From 5c5866fc3051716e993915fa3f8ee34ce4343158 Mon Sep 17 00:00:00 2001
From: nishi <nishi@0f02c867-ac3d-714e-8a88-971ba1f6efcf>
Date: Sun, 5 May 2024 16:46:44 +0000
Subject: [PATCH] if works

git-svn-id: file:///raid/svn-main/nishi-serenade/trunk@111 0f02c867-ac3d-714e-8a88-971ba1f6efcf
---
 Serenade/interpreter.c | 14 +++++++-------
 Serenade/run.c         | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 7 deletions(-)

diff --git a/Serenade/interpreter.c b/Serenade/interpreter.c
index 4cc8375..d47d6a6 100644
--- a/Serenade/interpreter.c
+++ b/Serenade/interpreter.c
@@ -119,23 +119,23 @@ struct sn_generic* condn_handler(struct sn_interpreter* sn, int args, struct sn_
 		gen->number = -1;
 	} else {
 		int i;
-		for(i = 1; i < args; i++){
-			if(gens[i]->type != SN_TYPE_DOUBLE){
+		for(i = 1; i < args; i++) {
+			if(gens[i]->type != SN_TYPE_DOUBLE) {
 				gen->number = -1;
 				return gen;
 			}
 		}
 		if(strcmp(gens[0]->name, "or") == 0) {
-			for(i = 1; i < args; i++){
-				if(gens[i]->number != 0){
+			for(i = 1; i < args; i++) {
+				if(gens[i]->number != 0) {
 					gen->number = 1;
 					break;
 				}
 			}
-		}else if(strcmp(gens[0]->name, "and") == 0) {
+		} else if(strcmp(gens[0]->name, "and") == 0) {
 			gen->number = 1;
-			for(i = 1; i < args; i++){
-				if(gens[i]->number == 0){
+			for(i = 1; i < args; i++) {
+				if(gens[i]->number == 0) {
 					gen->number = 0;
 					break;
 				}
diff --git a/Serenade/run.c b/Serenade/run.c
index 670a508..a32031e 100644
--- a/Serenade/run.c
+++ b/Serenade/run.c
@@ -146,6 +146,47 @@ struct sn_generic* _sn_run(struct sn_interpreter* sn, struct sn_generic* gen) {
 					goto do_loop;
 				}
 				return r;
+			} else if(strcmp(op->name, "if") == 0) {
+				int i;
+				for(i = 0; gen->tree->args[i] != NULL; i++)
+					;
+				if(i < 2) {
+					fprintf(stderr, "Insufficient arguments\n");
+					free(r);
+					return NULL;
+				}
+				struct sn_interpreter_kv** old_kv = sn->local_variables;
+				sn->local_variables = malloc(sizeof(struct sn_interpreter_kv*));
+				sn->local_variables[0] = NULL;
+
+				struct sn_generic* cond = _sn_run(sn, gen->tree->args[1]);
+				if(cond == NULL) {
+					free(r);
+					return NULL;
+				}
+
+				free(sn->local_variables);
+				sn->local_variables = old_kv;
+
+				r->type = SN_TYPE_VOID;
+
+				if(cond->type != SN_TYPE_DOUBLE) {
+					fprintf(stderr, "Cannot use non-number (Type %d) for loop condition\n", r->type);
+					free(r);
+					return NULL;
+				} else if(cond->number != 0) {
+					old_kv = sn->local_variables;
+					sn->local_variables = malloc(sizeof(struct sn_interpreter_kv*));
+					sn->local_variables[0] = NULL;
+
+					for(i = 2; gen->tree->args[i] != NULL; i++) {
+						_sn_run(sn, gen->tree->args[i]);
+					}
+
+					free(sn->local_variables);
+					sn->local_variables = old_kv;
+				}
+				return r;
 			}
 			bool called = false;
 			int j;
-- 
2.43.0