From 6336bd5578e3d92f1ec34d10a96542ed429fdd21 Mon Sep 17 00:00:00 2001
From: Raghuram Subramani <raghus2247@gmail.com>
Date: Thu, 12 Jun 2025 21:35:23 +0530
Subject: lexer: parse strings

---
 src/lexer.cc | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'src/lexer.cc')

diff --git a/src/lexer.cc b/src/lexer.cc
index 50c815e..c77e11d 100644
--- a/src/lexer.cc
+++ b/src/lexer.cc
@@ -82,6 +82,35 @@ Lexer::match(char c)
   return true;
 }
 
+void
+Lexer::string(void)
+{
+  while (peek() != '"' && !at_end()) {
+    if (peek() == '\n')
+      m_line++;
+
+    advance();
+  }
+
+  if (at_end()) {
+    printf("[-] Error: Unterminated string in line %lu\n", m_line);
+    return;
+  }
+
+  int token_length = m_current - m_start - 1;
+  if (token_length == 0)
+    token_length++;
+
+  char *lexeme;
+  asprintf(&lexeme, "%.*s", token_length, m_script + m_start + 1);
+  Token token;
+  token.init(STRING, lexeme, m_line);
+  m_tokens->add(&token);
+  token.clean();
+
+  advance();
+}
+
 void
 Lexer::add_token(token_type_e type)
 {
@@ -147,6 +176,10 @@ Lexer::scan_token(void)
     add_token(match('=') ? GREATER_EQUAL : GREATER);
     break;
 
+  case '"':
+    string();
+    break;
+
   case '/':
     if (match('/'))
       while (peek() != '\n' && !at_end())
@@ -159,6 +192,11 @@ Lexer::scan_token(void)
     m_line++;
     break;
 
+  case ' ':
+  case '\r':
+  case '\t':
+    break;
+
   default:
     printf("[-] Error: Unexpected character %c in line %lu\n", c, m_line);
     m_errored = true;
-- 
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