Start a contrib/ with libgc and libregex (#127)

2025-08-07 22:42:54 +03:00 · 2024-05-09 16:09:33 -04:00
parent 089a75bb4e
commit 15ae179b5a
3 changed files with 222 additions and 0 deletions
--- a/contrib/libregex.c
+++ b/contrib/libregex.c
@@ -0,0 +1,140 @@
+#if 0
+# Stripped down, w64devkit, static, unity build of the PCRE2 POSIX regex
+# library. This script builds and installs regex.h and libregex.a inside
+# w64devkit. Link with -lregex. It is pretty bulky, nearly 300KiB.
+#
+# Copy and run this script in the root fo the PCRE source tree. Tested
+# with PCRE 10.43.
+#
+#     $ sh libregex.c
+#
+# Ref: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/regex.h.html
+# This is free and unencumbered software released into the public domain.
+set -ex
+
+PREFIX="${PREFIX:-$(gcc -print-sysroot)}"
+
+cp src/pcre2.h.generic src/pcre2.h
+${CC:-cc} -c -fwhole-program ${CFLAGS:--Os} "$0"
+${STRIP:-strip} -x libregex.o
+
+mkdir -p "$PREFIX/lib"
+rm -f "$PREFIX/lib/libregex.a"
+${AR:-ar} -r "$PREFIX/lib/libregex.a" libregex.o
+
+mkdir -p "$PREFIX/include"
+tee >nul $PREFIX/include/regex.h <<EOF
+#pragma once
+#include <stddef.h>
+
+enum {
+    REG_EXTENDED = 0x0000,
+    REG_ICASE    = 0x0001,
+    REG_NEWLINE  = 0x0002,
+    REG_NOTBOL   = 0x0004,
+    REG_NOTEOL   = 0x0008,
+    REG_DOTALL   = 0x0010,
+    REG_NOSUB    = 0x0020,
+    REG_UTF      = 0x0040,
+    REG_STARTEND = 0x0080,
+    REG_NOTEMPTY = 0x0100,
+    REG_UNGREEDY = 0x0200,
+    REG_UCP      = 0x0400,
+    REG_PEND     = 0x0800,
+    REG_NOSPEC   = 0x1000,
+};
+
+enum {
+    REG_ASSERT = 1,
+    REG_BADBR,
+    REG_BADPAT,
+    REG_BADRPT,
+    REG_EBRACE,
+    REG_EBRACK,
+    REG_ECOLLATE,
+    REG_ECTYPE,
+    REG_EESCAPE,
+    REG_EMPTY,
+    REG_EPAREN,
+    REG_ERANGE,
+    REG_ESIZE,
+    REG_ESPACE,
+    REG_ESUBREG,
+    REG_INVARG,
+    REG_NOMATCH,
+};
+
+typedef struct {
+    void  *re_pcre2_code;
+    void  *re_match_data;
+    char  *re_endp;
+    size_t re_nsub;
+    size_t re_erroffset;
+    int    re_cflags;
+} regex_t;
+
+typedef int regoff_t;
+
+typedef struct {
+    regoff_t rm_so;
+    regoff_t rm_eo;
+} regmatch_t;
+
+int    regcomp(regex_t *, const char *, int);
+size_t regerror(int, const regex_t *, char *, size_t);
+int    regexec(const regex_t *, const char *, size_t, regmatch_t *, int);
+void   regfree(regex_t *);
+EOF
+exit 0
+#endif
+
+#define PCRE2_EXP_DEFN          static
+#define PCRE2_EXP_DECL          static
+#define PCRE2POSIX_EXP_DECL
+#define PCRE2POSIX_EXP_DEFN     __attribute((used))
+
+#define HAVE_BUILTIN_MUL_OVERFLOW
+#define HAVE_MEMMOVE
+#define HEAP_LIMIT              20000000
+#define LINK_SIZE               2
+#define MATCH_LIMIT		        10000000
+#define MATCH_LIMIT_DEPTH	    MATCH_LIMIT
+#define MAX_NAME_COUNT	        10000
+#define MAX_NAME_SIZE	        32
+#define MAX_VARLOOKBEHIND       255
+#define NEWLINE_DEFAULT         2
+#define PARENS_NEST_LIMIT       250
+#define PCRE2_CODE_UNIT_WIDTH   8
+#define PCRE2_STATIC
+#define SUPPORT_UNICODE
+
+#include "src/pcre2posix.h"
+#undef  regcomp
+#undef  regexec
+#undef  regerror
+#undef  regfree
+#define pcre2_regcomp   regcomp
+#define pcre2_regexec   regexec
+#define pcre2_regerror  regerror
+#define pcre2_regfree   regfree
+#include "src/pcre2posix.c"
+
+#include "src/pcre2_auto_possess.c"
+#include "src/pcre2_chartables.c.dist"
+#include "src/pcre2_chkdint.c"
+#include "src/pcre2_compile.c"
+#include "src/pcre2_context.c"
+#include "src/pcre2_extuni.c"
+#include "src/pcre2_find_bracket.c"
+#include "src/pcre2_match.c"
+#include "src/pcre2_match_data.c"
+#include "src/pcre2_newline.c"
+#include "src/pcre2_ord2utf.c"
+#include "src/pcre2_pattern_info.c"
+#include "src/pcre2_script_run.c"
+#include "src/pcre2_string_utils.c"
+#include "src/pcre2_study.c"
+#include "src/pcre2_tables.c"
+#include "src/pcre2_ucd.c"
+#include "src/pcre2_valid_utf.c"
+#include "src/pcre2_xclass.c"