This directory contains a subset of the upstream Judy-1.0.5 sources, bundled so php-judy can build without a system libJudy. License: LGPL-2.1-or-later — see COPYING (upstream's file, verbatim) and the root THIRD-PARTY.md.

• Upstream: https://downloads.sourceforge.net/project/judy/judy/Judy-1.0.5/Judy-1.0.5.tar.gz
• Version: Judy-1.0.5
• Tarball sha256: d2704089f85fdb6f2cd7e77be21170ced4b4375c03ef1ad4cf1075bd414a63eb
• Imported: 2026-08-18, byte-identical to the tarball, preserving the upstream relative layout under libjudy/

• COPYING — upstream LGPL-2.1 license text
• src/Judy.h — public API header
• src/JudyCommon/ — the complete shared engine: every *.c and *.h in the directory, including JudyPrintJP.c (a debug/trace helper #included by JudyGet/JudyIns/JudyDel/JudyPrevNextEmpty under trace ifdefs, so it is not dead code)
• src/Judy1/Judy1.h, src/JudyL/JudyL.h — per-variant internal headers
• src/JudySL/JudySL.c, src/JudyHS/JudyHS.c — string-keyed layers

• Upstream autotools/build files (configure, Makefile.am/.in, aclocal.m4, bootstrap, libtool helpers) — php-judy wires these sources into its own build system instead
• doc/, test/, tool/, src/apps/, per-directory READMEs, build.bat, sh_build, Judy.h.check.c
• src/JudyHS/JudyHS.h — a standalone compatibility header for pre-JudyHS Judy.h; nothing includes it (the #include in JudyHS.c is commented out upstream)
• Upstream's build-time-generated Judy1/JudyL wrapper sources and size-class tables — php-judy ships its own clearly-marked equivalents instead: the build shims under src/wrappers/ and the pre-generated src/Judy1/Judy1Tables.c / src/JudyL/JudyLTables.c (see the provenance headers in those files)

Every change to these sources is documented in PATCHES.md and available as a git diff against the pristine import commit; that table is the authoritative, current list. Files added by php-judy (wrappers, pre-generated tables) are additions, not modifications — see PATCHES.md.

These sources are the default build (--with-judy absent, yes or bundled): config.m4/config.w32 compile them into the extension directly. --with-judy=DIR instead links against a system libJudy and compiles nothing under this directory. The vendored units are compiled at -O2 -fno-lto -fno-unroll-loops only — never -O3/LTO/loop unrolling — and the flags are attached per-source so the extension's own optimization flags cannot leak in (see #131; measured on gcc 13/14, -funroll-loops at any -O level makes gcc exploit the out-of-bounds immediate copy and silently lose keys, so these flags are load-bearing for correctness).