From 94421639b0bb61dc14ea39028ee66c84e26814a7 Mon Sep 17 00:00:00 2001
From: Thomas Voss <mail@thomasvoss.com>
Date: Thu, 18 Jan 2024 01:18:48 +0100
Subject: Add optional PCRE support

---
 make.c     |  9 ++++++++-
 src/grab.c | 14 +++++++++-----
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/make.c b/make.c
index ce566af..823eb3f 100644
--- a/make.c
+++ b/make.c
@@ -33,6 +33,8 @@ static char *_mkoutpath(const char **, size_t);
 #define mkoutpath(...) \
 	_mkoutpath((const char **)_vtoa(__VA_ARGS__), lengthof(_vtoa(__VA_ARGS__)))
 
+static bool pflag;
+
 int
 main(int argc, char **argv)
 {
@@ -43,11 +45,14 @@ main(int argc, char **argv)
 	cbsinit(argc, argv);
 	rebuild();
 
-	while ((opt = getopt(argc, argv, "d")) != -1) {
+	while ((opt = getopt(argc, argv, "dp")) != -1) {
 		switch (opt) {
 		case 'd':
 			debug = true;
 			break;
+		case 'p':
+			pflag = true;
+			break;
 		default:
 			fputs("Usage: make [-d]\n", stderr);
 			exit(EXIT_FAILURE);
@@ -83,6 +88,8 @@ main(int argc, char **argv)
 #ifdef CBS_IS_C23
 				cmdadd(&c, "-DGRAB_IS_C23=1");
 #endif
+				if (pflag)
+					cmdadd(&c, "-DGRAB_DO_PCRE=1", "-lpcre2-posix");
 				if (debug)
 					cmdadd(&c, CFLAGS_DEBUG);
 				else
diff --git a/src/grab.c b/src/grab.c
index f04f75f..5695226 100644
--- a/src/grab.c
+++ b/src/grab.c
@@ -3,7 +3,6 @@
 #include <libgen.h>
 #include <limits.h>
 #include <locale.h>
-#include <regex.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -14,12 +13,17 @@
 #	define nullptr NULL
 #endif
 
-#include "da.h"
-
-#ifndef REG_STARTEND
-#	error "REG_STARTEND not defined"
+#if GRAB_DO_PCRE
+#	include <pcre2posix.h>
+#else
+#	include <regex.h>
+#	ifndef REG_STARTEND
+#		error "REG_STARTEND not defined"
+#	endif
 #endif
 
+#include "da.h"
+
 #define die(...)  err(EXIT_FAILURE, __VA_ARGS__);
 #define diex(...) errx(EXIT_FAILURE, __VA_ARGS__);
 #define warn(...) \
-- 
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