Buffer.copy should copy through sourceEnd, as specified.
Improve test-buffer.js to cover all copy error cases. Fix off by one error in string_decoder.
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aa491518f4
Коммит
a2f70da4c9
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@ -177,7 +177,7 @@ into `buf2`, starting at the 8th byte in `buf2`.
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buf1.copy(buf2, 8, 16, 20);
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console.log(buf2.toString('ascii', 0, 25));
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// !!!!!!!!qrst!!!!!!!!!!!!!
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// !!!!!!!!qrstu!!!!!!!!!!!!
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### buffer.slice(start, end)
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@ -25,7 +25,7 @@ StringDecoder.prototype.write = function (buffer) {
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: buffer.length;
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// add the new bytes to the char buffer
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buffer.copy(this.charBuffer, this.charReceived, 0, i);
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buffer.copy(this.charBuffer, this.charReceived, 0, (i - 1));
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this.charReceived += i;
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if (this.charReceived < this.charLength) {
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@ -79,7 +79,7 @@ StringDecoder.prototype.write = function (buffer) {
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}
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// buffer the incomplete character bytes we got
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buffer.copy(this.charBuffer, 0, buffer.length - i, buffer.length);
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buffer.copy(this.charBuffer, 0, buffer.length - i, (buffer.length - 1));
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this.charReceived = i;
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if (buffer.length - i > 0) {
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@ -298,34 +298,41 @@ Handle<Value> Buffer::Copy(const Arguments &args) {
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ssize_t target_start = args[1]->Int32Value();
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ssize_t source_start = args[2]->Int32Value();
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ssize_t source_end = args[3]->IsInt32() ? args[3]->Int32Value()
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: source->length();
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: (source->length() - 1);
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if (source_end < source_start) {
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return ThrowException(Exception::Error(String::New(
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"sourceEnd < sourceStart")));
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}
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if (target_start < 0 || target_start > target->length()) {
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if (target_start < 0 || target_start >= target->length()) {
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return ThrowException(Exception::Error(String::New(
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"targetStart out of bounds")));
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}
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if (source_start < 0 || source_start > source->length()) {
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if (source_start < 0 || source_start >= source->length()) {
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return ThrowException(Exception::Error(String::New(
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"sourceStart out of bounds")));
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}
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if (source_end < 0 || source_end > source->length()) {
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if (source_end < 0 || source_end >= source->length()) {
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return ThrowException(Exception::Error(String::New(
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"sourceEnd out of bounds")));
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}
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ssize_t to_copy = MIN(source_end - source_start,
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target->length() - target_start);
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ssize_t to_copy = MIN( (source_end - source_start + 1),
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(target->length() - target_start) );
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memcpy((void*)(target->data() + target_start),
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(const void*)(source->data() + source_start),
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to_copy);
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if (source->handle_->StrictEquals(target->handle_)) {
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// need to use slightly slower memmove is the ranges might overlap
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memmove((void*)(target->data() + target_start),
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(const void*)(source->data() + source_start),
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to_copy);
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} else {
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memcpy((void*)(target->data() + target_start),
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(const void*)(source->data() + source_start),
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to_copy);
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}
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return scope.Close(Integer::New(to_copy));
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}
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@ -6,7 +6,7 @@ var Buffer = require('buffer').Buffer;
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var b = new Buffer(1024);
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console.log("b.length == " + b.length);
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assert.equal(1024, b.length);
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assert.strictEqual(1024, b.length);
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for (var i = 0; i < 1024; i++) {
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assert.ok(b[i] >= 0);
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@ -19,12 +19,96 @@ for (var i = 0; i < 1024; i++) {
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var c = new Buffer(512);
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var copied = b.copy(c, 0, 0, 512);
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assert.equal(512, copied);
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// copy 512 bytes, from 0 to 511.
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var copied = b.copy(c, 0, 0, 511);
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console.log("copied " + copied + " bytes from b into c");
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assert.strictEqual(512, copied);
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for (var i = 0; i < c.length; i++) {
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print('.');
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assert.equal(i % 256, c[i]);
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}
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console.log("");
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// try to copy 513 bytes, and hope we don't overrun c, which is only 512 long
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var copied = b.copy(c, 0, 0, 512);
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console.log("copied " + copied + " bytes from b into c");
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assert.strictEqual(512, copied);
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for (var i = 0; i < c.length; i++) {
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assert.equal(i % 256, c[i]);
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}
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// copy all of c back into b, without specifying sourceEnd
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var copied = c.copy(b, 0, 0);
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console.log("copied " + copied + " bytes from c back into b");
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assert.strictEqual(512, copied);
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for (var i = 0; i < b.length; i++) {
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assert.equal(i % 256, b[i]);
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}
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// copy 768 bytes from b into b
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var copied = b.copy(b, 0, 256, 1023);
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console.log("copied " + copied + " bytes from b into c");
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assert.strictEqual(768, copied);
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for (var i = 0; i < c.length; i++) {
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assert.equal(i % 256, c[i]);
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}
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var caught_error = null;
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// try to copy from before the beginning of b
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caught_error = null;
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try {
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var copied = b.copy(c, 0, 100, 10);
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} catch (err) {
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caught_error = err;
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}
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assert.strictEqual('sourceEnd < sourceStart', caught_error.message);
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// try to copy to before the beginning of c
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caught_error = null;
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try {
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var copied = b.copy(c, -1, 0, 10);
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} catch (err) {
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caught_error = err;
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}
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assert.strictEqual('targetStart out of bounds', caught_error.message);
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// try to copy to after the end of c
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caught_error = null;
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try {
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var copied = b.copy(c, 512, 0, 10);
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} catch (err) {
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caught_error = err;
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}
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assert.strictEqual('targetStart out of bounds', caught_error.message);
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// try to copy starting before the beginning of b
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caught_error = null;
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try {
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var copied = b.copy(c, 0, -1, 1);
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} catch (err) {
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caught_error = err;
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}
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assert.strictEqual('sourceStart out of bounds', caught_error.message);
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// try to copy starting after the end of b
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caught_error = null;
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try {
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var copied = b.copy(c, 0, 1024, 1024);
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} catch (err) {
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caught_error = err;
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}
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assert.strictEqual('sourceStart out of bounds', caught_error.message);
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// a too-low sourceEnd will get caught by earlier checks
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// try to copy ending after the end of b
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try {
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var copied = b.copy(c, 0, 1023, 1024);
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} catch (err) {
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caught_error = err;
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}
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assert.strictEqual('sourceEnd out of bounds', caught_error.message);
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var asciiString = "hello world";
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