From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/vlib/regex/regex_opt.v | 53 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 v_windows/v/vlib/regex/regex_opt.v

(limited to 'v_windows/v/vlib/regex/regex_opt.v')

diff --git a/v_windows/v/vlib/regex/regex_opt.v b/v_windows/v/vlib/regex/regex_opt.v
new file mode 100644
index 0000000..2aaa88f
--- /dev/null
+++ b/v_windows/v/vlib/regex/regex_opt.v
@@ -0,0 +1,53 @@
+module regex
+
+import strings
+
+// compile_opt compile RE pattern string
+pub fn (mut re RE) compile_opt(pattern string) ? {
+	re_err, err_pos := re.impl_compile(pattern)
+
+	if re_err != compile_ok {
+		mut err_msg := strings.new_builder(300)
+		err_msg.write_string('\nquery: $pattern\n')
+		line := '-'.repeat(err_pos)
+		err_msg.write_string('err  : $line^\n')
+		err_str := re.get_parse_error_string(re_err)
+		err_msg.write_string('ERROR: $err_str\n')
+		return error_with_code(err_msg.str(), re_err)
+	}
+}
+
+// new_regex create a RE of small size, usually sufficient for ordinary use
+pub fn new() RE {
+	// init regex
+	mut re := RE{}
+	re.prog = []Token{len: max_code_len + 1} // max program length, can not be longer then the pattern
+	re.cc = []CharClass{len: max_code_len} // can not be more char class the the length of the pattern
+	re.group_csave_flag = false // enable continuos group saving
+	re.group_max_nested = 128 // set max 128 group nested
+	re.group_max = max_code_len >> 1 // we can't have more groups than the half of the pattern legth
+
+	re.group_stack = []int{len: re.group_max, init: -1}
+	re.group_data = []int{len: re.group_max, init: -1}
+
+	return re
+}
+
+// regex_opt create new RE object from RE pattern string
+pub fn regex_opt(pattern string) ?RE {
+	// init regex
+	mut re := RE{}
+	re.prog = []Token{len: pattern.len + 1} // max program length, can not be longer then the pattern
+	re.cc = []CharClass{len: pattern.len} // can not be more char class the the length of the pattern
+	re.group_csave_flag = false // enable continuos group saving
+	re.group_max_nested = 128 // set max 128 group nested
+	re.group_max = pattern.len >> 1 // we can't have more groups than the half of the pattern legth
+
+	re.group_stack = []int{len: re.group_max, init: -1}
+	re.group_data = []int{len: re.group_max, init: -1}
+
+	// compile the pattern
+	re.compile_opt(pattern) ?
+
+	return re
+}
-- 
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