lib/strconv: stof_data left_shift_table + pow5_table (#106 fold-2)
Port Hare's stof_data.ha tables: `let left_shift_table: [65]u16` (decimal-expansion metadata for leftshift_newdigits) + `let pow5_table: [0x051C]u8` (digits of 5^k for k=1..60). Cite ref/hare/strconv/ stof_data.ha. Literal-suffix init form (`0x0000u16`, `5u8`) — the only form cstage and wwstage both accept (cstage rejects bare-int literals in [N]u8 init as "not assignable", candidate #130). Module-level inits emit DATAW (raw .data) so bypass candidate #128's runtime store-width divergence. `powers_of_ten: [596][2]u64` (Eisel-Lemire fast-path) deferred to consumer-driven port — only stof.ha references it. Prerequisite for fold-3 (decimal.ha port) where leftshift_newdigits consumes both tables.
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95
lib/strconv/stof_data.ww
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95
lib/strconv/stof_data.ww
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// strconv — stof/ftos lookup tables. Mirrors ref/hare/strconv/stof_data.ha
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// byte-exact. Pure-data fold (strconv #106 fold-2, was fold-3 before drew
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// re-sequenced 2026-05-26): no logic, exercised transitively when fold-3's
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// `leftshift_newdigits` lands (ref/hare/strconv/decimal.ha:35).
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//
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// ww uses module-level `let` for compile-time array data (ref/hare/strconv
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// `const` has no ww keyword equivalent; lib/encoding/utf8/utf8.ww:48 sets
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// the precedent with [2048]i8 dfa). Literal suffixes (`u16`, `u8`) are
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// required because cstage rejects bare integer literals in `[N]u8`/`[N]u16`
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// init while wwstage accepts them; the suffixed form is the only shape
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// both stages agree on (candidate #130).
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//
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// `powers_of_ten: [596][2]u64` (ref/hare/strconv/stof_data.ha:73) is the
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// Eisel-Lemire fast-path table and is only consumed by stof.ha (a later
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// fold); deferred to its consumer-driven port per CLAUDE.md rule 9
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// (Hare-fidelity is API-shaped, and module-level tables follow their
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// caller's scope).
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package strconv;
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// ref/hare/strconv/stof_data.ha:4. Powers-of-five decimal-expansion
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// metadata for `leftshift_newdigits` (decimal.ha:35). The top 5 bits
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// of each entry are the new-digit-count `nn`; the low 11 bits index
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// `pow5_table` for the digits themselves.
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let left_shift_table: [65]u16 = [
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0x0000u16, 0x0800u16, 0x0801u16, 0x0803u16, 0x1006u16, 0x1009u16, 0x100Du16, 0x1812u16, 0x1817u16,
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0x181Du16, 0x2024u16, 0x202Bu16, 0x2033u16, 0x203Cu16, 0x2846u16, 0x2850u16, 0x285Bu16, 0x3067u16,
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0x3073u16, 0x3080u16, 0x388Eu16, 0x389Cu16, 0x38ABu16, 0x38BBu16, 0x40CCu16, 0x40DDu16, 0x40EFu16,
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0x4902u16, 0x4915u16, 0x4929u16, 0x513Eu16, 0x5153u16, 0x5169u16, 0x5180u16, 0x5998u16, 0x59B0u16,
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0x59C9u16, 0x61E3u16, 0x61FDu16, 0x6218u16, 0x6A34u16, 0x6A50u16, 0x6A6Du16, 0x6A8Bu16, 0x72AAu16,
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0x72C9u16, 0x72E9u16, 0x7B0Au16, 0x7B2Bu16, 0x7B4Du16, 0x8370u16, 0x8393u16, 0x83B7u16, 0x83DCu16,
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0x8C02u16, 0x8C28u16, 0x8C4Fu16, 0x9477u16, 0x949Fu16, 0x94C8u16, 0x9CF2u16, 0x051Cu16, 0x051Cu16,
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0x051Cu16, 0x051Cu16,
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];
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// ref/hare/strconv/stof_data.ha:15. Decimal digits of 5^k for k=1..60,
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// concatenated. Indexed via `left_shift_table` (above); each shift k
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// reads its `pow5_b - pow5_a` digits starting at `pow5_a`.
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let pow5_table: [0x051C]u8 = [
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5u8, 2u8, 5u8, 1u8, 2u8, 5u8, 6u8, 2u8, 5u8, 3u8, 1u8, 2u8, 5u8, 1u8, 5u8, 6u8, 2u8, 5u8, 7u8, 8u8, 1u8, 2u8, 5u8, 3u8,
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9u8, 0u8, 6u8, 2u8, 5u8, 1u8, 9u8, 5u8, 3u8, 1u8, 2u8, 5u8, 9u8, 7u8, 6u8, 5u8, 6u8, 2u8, 5u8, 4u8, 8u8, 8u8, 2u8, 8u8,
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1u8, 2u8, 5u8, 2u8, 4u8, 4u8, 1u8, 4u8, 0u8, 6u8, 2u8, 5u8, 1u8, 2u8, 2u8, 0u8, 7u8, 0u8, 3u8, 1u8, 2u8, 5u8, 6u8, 1u8,
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0u8, 3u8, 5u8, 1u8, 5u8, 6u8, 2u8, 5u8, 3u8, 0u8, 5u8, 1u8, 7u8, 5u8, 7u8, 8u8, 1u8, 2u8, 5u8, 1u8, 5u8, 2u8, 5u8, 8u8,
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7u8, 8u8, 9u8, 0u8, 6u8, 2u8, 5u8, 7u8, 6u8, 2u8, 9u8, 3u8, 9u8, 4u8, 5u8, 3u8, 1u8, 2u8, 5u8, 3u8, 8u8, 1u8, 4u8, 6u8,
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9u8, 7u8, 2u8, 6u8, 5u8, 6u8, 2u8, 5u8, 1u8, 9u8, 0u8, 7u8, 3u8, 4u8, 8u8, 6u8, 3u8, 2u8, 8u8, 1u8, 2u8, 5u8, 9u8, 5u8,
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3u8, 6u8, 7u8, 4u8, 3u8, 1u8, 6u8, 4u8, 0u8, 6u8, 2u8, 5u8, 4u8, 7u8, 6u8, 8u8, 3u8, 7u8, 1u8, 5u8, 8u8, 2u8, 0u8, 3u8,
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1u8, 2u8, 5u8, 2u8, 3u8, 8u8, 4u8, 1u8, 8u8, 5u8, 7u8, 9u8, 1u8, 0u8, 1u8, 5u8, 6u8, 2u8, 5u8, 1u8, 1u8, 9u8, 2u8, 0u8,
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9u8, 2u8, 8u8, 9u8, 5u8, 5u8, 0u8, 7u8, 8u8, 1u8, 2u8, 5u8, 5u8, 9u8, 6u8, 0u8, 4u8, 6u8, 4u8, 4u8, 7u8, 7u8, 5u8, 3u8,
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9u8, 0u8, 6u8, 2u8, 5u8, 2u8, 9u8, 8u8, 0u8, 2u8, 3u8, 2u8, 2u8, 3u8, 8u8, 7u8, 6u8, 9u8, 5u8, 3u8, 1u8, 2u8, 5u8, 1u8,
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4u8, 9u8, 0u8, 1u8, 1u8, 6u8, 1u8, 1u8, 9u8, 3u8, 8u8, 4u8, 7u8, 6u8, 5u8, 6u8, 2u8, 5u8, 7u8, 4u8, 5u8, 0u8, 5u8, 8u8,
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0u8, 5u8, 9u8, 6u8, 9u8, 2u8, 3u8, 8u8, 2u8, 8u8, 1u8, 2u8, 5u8, 3u8, 7u8, 2u8, 5u8, 2u8, 9u8, 0u8, 2u8, 9u8, 8u8, 4u8,
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6u8, 1u8, 9u8, 1u8, 4u8, 0u8, 6u8, 2u8, 5u8, 1u8, 8u8, 6u8, 2u8, 6u8, 4u8, 5u8, 1u8, 4u8, 9u8, 2u8, 3u8, 0u8, 9u8, 5u8,
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7u8, 0u8, 3u8, 1u8, 2u8, 5u8, 9u8, 3u8, 1u8, 3u8, 2u8, 2u8, 5u8, 7u8, 4u8, 6u8, 1u8, 5u8, 4u8, 7u8, 8u8, 5u8, 1u8, 5u8,
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6u8, 2u8, 5u8, 4u8, 6u8, 5u8, 6u8, 6u8, 1u8, 2u8, 8u8, 7u8, 3u8, 0u8, 7u8, 7u8, 3u8, 9u8, 2u8, 5u8, 7u8, 8u8, 1u8, 2u8,
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5u8, 2u8, 3u8, 2u8, 8u8, 3u8, 0u8, 6u8, 4u8, 3u8, 6u8, 5u8, 3u8, 8u8, 6u8, 9u8, 6u8, 2u8, 8u8, 9u8, 0u8, 6u8, 2u8, 5u8,
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1u8, 1u8, 6u8, 4u8, 1u8, 5u8, 3u8, 2u8, 1u8, 8u8, 2u8, 6u8, 9u8, 3u8, 4u8, 8u8, 1u8, 4u8, 4u8, 5u8, 3u8, 1u8, 2u8, 5u8,
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5u8, 8u8, 2u8, 0u8, 7u8, 6u8, 6u8, 0u8, 9u8, 1u8, 3u8, 4u8, 6u8, 7u8, 4u8, 0u8, 7u8, 2u8, 2u8, 6u8, 5u8, 6u8, 2u8, 5u8,
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2u8, 9u8, 1u8, 0u8, 3u8, 8u8, 3u8, 0u8, 4u8, 5u8, 6u8, 7u8, 3u8, 3u8, 7u8, 0u8, 3u8, 6u8, 1u8, 3u8, 2u8, 8u8, 1u8, 2u8,
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5u8, 1u8, 4u8, 5u8, 5u8, 1u8, 9u8, 1u8, 5u8, 2u8, 2u8, 8u8, 3u8, 6u8, 6u8, 8u8, 5u8, 1u8, 8u8, 0u8, 6u8, 6u8, 4u8, 0u8,
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6u8, 2u8, 5u8, 7u8, 2u8, 7u8, 5u8, 9u8, 5u8, 7u8, 6u8, 1u8, 4u8, 1u8, 8u8, 3u8, 4u8, 2u8, 5u8, 9u8, 0u8, 3u8, 3u8, 2u8,
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0u8, 3u8, 1u8, 2u8, 5u8, 3u8, 6u8, 3u8, 7u8, 9u8, 7u8, 8u8, 8u8, 0u8, 7u8, 0u8, 9u8, 1u8, 7u8, 1u8, 2u8, 9u8, 5u8, 1u8,
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6u8, 6u8, 0u8, 1u8, 5u8, 6u8, 2u8, 5u8, 1u8, 8u8, 1u8, 8u8, 9u8, 8u8, 9u8, 4u8, 0u8, 3u8, 5u8, 4u8, 5u8, 8u8, 5u8, 6u8,
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4u8, 7u8, 5u8, 8u8, 3u8, 0u8, 0u8, 7u8, 8u8, 1u8, 2u8, 5u8, 9u8, 0u8, 9u8, 4u8, 9u8, 4u8, 7u8, 0u8, 1u8, 7u8, 7u8, 2u8,
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9u8, 2u8, 8u8, 2u8, 3u8, 7u8, 9u8, 1u8, 5u8, 0u8, 3u8, 9u8, 0u8, 6u8, 2u8, 5u8, 4u8, 5u8, 4u8, 7u8, 4u8, 7u8, 3u8, 5u8,
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0u8, 8u8, 8u8, 6u8, 4u8, 6u8, 4u8, 1u8, 1u8, 8u8, 9u8, 5u8, 7u8, 5u8, 1u8, 9u8, 5u8, 3u8, 1u8, 2u8, 5u8, 2u8, 2u8, 7u8,
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3u8, 7u8, 3u8, 6u8, 7u8, 5u8, 4u8, 4u8, 3u8, 2u8, 3u8, 2u8, 0u8, 5u8, 9u8, 4u8, 7u8, 8u8, 7u8, 5u8, 9u8, 7u8, 6u8, 5u8,
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6u8, 2u8, 5u8, 1u8, 1u8, 3u8, 6u8, 8u8, 6u8, 8u8, 3u8, 7u8, 7u8, 2u8, 1u8, 6u8, 1u8, 6u8, 0u8, 2u8, 9u8, 7u8, 3u8, 9u8,
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3u8, 7u8, 9u8, 8u8, 8u8, 2u8, 8u8, 1u8, 2u8, 5u8, 5u8, 6u8, 8u8, 4u8, 3u8, 4u8, 1u8, 8u8, 8u8, 6u8, 0u8, 8u8, 0u8, 8u8,
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0u8, 1u8, 4u8, 8u8, 6u8, 9u8, 6u8, 8u8, 9u8, 9u8, 4u8, 1u8, 4u8, 0u8, 6u8, 2u8, 5u8, 2u8, 8u8, 4u8, 2u8, 1u8, 7u8, 0u8,
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9u8, 4u8, 3u8, 0u8, 4u8, 0u8, 4u8, 0u8, 0u8, 7u8, 4u8, 3u8, 4u8, 8u8, 4u8, 4u8, 9u8, 7u8, 0u8, 7u8, 0u8, 3u8, 1u8, 2u8,
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5u8, 1u8, 4u8, 2u8, 1u8, 0u8, 8u8, 5u8, 4u8, 7u8, 1u8, 5u8, 2u8, 0u8, 2u8, 0u8, 0u8, 3u8, 7u8, 1u8, 7u8, 4u8, 2u8, 2u8,
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4u8, 8u8, 5u8, 3u8, 5u8, 1u8, 5u8, 6u8, 2u8, 5u8, 7u8, 1u8, 0u8, 5u8, 4u8, 2u8, 7u8, 3u8, 5u8, 7u8, 6u8, 0u8, 1u8, 0u8,
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0u8, 1u8, 8u8, 5u8, 8u8, 7u8, 1u8, 1u8, 2u8, 4u8, 2u8, 6u8, 7u8, 5u8, 7u8, 8u8, 1u8, 2u8, 5u8, 3u8, 5u8, 5u8, 2u8, 7u8,
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1u8, 3u8, 6u8, 7u8, 8u8, 8u8, 0u8, 0u8, 5u8, 0u8, 0u8, 9u8, 2u8, 9u8, 3u8, 5u8, 5u8, 6u8, 2u8, 1u8, 3u8, 3u8, 7u8, 8u8,
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9u8, 0u8, 6u8, 2u8, 5u8, 1u8, 7u8, 7u8, 6u8, 3u8, 5u8, 6u8, 8u8, 3u8, 9u8, 4u8, 0u8, 0u8, 2u8, 5u8, 0u8, 4u8, 6u8, 4u8,
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6u8, 7u8, 7u8, 8u8, 1u8, 0u8, 6u8, 6u8, 8u8, 9u8, 4u8, 5u8, 3u8, 1u8, 2u8, 5u8, 8u8, 8u8, 8u8, 1u8, 7u8, 8u8, 4u8, 1u8,
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9u8, 7u8, 0u8, 0u8, 1u8, 2u8, 5u8, 2u8, 3u8, 2u8, 3u8, 3u8, 8u8, 9u8, 0u8, 5u8, 3u8, 3u8, 4u8, 4u8, 7u8, 2u8, 6u8, 5u8,
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6u8, 2u8, 5u8, 4u8, 4u8, 4u8, 0u8, 8u8, 9u8, 2u8, 0u8, 9u8, 8u8, 5u8, 0u8, 0u8, 6u8, 2u8, 6u8, 1u8, 6u8, 1u8, 6u8, 9u8,
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4u8, 5u8, 2u8, 6u8, 6u8, 7u8, 2u8, 3u8, 6u8, 3u8, 2u8, 8u8, 1u8, 2u8, 5u8, 2u8, 2u8, 2u8, 0u8, 4u8, 4u8, 6u8, 0u8, 4u8,
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9u8, 2u8, 5u8, 0u8, 3u8, 1u8, 3u8, 0u8, 8u8, 0u8, 8u8, 4u8, 7u8, 2u8, 6u8, 3u8, 3u8, 3u8, 6u8, 1u8, 8u8, 1u8, 6u8, 4u8,
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0u8, 6u8, 2u8, 5u8, 1u8, 1u8, 1u8, 0u8, 2u8, 2u8, 3u8, 0u8, 2u8, 4u8, 6u8, 2u8, 5u8, 1u8, 5u8, 6u8, 5u8, 4u8, 0u8, 4u8,
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2u8, 3u8, 6u8, 3u8, 1u8, 6u8, 6u8, 8u8, 0u8, 9u8, 0u8, 8u8, 2u8, 0u8, 3u8, 1u8, 2u8, 5u8, 5u8, 5u8, 5u8, 1u8, 1u8, 1u8,
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5u8, 1u8, 2u8, 3u8, 1u8, 2u8, 5u8, 7u8, 8u8, 2u8, 7u8, 0u8, 2u8, 1u8, 1u8, 8u8, 1u8, 5u8, 8u8, 3u8, 4u8, 0u8, 4u8, 5u8,
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4u8, 1u8, 0u8, 1u8, 5u8, 6u8, 2u8, 5u8, 2u8, 7u8, 7u8, 5u8, 5u8, 5u8, 7u8, 5u8, 6u8, 1u8, 5u8, 6u8, 2u8, 8u8, 9u8, 1u8,
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3u8, 5u8, 1u8, 0u8, 5u8, 9u8, 0u8, 7u8, 9u8, 1u8, 7u8, 0u8, 2u8, 2u8, 7u8, 0u8, 5u8, 0u8, 7u8, 8u8, 1u8, 2u8, 5u8, 1u8,
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3u8, 8u8, 7u8, 7u8, 7u8, 8u8, 7u8, 8u8, 0u8, 7u8, 8u8, 1u8, 4u8, 4u8, 5u8, 6u8, 7u8, 5u8, 5u8, 2u8, 9u8, 5u8, 3u8, 9u8,
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5u8, 8u8, 5u8, 1u8, 1u8, 3u8, 5u8, 2u8, 5u8, 3u8, 9u8, 0u8, 6u8, 2u8, 5u8, 6u8, 9u8, 3u8, 8u8, 8u8, 9u8, 3u8, 9u8, 0u8,
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3u8, 9u8, 0u8, 7u8, 2u8, 2u8, 8u8, 3u8, 7u8, 7u8, 6u8, 4u8, 7u8, 6u8, 9u8, 7u8, 9u8, 2u8, 5u8, 5u8, 6u8, 7u8, 6u8, 2u8,
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6u8, 9u8, 5u8, 3u8, 1u8, 2u8, 5u8, 3u8, 4u8, 6u8, 9u8, 4u8, 4u8, 6u8, 9u8, 5u8, 1u8, 9u8, 5u8, 3u8, 6u8, 1u8, 4u8, 1u8,
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8u8, 8u8, 8u8, 2u8, 3u8, 8u8, 4u8, 8u8, 9u8, 6u8, 2u8, 7u8, 8u8, 3u8, 8u8, 1u8, 3u8, 4u8, 7u8, 6u8, 5u8, 6u8, 2u8, 5u8,
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1u8, 7u8, 3u8, 4u8, 7u8, 2u8, 3u8, 4u8, 7u8, 5u8, 9u8, 7u8, 6u8, 8u8, 0u8, 7u8, 0u8, 9u8, 4u8, 4u8, 1u8, 1u8, 9u8, 2u8,
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4u8, 4u8, 8u8, 1u8, 3u8, 9u8, 1u8, 9u8, 0u8, 6u8, 7u8, 3u8, 8u8, 2u8, 8u8, 1u8, 2u8, 5u8, 8u8, 6u8, 7u8, 3u8, 6u8, 1u8,
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7u8, 3u8, 7u8, 9u8, 8u8, 8u8, 4u8, 0u8, 3u8, 5u8, 4u8, 7u8, 2u8, 0u8, 5u8, 9u8, 6u8, 2u8, 2u8, 4u8, 0u8, 6u8, 9u8, 5u8,
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9u8, 5u8, 3u8, 3u8, 6u8, 9u8, 1u8, 4u8, 0u8, 6u8, 2u8, 5u8,
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];
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