From 068e1f43584b39e2044ff44c7491c7047d05f202 Mon Sep 17 00:00:00 2001
From: liestrela <estrela@riseup.net>
Date: Sun, 27 Oct 2024 16:07:53 -0300
Subject: [PATCH] Fix if_match comparison for string operands containing
 operator symbols (#1988)

---
 src/algebra.cc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/algebra.cc b/src/algebra.cc
index 3e69294e..c3ac1e21 100644
--- a/src/algebra.cc
+++ b/src/algebra.cc
@@ -40,9 +40,15 @@
  * returns the index of the first op character or -1 on error
  */
 int find_match_op(const char *expr) {
-  unsigned int idx;
+  unsigned int idx = 0;
 
-  for (idx = 0; idx < strlen(expr); idx++) {
+  /* if first operand is a string, skip it */
+  if (expr[idx] == '"') {
+    for (idx=1; expr[idx] && expr[idx] != '"'; idx++);
+    idx++;
+  }
+
+  for (; idx < strlen(expr); idx++) {
     switch (expr[idx]) {
       case '=':
       case '!':