File 0015-glib-Port-various-callers-to-use-g_utf8_validate_len.patch of Package glib2.23781

From 09d2f37e239c2305551483f20b24065c5f402787 Mon Sep 17 00:00:00 2001
From: Philip Withnall <withnall@endlessm.com>
Date: Thu, 4 Oct 2018 13:22:13 +0100
Subject: [PATCH 15/15] glib: Port various callers to use g_utf8_validate_len()
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These were callers which explicitly specified the string length to
g_utf8_validate(), when it couldn’t be negative, and hence should be
able to unconditionally benefit from the increased string handling
length.

At least one call site would have previously silently changed behaviour
if called with strings longer than G_MAXSSIZE in length.

Another call site was passing strlen(string) to g_utf8_validate(), which
seems pointless: just pass -1 instead, and let g_utf8_validate()
calculate the string length. Its behaviour on embedded nul bytes
wouldn’t change, as strlen() stops at the first one.

Signed-off-by: Philip Withnall <withnall@endlessm.com>
---
 gio/glocalfileinfo.c | 4 ++--
 glib/giochannel.c    | 2 +-
 glib/gmarkup.c       | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/gio/glocalfileinfo.c b/gio/glocalfileinfo.c
index f46d4d6db..57435d399 100644
--- a/gio/glocalfileinfo.c
+++ b/gio/glocalfileinfo.c
@@ -1028,7 +1028,7 @@ make_valid_utf8 (const char *name)
 {
   GString *string;
   const gchar *remainder, *invalid;
-  gint remaining_bytes, valid_bytes;
+  gsize remaining_bytes, valid_bytes;
   
   string = NULL;
   remainder = name;
@@ -1036,7 +1036,7 @@ make_valid_utf8 (const char *name)
   
   while (remaining_bytes != 0) 
     {
-      if (g_utf8_validate (remainder, remaining_bytes, &invalid)) 
+      if (g_utf8_validate_len (remainder, remaining_bytes, &invalid))
 	break;
       valid_bytes = invalid - remainder;
     
diff --git a/glib/giochannel.c b/glib/giochannel.c
index a73b24477..45178bf4a 100644
--- a/glib/giochannel.c
+++ b/glib/giochannel.c
@@ -2333,7 +2333,7 @@ reconvert:
 
               /* UTF-8, just validate, emulate g_iconv */
 
-              if (!g_utf8_validate (from_buf, try_len, &badchar))
+              if (!g_utf8_validate_len (from_buf, try_len, &badchar))
                 {
                   gunichar try_char;
                   gsize incomplete_len = from_buf + try_len - badchar;
diff --git a/glib/gmarkup.c b/glib/gmarkup.c
index 8998a3876..f5a356b8d 100644
--- a/glib/gmarkup.c
+++ b/glib/gmarkup.c
@@ -455,7 +455,7 @@ slow_name_validate (GMarkupParseContext  *context,
 {
   const gchar *p = name;
 
-  if (!g_utf8_validate (name, strlen (name), NULL))
+  if (!g_utf8_validate (name, -1, NULL))
     {
       set_error (context, error, G_MARKUP_ERROR_BAD_UTF8,
                  _("Invalid UTF-8 encoded text in name - not valid '%s'"), name);
@@ -538,7 +538,7 @@ text_validate (GMarkupParseContext  *context,
                gint                  len,
                GError              **error)
 {
-  if (!g_utf8_validate (p, len, NULL))
+  if (!g_utf8_validate_len (p, len, NULL))
     {
       set_error (context, error, G_MARKUP_ERROR_BAD_UTF8,
                  _("Invalid UTF-8 encoded text in name - not valid '%s'"), p);
-- 
2.41.0