Module wc 

Structs

WcCounts

Results from counting a byte slice.

Functions

count_all

Count all metrics using optimized individual passes.

count_all_parallel

Parallel counting of all metrics at once. Splits at newline boundaries for safe parallel word + max_line_length counting. Each chunk computes all metrics in a single traversal group, maximizing cache reuse.

count_bytes

Count bytes. Trivial but included for API consistency.

count_chars

Count characters, choosing behavior based on locale.

count_chars_c

Count characters in C/POSIX locale (each byte is one character).

count_chars_parallel

Count UTF-8 characters in parallel.

count_chars_utf8

Count UTF-8 characters by counting non-continuation bytes. A continuation byte has the bit pattern 10xxxxxx (0x80..0xBF). Every other byte starts a new character (ASCII, multi-byte leader, or invalid).

count_lines

Count newlines using SIMD-accelerated memchr. GNU wc counts newline bytes (\n), not logical lines.

count_lines_parallel

Count newlines in parallel using SIMD memchr + rayon. Each thread gets at least 1MB (to amortize rayon scheduling overhead).

count_lines_words

Count lines and words using optimized strategies per locale. UTF-8: fused single-pass for lines+words to avoid extra data traversal. C locale: AVX2 SIMD fused counter when available, scalar fallback otherwise.

count_lines_words_chars

Count lines, words, and chars using optimized strategies per locale.

count_lwb

Count lines + words + bytes in a single fused pass (the default wc mode). Avoids separate passes entirely — combines newline counting with word detection.

count_lwb_parallel

Parallel counting of lines + words + bytes only (no chars). Optimized for the default wc mode: avoids unnecessary char-counting pass. C locale: single fused pass per chunk counts BOTH lines and words. UTF-8: checks ASCII first for C locale fast path, else splits at newlines for safe parallel UTF-8 word counting.

count_lwc_parallel

Combined parallel counting of lines + words + chars. UTF-8: splits at newline boundaries for fused lines+words+chars per chunk. C locale: fused parallel lines+words with boundary adjustment + parallel chars.

count_words

Count words using locale-aware 3-state logic (default: UTF-8).

count_words_locale

Count words with explicit locale control using 3-state logic.

count_words_parallel

Count words in parallel with boundary adjustment.

is_utf8_locale

Detect if the current locale uses UTF-8 encoding.

max_line_length

Compute maximum display width, choosing behavior based on locale.

max_line_length_c

Compute maximum display width of any line (C/POSIX locale).

max_line_length_parallel

Parallel max line length computation. Splits at newline boundaries so each chunk independently computes correct max line width (since newlines reset position tracking).

max_line_length_utf8

Compute maximum display width of any line (UTF-8 locale).