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lib/strconv: decimal arbitrary-precision arithmetic (#106 fold-3)

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Port ref/hare/strconv/decimal.ha (~202 LOC Hare) → 314 LOC
lib/strconv/decimal.ww — decimal struct + 11 fns (trim,
decimal_shift, leftshift, leftshift_newdigits, rightshift, round,
decimal_round, helpers). 1:1 mechanical Hare-fidelity with 8
documented spelling-divergences. Shared engine for stof (fold-4) +
ftos (fold-5). Built atop 5 wwstage cgen prereqs
(#131/#133-expanded/#134/#135/#138) that closed gate-blind silent
miscompiles surfaced by the port. Test 922_decimal_run +
lib/strconv/test/decimaltest.ww (6 @test fns covering all 11 impl
fns).
This commit is contained in:
Hojun-Cho
2026-05-27 00:44:16 +09:00
parent d960971c6e
commit 07e57ff9a6
7 changed files with 1535 additions and 2 deletions
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9
Makefile
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@@ -113,7 +113,7 @@ $(BIN)/wwdump_ww: selfhost/cmd/wwdump/main.ww \
selfhost/cmd/wcc/cgen.ww selfhost/cmd/wcc/cgenexpr.ww \
selfhost/cmd/wcc/cgenstmt.ww selfhost/cmd/wcc/cgenutil.ww \
selfhost/cmd/wcc/cgendecl.ww \
lib/os/os.ww lib/rt/malloc.ww lib/time/time.ww lib/strconv/strconv.ww lib/strconv/stof_data.ww lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww lib/ascii/ascii.ww lib/io/io.ww lib/memio/memio.ww lib/fmt/fmt.ww \
lib/os/os.ww lib/rt/malloc.ww lib/time/time.ww lib/strconv/strconv.ww lib/strconv/stof_data.ww lib/strconv/decimal.ww lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww lib/ascii/ascii.ww lib/io/io.ww lib/memio/memio.ww lib/fmt/fmt.ww \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(LIB)/libwwrt.a | $(BIN)
@mkdir -p $(BIN)/wwdump_ww.d
@@ -135,7 +135,7 @@ $(BIN)/w6c_ww: selfhost/cmd/w6c/main.ww \
selfhost/cmd/wcc/cgen.ww selfhost/cmd/wcc/cgenexpr.ww \
selfhost/cmd/wcc/cgenstmt.ww selfhost/cmd/wcc/cgenutil.ww \
selfhost/cmd/wcc/cgendecl.ww \
lib/os/os.ww lib/rt/malloc.ww lib/time/time.ww lib/strconv/strconv.ww lib/strconv/stof_data.ww lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww lib/ascii/ascii.ww lib/io/io.ww lib/memio/memio.ww lib/fmt/fmt.ww \
lib/os/os.ww lib/rt/malloc.ww lib/time/time.ww lib/strconv/strconv.ww lib/strconv/stof_data.ww lib/strconv/decimal.ww lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww lib/ascii/ascii.ww lib/io/io.ww lib/memio/memio.ww lib/fmt/fmt.ww \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(LIB)/libwwrt.a | $(BIN)
@mkdir -p $(BIN)/w6c_ww.d
@@ -322,6 +322,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_intdiv_signed \
$(BIN)/test_strings_run \
$(BIN)/test_hex_run $(BIN)/test_utf8_run $(BIN)/test_bytes_run \
$(BIN)/test_decimal_run \
$(BIN)/test_memio_run $(BIN)/test_temp_run $(BIN)/test_getopt_run \
$(BIN)/test_base32_run $(BIN)/test_base64_run \
$(BIN)/test_adler32_run $(BIN)/test_crc16_run \
@@ -1031,6 +1032,10 @@ $(BIN)/test_bytes_run: test/wcc/967_bytes_run.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_decimal_run: test/wcc/922_decimal_run.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_strings_run: test/wcc/966_strings_run.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<