refactor(preg): drop the offset argument from preg_match

Every call site but one passed offset 0. The remaining one, the UTF-8
chunking loop in Application, slices the subject instead: its pattern has
no anchor or lookaround, so matching a suffix is equivalent to starting
the search at that offset.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

2 files changed, 6 insertions, 7 deletions

diff --git a/crates/shirabe/src/util/http/curl_downloader.rs b/crates/shirabe/src/util/http/curl_downloader.rs
index 91165015..6754f784 100644
--- a/crates/shirabe/src/util/http/curl_downloader.rs
+++ b/crates/shirabe/src/util/http/curl_downloader.rs
@@ -32,7 +32,7 @@ use crate::util::http::Response;
 use crate::util::{AuthHelper, PromptAuthResult, StoreAuth};
 use indexmap::IndexMap;
 use shirabe_php_shim::{
-    PhpMixed, in_array_loose, in_array_strict, parse_url, php_regex, preg_match2, preg_quote,
+    PhpMixed, in_array_loose, in_array_strict, parse_url, php_regex, preg_match, preg_quote,
     preg_replace, rename, strpos, substr, unlink_silent,
 };
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -146,7 +146,7 @@ impl CurlDownloader {
 
         // check URL can be accessed (i.e. is not insecure), but allow insecure Packagist calls to
         // $hashed providers as file integrity is verified with sha256
-        if preg_match2(php_regex!(r"{^http://(repo\.)?packagist\.org/p/}"), url, 0).is_none()
+        if preg_match(php_regex!(r"{^http://(repo\.)?packagist\.org/p/}"), url).is_none()
             || (strpos(url, "$").is_none() && strpos(url, "%24").is_none())
         {
             self.config.borrow_mut().prohibit_url_by_config(
@@ -746,13 +746,12 @@ impl CurlDownloader {
             && substr(url, -4, None) == ".zip"
             && (location_header.is_none()
                 || substr(location_header.as_deref().unwrap_or(""), -4, None) != ".zip")
-            && preg_match2(
+            && preg_match(
                 php_regex!(r"{^text/html\b}i"),
                 &response
                     .inner
                     .get_header("content-type")
                     .unwrap_or_default(),
-                0,
             )
             .is_some()
         {
diff --git a/crates/shirabe/src/util/http/response.rs b/crates/shirabe/src/util/http/response.rs
index ed5c5214..6fe95200 100644
--- a/crates/shirabe/src/util/http/response.rs
+++ b/crates/shirabe/src/util/http/response.rs
@@ -1,7 +1,7 @@
 //! ref: composer/src/Composer/Util/Http/Response.php
 
 use crate::json::JsonFile;
-use shirabe_php_shim::{PhpMixed, php_regex, preg_match2, preg_quote};
+use shirabe_php_shim::{PhpMixed, php_regex, preg_match, preg_quote};
 
 #[derive(Debug)]
 pub struct Response {
@@ -28,7 +28,7 @@ impl Response {
     pub fn get_status_message(&self) -> Option<String> {
         let mut value = None;
         for header in &self.headers {
-            if preg_match2(php_regex!(r"{^HTTP/\S+ \d+}i"), header, 0).is_some() {
+            if preg_match(php_regex!(r"{^HTTP/\S+ \d+}i"), header).is_some() {
                 // In case of redirects, headers contain the headers of all responses
                 // so we can not return directly and need to keep iterating
                 value = Some(header.clone());
@@ -64,7 +64,7 @@ impl Response {
         let mut value = None;
         let pattern = format!("{{^{}:\\s*(.+?)\\s*$}}i", preg_quote(name, None));
         for header in headers {
-            if let Some(matches) = preg_match2(&pattern, header, 0)
+            if let Some(matches) = preg_match(&pattern, header)
                 && let Some(s) = matches.get(1)
             {
                 value = Some(s.to_string());