mirror of
https://github.com/nabbar/golib.git
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96ed6f9a1f
- FIX: potential CWE-400 with bufio.ReadBytes & bufio.ReadSlices, with no limited read buffer - ADD: test to check overflow buffer with discard or error - REFACTOR: all buffering package, parsing process - UPDATE: doc, examples, test following changes - OPTIMIZE: rework code to optimize process - REWORK: benchmark to check benefice of optimization - FIX: wording error Package IOUtils/Multi: - REWORK: re-design all package to allow sequential/parallel mode - UPDATE: package with adaptive mode to allow switch automaticly between sequential and parallel mode following measurment of sample - OPTIMIZE: code to maximize bandwith and reduce time of write - UPDATE: documentation, test and comments - REWORK: testing organization and benchmark aggregation Package HttpServer: - FIX: bug with dial addr rewrite for healtcheck & testing PortUse Package Logger/HookFile: - FIX: bug with race condition on aggregator counter file Other: - Bump dependencies - FIX: format / import file
81 lines
3.1 KiB
Go
81 lines
3.1 KiB
Go
/*
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* MIT License
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*
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* Copyright (c) 2025 Nicolas JUHEL
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*
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*/
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package delim
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import (
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"io"
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"sync"
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libsiz "github.com/nabbar/golib/size"
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)
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// dlm is the internal implementation of the BufferDelim interface.
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// It wraps an io.ReadCloser with a buffered reader and tracks the delimiter character.
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//
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// Fields:
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// - i: The underlying io.ReadCloser that provides the input stream
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// - r: The delimiter rune used to separate data chunks
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// - b: The internal byte buffer used for reading chunks
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// - s: The maximum size of the buffer
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// - d: Flag indicating whether to discard data on buffer overflow
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//
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// The struct is not exported to maintain encapsulation and allow future implementation changes
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// without breaking the public API.
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type dlm struct {
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m sync.Mutex
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i io.ReadCloser // input io.ReadCloser
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r rune // delimiter rune character
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b []byte // buffer
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s libsiz.Size // size of buffer
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d bool // if max size is reached, discard overflow or return error
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}
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// Delim returns the delimiter rune configured for this BufferDelim instance.
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// This value is set during construction via New() and remains constant for the lifetime of the instance.
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func (o *dlm) Delim() rune {
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return o.r
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}
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// getDelimByte converts the delimiter rune to a byte for scanning.
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//
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// IMPORTANT LIMITATION: This method assumes the delimiter fits within a single byte (0-255).
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// For multi-byte Unicode delimiters (runes > 255), only the least significant byte is used,
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// which will NOT produce the expected behavior. This is a known limitation of using
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// scanning which only accepts byte delimiters.
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//
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// Supported delimiters include all ASCII characters (0-127) and extended ASCII (128-255):
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// - '\n' (newline), '\r' (carriage return), '\t' (tab)
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// - ',', '|', ';', ':', ' ' (common separators)
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// - '\x00' (null byte for C-style strings)
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// - Any single-byte character in range 0-255
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//
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// For multi-byte Unicode delimiters, consider using alternative approaches or
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// contribute a scanner-based implementation.
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func (o *dlm) getDelimByte() byte {
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return byte(o.r)
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}
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