From 207df6fc406e81bfeebdff7f404bd242ff3f099f Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 7 May 2024 06:48:35 +0200
Subject: Merging upstream version 0.12.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/file_format.cc | 78 +++++++++++++-----------------------------------------
 1 file changed, 18 insertions(+), 60 deletions(-)

(limited to 'src/file_format.cc')

diff --git a/src/file_format.cc b/src/file_format.cc
index d82b78c..9858c26 100644
--- a/src/file_format.cc
+++ b/src/file_format.cc
@@ -29,8 +29,6 @@
  * @file file_format.hh
  */
 
-#include <unordered_map>
-
 #include "file_format.hh"
 
 #include "archive_manager.hh"
@@ -40,77 +38,37 @@
 #include "base/lnav_log.hh"
 #include "config.h"
 
-static bool
-is_pcap_header(uint8_t* buffer)
-{
-    size_t offset = 0;
-    if (buffer[0] == 0x0a && buffer[1] == 0x0d && buffer[2] == 0x0d
-        && buffer[3] == 0x0a)
-    {
-        offset += sizeof(uint32_t) * 2;
-        if (buffer[offset + 0] == 0x1a && buffer[offset + 1] == 0x2b
-            && buffer[offset + 2] == 0x3c && buffer[offset + 3] == 0x4d)
-        {
-            return true;
-        }
-
-        if (buffer[offset + 0] == 0x4d && buffer[offset + 1] == 0x3c
-            && buffer[offset + 2] == 0x2b && buffer[offset + 3] == 0x1a)
-        {
-            return true;
-        }
-        return false;
-    }
-
-    if (buffer[0] == 0xa1 && buffer[1] == 0xb2 && buffer[2] == 0xc3
-        && buffer[3] == 0xd4)
-    {
-        return true;
-    }
-
-    if (buffer[0] == 0xd4 && buffer[1] == 0xc3 && buffer[2] == 0xb2
-        && buffer[3] == 0xa1)
-    {
-        return true;
-    }
-
-    if (buffer[0] == 0xa1 && buffer[1] == 0xb2 && buffer[2] == 0x3c
-        && buffer[3] == 0x4d)
-    {
-        return true;
-    }
-
-    if (buffer[0] == 0x4d && buffer[1] == 0x3c && buffer[2] == 0xb2
-        && buffer[3] == 0xa1)
-    {
-        return true;
-    }
-
-    return false;
-}
-
 file_format_t
 detect_file_format(const ghc::filesystem::path& filename)
 {
-    if (archive_manager::is_archive(filename)) {
+    auto describe_res = archive_manager::describe(filename);
+    if (describe_res.isOk()
+        && describe_res.unwrap().is<archive_manager::archive_info>())
+    {
         return file_format_t::ARCHIVE;
     }
 
     file_format_t retval = file_format_t::UNKNOWN;
-    auto_fd fd;
-
-    if ((fd = lnav::filesystem::openp(filename, O_RDONLY)) != -1) {
+    auto open_res = lnav::filesystem::open_file(filename, O_RDONLY);
+    if (open_res.isErr()) {
+        log_error("unable to open file for format detection: %s -- %s",
+                  filename.c_str(),
+                  open_res.unwrapErr().c_str());
+    } else {
+        auto fd = open_res.unwrap();
         uint8_t buffer[32];
-        ssize_t rc;
+        auto rc = read(fd, buffer, sizeof(buffer));
 
-        if ((rc = read(fd, buffer, sizeof(buffer))) > 0) {
+        if (rc < 0) {
+            log_error("unable to read file for format detection: %s -- %s",
+                      filename.c_str(),
+                      strerror(errno));
+        } else {
             static auto SQLITE3_HEADER = "SQLite format 3";
-            auto header_frag = string_fragment(buffer, 0, rc);
+            auto header_frag = string_fragment::from_bytes(buffer, rc);
 
             if (header_frag.startswith(SQLITE3_HEADER)) {
                 retval = file_format_t::SQLITE_DB;
-            } else if (rc > 24 && is_pcap_header(buffer)) {
-                retval = file_format_t::PCAP;
             }
         }
     }
-- 
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