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>

1 files changed, 4 insertions, 7 deletions

diff --git a/crates/shirabe/src/platform/version.rs b/crates/shirabe/src/platform/version.rs
index baa029ef..b9573366 100644
--- a/crates/shirabe/src/platform/version.rs
+++ b/crates/shirabe/src/platform/version.rs
@@ -1,6 +1,6 @@
 //! ref: composer/src/Composer/Platform/Version.php
 
-use shirabe_php_shim::{CmpOp, php_regex, preg_match2, version_compare};
+use shirabe_php_shim::{CmpOp, php_regex, preg_match, version_compare};
 
 pub struct Version;
 
@@ -8,12 +8,11 @@ impl Version {
     pub fn parse_openssl(openssl_version: &str, is_fips: &mut bool) -> Option<String> {
         *is_fips = false;
 
-        let matches = preg_match2(
+        let matches = preg_match(
             php_regex!(
                 r"/^(?P<version>[0-9.]+)(?P<patch>[a-z]{0,2})(?P<suffix>(?:-?(?:dev|pre|alpha|beta|rc|fips)[\d]*)*)(?:-\w+)?(?: \(.+?\))?$/"
             ),
             openssl_version,
-            0,
         )?;
 
         let version = matches.name("version").unwrap_or_default().to_string();
@@ -42,10 +41,9 @@ impl Version {
     }
 
     pub fn parse_libjpeg(libjpeg_version: &str) -> Option<String> {
-        let matches = preg_match2(
+        let matches = preg_match(
             php_regex!(r"/^(?P<major>\d+)(?P<minor>[a-z]*)$/"),
             libjpeg_version,
-            0,
         )?;
 
         let major = matches.name("major").unwrap_or_default().to_string();
@@ -58,10 +56,9 @@ impl Version {
     }
 
     pub fn parse_zoneinfo_version(zoneinfo_version: &str) -> Option<String> {
-        let matches = preg_match2(
+        let matches = preg_match(
             php_regex!(r"/^(?P<year>\d{4})(?P<revision>[a-z]*)$/"),
             zoneinfo_version,
-            0,
         )?;
 
         let year = matches.name("year").unwrap_or_default().to_string();