From b5b12171e1e710f90258dc5237069b1010e14c96 Mon Sep 17 00:00:00 2001
From: Stephen Seo <seo.disparate@gmail.com>
Date: Fri, 29 Nov 2024 12:10:17 +0900
Subject: [PATCH] Fix indexing in `IF`

Expressions like `{{{!IF SomeVar[2]==true}}}` should work properly now.
---
 example_config/example.config | 23 +++++++++++++++++++++++
 src/http_template.c           |  6 ++++--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/example_config/example.config b/example_config/example.config
index 9e911c7..b7328bd 100644
--- a/example_config/example.config
+++ b/example_config/example.config
@@ -36,6 +36,29 @@ HTML='''
     {{{!ENDIF}}}
 {{{!ENDFOREACH}}}
 
+Again with IFs:<br>
+
+{{{!IF EachIfTest_Array[0]==true}}}
+        EachIfTest_Array entry is <b>true</b>. <br>
+{{{!ELSE}}}
+        EachIfTest_Array entry is <b>false</b>. <br>
+{{{!ENDIF}}}
+{{{!IF EachIfTest_Array[1]==true}}}
+        EachIfTest_Array entry is <b>true</b>. <br>
+{{{!ELSE}}}
+        EachIfTest_Array entry is <b>false</b>. <br>
+{{{!ENDIF}}}
+{{{!IF EachIfTest_Array[2]==true}}}
+        EachIfTest_Array entry is <b>true</b>. <br>
+{{{!ELSE}}}
+        EachIfTest_Array entry is <b>false</b>. <br>
+{{{!ENDIF}}}
+{{{!IF EachIfTest_Array[3]==true}}}
+        EachIfTest_Array entry is <b>true</b>. <br>
+{{{!ELSE}}}
+        EachIfTest_Array entry is <b>false</b>. <br>
+{{{!ENDIF}}}
+
 <br>
 <h2>Test IF/FOREACH Expr</h2>
 
diff --git a/src/http_template.c b/src/http_template.c
index 6d0cb57..ef17aeb 100644
--- a/src/http_template.c
+++ b/src/http_template.c
@@ -229,10 +229,12 @@ int c_simple_http_internal_parse_if_expression(
         fprintf(stderr, "ERROR No closing \"]\"! %s\n", var);
         return 1;
       } else if (
-          idx + 1 < var_size && var[idx] == '!' && var[idx + 1] == '=') {
+          idx + 2 < var_size && var[idx + 1] == '!' && var[idx + 2] == '=') {
+        ++idx;
         break;
       } else if (
-          idx + 1 < var_size && var[idx] == '=' && var[idx + 1] == '=') {
+          idx + 2 < var_size && var[idx + 1] == '=' && var[idx + 2] == '=') {
+        ++idx;
         break;
       } else {
         fprintf(stderr, "ERROR Invalid expression after \"]\"! %s\n", var);