From 56157c6dbf961d69d1a91a39723d0c68f8f81e82 Mon Sep 17 00:00:00 2001
From: Dmitry Mikhirev
Date: Fri, 14 Nov 2014 18:22:10 +0300
Subject: added options handling, various fixes

---
 GNUmakefile | 34 +++++++++++++++++++++++++---------
 pcre.c      | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 77 insertions(+), 15 deletions(-)

diff --git a/GNUmakefile b/GNUmakefile
index 91d3616..654e76e 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1,17 +1,33 @@
--load pcre.so
-
 MAKE_INCLUDE_DIR := $(HOME)/src/make-4.1
 CFLAGS += -I$(MAKE_INCLUDE_DIR)
 
+tests = test001 test002
+
+-load pcre.so
+
+.PHONY: check $(tests) clean
+
 pcre.so: CFLAGS += $(shell pcre-config --cflags)
 pcre.so: LDFLAGS += $(shell pcre-config --libs)
 pcre.so: pcre.c
 	$(CC) $(CFLAGS) -fPIC $(LDFLAGS) -shared -o $@ $<
 
-ifeq ($(m ^pattern$,pattern), pattern)
-check:
-	@echo test PASSED
-else
-check:
-	@echo test FAILED
-endif
+check: $(tests)
+
+test001:
+	@if [ '$(m ^test$,test)' = test ] ; then \
+	  echo '$@ PASSED'; \
+	else \
+	  echo '$@ FAILED'; \
+	fi
+
+test002: var = st
+test002:
+	@if [ '$(m ^te$(var)$$,test,e)' = test ] ; then \
+	  echo '$@ PASSED'; \
+	else \
+	  echo '$@ FAILED'; \
+	fi
+
+clean:
+	$(RM) *.o *.so
diff --git a/pcre.c b/pcre.c
index d8129ef..ac09257 100644
--- a/pcre.c
+++ b/pcre.c
@@ -10,33 +10,79 @@ const int MAX_CAP = 256;
 
 char *match(const char *name, int argc, char **argv)
 {
+	char *pat = NULL;
+	char *p;
+	int co = 0;
 	pcre *re;
 	const char *err;
 	int erroffset;
+	char *str;
 	int ncap = 0;
 	int ovec[MAX_CAP*3];
 	char *retstr = NULL;
 
-	re = pcre_compile(argv[0], 0, &err, &erroffset, NULL);
-	if (err != NULL) {
+	if (argc > 2) {
+		for (p = argv[2]; *p != '\0'; p++) {
+			switch (*p) {
+			case 'e':
+				pat = gmk_expand(argv[0]);
+				break;
+			case 'm':
+				co |= PCRE_MULTILINE;
+				break;
+			case 's':
+				co |= PCRE_DOTALL;
+				break;
+			case 'u':
+				co |= PCRE_UCP;
+				break;
+			case 'U':
+				co |= PCRE_UNGREEDY;
+				break;
+			case 'x':
+				co |= PCRE_EXTENDED;
+				break;
+			case 'X':
+				co |= PCRE_EXTRA;
+				break;
+			case '8':
+				co |= PCRE_UTF8;
+				break;
+			default:
+				fprintf(stderr, "%s: unknown option `%c'\n",
+						name, *p);
+				break;
+			}
+		}
+	}
+
+	if (pat == NULL) {
+		re = pcre_compile(argv[0], 0, &err, &erroffset, NULL);
+	} else {
+		re = pcre_compile(pat, 0, &err, &erroffset, NULL);
+	}
+	if (re == NULL) {
 		fprintf(stderr, "%s: %d: %s\n", name, erroffset, err);
 		goto end_match;
 	}
 
-	ncap = pcre_exec(re, NULL, argv[1], strlen(argv[1]), 0, 0, ovec, MAX_CAP*3);
+	str = gmk_expand(argv[1]);
+
+	ncap = pcre_exec(re, NULL, str, strlen(str), 0, 0, ovec, MAX_CAP*3);
+	pcre_free(re);
 
 end_match:
 	if (ncap) {
 		int len = ovec[1] - ovec[0];
 		retstr = gmk_alloc(len + 1);
-		strncpy(retstr, argv[1] + ovec[0], len);
-		retstr[len + 1] = '\0';
+		strncpy(retstr, str + ovec[0], len);
+		retstr[len] = '\0';
 	}
 	return retstr;
 }
 
 int pcre_gmk_setup()
 {
-	gmk_add_function("m", (gmk_func_ptr)match, 2, 2, GMK_FUNC_NOEXPAND);
+	gmk_add_function("m", (gmk_func_ptr)match, 2, 3, GMK_FUNC_NOEXPAND);
 	return 1;
 }
-- 
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