checkpoint: season-wide bug fix campaign + infra
Cumulative season's silent-bug hunting (~62 fixes) across the FiveSql2 SQL engine, the Five compiler/runtime, and the hbrdd RDD layer. Saved as a single checkpoint before refactoring the parser to delegate xBase command translation to the preprocessor. Highlights: FiveSql2 engine (_FiveSql2/src/) - prefix-glob index attach -> explicit convention (<table>_pk.ntx, <table>_uq.ntx, <table>.cdx) — fixes silent multi-row INSERT row-drop - DROP/CREATE TABLE FErase chain extended (.cdx, .fsc, .fsv, .dbt, .fpt) - COUNT(DISTINCT col) parsed + aggregated via hSeen hash - UNION column-count mismatch returns SQL_ERR_GRAMMAR (was silent) - DISTINCT + ORDER BY hidden-col leak fixed (trim before DISTINCT) - Derived table FROM (SELECT...) + JOIN right-side derived - Self-FK CASCADE depth 2+ via SqlGetSingleColPK pre-collect - LAG/LEAD default arg uses SqlEvalRowExpr (handles -N const exprs) - DATE literal round-trip validation (Feb 29 non-leap rejected) - CREATE OR REPLACE VIEW; CREATE VIEW errors on already-exists - AlterTable type dispatcher comma-wrapped (1-char type "A" no longer matches CHARACTER) Compiler / runtime - gengo: HB_ -> FV_ prefix on emitted Go function names (Five identity) - gengo split: emit_block.go, emit_stmt.go, folding.go extracted - parser/stmtreg.go nudges - hbrt: debug TUI/CLI restructure (debugcmd, debugkey, termios_*), windows debug stubs collapsed - thread/vm/value/class/pcinterp tightening from panic traces RDD layer (hbrdd/) - dbf: null bitmap support (null.go + null_test.go), mmap split (mmap_posix.go / mmap_windows.go), byte-level numeric parse - ntx/cdx: windows mmap parity - workarea + mem RDD: cross-area state-bleed fixes RTL (hbrtl/) - errorlog rewrite with platform-specific FD (errorlog_fd_unix / errorlog_fd_other) - sqlscan, sqlhelpers, indexrtl, datetime extensions Gates green at checkpoint: - go test ./... : PASS - FiveSql2 SQL:1999 : 43/43 - Harbour compat : 56/56 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
111
hbrdd/cdx/cdx.go
111
hbrdd/cdx/cdx.go
@@ -150,12 +150,28 @@ type DecodedKey struct {
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Key []byte
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}
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// DecodeLeafKeys extracts all keys from a CDX leaf page.
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// Ported from rddfive/cdx_engine.c cdx_leaf_decode_all() — byte-level decode.
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// 10x+ faster than bit-by-bit extractBits loop.
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// DecodeLeafKeys extracts all keys from a CDX leaf page — convenience
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// wrapper that allocates fresh buffers. Hot call sites (per-tag seek
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// loops) should use DecodeLeafKeysInto to recycle storage.
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func DecodeLeafKeys(data []byte, hdr LeafHeader, keyLen int) []DecodedKey {
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keys, _ := DecodeLeafKeysInto(data, hdr, keyLen, nil, nil)
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return keys
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}
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// DecodeLeafKeysInto is the allocation-aware variant. `slabReuse` and
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// `keysReuse` are previous buffers (may be nil on first call, or carry
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// stale data from a prior decode). Returns fresh `keys` and the backing
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// `slab` — both valid until the next call that reuses them. Ported
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// from rddfive/cdx_engine.c cdx_leaf_decode_all() — byte-level decode,
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// 10× faster than bit-by-bit extractBits loop.
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//
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// Reuse contract: caller must not retain pointers into an earlier
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// slab after passing it here. CDX.Tag's page cache already observes
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// this invariant because it overwrites cachedLeafKeys on miss.
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func DecodeLeafKeysInto(data []byte, hdr LeafHeader, keyLen int,
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slabReuse []byte, keysReuse []DecodedKey) ([]DecodedKey, []byte) {
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if hdr.NKeys == 0 {
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return nil
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return nil, slabReuse
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}
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nKeys := int(hdr.NKeys)
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@@ -167,9 +183,22 @@ func DecodeLeafKeys(data []byte, hdr LeafHeader, keyLen int) []DecodedKey {
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dcMask := uint32((1 << uint(dupBits)) - 1)
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tcMask := uint32((1 << uint(trlBits)) - 1)
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// Slab allocation: one alloc for all keys (avoids 30+ allocations per page)
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keys := make([]DecodedKey, nKeys)
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slab := make([]byte, nKeys*keyLen+keyLen) // +keyLen for prevKey
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// Reuse or grow the DecodedKey slice.
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var keys []DecodedKey
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if cap(keysReuse) >= nKeys {
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keys = keysReuse[:nKeys]
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} else {
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keys = make([]DecodedKey, nKeys)
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}
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// Reuse or grow the byte slab (one alloc replaces 30+ per page).
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needBytes := nKeys*keyLen + keyLen // +keyLen for prevKey
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var slab []byte
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if cap(slabReuse) >= needBytes {
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slab = slabReuse[:needBytes]
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} else {
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slab = make([]byte, needBytes)
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}
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prevKey := slab[nKeys*keyLen:]
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for j := range prevKey {
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prevKey[j] = ' '
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@@ -214,7 +243,7 @@ func DecodeLeafKeys(data []byte, hdr LeafHeader, keyLen int) []DecodedKey {
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copy(prevKey, key)
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}
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return keys
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return keys, slab
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}
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// extractBits extracts n bits from a byte array starting at bit offset.
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@@ -308,6 +337,8 @@ type Index struct {
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}
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// readAt reads len(buf) bytes at offset — from mmap or file fallback.
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// Prefer pageSlice() on hot paths; this entry point stays for callers
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// that need a writable, caller-owned copy.
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func (idx *Index) readAt(buf []byte, offset int64) error {
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if idx.mmapData != nil && offset >= 0 && int(offset)+len(buf) <= len(idx.mmapData) {
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copy(buf, idx.mmapData[offset:offset+int64(len(buf))])
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@@ -317,6 +348,27 @@ func (idx *Index) readAt(buf []byte, offset int64) error {
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return err
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}
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// pageSlice returns a read-only view of one B-tree page at offset — a
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// direct slice of mmap when possible (zero copy), else a read into the
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// caller's fallback buffer. Returns nil on read error. The returned
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// slice is valid until the index is remapped, closed, or until the
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// next fallbackBuf reuse — callers must not retain it across those
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// events. The seek loop uses this: same Tag.seekBuf gets handed back
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// for every internal-node visit, so the non-mmap path allocates once,
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// and the mmap path allocates nothing.
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func (idx *Index) pageSlice(offset int64, fallbackBuf []byte) []byte {
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if idx.mmapData != nil && offset >= 0 && int(offset)+PageLen <= len(idx.mmapData) {
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return idx.mmapData[offset : offset+PageLen]
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}
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if len(fallbackBuf) < PageLen {
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fallbackBuf = make([]byte, PageLen)
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}
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if _, err := idx.file.ReadAt(fallbackBuf[:PageLen], offset); err != nil {
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return nil
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}
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return fallbackBuf[:PageLen]
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}
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// Tag represents one index tag within a CDX file.
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type Tag struct {
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Name string // tag name (e.g., "BYNAME")
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@@ -336,6 +388,19 @@ type Tag struct {
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// Leaf page decode cache — avoids re-decoding same page on SkipNext/SkipPrev
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cachedLeafOff int64
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cachedLeafKeys []DecodedKey
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// Reusable backing storage for the key slab and DecodedKey slice.
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// cachedLeafKeys[i].Key aliases slices of cachedLeafSlab, so the
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// slab stays alive as long as cachedLeafKeys is in use. On cache
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// miss we hand both buffers back to DecodeLeafKeysInto which
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// reuses them if big enough — saving one alloc per leaf decode.
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cachedLeafSlab []byte
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// seekBuf is handed to Index.pageSlice as the fallback when mmap
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// isn't available (Windows, or file grown past mapped size). The
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// mmap path ignores it and returns a slice directly into mapped
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// memory — zero copy. Either way, allocating a single 512-byte
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// buffer per Tag (not per Seek) eliminates the per-seek alloc.
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seekBuf []byte
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}
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type StackEntry struct {
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@@ -583,7 +648,10 @@ func decodeCompoundLeaf(data []byte, nKeys int) []tagDirEntry {
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return entries
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}
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// getLeafKeys returns decoded leaf keys with caching.
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// getLeafKeys returns decoded leaf keys with caching. On cache miss the
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// previous slab + key slice are recycled into DecodeLeafKeysInto so we
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// avoid a fresh alloc for every leaf traversed during a seek-heavy
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// workload (which is the whole point of caching them per-Tag).
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func (t *Tag) getLeafKeys(pageOffset int64) ([]DecodedKey, error) {
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if pageOffset == t.cachedLeafOff && t.cachedLeafKeys != nil {
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return t.cachedLeafKeys, nil
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@@ -593,9 +661,10 @@ func (t *Tag) getLeafKeys(pageOffset int64) ([]DecodedKey, error) {
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return nil, err
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}
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hdr := DecodeLeafHeader(buf)
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keys := DecodeLeafKeys(buf, hdr, t.keyLen)
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keys, slab := DecodeLeafKeysInto(buf, hdr, t.keyLen, t.cachedLeafSlab, t.cachedLeafKeys)
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t.cachedLeafOff = pageOffset
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t.cachedLeafKeys = keys
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t.cachedLeafSlab = slab
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return keys, nil
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}
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@@ -609,12 +678,18 @@ func (t *Tag) Seek(searchKey []byte) (uint32, bool) {
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t.tagEOF = false
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pageOffset := int64(t.header.RootPtr)
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buf := make([]byte, PageLen) // single buffer reused across all levels
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// Reuse seekBuf across seeks so the non-mmap fallback path only
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// allocates once per Tag lifetime. With mmap, pageSlice returns a
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// view directly into mapped memory and seekBuf stays unused.
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if cap(t.seekBuf) < PageLen {
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t.seekBuf = make([]byte, PageLen)
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}
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entrySize := t.keyLen + 8
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searchLen := len(searchKey)
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for {
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if err := t.index.readAt(buf, pageOffset); err != nil {
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buf := t.index.pageSlice(pageOffset, t.seekBuf)
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if buf == nil {
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t.tagEOF = true
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return 0, false
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}
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@@ -627,9 +702,11 @@ func (t *Tag) Seek(searchKey []byte) (uint32, bool) {
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keys = t.cachedLeafKeys
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} else {
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hdr := DecodeLeafHeader(buf)
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keys = DecodeLeafKeys(buf, hdr, t.keyLen)
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var slab []byte
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keys, slab = DecodeLeafKeysInto(buf, hdr, t.keyLen, t.cachedLeafSlab, t.cachedLeafKeys)
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t.cachedLeafOff = pageOffset
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t.cachedLeafKeys = keys
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t.cachedLeafSlab = slab
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}
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// Binary search — leftmost match
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@@ -746,9 +823,10 @@ func (t *Tag) goLeftmost(pageOffset int64) bool {
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if isLeaf {
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hdr := DecodeLeafHeader(buf)
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keys := DecodeLeafKeys(buf, hdr, t.keyLen)
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keys, slab := DecodeLeafKeysInto(buf, hdr, t.keyLen, t.cachedLeafSlab, t.cachedLeafKeys)
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t.cachedLeafOff = pageOffset
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t.cachedLeafKeys = keys
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t.cachedLeafSlab = slab
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if len(keys) > 0 {
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t.curRecNo = keys[0].RecNo
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copy(t.curKey, keys[0].Key)
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@@ -794,7 +872,10 @@ func (t *Tag) goRightmost(pageOffset int64) bool {
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if isLeaf {
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hdr := DecodeLeafHeader(buf)
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keys := DecodeLeafKeys(buf, hdr, t.keyLen)
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keys, slab := DecodeLeafKeysInto(buf, hdr, t.keyLen, t.cachedLeafSlab, t.cachedLeafKeys)
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t.cachedLeafOff = pageOffset
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t.cachedLeafKeys = keys
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t.cachedLeafSlab = slab
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if len(keys) > 0 {
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last := len(keys) - 1
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t.curRecNo = keys[last].RecNo
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@@ -1,17 +1,82 @@
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//go:build windows
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// Windows mmap — see hbrdd/ntx/mmap_windows.go for the commentary; this
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// is the same implementation for the CDX index package. Keeping
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// separate copies (instead of a shared helper) because the registry
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// map is private to each package, avoiding cross-package coupling for
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// what is otherwise 50 lines of stdlib-only code.
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package cdx
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import (
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"errors"
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"fmt"
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"os"
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"sync"
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"syscall"
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"unsafe"
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)
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const (
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pageReadonly = 0x02
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fileMapRead = 0x0004
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)
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var (
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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procCreateFileMappingW = kernel32.NewProc("CreateFileMappingW")
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procMapViewOfFile = kernel32.NewProc("MapViewOfFile")
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procUnmapViewOfFile = kernel32.NewProc("UnmapViewOfFile")
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procCloseHandle = kernel32.NewProc("CloseHandle")
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mappingMu sync.Mutex
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mappings = map[uintptr]syscall.Handle{}
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)
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// Windows: mmap not implemented — fallback to read() path.
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func mmapFile(f *os.File, size int) ([]byte, error) {
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return nil, errors.New("mmap not supported on Windows")
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if size <= 0 {
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return nil, fmt.Errorf("mmap: non-positive size %d", size)
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}
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hFile := syscall.Handle(f.Fd())
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sizeHigh := uint32(uint64(size) >> 32)
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sizeLow := uint32(uint64(size) & 0xFFFFFFFF)
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hMap, _, err := procCreateFileMappingW.Call(
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uintptr(hFile), 0, pageReadonly,
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uintptr(sizeHigh), uintptr(sizeLow), 0,
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)
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if hMap == 0 {
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return nil, fmt.Errorf("CreateFileMapping: %v", err)
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}
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addr, _, err := procMapViewOfFile.Call(
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hMap, fileMapRead, 0, 0, uintptr(size),
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)
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if addr == 0 {
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procCloseHandle.Call(hMap)
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return nil, fmt.Errorf("MapViewOfFile: %v", err)
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}
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data := unsafe.Slice((*byte)(unsafe.Pointer(addr)), size)
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mappingMu.Lock()
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mappings[addr] = syscall.Handle(hMap)
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mappingMu.Unlock()
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return data, nil
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}
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func munmapFile(data []byte) error {
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if len(data) == 0 {
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return nil
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}
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addr := uintptr(unsafe.Pointer(&data[0]))
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mappingMu.Lock()
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hMap, ok := mappings[addr]
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delete(mappings, addr)
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mappingMu.Unlock()
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r, _, err := procUnmapViewOfFile.Call(addr)
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if r == 0 {
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return fmt.Errorf("UnmapViewOfFile: %v", err)
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}
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if ok {
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procCloseHandle.Call(uintptr(hMap))
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}
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return nil
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}
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@@ -18,7 +18,6 @@ import (
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"fmt"
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"os"
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"strings"
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"syscall"
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)
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|
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// DBFArea implements the DBF database driver.
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@@ -76,6 +75,14 @@ type DBFArea struct {
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// Built lazily on first FieldPosCache() call.
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// SQLite: "column affinity binding" — O(1) vs O(n) linear scan.
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fieldPosMap map[string]int
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|
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// SQL NULL bitmap (VFP/Harbour _NullFlags convention).
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// nullFieldsIdx: descriptor index of the hidden _NullFlags field,
|
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// or -1 if the table has no nullable columns.
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// nullBitOf: user-field descriptor index → bit position within
|
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// the _NullFlags byte range.
|
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nullFieldsIdx int
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nullBitOf map[int]int
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}
|
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|
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// DBFDriver is the driver factory for DBF files.
|
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@@ -216,18 +223,25 @@ func openDBF(drv *DBFDriver, params hbrdd.OpenParams) (*DBFArea, error) {
|
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area.recCount = hdr.RecCount
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}
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|
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// Step 7: Build FieldInfo for BaseArea
|
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fieldInfos := make([]hbrdd.FieldInfo, fieldCount)
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for i, fd := range fields {
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fieldInfos[i] = hbrdd.FieldInfo{
|
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// Step 7: Build FieldInfo for BaseArea. System fields (notably
|
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// the hidden _NullFlags column carrying the SQL NULL bitmap) are
|
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// held in fieldDescs for storage but filtered out of the public
|
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// FieldInfo slice — user-visible counts stay stable.
|
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fieldInfos := make([]hbrdd.FieldInfo, 0, fieldCount)
|
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for _, fd := range fields {
|
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if fd.Flags&FieldFlagSystem != 0 {
|
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continue
|
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}
|
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fieldInfos = append(fieldInfos, hbrdd.FieldInfo{
|
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Name: fd.GetName(),
|
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Type: fd.Type,
|
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Len: int(fd.Len),
|
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Dec: int(fd.Dec),
|
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Flags: fd.Flags,
|
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}
|
||||
})
|
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}
|
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area.InitFields(fieldInfos)
|
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area.buildNullIndex()
|
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|
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// Step 8: Auto-open FPT if memo fields exist
|
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if hasMemoField(fields) {
|
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@@ -264,14 +278,22 @@ func createDBF(drv *DBFDriver, params hbrdd.CreateParams) (*DBFArea, error) {
|
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|
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// Build field descriptors
|
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fieldDescs := make([]FieldDesc, len(params.Fields))
|
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recordLen := uint16(1) // deletion flag
|
||||
for i, fi := range params.Fields {
|
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fieldDescs[i].SetName(fi.Name)
|
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fieldDescs[i].Type = fi.Type
|
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fieldDescs[i].Len = byte(fi.Len)
|
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fieldDescs[i].Dec = byte(fi.Dec)
|
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fieldDescs[i].Flags = fi.Flags
|
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recordLen += uint16(fi.Len)
|
||||
}
|
||||
|
||||
// If any user field is nullable, append the hidden _NullFlags
|
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// system column. Must happen before recordLen is tallied so its
|
||||
// bytes reserve space in the record layout.
|
||||
fieldDescs = appendNullFlagsField(fieldDescs)
|
||||
|
||||
recordLen := uint16(1) // deletion flag
|
||||
for i := range fieldDescs {
|
||||
recordLen += uint16(fieldDescs[i].Len)
|
||||
}
|
||||
|
||||
// Build header
|
||||
@@ -324,6 +346,7 @@ func createDBF(drv *DBFDriver, params hbrdd.CreateParams) (*DBFArea, error) {
|
||||
fieldInfos := make([]hbrdd.FieldInfo, len(params.Fields))
|
||||
copy(fieldInfos, params.Fields)
|
||||
area.InitFields(fieldInfos)
|
||||
area.buildNullIndex()
|
||||
area.FEof = true
|
||||
|
||||
// Auto-create FPT if memo fields exist
|
||||
@@ -588,7 +611,6 @@ func (a *DBFArea) Skip(count int64) error {
|
||||
}
|
||||
newRec := a.recNo + 1
|
||||
if newRec > a.recCount {
|
||||
// Flush dirty record before entering EOF phantom
|
||||
if a.dirty {
|
||||
a.flushRecord()
|
||||
}
|
||||
@@ -599,7 +621,6 @@ func (a *DBFArea) Skip(count int64) error {
|
||||
if err := a.GoTo(newRec); err != nil {
|
||||
return err
|
||||
}
|
||||
// Skip deleted records when SET DELETED ON
|
||||
if err := a.skipFilter(1); err != nil {
|
||||
return err
|
||||
}
|
||||
@@ -622,27 +643,10 @@ func (a *DBFArea) Skip(count int64) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// mmapDBF maps the DBF file for zero-copy reads. Called after open.
|
||||
func (a *DBFArea) mmapDBF() {
|
||||
fi, err := a.dataFile.Stat()
|
||||
if err != nil || fi.Size() < int64(a.header.HeaderLen) {
|
||||
return
|
||||
}
|
||||
data, err := syscall.Mmap(int(a.dataFile.Fd()), 0, int(fi.Size()),
|
||||
syscall.PROT_READ, syscall.MAP_SHARED)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
a.mmapData = data
|
||||
}
|
||||
|
||||
// unmapDBF releases the mmap.
|
||||
func (a *DBFArea) unmapDBF() {
|
||||
if a.mmapData != nil {
|
||||
syscall.Munmap(a.mmapData)
|
||||
a.mmapData = nil
|
||||
}
|
||||
}
|
||||
// mmapDBF / unmapDBF live in mmap_posix.go (Linux/Darwin, syscall.Mmap)
|
||||
// and mmap_windows.go (CreateFileMapping / MapViewOfFile). Keeping the
|
||||
// platform-specific ioctl-ish calls out of this file lets cross-builds
|
||||
// stay clean.
|
||||
|
||||
// loadRecord reads the current record — from mmap or file fallback.
|
||||
func (a *DBFArea) loadRecord() {
|
||||
@@ -664,6 +668,12 @@ func (a *DBFArea) GetValue(fieldIndex int) (hbrt.Value, error) {
|
||||
if a.FEof {
|
||||
return hbrt.MakeNil(), nil
|
||||
}
|
||||
// SQL NULL: nullable fields check the hidden _NullFlags bitmap
|
||||
// first; a set bit means the raw bytes carry no meaningful value
|
||||
// and the reader should surface NIL to the caller.
|
||||
if a.isFieldNull(fieldIndex) {
|
||||
return hbrt.MakeNil(), nil
|
||||
}
|
||||
fd := &a.fieldDescs[fieldIndex]
|
||||
// MEMO field: read from FPT and return string
|
||||
if (fd.Type == 'M' || fd.Type == 'm') && a.memoFile != nil {
|
||||
@@ -695,6 +705,18 @@ func (a *DBFArea) PutValue(fieldIndex int, val hbrt.Value) error {
|
||||
if fieldIndex < 0 || fieldIndex >= len(a.fieldDescs) {
|
||||
return fmt.Errorf("field index out of range: %d", fieldIndex)
|
||||
}
|
||||
// SQL NULL handling for nullable fields: a NIL write sets the
|
||||
// bitmap bit and leaves the raw bytes alone (readers will short-
|
||||
// circuit via isFieldNull before reaching the type codec). A
|
||||
// non-NIL write clears the bit so the raw value surfaces again.
|
||||
if _, nullable := a.nullBitOf[fieldIndex]; nullable {
|
||||
if val.IsNil() {
|
||||
a.setFieldNull(fieldIndex, true)
|
||||
a.dirty = true
|
||||
return nil
|
||||
}
|
||||
a.setFieldNull(fieldIndex, false)
|
||||
}
|
||||
fd := &a.fieldDescs[fieldIndex]
|
||||
// MEMO field: write string to FPT, store block number in DBF
|
||||
if (fd.Type == 'M' || fd.Type == 'm') && a.memoFile != nil && val.IsString() {
|
||||
|
||||
@@ -20,10 +20,26 @@ import (
|
||||
// GetFieldValue converts raw record bytes to a Five Value.
|
||||
// Harbour: hb_dbfGetValue in dbf1.c
|
||||
func GetFieldValue(recBuf []byte, offset uint16, field *FieldDesc) hbrt.Value {
|
||||
return getFieldValueImpl(recBuf, offset, field, false)
|
||||
}
|
||||
|
||||
// getFieldValueImpl is the zero-copy-aware variant. When stable=true the
|
||||
// caller guarantees the recBuf bytes won't be mutated, freed, or
|
||||
// unmapped for the Value's lifetime — then CHAR fields alias the
|
||||
// buffer and skip the `string([]byte)` copy.
|
||||
//
|
||||
// NOTE: currently unexported because naive usage (even with mmap-backed
|
||||
// buffers) can produce UAF when FiveSql2 closes/packs temp CTE tables
|
||||
// while CHAR values from earlier iterations are still referenced. The
|
||||
// machinery is kept for a future refcounted mmap lifetime scheme.
|
||||
func getFieldValueImpl(recBuf []byte, offset uint16, field *FieldDesc, stable bool) hbrt.Value {
|
||||
raw := recBuf[offset : offset+uint16(field.Len)]
|
||||
|
||||
switch field.Type {
|
||||
case 'C', 'c': // Character
|
||||
if stable {
|
||||
return hbrt.MakeStringBytes(raw)
|
||||
}
|
||||
return hbrt.MakeString(string(raw))
|
||||
|
||||
case 'N', 'n': // Numeric (ASCII)
|
||||
@@ -360,11 +376,22 @@ func parseMemoRef(raw []byte, fieldLen byte) hbrt.Value {
|
||||
return hbrt.MakeLong(int64(blockNo))
|
||||
}
|
||||
if fieldLen == 10 {
|
||||
s := strings.TrimSpace(string(raw))
|
||||
if s == "" {
|
||||
return hbrt.MakeLong(0)
|
||||
// Inline byte-level parse: same pattern as parseNumericField.
|
||||
// Avoids string(raw) + strings.TrimSpace + strconv.ParseInt
|
||||
// — roughly 3× faster and allocation-free.
|
||||
var n int64
|
||||
for _, c := range raw {
|
||||
switch {
|
||||
case c == ' ':
|
||||
// Leading/trailing space — keep current accumulator
|
||||
case c >= '0' && c <= '9':
|
||||
n = n*10 + int64(c-'0')
|
||||
default:
|
||||
// Malformed block ref — treat as 0, same as strconv.ParseInt
|
||||
// would on the non-digit prefix.
|
||||
return hbrt.MakeLong(0)
|
||||
}
|
||||
}
|
||||
n, _ := strconv.ParseInt(s, 10, 64)
|
||||
return hbrt.MakeLong(n)
|
||||
}
|
||||
return hbrt.MakeLong(0)
|
||||
@@ -395,10 +422,23 @@ func parseIntegerField(raw []byte, fieldLen byte) hbrt.Value {
|
||||
|
||||
func formatNumericField(raw []byte, fieldLen, dec byte, val hbrt.Value) {
|
||||
d := val.AsNumDouble()
|
||||
format := "%" + strconv.Itoa(int(fieldLen)) + "." + strconv.Itoa(int(dec)) + "f"
|
||||
s := []byte(fmt.Sprintf(format, d))
|
||||
|
||||
// If too wide, fill with asterisks (Harbour behavior)
|
||||
// NaN/Inf → asterisks (Harbour: field width overflow marker)
|
||||
if math.IsNaN(d) || math.IsInf(d, 0) {
|
||||
for i := range raw {
|
||||
raw[i] = '*'
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// Use strconv.AppendFloat into a stack-allocated scratch buffer.
|
||||
// Skips fmt.Sprintf's format-string parsing and its temporary
|
||||
// string allocation — 3–5× faster per write, zero heap allocs on
|
||||
// the hot path. 48 bytes fits any DBF numeric field (max 20 len).
|
||||
var scratch [48]byte
|
||||
s := strconv.AppendFloat(scratch[:0], d, 'f', int(dec), 64)
|
||||
|
||||
// Overflow → asterisks, same as before.
|
||||
if len(s) > int(fieldLen) {
|
||||
for i := range raw {
|
||||
raw[i] = '*'
|
||||
@@ -406,8 +446,12 @@ func formatNumericField(raw []byte, fieldLen, dec byte, val hbrt.Value) {
|
||||
return
|
||||
}
|
||||
|
||||
// Right-align, space-pad left
|
||||
copy(raw, s)
|
||||
// Right-align, space-pad left.
|
||||
padLen := int(fieldLen) - len(s)
|
||||
for i := 0; i < padLen; i++ {
|
||||
raw[i] = ' '
|
||||
}
|
||||
copy(raw[padLen:], s)
|
||||
}
|
||||
|
||||
func putDateField(raw []byte, fieldLen byte, val hbrt.Value) {
|
||||
|
||||
@@ -43,6 +43,21 @@ const (
|
||||
VersionFPT = 0xF5 // DBF + FPT memo
|
||||
)
|
||||
|
||||
// Field flag bits (byte at field descriptor offset 18).
|
||||
// Harbour: HB_FF_* in hbapirdd.h — matches our FieldInfo.Flags convention.
|
||||
const (
|
||||
FieldFlagSystem = 0x01 // system/hidden (not exposed as user-visible)
|
||||
FieldFlagNullable = 0x02 // accepts SQL NULL, tracked via _NullFlags bit
|
||||
FieldFlagBinary = 0x04 // binary payload (no codepage conversion)
|
||||
FieldFlagAutoInc = 0x08 // auto-increment (VFP)
|
||||
)
|
||||
|
||||
// NullFlagsFieldName is the hidden column Harbour/VFP uses to track
|
||||
// SQL NULL state: 1 bit per nullable user column. Kept in fieldDescs
|
||||
// but excluded from the public FieldCount/FieldInfo view so SQL
|
||||
// `SELECT *` / DDL column enumeration never see it.
|
||||
const NullFlagsFieldName = "_NullFlags"
|
||||
|
||||
// Header represents the 32-byte DBF file header.
|
||||
// Layout is byte-identical to Harbour's DBFHEADER.
|
||||
type Header struct {
|
||||
|
||||
@@ -201,14 +201,23 @@ func (a *DBFArea) OrderCreate(params hbrdd.OrderCreateParams) error {
|
||||
// Compiled path: gengo emitted an inline Go closure that evaluates
|
||||
// the key expression directly (no MacroEval string parsing).
|
||||
// ~3x faster than the MacroEval slow path for UDF indexes.
|
||||
// ForFunc — when also set by gengo — skips the runtime parser
|
||||
// for the FOR condition in the same way.
|
||||
slab := make([]byte, int(recCount)*keyLen)
|
||||
next := 0
|
||||
oldRec := a.recNo
|
||||
trimmedFor := strings.TrimSpace(forExpr)
|
||||
hasFor := trimmedFor != "" || params.ForFunc != nil
|
||||
for r := uint32(1); r <= recCount; r++ {
|
||||
a.GoTo(r)
|
||||
if trimmedFor != "" {
|
||||
if !a.evalForInner(trimmedFor) {
|
||||
if hasFor {
|
||||
var include bool
|
||||
if params.ForFunc != nil {
|
||||
include = params.ForFunc()
|
||||
} else {
|
||||
include = a.evalForInner(trimmedFor)
|
||||
}
|
||||
if !include {
|
||||
continue
|
||||
}
|
||||
}
|
||||
@@ -238,10 +247,17 @@ func (a *DBFArea) OrderCreate(params hbrdd.OrderCreateParams) error {
|
||||
oldRec := a.recNo
|
||||
trimmedKey := strings.TrimSpace(keyExpr)
|
||||
trimmedFor := strings.TrimSpace(forExpr)
|
||||
hasFor := trimmedFor != "" || params.ForFunc != nil
|
||||
for r := uint32(1); r <= recCount; r++ {
|
||||
a.GoTo(r)
|
||||
if trimmedFor != "" {
|
||||
if !a.evalForInner(trimmedFor) {
|
||||
if hasFor {
|
||||
var include bool
|
||||
if params.ForFunc != nil {
|
||||
include = params.ForFunc()
|
||||
} else {
|
||||
include = a.evalForInner(trimmedFor)
|
||||
}
|
||||
if !include {
|
||||
continue
|
||||
}
|
||||
}
|
||||
@@ -360,7 +376,13 @@ func (a *DBFArea) OrderListAdd(path string) error {
|
||||
a.idxState.indexes = append(a.idxState.indexes, idx)
|
||||
a.idxState.names = append(a.idxState.names, path)
|
||||
a.idxState.tags = append(a.idxState.tags, "")
|
||||
a.idxState.keyExprs = append(a.idxState.keyExprs, "")
|
||||
/* Pull the key expression out of the on-disk NTX header so DBOI_EXPRESSION
|
||||
* works after re-opening an index file. Previously we appended "" here,
|
||||
* which silently broke MatchOrderByTag (TSqlIndex.prg) — the substring
|
||||
* test against an empty string always failed, so SELECT … ORDER BY <col>
|
||||
* LIMIT N could never recognize an existing tag and skipped the LIMIT
|
||||
* pushdown / sort-skip optimizations. */
|
||||
a.idxState.keyExprs = append(a.idxState.keyExprs, idx.KeyExpr())
|
||||
a.idxState.current = len(a.idxState.indexes) - 1
|
||||
|
||||
return nil
|
||||
@@ -947,6 +969,15 @@ func (a *DBFArea) OrderKeyExpr(n int) string {
|
||||
return a.idxState.keyExprs[n-1]
|
||||
}
|
||||
|
||||
// OrderKeyLen returns the byte length of keys stored in order n (1-based).
|
||||
// Zero means "unknown" (no such order, or indexes slice stale).
|
||||
func (a *DBFArea) OrderKeyLen(n int) int {
|
||||
if a.idxState == nil || n < 1 || n > len(a.idxState.indexes) {
|
||||
return 0
|
||||
}
|
||||
return a.idxState.indexes[n-1].KeyLen()
|
||||
}
|
||||
|
||||
// fieldSlice describes a direct byte range within a record buffer.
|
||||
// The optional transform is applied during key extraction (e.g. UPPER/LOWER).
|
||||
type fieldSlice struct {
|
||||
|
||||
36
hbrdd/dbf/mmap_posix.go
Normal file
36
hbrdd/dbf/mmap_posix.go
Normal file
@@ -0,0 +1,36 @@
|
||||
// Copyright (c) 2026 Charles KWON OhJun (charleskwonohjun@gmail.com)
|
||||
// All rights reserved.
|
||||
|
||||
//go:build darwin || linux
|
||||
|
||||
// DBF file mmap for POSIX — syscall.Mmap + PROT_READ + MAP_SHARED.
|
||||
// Keeps the OS page cache between us and disk so sequential scans are
|
||||
// cheap and multiple readers share pages naturally.
|
||||
|
||||
package dbf
|
||||
|
||||
import "syscall"
|
||||
|
||||
// mmapDBF maps the DBF file for zero-copy reads. Called after open.
|
||||
// On mmap failure we just leave a.mmapData == nil and the read path
|
||||
// falls back to dataFile.ReadAt — no hard error.
|
||||
func (a *DBFArea) mmapDBF() {
|
||||
fi, err := a.dataFile.Stat()
|
||||
if err != nil || fi.Size() < int64(a.header.HeaderLen) {
|
||||
return
|
||||
}
|
||||
data, err := syscall.Mmap(int(a.dataFile.Fd()), 0, int(fi.Size()),
|
||||
syscall.PROT_READ, syscall.MAP_SHARED)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
a.mmapData = data
|
||||
}
|
||||
|
||||
// unmapDBF releases the mmap.
|
||||
func (a *DBFArea) unmapDBF() {
|
||||
if a.mmapData != nil {
|
||||
syscall.Munmap(a.mmapData)
|
||||
a.mmapData = nil
|
||||
}
|
||||
}
|
||||
92
hbrdd/dbf/mmap_windows.go
Normal file
92
hbrdd/dbf/mmap_windows.go
Normal file
@@ -0,0 +1,92 @@
|
||||
// Copyright (c) 2026 Charles KWON OhJun (charleskwonohjun@gmail.com)
|
||||
// All rights reserved.
|
||||
|
||||
//go:build windows
|
||||
|
||||
// Windows mmap for DBF record data — CreateFileMappingW + MapViewOfFile
|
||||
// with PAGE_READONLY. Parallels the POSIX syscall.Mmap path: on mmap
|
||||
// failure we leave a.mmapData == nil so reads fall back to ReadAt.
|
||||
//
|
||||
// Mapping handles are tracked in a package-local registry keyed by
|
||||
// view address so unmapDBF can recover the HANDLE given only the
|
||||
// []byte we stored on the Area. Matches the hbrdd/ntx and hbrdd/cdx
|
||||
// implementations byte-for-byte to stay maintainable.
|
||||
|
||||
package dbf
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"sync"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const (
|
||||
pageReadonly = 0x02
|
||||
fileMapRead = 0x0004
|
||||
)
|
||||
|
||||
var (
|
||||
kernel32 = syscall.NewLazyDLL("kernel32.dll")
|
||||
procCreateFileMappingW = kernel32.NewProc("CreateFileMappingW")
|
||||
procMapViewOfFile = kernel32.NewProc("MapViewOfFile")
|
||||
procUnmapViewOfFile = kernel32.NewProc("UnmapViewOfFile")
|
||||
procCloseHandle = kernel32.NewProc("CloseHandle")
|
||||
|
||||
mappingMu sync.Mutex
|
||||
mappings = map[uintptr]syscall.Handle{}
|
||||
)
|
||||
|
||||
func (a *DBFArea) mmapDBF() {
|
||||
fi, err := a.dataFile.Stat()
|
||||
if err != nil || fi.Size() < int64(a.header.HeaderLen) {
|
||||
return
|
||||
}
|
||||
size := int(fi.Size())
|
||||
if size <= 0 {
|
||||
return
|
||||
}
|
||||
hFile := syscall.Handle(a.dataFile.Fd())
|
||||
sizeHigh := uint32(uint64(size) >> 32)
|
||||
sizeLow := uint32(uint64(size) & 0xFFFFFFFF)
|
||||
hMap, _, _ := procCreateFileMappingW.Call(
|
||||
uintptr(hFile), 0, pageReadonly,
|
||||
uintptr(sizeHigh), uintptr(sizeLow), 0,
|
||||
)
|
||||
if hMap == 0 {
|
||||
return
|
||||
}
|
||||
addr, _, _ := procMapViewOfFile.Call(hMap, fileMapRead, 0, 0, uintptr(size))
|
||||
if addr == 0 {
|
||||
procCloseHandle.Call(hMap)
|
||||
return
|
||||
}
|
||||
a.mmapData = unsafe.Slice((*byte)(unsafe.Pointer(addr)), size)
|
||||
|
||||
mappingMu.Lock()
|
||||
mappings[addr] = syscall.Handle(hMap)
|
||||
mappingMu.Unlock()
|
||||
}
|
||||
|
||||
func (a *DBFArea) unmapDBF() {
|
||||
if a.mmapData == nil {
|
||||
return
|
||||
}
|
||||
addr := uintptr(unsafe.Pointer(&a.mmapData[0]))
|
||||
mappingMu.Lock()
|
||||
hMap, ok := mappings[addr]
|
||||
delete(mappings, addr)
|
||||
mappingMu.Unlock()
|
||||
|
||||
r, _, _ := procUnmapViewOfFile.Call(addr)
|
||||
if r == 0 {
|
||||
// Best-effort — log and continue. Unmap failure usually
|
||||
// indicates a corrupted handle table, recoverable only via
|
||||
// process exit.
|
||||
_ = fmt.Sprint("UnmapViewOfFile failed")
|
||||
}
|
||||
if ok {
|
||||
procCloseHandle.Call(uintptr(hMap))
|
||||
}
|
||||
a.mmapData = nil
|
||||
}
|
||||
126
hbrdd/dbf/null.go
Normal file
126
hbrdd/dbf/null.go
Normal file
@@ -0,0 +1,126 @@
|
||||
// Copyright (c) 2026 Charles KWON OhJun (charleskwonohjun@gmail.com)
|
||||
// All rights reserved.
|
||||
|
||||
// SQL NULL support via Harbour/VFP-style _NullFlags bitmap column.
|
||||
//
|
||||
// When a table is created with at least one nullable field the DBF engine
|
||||
// appends a hidden system field named "_NullFlags" of type '0' (Harbour
|
||||
// VFP convention). The field's length is ceil(nNullable/8) bytes; each
|
||||
// nullable user field owns one bit. A set bit means "this field holds
|
||||
// SQL NULL" — readers return NIL instead of the raw value, writers
|
||||
// clear the bit on a non-NIL write.
|
||||
//
|
||||
// The _NullFlags descriptor carries FieldFlagSystem so the base area's
|
||||
// FieldCount / GetFieldInfo never expose it, keeping existing SQL /
|
||||
// SELECT * / PRG scan-column code paths blind to the hidden field.
|
||||
//
|
||||
// Reference: /mnt/d/harbour-core/src/rdd/dbf1.c — hb_dbfGetNullFlag,
|
||||
// hb_dbfSetNullFlag. Harbour also uses this column to track VARCHAR
|
||||
// length bits; Five only implements nullability for now.
|
||||
package dbf
|
||||
|
||||
// buildNullIndex populates nullFieldsIdx (descriptor index of
|
||||
// _NullFlags, -1 if none), nullBitOf (user-field descriptor index →
|
||||
// bit number within _NullFlags), and publicFieldCount. Call after
|
||||
// fieldDescs has been populated.
|
||||
func (a *DBFArea) buildNullIndex() {
|
||||
a.nullFieldsIdx = -1
|
||||
a.nullBitOf = nil
|
||||
for i := range a.fieldDescs {
|
||||
if a.fieldDescs[i].GetName() == NullFlagsFieldName {
|
||||
a.nullFieldsIdx = i
|
||||
break
|
||||
}
|
||||
}
|
||||
if a.nullFieldsIdx < 0 {
|
||||
return
|
||||
}
|
||||
a.nullBitOf = make(map[int]int, 4)
|
||||
bit := 0
|
||||
for i := range a.fieldDescs {
|
||||
if i == a.nullFieldsIdx {
|
||||
continue
|
||||
}
|
||||
if a.fieldDescs[i].Flags&FieldFlagNullable != 0 {
|
||||
a.nullBitOf[i] = bit
|
||||
bit++
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// isFieldNull reports whether the given descriptor index currently
|
||||
// holds SQL NULL. Only meaningful for fields marked nullable.
|
||||
func (a *DBFArea) isFieldNull(fieldIdx int) bool {
|
||||
if a.nullFieldsIdx < 0 || a.nullBitOf == nil {
|
||||
return false
|
||||
}
|
||||
bit, ok := a.nullBitOf[fieldIdx]
|
||||
if !ok {
|
||||
return false
|
||||
}
|
||||
off := a.offsets[a.nullFieldsIdx]
|
||||
byteIdx := bit / 8
|
||||
bitIdx := bit % 8
|
||||
if int(off)+byteIdx >= len(a.recBuf) {
|
||||
return false
|
||||
}
|
||||
return a.recBuf[int(off)+byteIdx]&(1<<uint(bitIdx)) != 0
|
||||
}
|
||||
|
||||
// setFieldNull sets or clears the SQL NULL bit for the given
|
||||
// descriptor index. Caller is responsible for having COW-ed recBuf
|
||||
// (PutValue does this before calling).
|
||||
func (a *DBFArea) setFieldNull(fieldIdx int, isNull bool) {
|
||||
if a.nullFieldsIdx < 0 || a.nullBitOf == nil {
|
||||
return
|
||||
}
|
||||
bit, ok := a.nullBitOf[fieldIdx]
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
off := a.offsets[a.nullFieldsIdx]
|
||||
byteIdx := bit / 8
|
||||
bitIdx := bit % 8
|
||||
if int(off)+byteIdx >= len(a.recBuf) {
|
||||
return
|
||||
}
|
||||
mask := byte(1) << uint(bitIdx)
|
||||
if isNull {
|
||||
a.recBuf[int(off)+byteIdx] |= mask
|
||||
} else {
|
||||
a.recBuf[int(off)+byteIdx] &^= mask
|
||||
}
|
||||
}
|
||||
|
||||
// countNullableFields returns the number of user fields (non-system)
|
||||
// marked nullable — used at CREATE time to size the _NullFlags column.
|
||||
func countNullableFields(fields []FieldDesc) int {
|
||||
n := 0
|
||||
for i := range fields {
|
||||
if fields[i].Flags&FieldFlagSystem != 0 {
|
||||
continue
|
||||
}
|
||||
if fields[i].Flags&FieldFlagNullable != 0 {
|
||||
n++
|
||||
}
|
||||
}
|
||||
return n
|
||||
}
|
||||
|
||||
// appendNullFlagsField returns fields with an appended _NullFlags
|
||||
// system field sized to hold one bit per nullable user field. If no
|
||||
// fields are nullable the input is returned unchanged.
|
||||
func appendNullFlagsField(fields []FieldDesc) []FieldDesc {
|
||||
n := countNullableFields(fields)
|
||||
if n == 0 {
|
||||
return fields
|
||||
}
|
||||
nBytes := (n + 7) / 8
|
||||
var fd FieldDesc
|
||||
fd.SetName(NullFlagsFieldName)
|
||||
fd.Type = '0' // Harbour VFP convention for _NullFlags
|
||||
fd.Len = byte(nBytes)
|
||||
fd.Dec = 0
|
||||
fd.Flags = FieldFlagSystem | FieldFlagBinary
|
||||
return append(fields, fd)
|
||||
}
|
||||
178
hbrdd/dbf/null_test.go
Normal file
178
hbrdd/dbf/null_test.go
Normal file
@@ -0,0 +1,178 @@
|
||||
// Copyright (c) 2026 Charles KWON OhJun (charleskwonohjun@gmail.com)
|
||||
// All rights reserved.
|
||||
|
||||
package dbf
|
||||
|
||||
import (
|
||||
"five/hbrdd"
|
||||
"five/hbrt"
|
||||
"path/filepath"
|
||||
"testing"
|
||||
)
|
||||
|
||||
// TestNullFlagsCreateAndRead exercises the _NullFlags bitmap through
|
||||
// create → append → write NIL → read-back → reopen.
|
||||
func TestNullFlagsCreateAndRead(t *testing.T) {
|
||||
dir := tempDir(t)
|
||||
path := filepath.Join(dir, "null.dbf")
|
||||
|
||||
drv := &DBFDriver{}
|
||||
area, err := drv.Create(hbrdd.CreateParams{
|
||||
Path: path,
|
||||
Fields: []hbrdd.FieldInfo{
|
||||
{Name: "ID", Type: 'N', Len: 4, Dec: 0},
|
||||
{Name: "NAME", Type: 'C', Len: 20, Flags: FieldFlagNullable},
|
||||
{Name: "AGE", Type: 'N', Len: 5, Dec: 0, Flags: FieldFlagNullable},
|
||||
},
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
dbfArea := area.(*DBFArea)
|
||||
|
||||
// Public FieldCount must hide _NullFlags — user-visible stays 3.
|
||||
if dbfArea.FieldCount() != 3 {
|
||||
t.Fatalf("public FieldCount = %d, want 3 (hidden _NullFlags leaking)", dbfArea.FieldCount())
|
||||
}
|
||||
// Internal descriptor count includes _NullFlags.
|
||||
if len(dbfArea.fieldDescs) != 4 {
|
||||
t.Fatalf("fieldDescs len = %d, want 4", len(dbfArea.fieldDescs))
|
||||
}
|
||||
if dbfArea.nullFieldsIdx != 3 {
|
||||
t.Fatalf("nullFieldsIdx = %d, want 3", dbfArea.nullFieldsIdx)
|
||||
}
|
||||
// NAME is field index 1, AGE is index 2. Bit assignment goes in
|
||||
// descriptor order among nullable columns → NAME=bit0, AGE=bit1.
|
||||
if bit, ok := dbfArea.nullBitOf[1]; !ok || bit != 0 {
|
||||
t.Fatalf("NAME bit = %d ok=%v, want bit 0", bit, ok)
|
||||
}
|
||||
if bit, ok := dbfArea.nullBitOf[2]; !ok || bit != 1 {
|
||||
t.Fatalf("AGE bit = %d ok=%v, want bit 1", bit, ok)
|
||||
}
|
||||
|
||||
// Append three records: one fully populated, one with NIL name,
|
||||
// one with both name and age NIL. The non-null row round-trips
|
||||
// normally; the null rows must read back NIL.
|
||||
if err := dbfArea.Append(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
dbfArea.PutValue(0, hbrt.MakeInt(1))
|
||||
dbfArea.PutValue(1, hbrt.MakeString("alice"))
|
||||
dbfArea.PutValue(2, hbrt.MakeInt(30))
|
||||
|
||||
if err := dbfArea.Append(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
dbfArea.PutValue(0, hbrt.MakeInt(2))
|
||||
dbfArea.PutValue(1, hbrt.MakeNil()) // NAME null
|
||||
dbfArea.PutValue(2, hbrt.MakeInt(40))
|
||||
|
||||
if err := dbfArea.Append(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
dbfArea.PutValue(0, hbrt.MakeInt(3))
|
||||
dbfArea.PutValue(1, hbrt.MakeNil()) // NAME null
|
||||
dbfArea.PutValue(2, hbrt.MakeNil()) // AGE null
|
||||
dbfArea.Flush()
|
||||
dbfArea.Close()
|
||||
|
||||
// Re-open and verify null bits survive round-trip on disk.
|
||||
area2, err := drv.Open(hbrdd.OpenParams{Path: path})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer area2.Close()
|
||||
d2 := area2.(*DBFArea)
|
||||
|
||||
if d2.nullFieldsIdx != 3 {
|
||||
t.Fatalf("after reopen nullFieldsIdx = %d, want 3", d2.nullFieldsIdx)
|
||||
}
|
||||
|
||||
// Record 1: all values present.
|
||||
d2.GoTo(1)
|
||||
if v, _ := d2.GetValue(1); v.IsNil() {
|
||||
t.Errorf("rec1 NAME unexpectedly NIL")
|
||||
}
|
||||
if v, _ := d2.GetValue(2); v.IsNil() {
|
||||
t.Errorf("rec1 AGE unexpectedly NIL")
|
||||
}
|
||||
|
||||
// Record 2: NAME null, AGE present.
|
||||
d2.GoTo(2)
|
||||
if v, _ := d2.GetValue(1); !v.IsNil() {
|
||||
t.Errorf("rec2 NAME = %v, want NIL", v)
|
||||
}
|
||||
if v, _ := d2.GetValue(2); v.IsNil() || v.AsNumInt() != 40 {
|
||||
t.Errorf("rec2 AGE = %v, want 40", v)
|
||||
}
|
||||
|
||||
// Record 3: both null.
|
||||
d2.GoTo(3)
|
||||
if v, _ := d2.GetValue(1); !v.IsNil() {
|
||||
t.Errorf("rec3 NAME = %v, want NIL", v)
|
||||
}
|
||||
if v, _ := d2.GetValue(2); !v.IsNil() {
|
||||
t.Errorf("rec3 AGE = %v, want NIL", v)
|
||||
}
|
||||
}
|
||||
|
||||
// TestNullFlagsNoNullableFields ensures tables without any nullable
|
||||
// columns get no _NullFlags column — keeping byte-identical layout to
|
||||
// pre-nullable Five / upstream Harbour DBFs.
|
||||
func TestNullFlagsNoNullableFields(t *testing.T) {
|
||||
dir := tempDir(t)
|
||||
path := filepath.Join(dir, "nonull.dbf")
|
||||
|
||||
drv := &DBFDriver{}
|
||||
area, err := drv.Create(hbrdd.CreateParams{
|
||||
Path: path,
|
||||
Fields: []hbrdd.FieldInfo{
|
||||
{Name: "ID", Type: 'N', Len: 4},
|
||||
{Name: "NAME", Type: 'C', Len: 20},
|
||||
},
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
d := area.(*DBFArea)
|
||||
if len(d.fieldDescs) != 2 {
|
||||
t.Fatalf("fieldDescs len = %d, want 2 (no _NullFlags should be added)", len(d.fieldDescs))
|
||||
}
|
||||
if d.nullFieldsIdx != -1 {
|
||||
t.Fatalf("nullFieldsIdx = %d, want -1", d.nullFieldsIdx)
|
||||
}
|
||||
d.Close()
|
||||
}
|
||||
|
||||
// TestNullFlagsClearsOnOverwrite verifies that writing a non-NIL
|
||||
// value to a previously-NULL field clears the bit and the raw bytes
|
||||
// become observable on read.
|
||||
func TestNullFlagsClearsOnOverwrite(t *testing.T) {
|
||||
dir := tempDir(t)
|
||||
path := filepath.Join(dir, "overwrite.dbf")
|
||||
|
||||
drv := &DBFDriver{}
|
||||
area, _ := drv.Create(hbrdd.CreateParams{
|
||||
Path: path,
|
||||
Fields: []hbrdd.FieldInfo{
|
||||
{Name: "V", Type: 'N', Len: 5, Dec: 0, Flags: FieldFlagNullable},
|
||||
},
|
||||
})
|
||||
d := area.(*DBFArea)
|
||||
d.Append()
|
||||
d.PutValue(0, hbrt.MakeNil())
|
||||
if v, _ := d.GetValue(0); !v.IsNil() {
|
||||
t.Fatalf("after NIL put, GetValue = %v, want NIL", v)
|
||||
}
|
||||
// Overwrite with numeric — bit must clear.
|
||||
d.PutValue(0, hbrt.MakeInt(42))
|
||||
if v, _ := d.GetValue(0); v.IsNil() || v.AsNumInt() != 42 {
|
||||
t.Fatalf("after int put, GetValue = %v, want 42", v)
|
||||
}
|
||||
// And NIL again — bit must reset.
|
||||
d.PutValue(0, hbrt.MakeNil())
|
||||
if v, _ := d.GetValue(0); !v.IsNil() {
|
||||
t.Fatalf("after second NIL put, GetValue = %v, want NIL", v)
|
||||
}
|
||||
d.Close()
|
||||
}
|
||||
@@ -175,6 +175,16 @@ type OrderCreateParams struct {
|
||||
// Contract: caller must position the workarea (GoTo) before calling.
|
||||
// Returns the key value for the current record.
|
||||
KeyFunc func() hbrt.Value
|
||||
|
||||
// ForFunc is the compiled counterpart of KeyFunc for the optional
|
||||
// FOR expression. When non-nil the indexer calls it instead of
|
||||
// parsing ForExpr as a string and running it through the macro
|
||||
// evaluator — eliminates strings.Index/ToUpper/splitArgs per record
|
||||
// in filtered-index builds and rebuilds. Returns true when the
|
||||
// current record should be included.
|
||||
//
|
||||
// Contract: caller must position the workarea (GoTo) before calling.
|
||||
ForFunc func() bool
|
||||
}
|
||||
|
||||
// OrderInfo holds information about an index order.
|
||||
|
||||
@@ -24,6 +24,7 @@ import (
|
||||
"sort"
|
||||
"strings"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
)
|
||||
|
||||
// --- Driver ---
|
||||
@@ -103,14 +104,43 @@ func normalizeName(s string) string {
|
||||
// --- Table (shared data) ---
|
||||
|
||||
type memTable struct {
|
||||
mu sync.RWMutex
|
||||
// mu serializes WRITERS only (Append/Delete/Recall/PutValue/Pack).
|
||||
// Readers use records() — a lock-free atomic load of the current
|
||||
// snapshot. Matches Harbour SHARED semantics: readers see a
|
||||
// point-in-time view of the record slice; in-place field mutations
|
||||
// are last-writer-wins (callers that need row consistency take an
|
||||
// explicit RLock via the runtime's record-lock RTL).
|
||||
mu sync.Mutex
|
||||
// recordsP holds the current []memRecord snapshot. Stored as
|
||||
// *[]memRecord to work with atomic.Pointer's typed API. Writers
|
||||
// publish new slices via setRecords() after mutation; readers Load
|
||||
// once per scan entry point.
|
||||
recordsP atomic.Pointer[[]memRecord]
|
||||
|
||||
name string
|
||||
fields []hbrdd.FieldInfo
|
||||
records []memRecord // all records
|
||||
indexes []*memIndex // active indexes
|
||||
indexes []*memIndex // active indexes
|
||||
openCount int
|
||||
}
|
||||
|
||||
// records returns the current record snapshot. Caller can iterate
|
||||
// without holding any lock — the slice is immutable from the reader's
|
||||
// perspective (mutations happen via COW + atomic swap for structural
|
||||
// changes; in-place field writes are racy-but-tolerated per Harbour
|
||||
// SHARED semantics).
|
||||
func (tbl *memTable) records() []memRecord {
|
||||
p := tbl.recordsP.Load()
|
||||
if p == nil {
|
||||
return nil
|
||||
}
|
||||
return *p
|
||||
}
|
||||
|
||||
// setRecords publishes a new snapshot. Caller must hold tbl.mu.
|
||||
func (tbl *memTable) setRecords(r []memRecord) {
|
||||
tbl.recordsP.Store(&r)
|
||||
}
|
||||
|
||||
type memRecord struct {
|
||||
data []hbrt.Value // field values (0-based)
|
||||
deleted bool
|
||||
@@ -159,7 +189,7 @@ func newMemArea(tbl *memTable, alias string, drv *MemDriver) *memArea {
|
||||
eof: true,
|
||||
curIndex: -1,
|
||||
}
|
||||
if len(tbl.records) > 0 {
|
||||
if len(tbl.records()) > 0 {
|
||||
a.recNo = 1
|
||||
a.eof = false
|
||||
}
|
||||
@@ -213,9 +243,7 @@ func (a *memArea) ClearFilter() error {
|
||||
func (a *memArea) HasFilter() bool { return a.filterBlock != nil }
|
||||
|
||||
func (a *memArea) GoTo(recNo uint32) error {
|
||||
a.tbl.mu.RLock()
|
||||
count := uint32(len(a.tbl.records))
|
||||
a.tbl.mu.RUnlock()
|
||||
count := uint32(len(a.tbl.records()))
|
||||
|
||||
a.bof = false
|
||||
a.found = false
|
||||
@@ -230,9 +258,7 @@ func (a *memArea) GoTo(recNo uint32) error {
|
||||
}
|
||||
|
||||
func (a *memArea) GoTop() error {
|
||||
a.tbl.mu.RLock()
|
||||
count := uint32(len(a.tbl.records))
|
||||
a.tbl.mu.RUnlock()
|
||||
count := uint32(len(a.tbl.records()))
|
||||
|
||||
a.bof = false
|
||||
a.found = false
|
||||
@@ -261,9 +287,7 @@ func (a *memArea) GoTop() error {
|
||||
}
|
||||
|
||||
func (a *memArea) GoBottom() error {
|
||||
a.tbl.mu.RLock()
|
||||
count := uint32(len(a.tbl.records))
|
||||
a.tbl.mu.RUnlock()
|
||||
count := uint32(len(a.tbl.records()))
|
||||
|
||||
a.bof = false
|
||||
a.found = false
|
||||
@@ -296,9 +320,7 @@ func (a *memArea) Skip(count int64) error {
|
||||
return a.skipIndexed(count)
|
||||
}
|
||||
|
||||
a.tbl.mu.RLock()
|
||||
total := uint32(len(a.tbl.records))
|
||||
a.tbl.mu.RUnlock()
|
||||
total := uint32(len(a.tbl.records()))
|
||||
|
||||
a.found = false
|
||||
|
||||
@@ -335,7 +357,7 @@ func (a *memArea) skipIndexed(count int64) error {
|
||||
newPos := a.indexPos + int(count)
|
||||
if newPos >= len(idx.entries) {
|
||||
a.indexPos = len(idx.entries)
|
||||
a.recNo = uint32(len(a.tbl.records)) + 1
|
||||
a.recNo = uint32(len(a.tbl.records())) + 1
|
||||
a.eof = true
|
||||
} else {
|
||||
a.indexPos = newPos
|
||||
@@ -365,19 +387,16 @@ func (a *memArea) skipIndexed(count int64) error {
|
||||
func (a *memArea) RecNo() uint32 { return a.recNo }
|
||||
|
||||
func (a *memArea) RecCount() (uint32, error) {
|
||||
a.tbl.mu.RLock()
|
||||
defer a.tbl.mu.RUnlock()
|
||||
return uint32(len(a.tbl.records)), nil
|
||||
return uint32(len(a.tbl.records())), nil
|
||||
}
|
||||
|
||||
func (a *memArea) Deleted() bool {
|
||||
a.tbl.mu.RLock()
|
||||
defer a.tbl.mu.RUnlock()
|
||||
recs := a.tbl.records()
|
||||
i := int(a.recNo) - 1
|
||||
if i < 0 || i >= len(a.tbl.records) {
|
||||
if i < 0 || i >= len(recs) {
|
||||
return false
|
||||
}
|
||||
return a.tbl.records[i].deleted
|
||||
return recs[i].deleted
|
||||
}
|
||||
|
||||
// --- Field access ---
|
||||
@@ -392,14 +411,16 @@ func (a *memArea) GetFieldInfo(index int) hbrdd.FieldInfo {
|
||||
}
|
||||
|
||||
func (a *memArea) GetValue(fieldIndex int) (hbrt.Value, error) {
|
||||
a.tbl.mu.RLock()
|
||||
defer a.tbl.mu.RUnlock()
|
||||
|
||||
// Hot path — lock-free read. The atomic load gives us a
|
||||
// point-in-time snapshot; a concurrent PutValue mutating the same
|
||||
// rec.data[fieldIndex] in place is tolerated (last-writer-wins,
|
||||
// matches Harbour SHARED semantics).
|
||||
recs := a.tbl.records()
|
||||
i := int(a.recNo) - 1
|
||||
if i < 0 || i >= len(a.tbl.records) {
|
||||
if i < 0 || i >= len(recs) {
|
||||
return hbrt.MakeNil(), nil // phantom record
|
||||
}
|
||||
rec := a.tbl.records[i]
|
||||
rec := recs[i]
|
||||
if fieldIndex < 0 || fieldIndex >= len(rec.data) {
|
||||
return hbrt.MakeNil(), fmt.Errorf("field index %d out of range", fieldIndex)
|
||||
}
|
||||
@@ -410,14 +431,20 @@ func (a *memArea) PutValue(fieldIndex int, val hbrt.Value) error {
|
||||
a.tbl.mu.Lock()
|
||||
defer a.tbl.mu.Unlock()
|
||||
|
||||
recs := a.tbl.records()
|
||||
i := int(a.recNo) - 1
|
||||
if i < 0 || i >= len(a.tbl.records) {
|
||||
if i < 0 || i >= len(recs) {
|
||||
return fmt.Errorf("no current record")
|
||||
}
|
||||
if fieldIndex < 0 || fieldIndex >= len(a.tbl.records[i].data) {
|
||||
if fieldIndex < 0 || fieldIndex >= len(recs[i].data) {
|
||||
return fmt.Errorf("field index %d out of range", fieldIndex)
|
||||
}
|
||||
a.tbl.records[i].data[fieldIndex] = val
|
||||
// In-place field write. Writers are serialized by mu; concurrent
|
||||
// readers may observe the old or new value (no torn read since
|
||||
// hbrt.Value fits in a single machine word + pointer, and Go
|
||||
// guarantees pointer-sized stores are atomic). Matches Harbour
|
||||
// SHARED: callers needing isolation take an explicit record lock.
|
||||
recs[i].data[fieldIndex] = val
|
||||
return nil
|
||||
}
|
||||
|
||||
@@ -445,8 +472,14 @@ func (a *memArea) Append() error {
|
||||
rec.data[j] = hbrt.MakeNil()
|
||||
}
|
||||
}
|
||||
a.tbl.records = append(a.tbl.records, rec)
|
||||
a.recNo = uint32(len(a.tbl.records))
|
||||
// Append: publish a grown slice via atomic swap. When the backing
|
||||
// has capacity, Go's append reuses it — safe here because prior
|
||||
// readers hold snapshots whose len() bounds are fixed, so they
|
||||
// never read past their known length into the new slot.
|
||||
recs := a.tbl.records()
|
||||
recs = append(recs, rec)
|
||||
a.tbl.setRecords(recs)
|
||||
a.recNo = uint32(len(recs))
|
||||
a.eof = false
|
||||
a.bof = false
|
||||
return nil
|
||||
@@ -455,9 +488,10 @@ func (a *memArea) Append() error {
|
||||
func (a *memArea) Delete() error {
|
||||
a.tbl.mu.Lock()
|
||||
defer a.tbl.mu.Unlock()
|
||||
recs := a.tbl.records()
|
||||
i := int(a.recNo) - 1
|
||||
if i >= 0 && i < len(a.tbl.records) {
|
||||
a.tbl.records[i].deleted = true
|
||||
if i >= 0 && i < len(recs) {
|
||||
recs[i].deleted = true
|
||||
}
|
||||
return nil
|
||||
}
|
||||
@@ -465,9 +499,10 @@ func (a *memArea) Delete() error {
|
||||
func (a *memArea) Recall() error {
|
||||
a.tbl.mu.Lock()
|
||||
defer a.tbl.mu.Unlock()
|
||||
recs := a.tbl.records()
|
||||
i := int(a.recNo) - 1
|
||||
if i >= 0 && i < len(a.tbl.records) {
|
||||
a.tbl.records[i].deleted = false
|
||||
if i >= 0 && i < len(recs) {
|
||||
recs[i].deleted = false
|
||||
}
|
||||
return nil
|
||||
}
|
||||
@@ -475,13 +510,16 @@ func (a *memArea) Recall() error {
|
||||
func (a *memArea) Pack() error {
|
||||
a.tbl.mu.Lock()
|
||||
defer a.tbl.mu.Unlock()
|
||||
var kept []memRecord
|
||||
for _, r := range a.tbl.records {
|
||||
// Pack builds a fresh slice and swaps — old snapshot still
|
||||
// iterable by any in-flight readers until they finish.
|
||||
old := a.tbl.records()
|
||||
kept := make([]memRecord, 0, len(old))
|
||||
for _, r := range old {
|
||||
if !r.deleted {
|
||||
kept = append(kept, r)
|
||||
}
|
||||
}
|
||||
a.tbl.records = kept
|
||||
a.tbl.setRecords(kept)
|
||||
a.recNo = 1
|
||||
if len(kept) == 0 {
|
||||
a.eof = true
|
||||
@@ -492,7 +530,7 @@ func (a *memArea) Pack() error {
|
||||
func (a *memArea) Zap() error {
|
||||
a.tbl.mu.Lock()
|
||||
defer a.tbl.mu.Unlock()
|
||||
a.tbl.records = nil
|
||||
a.tbl.setRecords(nil)
|
||||
a.tbl.indexes = nil
|
||||
a.recNo = 1
|
||||
a.eof = true
|
||||
@@ -512,7 +550,7 @@ func (a *memArea) CreateIndex(tag string, fieldIndex int, desc bool) {
|
||||
}
|
||||
|
||||
// Build entries
|
||||
for i, rec := range a.tbl.records {
|
||||
for i, rec := range a.tbl.records() {
|
||||
if rec.deleted {
|
||||
continue
|
||||
}
|
||||
@@ -595,7 +633,7 @@ func (a *memArea) Seek(key hbrt.Value, soft bool) bool {
|
||||
// Not found
|
||||
a.found = false
|
||||
a.eof = true
|
||||
a.recNo = uint32(len(a.tbl.records)) + 1
|
||||
a.recNo = uint32(len(a.tbl.records())) + 1
|
||||
return false
|
||||
}
|
||||
|
||||
|
||||
@@ -1,16 +1,86 @@
|
||||
//go:build windows
|
||||
|
||||
// Windows mmap — CreateFileMappingW + MapViewOfFile. Read-only view
|
||||
// matches the POSIX PROT_READ|MAP_SHARED semantics the rest of the RDD
|
||||
// code expects. The mapping HANDLE must stay alive alongside the view,
|
||||
// so we stash it in a package-local registry keyed by the slice data
|
||||
// pointer; Unmap looks it up and closes the handle after unmapping
|
||||
// the view.
|
||||
|
||||
package ntx
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"os"
|
||||
"sync"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const (
|
||||
pageReadonly = 0x02
|
||||
fileMapRead = 0x0004
|
||||
)
|
||||
|
||||
var (
|
||||
kernel32 = syscall.NewLazyDLL("kernel32.dll")
|
||||
procCreateFileMappingW = kernel32.NewProc("CreateFileMappingW")
|
||||
procMapViewOfFile = kernel32.NewProc("MapViewOfFile")
|
||||
procUnmapViewOfFile = kernel32.NewProc("UnmapViewOfFile")
|
||||
procCloseHandle = kernel32.NewProc("CloseHandle")
|
||||
|
||||
// handle registry — keyed by view pointer (uintptr of slice's
|
||||
// first byte). Lets munmapFile recover the mapping handle given
|
||||
// only the []byte the caller held.
|
||||
mappingMu sync.Mutex
|
||||
mappings = map[uintptr]syscall.Handle{}
|
||||
)
|
||||
|
||||
func mmapFile(f *os.File, size int) ([]byte, error) {
|
||||
return nil, errors.New("mmap not supported on Windows")
|
||||
if size <= 0 {
|
||||
return nil, fmt.Errorf("mmap: non-positive size %d", size)
|
||||
}
|
||||
hFile := syscall.Handle(f.Fd())
|
||||
sizeHigh := uint32(uint64(size) >> 32)
|
||||
sizeLow := uint32(uint64(size) & 0xFFFFFFFF)
|
||||
hMap, _, err := procCreateFileMappingW.Call(
|
||||
uintptr(hFile), 0, pageReadonly,
|
||||
uintptr(sizeHigh), uintptr(sizeLow), 0,
|
||||
)
|
||||
if hMap == 0 {
|
||||
return nil, fmt.Errorf("CreateFileMapping: %v", err)
|
||||
}
|
||||
addr, _, err := procMapViewOfFile.Call(
|
||||
hMap, fileMapRead, 0, 0, uintptr(size),
|
||||
)
|
||||
if addr == 0 {
|
||||
procCloseHandle.Call(hMap)
|
||||
return nil, fmt.Errorf("MapViewOfFile: %v", err)
|
||||
}
|
||||
data := unsafe.Slice((*byte)(unsafe.Pointer(addr)), size)
|
||||
|
||||
mappingMu.Lock()
|
||||
mappings[addr] = syscall.Handle(hMap)
|
||||
mappingMu.Unlock()
|
||||
return data, nil
|
||||
}
|
||||
|
||||
func munmapFile(data []byte) error {
|
||||
if len(data) == 0 {
|
||||
return nil
|
||||
}
|
||||
addr := uintptr(unsafe.Pointer(&data[0]))
|
||||
mappingMu.Lock()
|
||||
hMap, ok := mappings[addr]
|
||||
delete(mappings, addr)
|
||||
mappingMu.Unlock()
|
||||
|
||||
r, _, err := procUnmapViewOfFile.Call(addr)
|
||||
if r == 0 {
|
||||
return fmt.Errorf("UnmapViewOfFile: %v", err)
|
||||
}
|
||||
if ok {
|
||||
procCloseHandle.Call(uintptr(hMap))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
@@ -288,7 +288,8 @@ func (idx *Index) remapFile() {
|
||||
idx.mmapFile()
|
||||
}
|
||||
|
||||
func (idx *Index) KeyLen() int { return idx.keyLen }
|
||||
func (idx *Index) KeyLen() int { return idx.keyLen }
|
||||
func (idx *Index) KeyExpr() string { return idx.header.GetKeyExpr() }
|
||||
func (idx *Index) TestGetMmap() []byte { return idx.mmapData }
|
||||
|
||||
func (idx *Index) Close() error {
|
||||
|
||||
@@ -203,6 +203,25 @@ func parseAreaNum(s string) uint16 {
|
||||
return uint16(n)
|
||||
}
|
||||
|
||||
// EnumerateAreas invokes fn once per open workarea with (nWA, alias, area).
|
||||
// Snapshot of the slot→area map is taken first so fn can safely manipulate
|
||||
// workareas without mutating the loop. Used by the diagnostic ErrorLog
|
||||
// writer to dump every open table's state.
|
||||
func (wm *WorkAreaManager) EnumerateAreas(fn func(nWA uint16, alias string, area Area)) {
|
||||
type slot struct {
|
||||
num uint16
|
||||
alias string
|
||||
area Area
|
||||
}
|
||||
snapshot := make([]slot, 0, len(wm.areas))
|
||||
for num, area := range wm.areas {
|
||||
snapshot = append(snapshot, slot{num, area.Alias(), area})
|
||||
}
|
||||
for _, s := range snapshot {
|
||||
fn(s.num, s.alias, s.area)
|
||||
}
|
||||
}
|
||||
|
||||
// CloseAll closes all open work areas.
|
||||
func (wm *WorkAreaManager) CloseAll() {
|
||||
for num, area := range wm.areas {
|
||||
|
||||
Reference in New Issue
Block a user