missing value');
assert.ok(typeof (isBigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(typeof (bigEndian) === 'boolean',
'missing or invalid endian');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset !== undefined && offset !== null,
'missing offset');
assert.ok(offset + 7 < buffer.length,
'Trying to write beyond buffer length');
assert.ok(offset + 7 < buffer.length,
'Trying to write beyond buffer length');
verifIEEE754(value, 1.7976931348623157E+308, -1.7976931348623157E+308);
}
verifIEEE754(value, 1.7976931348623157E+308, -1.7976931348623157E+308);
require('buffer_ieee754').writeIEEE754(buffer, value, offset, bigEndian,
require('buffer_ieee754').writeIEEE754(buffer, value, offset, isBigEndian,
52, 8);
}
Buffer.prototype.writeDoubleLE = function(value, offset, noAssert) {
writeDouble(this, value, offset, false, noAssert);
};
Buffer.prototype.writeDoubleBE = function(value, offset, noAssert) {
writeDouble(this, value, offset, true, noAssert);
};

14
lib/buffer_ieee754.js
View File

@ -30,15 +30,14 @@
//
// Modifications to writeIEEE754 to support negative zeroes made by Brian White
exports.readIEEE754 = function(buffer, offset, endian, mLen, nBytes) {
exports.readIEEE754 = function(buffer, offset, isBE, mLen, nBytes) {
var e, m,
bBE = endian,
eLen = nBytes * 8 - mLen - 1,
eMax = (1 << eLen) - 1,
eBias = eMax >> 1,
nBits = -7,
i = bBE ? 0 : (nBytes - 1),
d = bBE ? 1 : -1,
i = isBE ? 0 : (nBytes - 1),
d = isBE ? 1 : -1,
s = buffer[offset + i];
i += d;
@ -64,15 +63,14 @@ exports.readIEEE754 = function(buffer, offset, endian, mLen, nBytes) {
return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
};
exports.writeIEEE754 = function(buffer, value, offset, endian, mLen, nBytes) {
exports.writeIEEE754 = function(buffer, value, offset, isBE, mLen, nBytes) {
var e, m, c,
bBE = endian,
eLen = nBytes * 8 - mLen - 1,
eMax = (1 << eLen) - 1,
eBias = eMax >> 1,
rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0),
i = bBE ? (nBytes-1) : 0,
d = bBE ? -1 : 1,
i = isBE ? (nBytes-1) : 0,
d = isBE ? -1 : 1,
s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
value = Math.abs(value);

61
test/simple/test-readdouble.js
View File

@ -8,6 +8,7 @@ var ASSERT = require('assert');
*/
function test() {
var buffer = new Buffer(8);
buffer[0] = 0x55;
buffer[1] = 0x55;
buffer[2] = 0x55;
@ -16,8 +17,8 @@ function test() {
buffer[5] = 0x55;
buffer[6] = 0xd5;
buffer[7] = 0x3f;
ASSERT.equal(1.1945305291680097e+103, buffer.readDouble(0, true));
ASSERT.equal(0.3333333333333333, buffer.readDouble(0, false));
ASSERT.equal(1.1945305291680097e+103, buffer.readDoubleBE(0));
ASSERT.equal(0.3333333333333333, buffer.readDoubleLE(0));
buffer[0] = 1;
buffer[1] = 0;
@ -27,18 +28,18 @@ function test() {
buffer[5] = 0;
buffer[6] = 0xf0;
buffer[7] = 0x3f;
ASSERT.equal(7.291122019655968e-304, buffer.readDouble(0, true));
ASSERT.equal(1.0000000000000002, buffer.readDouble(0, false));
ASSERT.equal(7.291122019655968e-304, buffer.readDoubleBE(0));
ASSERT.equal(1.0000000000000002, buffer.readDoubleLE(0));
buffer[0] = 2;
ASSERT.equal(4.778309726801735e-299, buffer.readDouble(0, true));
ASSERT.equal(1.0000000000000004, buffer.readDouble(0, false));
ASSERT.equal(4.778309726801735e-299, buffer.readDoubleBE(0));
ASSERT.equal(1.0000000000000004, buffer.readDoubleLE(0));
buffer[0] = 1;
buffer[6] = 0;
buffer[7] = 0;
ASSERT.equal(7.291122019556398e-304, buffer.readDouble(0, true));
ASSERT.equal(5e-324, buffer.readDouble(0, false));
ASSERT.equal(7.291122019556398e-304, buffer.readDoubleBE(0));
ASSERT.equal(5e-324, buffer.readDoubleLE(0));
buffer[0] = 0xff;
buffer[1] = 0xff;
@ -48,13 +49,13 @@ function test() {
buffer[5] = 0xff;
buffer[6] = 0x0f;
buffer[7] = 0x00;
ASSERT.ok(isNaN(buffer.readDouble(0, true)));
ASSERT.equal(2.225073858507201e-308, buffer.readDouble(0, false));
ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
ASSERT.equal(2.225073858507201e-308, buffer.readDoubleLE(0));
buffer[6] = 0xef;
buffer[7] = 0x7f;
ASSERT.ok(isNaN(buffer.readDouble(0, true)));
ASSERT.equal(1.7976931348623157e+308, buffer.readDouble(0, false));
ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
ASSERT.equal(1.7976931348623157e+308, buffer.readDoubleLE(0));
buffer[0] = 0;
buffer[1] = 0;
@ -64,42 +65,42 @@ function test() {
buffer[5] = 0;
buffer[6] = 0xf0;
buffer[7] = 0x3f;
ASSERT.equal(3.03865e-319, buffer.readDouble(0, true));
ASSERT.equal(1, buffer.readDouble(0, false));
ASSERT.equal(3.03865e-319, buffer.readDoubleBE(0));
ASSERT.equal(1, buffer.readDoubleLE(0));
buffer[6] = 0;
buffer[7] = 0x40;
ASSERT.equal(3.16e-322, buffer.readDouble(0, true));
ASSERT.equal(2, buffer.readDouble(0, false));
ASSERT.equal(3.16e-322, buffer.readDoubleBE(0));
ASSERT.equal(2, buffer.readDoubleLE(0));
buffer[7] = 0xc0;
ASSERT.equal(9.5e-322, buffer.readDouble(0, true));
ASSERT.equal(-2, buffer.readDouble(0, false));
ASSERT.equal(9.5e-322, buffer.readDoubleBE(0));
ASSERT.equal(-2, buffer.readDoubleLE(0));
buffer[6] = 0x10;
buffer[7] = 0;
ASSERT.equal(2.0237e-320, buffer.readDouble(0, true));
ASSERT.equal(2.2250738585072014e-308, buffer.readDouble(0, false));
ASSERT.equal(2.0237e-320, buffer.readDoubleBE(0));
ASSERT.equal(2.2250738585072014e-308, buffer.readDoubleLE(0));
buffer[6] = 0;
ASSERT.equal(0, buffer.readDouble(0, true));
ASSERT.equal(0, buffer.readDouble(0, false));
ASSERT.equal(false, 1/buffer.readDouble(0, false)<0);
ASSERT.equal(0, buffer.readDoubleBE(0));
ASSERT.equal(0, buffer.readDoubleLE(0));
ASSERT.equal(false, 1/buffer.readDoubleLE(0)<0);
buffer[7] = 0x80;
ASSERT.equal(6.3e-322, buffer.readDouble(0, true));
ASSERT.equal(0, buffer.readDouble(0, false));
ASSERT.equal(true, 1/buffer.readDouble(0, false)<0);
ASSERT.equal(6.3e-322, buffer.readDoubleBE(0));
ASSERT.equal(0, buffer.readDoubleLE(0));
ASSERT.equal(true, 1/buffer.readDoubleLE(0)<0);
buffer[6] = 0xf0;
buffer[7] = 0x7f;
ASSERT.equal(3.0418e-319, buffer.readDouble(0, true));
ASSERT.equal(Infinity, buffer.readDouble(0, false));
ASSERT.equal(3.0418e-319, buffer.readDoubleBE(0));
ASSERT.equal(Infinity, buffer.readDoubleLE(0));
buffer[6] = 0xf0;
buffer[7] = 0xff;
ASSERT.equal(3.04814e-319, buffer.readDouble(0, true));
ASSERT.equal(-Infinity, buffer.readDouble(0, false));
ASSERT.equal(3.04814e-319, buffer.readDoubleBE(0));
ASSERT.equal(-Infinity, buffer.readDoubleLE(0));
}

37
test/simple/test-readfloat.js
View File

@ -8,60 +8,61 @@ var ASSERT = require('assert');
*/
function test() {
var buffer = new Buffer(4);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0x80;
buffer[3] = 0x3f;
ASSERT.equal(4.600602988224807e-41, buffer.readFloat(0, true));
ASSERT.equal(1, buffer.readFloat(0, false));
ASSERT.equal(4.600602988224807e-41, buffer.readFloatBE(0));
ASSERT.equal(1, buffer.readFloatLE(0));
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0xc0;
ASSERT.equal(2.6904930515036488e-43, buffer.readFloat(0, true));
ASSERT.equal(-2, buffer.readFloat(0, false));
ASSERT.equal(2.6904930515036488e-43, buffer.readFloatBE(0));
ASSERT.equal(-2, buffer.readFloatLE(0));
buffer[0] = 0xff;
buffer[1] = 0xff;
buffer[2] = 0x7f;
buffer[3] = 0x7f;
ASSERT.ok(isNaN(buffer.readFloat(0, true)));
ASSERT.equal(3.4028234663852886e+38, buffer.readFloat(0, false));
ASSERT.ok(isNaN(buffer.readFloatBE(0)));
ASSERT.equal(3.4028234663852886e+38, buffer.readFloatLE(0));
buffer[0] = 0xab;
buffer[1] = 0xaa;
buffer[2] = 0xaa;
buffer[3] = 0x3e;
ASSERT.equal(-1.2126478207002966e-12, buffer.readFloat(0, true));
ASSERT.equal(0.3333333432674408, buffer.readFloat(0, false));
ASSERT.equal(-1.2126478207002966e-12, buffer.readFloatBE(0));
ASSERT.equal(0.3333333432674408, buffer.readFloatLE(0));
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
ASSERT.equal(0, buffer.readFloat(0, true));
ASSERT.equal(0, buffer.readFloat(0, false));
ASSERT.equal(false, 1/buffer.readFloat(0, false)<0);
ASSERT.equal(0, buffer.readFloatBE(0));
ASSERT.equal(0, buffer.readFloatLE(0));
ASSERT.equal(false, 1/buffer.readFloatLE(0)<0);
buffer[3] = 0x80;
ASSERT.equal(1.793662034335766e-43, buffer.readFloat(0, true));
ASSERT.equal(0, buffer.readFloat(0, false));
ASSERT.equal(true, 1/buffer.readFloat(0, false)<0);
ASSERT.equal(1.793662034335766e-43, buffer.readFloatBE(0));
ASSERT.equal(0, buffer.readFloatLE(0));
ASSERT.equal(true, 1/buffer.readFloatLE(0)<0);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0x80;
buffer[3] = 0x7f;
ASSERT.equal(4.609571298396486e-41, buffer.readFloat(0, true));
ASSERT.equal(Infinity, buffer.readFloat(0, false));
ASSERT.equal(4.609571298396486e-41, buffer.readFloatBE(0));
ASSERT.equal(Infinity, buffer.readFloatLE(0));
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0x80;
buffer[3] = 0xff;
ASSERT.equal(4.627507918739843e-41, buffer.readFloat(0, true));
ASSERT.equal(-Infinity, buffer.readFloat(0, false));
ASSERT.equal(4.627507918739843e-41, buffer.readFloatBE(0));
ASSERT.equal(-Infinity, buffer.readFloatLE(0));
}

68
test/simple/test-readint.js
View File

@ -10,39 +10,34 @@ function test8() {
var data = new Buffer(4);
data[0] = 0x23;
ASSERT.equal(0x23, data.readInt8(0, true));
ASSERT.equal(0x23, data.readInt8(0, false));
ASSERT.equal(0x23, data.readInt8(0));
data[0] = 0xff;
ASSERT.equal(-1, data.readInt8(0, true));
ASSERT.equal(-1, data.readInt8(0, false));
ASSERT.equal(-1, data.readInt8(0));
data[0] = 0x87;
data[1] = 0xab;
data[2] = 0x7c;
data[3] = 0xef;
ASSERT.equal(-121, data.readInt8(0, true));
ASSERT.equal(-85, data.readInt8(1, true));
ASSERT.equal(124, data.readInt8(2, true));
ASSERT.equal(-17, data.readInt8(3, true));
ASSERT.equal(-121, data.readInt8(0, false));
ASSERT.equal(-85, data.readInt8(1, false));
ASSERT.equal(124, data.readInt8(2, false));
ASSERT.equal(-17, data.readInt8(3, false));
ASSERT.equal(-121, data.readInt8(0));
ASSERT.equal(-85, data.readInt8(1));
ASSERT.equal(124, data.readInt8(2));
ASSERT.equal(-17, data.readInt8(3));
}
function test16() {
var buffer = new Buffer(6);
buffer[0] = 0x16;
buffer[1] = 0x79;
ASSERT.equal(0x1679, buffer.readInt16(0, true));
ASSERT.equal(0x7916, buffer.readInt16(0, false));
ASSERT.equal(0x1679, buffer.readInt16BE(0));
ASSERT.equal(0x7916, buffer.readInt16LE(0));
buffer[0] = 0xff;
buffer[1] = 0x80;
ASSERT.equal(-128, buffer.readInt16(0, true));
ASSERT.equal(-32513, buffer.readInt16(0, false));
ASSERT.equal(-128, buffer.readInt16BE(0));
ASSERT.equal(-32513, buffer.readInt16LE(0));
/* test offset with weenix */
buffer[0] = 0x77;
@ -51,34 +46,35 @@ function test16() {
buffer[3] = 0x6e;
buffer[4] = 0x69;
buffer[5] = 0x78;
ASSERT.equal(0x7765, buffer.readInt16(0, true));
ASSERT.equal(0x6565, buffer.readInt16(1, true));
ASSERT.equal(0x656e, buffer.readInt16(2, true));
ASSERT.equal(0x6e69, buffer.readInt16(3, true));
ASSERT.equal(0x6978, buffer.readInt16(4, true));
ASSERT.equal(0x6577, buffer.readInt16(0, false));
ASSERT.equal(0x6565, buffer.readInt16(1, false));
ASSERT.equal(0x6e65, buffer.readInt16(2, false));
ASSERT.equal(0x696e, buffer.readInt16(3, false));
ASSERT.equal(0x7869, buffer.readInt16(4, false));
ASSERT.equal(0x7765, buffer.readInt16BE(0));
ASSERT.equal(0x6565, buffer.readInt16BE(1));
ASSERT.equal(0x656e, buffer.readInt16BE(2));
ASSERT.equal(0x6e69, buffer.readInt16BE(3));
ASSERT.equal(0x6978, buffer.readInt16BE(4));
ASSERT.equal(0x6577, buffer.readInt16LE(0));
ASSERT.equal(0x6565, buffer.readInt16LE(1));
ASSERT.equal(0x6e65, buffer.readInt16LE(2));
ASSERT.equal(0x696e, buffer.readInt16LE(3));
ASSERT.equal(0x7869, buffer.readInt16LE(4));
}
function test32() {
var buffer = new Buffer(6);
buffer[0] = 0x43;
buffer[1] = 0x53;
buffer[2] = 0x16;
buffer[3] = 0x79;
ASSERT.equal(0x43531679, buffer.readInt32(0, true));
ASSERT.equal(0x79165343, buffer.readInt32(0, false));
ASSERT.equal(0x43531679, buffer.readInt32BE(0));
ASSERT.equal(0x79165343, buffer.readInt32LE(0));
buffer[0] = 0xff;
buffer[1] = 0xfe;
buffer[2] = 0xef;
buffer[3] = 0xfa;
ASSERT.equal(-69638, buffer.readInt32(0, true));
ASSERT.equal(-84934913, buffer.readInt32(0, false));
ASSERT.equal(-69638, buffer.readInt32BE(0));
ASSERT.equal(-84934913, buffer.readInt32LE(0));
buffer[0] = 0x42;
buffer[1] = 0xc3;
@ -86,12 +82,12 @@ function test32() {
buffer[3] = 0xa9;
buffer[4] = 0x36;
buffer[5] = 0x17;
ASSERT.equal(0x42c395a9, buffer.readInt32(0, true));
ASSERT.equal(-1013601994, buffer.readInt32(1, true));
ASSERT.equal(-1784072681, buffer.readInt32(2, true));
ASSERT.equal(-1449802942, buffer.readInt32(0, false));
ASSERT.equal(917083587, buffer.readInt32(1, false));
ASSERT.equal(389458325, buffer.readInt32(2, false));
ASSERT.equal(0x42c395a9, buffer.readInt32BE(0));
ASSERT.equal(-1013601994, buffer.readInt32BE(1));
ASSERT.equal(-1784072681, buffer.readInt32BE(2));
ASSERT.equal(-1449802942, buffer.readInt32LE(0));
ASSERT.equal(917083587, buffer.readInt32LE(1));
ASSERT.equal(389458325, buffer.readInt32LE(2));
}

51
test/simple/test-readuint.js
View File

@ -13,21 +13,18 @@ var ASSERT = require('assert');
*/
function test8() {
var data = new Buffer(4);
data[0] = 23;
data[1] = 23;
data[2] = 23;
data[3] = 23;
ASSERT.equal(23, data.readUInt8(0, true));
ASSERT.equal(23, data.readUInt8(0, false));
ASSERT.equal(23, data.readUInt8(1, true));
ASSERT.equal(23, data.readUInt8(1, false));
ASSERT.equal(23, data.readUInt8(2, true));
ASSERT.equal(23, data.readUInt8(2, false));
ASSERT.equal(23, data.readUInt8(3, true));
ASSERT.equal(23, data.readUInt8(3, false));
ASSERT.equal(23, data.readUInt8(0));
ASSERT.equal(23, data.readUInt8(1));
ASSERT.equal(23, data.readUInt8(2));
ASSERT.equal(23, data.readUInt8(3));
data[0] = 255; /* If it became a signed int, would be -1 */
ASSERT.equal(255, data.readUInt8(0, true));
ASSERT.equal(255, data.readUInt8(0, false));
ASSERT.equal(255, data.readUInt8(0));
}
@ -46,20 +43,17 @@ function test16() {
data[1] = 0x23;
data[2] = 0x42;
data[3] = 0x3f;
ASSERT.equal(0x23, data.readUInt16(0, true));
ASSERT.equal(0x2342, data.readUInt16(1, true));
ASSERT.equal(0x423f, data.readUInt16(2, true));
ASSERT.equal(0x2300, data.readUInt16(0, false));
ASSERT.equal(0x4223, data.readUInt16(1, false));
ASSERT.equal(0x3f42, data.readUInt16(2, false));
ASSERT.equal(0x23, data.readUInt16BE(0));
ASSERT.equal(0x2342, data.readUInt16BE(1));
ASSERT.equal(0x423f, data.readUInt16BE(2));
ASSERT.equal(0x2300, data.readUInt16LE(0));
ASSERT.equal(0x4223, data.readUInt16LE(1));
ASSERT.equal(0x3f42, data.readUInt16LE(2));
data[0] = 0xfe;
data[1] = 0xfe;
ASSERT.equal(0xfefe, data.readUInt16(0, true));
ASSERT.equal(0xfefe, data.readUInt16(0, false));
ASSERT.equal(0xfefe, data.readUInt16BE(0));
ASSERT.equal(0xfefe, data.readUInt16LE(0));
}
@ -72,20 +66,19 @@ function test16() {
*/
function test32() {
var data = new Buffer(8);
data[0] = 0x32;
data[1] = 0x65;
data[2] = 0x42;
data[3] = 0x56;
data[4] = 0x23;
data[5] = 0xff;
ASSERT.equal(0x32654256, data.readUInt32(0, true));
ASSERT.equal(0x65425623, data.readUInt32(1, true));
ASSERT.equal(0x425623ff, data.readUInt32(2, true));
ASSERT.equal(0x56426532, data.readUInt32(0, false));
ASSERT.equal(0x23564265, data.readUInt32(1, false));
ASSERT.equal(0xff235642, data.readUInt32(2, false));
ASSERT.equal(0x32654256, data.readUInt32BE(0));
ASSERT.equal(0x65425623, data.readUInt32BE(1));
ASSERT.equal(0x425623ff, data.readUInt32BE(2));
ASSERT.equal(0x56426532, data.readUInt32LE(0));
ASSERT.equal(0x23564265, data.readUInt32LE(1));
ASSERT.equal(0xff235642, data.readUInt32LE(2));
}

21
test/simple/test-writedouble.js
View File

@ -5,8 +5,9 @@ var ASSERT = require('assert');
function test() {
var buffer = new Buffer(16);
buffer.writeDouble(2.225073858507201e-308, 0, true);
buffer.writeDouble(2.225073858507201e-308, 8, false);
buffer.writeDoubleBE(2.225073858507201e-308, 0);
buffer.writeDoubleLE(2.225073858507201e-308, 8);
ASSERT.equal(0x00, buffer[0]);
ASSERT.equal(0x0f, buffer[1]);
ASSERT.equal(0xff, buffer[2]);
@ -24,8 +25,8 @@ function test() {
ASSERT.equal(0x0f, buffer[14]);
ASSERT.equal(0x00, buffer[15]);
buffer.writeDouble(1.0000000000000004, 0, true);
buffer.writeDouble(1.0000000000000004, 8, false);
buffer.writeDoubleBE(1.0000000000000004, 0);
buffer.writeDoubleLE(1.0000000000000004, 8);
ASSERT.equal(0x3f, buffer[0]);
ASSERT.equal(0xf0, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
@ -43,8 +44,8 @@ function test() {
ASSERT.equal(0xf0, buffer[14]);
ASSERT.equal(0x3f, buffer[15]);
buffer.writeDouble(-2, 0, true);
buffer.writeDouble(-2, 8, false);
buffer.writeDoubleBE(-2, 0);
buffer.writeDoubleLE(-2, 8);
ASSERT.equal(0xc0, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
@ -62,8 +63,8 @@ function test() {
ASSERT.equal(0x00, buffer[14]);
ASSERT.equal(0xc0, buffer[15]);
buffer.writeDouble(1.7976931348623157e+308, 0, true);
buffer.writeDouble(1.7976931348623157e+308, 8, false);
buffer.writeDoubleBE(1.7976931348623157e+308, 0);
buffer.writeDoubleLE(1.7976931348623157e+308, 8);
ASSERT.equal(0x7f, buffer[0]);
ASSERT.equal(0xef, buffer[1]);
ASSERT.equal(0xff, buffer[2]);
@ -81,8 +82,8 @@ function test() {
ASSERT.equal(0xef, buffer[14]);
ASSERT.equal(0x7f, buffer[15]);
buffer.writeDouble(0*-1, 0, true);
buffer.writeDouble(0*-1, 8, false);
buffer.writeDoubleBE(0*-1, 0);
buffer.writeDoubleLE(0*-1, 8);
ASSERT.equal(0x80, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);

21
test/simple/test-writefloat.js
View File

@ -5,8 +5,9 @@ var ASSERT = require('assert');
function test() {
var buffer = new Buffer(8);
buffer.writeFloat(1, 0, true);
buffer.writeFloat(1, 4, false);
buffer.writeFloatBE(1, 0);
buffer.writeFloatLE(1, 4);
ASSERT.equal(0x3f, buffer[0]);
ASSERT.equal(0x80, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
@ -16,8 +17,8 @@ function test() {
ASSERT.equal(0x80, buffer[6]);
ASSERT.equal(0x3f, buffer[7]);
buffer.writeFloat(1.793662034335766e-43, 0, true);
buffer.writeFloat(1.793662034335766e-43, 4, false);
buffer.writeFloatBE(1.793662034335766e-43, 0);
buffer.writeFloatLE(1.793662034335766e-43, 4);
ASSERT.equal(0x00, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
@ -27,8 +28,8 @@ function test() {
ASSERT.equal(0x00, buffer[6]);
ASSERT.equal(0x00, buffer[7]);
buffer.writeFloat(1/3, 0, true);
buffer.writeFloat(1/3, 4, false);
buffer.writeFloatBE(1/3, 0);
buffer.writeFloatLE(1/3, 4);
ASSERT.equal(0x3e, buffer[0]);
ASSERT.equal(0xaa, buffer[1]);
ASSERT.equal(0xaa, buffer[2]);
@ -38,8 +39,8 @@ function test() {
ASSERT.equal(0xaa, buffer[6]);
ASSERT.equal(0x3e, buffer[7]);
buffer.writeFloat(3.4028234663852886e+38, 0, true);
buffer.writeFloat(3.4028234663852886e+38, 4, false);
buffer.writeFloatBE(3.4028234663852886e+38, 0);
buffer.writeFloatLE(3.4028234663852886e+38, 4);
ASSERT.equal(0x7f, buffer[0]);
ASSERT.equal(0x7f, buffer[1]);
ASSERT.equal(0xff, buffer[2]);
@ -49,8 +50,8 @@ function test() {
ASSERT.equal(0x7f, buffer[6]);
ASSERT.equal(0x7f, buffer[7]);
buffer.writeFloat(0*-1, 0, true);
buffer.writeFloat(0*-1, 4, false);
buffer.writeFloatBE(0*-1, 0);
buffer.writeFloatLE(0*-1, 4);
ASSERT.equal(0x80, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);

44
test/simple/test-writeint.js
View File

@ -4,44 +4,43 @@
var ASSERT = require('assert');
function test8() {
var buffer = new Buffer(4);
buffer.writeInt8(0x23, 0, true);
buffer.writeInt8(0x23, 1, false);
buffer.writeInt8(-5, 2, true);
buffer.writeInt8(-5, 3, false);
var buffer = new Buffer(2);
buffer.writeInt8(0x23, 0);
buffer.writeInt8(-5, 1);
ASSERT.equal(0x23, buffer[0]);
ASSERT.equal(0x23, buffer[1]);
ASSERT.equal(0xfb, buffer[2]);
ASSERT.equal(0xfb, buffer[3]);
ASSERT.equal(0xfb, buffer[1]);
/* Make sure we handle truncation correctly */
ASSERT.throws(function() {
buffer.writeInt8(0xabc, 0, true);
buffer.writeInt8(0xabc, 0);
});
ASSERT.throws(function() {
buffer.writeInt8(0xabc, 0, false);
buffer.writeInt8(0xabc, 0);
});
}
function test16() {
var buffer = new Buffer(6);
buffer.writeInt16(0x0023, 0, true);
buffer.writeInt16(0x0023, 2, false);
buffer.writeInt16BE(0x0023, 0);
buffer.writeInt16LE(0x0023, 2);
ASSERT.equal(0x00, buffer[0]);
ASSERT.equal(0x23, buffer[1]);
ASSERT.equal(0x23, buffer[2]);
ASSERT.equal(0x00, buffer[3]);
buffer.writeInt16(-5, 0, true);
buffer.writeInt16(-5, 2, false);
buffer.writeInt16BE(-5, 0);
buffer.writeInt16LE(-5, 2);
ASSERT.equal(0xff, buffer[0]);
ASSERT.equal(0xfb, buffer[1]);
ASSERT.equal(0xfb, buffer[2]);
ASSERT.equal(0xff, buffer[3]);
buffer.writeInt16(-1679, 1, true);
buffer.writeInt16(-1679, 3, false);
buffer.writeInt16BE(-1679, 1);
buffer.writeInt16LE(-1679, 3);
ASSERT.equal(0xf9, buffer[1]);
ASSERT.equal(0x71, buffer[2]);
ASSERT.equal(0x71, buffer[3]);
@ -51,8 +50,9 @@ function test16() {
function test32() {
var buffer = new Buffer(8);
buffer.writeInt32(0x23, 0, true);
buffer.writeInt32(0x23, 4, false);
buffer.writeInt32BE(0x23, 0);
buffer.writeInt32LE(0x23, 4);
ASSERT.equal(0x00, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
@ -62,8 +62,8 @@ function test32() {
ASSERT.equal(0x00, buffer[6]);
ASSERT.equal(0x00, buffer[7]);
buffer.writeInt32(-5, 0, true);
buffer.writeInt32(-5, 4, false);
buffer.writeInt32BE(-5, 0);
buffer.writeInt32LE(-5, 4);
ASSERT.equal(0xff, buffer[0]);
ASSERT.equal(0xff, buffer[1]);
ASSERT.equal(0xff, buffer[2]);
@ -73,8 +73,8 @@ function test32() {
ASSERT.equal(0xff, buffer[6]);
ASSERT.equal(0xff, buffer[7]);
buffer.writeInt32(-805306713, 0, true);
buffer.writeInt32(-805306713, 4, false);
buffer.writeInt32BE(-805306713, 0);
buffer.writeInt32LE(-805306713, 4);
ASSERT.equal(0xcf, buffer[0]);
ASSERT.equal(0xff, buffer[1]);
ASSERT.equal(0xfe, buffer[2]);

55
test/simple/test-writeuint.js
View File

@ -12,25 +12,29 @@ var ASSERT = require('assert');
*/
function test8() {
var data = new Buffer(4);
data.writeUInt8(23, 0, true);
data.writeUInt8(23, 1, true);
data.writeUInt8(23, 2, true);
data.writeUInt8(23, 3, true);
data.writeUInt8(23, 0);
data.writeUInt8(23, 1);
data.writeUInt8(23, 2);
data.writeUInt8(23, 3);
ASSERT.equal(23, data[0]);
ASSERT.equal(23, data[1]);
ASSERT.equal(23, data[2]);
ASSERT.equal(23, data[3]);
data.writeUInt8(23, 0, false);
data.writeUInt8(23, 1, false);
data.writeUInt8(23, 2, false);
data.writeUInt8(23, 3, false);
data.writeUInt8(23, 0);
data.writeUInt8(23, 1);
data.writeUInt8(23, 2);
data.writeUInt8(23, 3);
ASSERT.equal(23, data[0]);
ASSERT.equal(23, data[1]);
ASSERT.equal(23, data[2]);
ASSERT.equal(23, data[3]);
data.writeUInt8(255, 0, true);
data.writeUInt8(255, 0);
ASSERT.equal(255, data[0]);
data.writeUInt8(255, 0, false);
data.writeUInt8(255, 0);
ASSERT.equal(255, data[0]);
}
@ -38,34 +42,37 @@ function test8() {
function test16() {
var value = 0x2343;
var data = new Buffer(4);
data.writeUInt16(value, 0, true);
data.writeUInt16BE(value, 0);
ASSERT.equal(0x23, data[0]);
ASSERT.equal(0x43, data[1]);
data.writeUInt16(value, 1, true);
data.writeUInt16BE(value, 1);
ASSERT.equal(0x23, data[1]);
ASSERT.equal(0x43, data[2]);
data.writeUInt16(value, 2, true);
data.writeUInt16BE(value, 2);
ASSERT.equal(0x23, data[2]);
ASSERT.equal(0x43, data[3]);
data.writeUInt16(value, 0, false);
data.writeUInt16LE(value, 0);
ASSERT.equal(0x23, data[1]);
ASSERT.equal(0x43, data[0]);
data.writeUInt16(value, 1, false);
data.writeUInt16LE(value, 1);
ASSERT.equal(0x23, data[2]);
ASSERT.equal(0x43, data[1]);
data.writeUInt16(value, 2, false);
data.writeUInt16LE(value, 2);
ASSERT.equal(0x23, data[3]);
ASSERT.equal(0x43, data[2]);
value = 0xff80;
data.writeUInt16(value, 0, false);
data.writeUInt16LE(value, 0);
ASSERT.equal(0xff, data[1]);
ASSERT.equal(0x80, data[0]);
data.writeUInt16(value, 0, true);
data.writeUInt16BE(value, 0);
ASSERT.equal(0xff, data[0]);
ASSERT.equal(0x80, data[1]);
}
@ -75,37 +82,37 @@ function test32() {
var data = new Buffer(6);
var value = 0xe7f90a6d;
data.writeUInt32(value, 0, true);
data.writeUInt32BE(value, 0);
ASSERT.equal(0xe7, data[0]);
ASSERT.equal(0xf9, data[1]);
ASSERT.equal(0x0a, data[2]);
ASSERT.equal(0x6d, data[3]);
data.writeUInt32(value, 1, true);
data.writeUInt32BE(value, 1);
ASSERT.equal(0xe7, data[1]);
ASSERT.equal(0xf9, data[2]);
ASSERT.equal(0x0a, data[3]);
ASSERT.equal(0x6d, data[4]);
data.writeUInt32(value, 2, true);
data.writeUInt32BE(value, 2);
ASSERT.equal(0xe7, data[2]);
ASSERT.equal(0xf9, data[3]);
ASSERT.equal(0x0a, data[4]);
ASSERT.equal(0x6d, data[5]);
data.writeUInt32(value, 0, false);
data.writeUInt32LE(value, 0);
ASSERT.equal(0xe7, data[3]);
ASSERT.equal(0xf9, data[2]);
ASSERT.equal(0x0a, data[1]);
ASSERT.equal(0x6d, data[0]);
data.writeUInt32(value, 1, false);
data.writeUInt32LE(value, 1);
ASSERT.equal(0xe7, data[4]);
ASSERT.equal(0xf9, data[3]);
ASSERT.equal(0x0a, data[2]);
ASSERT.equal(0x6d, data[1]);
data.writeUInt32(value, 2, false);
data.writeUInt32LE(value, 2);
ASSERT.equal(0xe7, data[5]);
ASSERT.equal(0xf9, data[4]);
ASSERT.equal(0x0a, data[3]);

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