From bddb3885b6790b3f4620d15c5defc9ac55e719af Mon Sep 17 00:00:00 2001
From: anon <anon@anon.anon>
Date: Thu, 24 Aug 2023 21:08:31 +0200
Subject: [PATCH] HOOK_ALL is no longer a macro

---
 source/regex.c | 62 ++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 43 insertions(+), 19 deletions(-)

diff --git a/source/regex.c b/source/regex.c
index 1c1f7ea..449e1df 100644
--- a/source/regex.c
+++ b/source/regex.c
@@ -48,6 +48,15 @@ typedef struct {
 	int to;
 } offshoot_t;
 
+typedef struct {
+	bool    * do_catch;
+	bool    * is_negative;
+	int     * state;
+	int     * width;
+	char    * whitelist;
+	regex_t * regex;
+} compiler_state;
+
 
 
 // ----------------------------------
@@ -317,19 +326,24 @@ static bool catch_(const regex_t * const regex,
 
 #define HALT_AND_CATCH_FIRE -1
 
-#define HOOK_ALL(from, str, to) do {                      \
-	int hook_to = (is_negative) ? -1 : state + to;        \
-	for (char * s = str; *s != '\0'; s++) {               \
-		vector_push(&regex->delta_table,                  \
-			&(delta_t){state + from, *s, hook_to, width}  \
-		);                                                \
-	}                                                     \
-	if (do_catch || is_negative) {                        \
-		vector_push(&regex->catch_table,                  \
-			&(offshoot_t){state + from, hook_to}          \
-		);                                                \
-	}                                                     \
-} while (0)
+void HOOK_ALL(      int              from,
+                     const char * const      str,
+                           int                to,
+						   compiler_state *   cs) {
+
+	int hook_to = (*cs->is_negative) ? HALT_AND_CATCH_FIRE : *cs->state + to;
+
+	for (const char * s = str; *s != '\0'; s++) {
+		vector_push(&cs->regex->delta_table,
+			&(delta_t){*cs->state + from, *s, hook_to, *cs->width}
+		);
+	}
+	if (cs->do_catch || cs->is_negative) {
+		vector_push(&cs->regex->catch_table,
+			&(offshoot_t){*cs->state + from, hook_to}
+		);
+	}
+}
 
 #define EAT(n) do { \
 	s += n;         \
@@ -343,10 +357,20 @@ regex_t * regex_compile(const char * const pattern) {
 
 	int state = 0;
 
-	char whitelist[64];
 	bool do_catch;
 	bool is_negative;
 	int width;
+	char whitelist[64];
+
+	compiler_state cs = {
+		.do_catch    = &do_catch,
+		.is_negative = &is_negative,
+		.state       = &state,
+		.width       = &width,
+		.whitelist   = whitelist,
+		.regex       = regex,
+	};
+
 	for (const char * s = pattern; *s != '\00';) {
 		// Get token
 		assert(!is_quantifier(*pattern) && "Pattern starts with quantifier.");
@@ -385,21 +409,21 @@ regex_t * regex_compile(const char * const pattern) {
 		switch (*s) {
 			case '=':
 			case '?': {
-				HOOK_ALL(0, whitelist, +1);
+				HOOK_ALL(0, whitelist, +1, &cs);
 				EAT(1);
 			} break;
 			case '*': {
-				HOOK_ALL(0, whitelist,  0);
+				HOOK_ALL(0, whitelist,  0, &cs);
 				EAT(1);
 			} break;
 			case '+': {
-				HOOK_ALL(0, whitelist, +1);
+				HOOK_ALL(0, whitelist, +1, &cs);
 				state += 1;
-				HOOK_ALL(0, whitelist,  0);
+				HOOK_ALL(0, whitelist,  0, &cs);
 				EAT(1);
 			} break;
 			default: { // Literal
-				HOOK_ALL(0, whitelist, +1);
+				HOOK_ALL(0, whitelist, +1, &cs);
 				state += 1;
 			} break;
 		}