Fix casting warnings related to snprintf/vsnprintf

p4raw-id: //depot/perl@28459

diff --git a/perl.h b/perl.h
index 4921b73..3a762fa 100644 (file)
--- a/perl.h
+++ b/perl.h
@@ -1466,7 +1466,7 @@ int sockatmark(int);
 
 #if defined(HAS_SNPRINTF) && defined(HAS_C99_VARIADIC_MACROS) && !(defined(DEBUGGING) && !defined(PERL_USE_GCC_BRACE_GROUPS))
 #  ifdef PERL_USE_GCC_BRACE_GROUPS
-#      define my_snprintf(buffer, len, ...) ({ int __len__ = snprintf(buffer, len, __VA_ARGS__); if ((len) > 0 && __len__ >= (len)) Perl_croak(aTHX_ "panic: snprintf buffer overflow"); __len__; })
+#      define my_snprintf(buffer, len, ...) ({ int __len__ = snprintf(buffer, len, __VA_ARGS__); if ((len) > 0 && (Size_t)__len__ >= (len)) Perl_croak(aTHX_ "panic: snprintf buffer overflow"); __len__; })
 #      define PERL_MY_SNPRINTF_GUARDED
 #  else
 #    define my_snprintf(buffer, len, ...) snprintf(buffer, len, __VA_ARGS__)
@@ -1478,7 +1478,7 @@ int sockatmark(int);
 
 #if defined(HAS_VSNPRINTF) && defined(HAS_C99_VARIADIC_MACROS) && !(defined(DEBUGGING) && !defined(PERL_USE_GCC_BRACE_GROUPS))
 #  ifdef PERL_USE_GCC_BRACE_GROUPS
-#      define my_vsnprintf(buffer, len, ...) ({ int __len__ = vsnprintf(buffer, len, __VA_ARGS__); if ((len) > 0 && __len__ >= (len)) Perl_croak(aTHX_ "panic: vsnprintf buffer overflow"); __len__; })
+#      define my_vsnprintf(buffer, len, ...) ({ int __len__ = vsnprintf(buffer, len, __VA_ARGS__); if ((len) > 0 && (Size_t)__len__ >= (len)) Perl_croak(aTHX_ "panic: vsnprintf buffer overflow"); __len__; })
 #      define PERL_MY_VSNPRINTF_GUARDED
 #  else
 #    define my_vsnprintf(buffer, len, ...) vsnprintf(buffer, len, __VA_ARGS__)

diff --git a/util.c b/util.c
index 07dd4d4..cecec9c 100644 (file)
--- a/util.c
+++ b/util.c
@@ -5393,7 +5393,7 @@ Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...)
 #endif
     va_end(ap);
     /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
-    if (retval < 0 || (len > 0 && retval >= len))
+    if (retval < 0 || (len > 0 && (Size_t)retval >= len))
        Perl_croak(aTHX_ "panic: my_snprintf buffer overflow");
     return retval;
 }
@@ -5430,7 +5430,7 @@ Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap
 # endif
 #endif /* #ifdef NEED_VA_COPY */
     /* vsnprintf() shows failure with >= len, vsprintf() with < 0 */
-    if (retval < 0 || (len > 0 && retval >= len))
+    if (retval < 0 || (len > 0 && (Size_t)retval >= len))
        Perl_croak(aTHX_ "panic: my_vsnprintf buffer overflow");
     return retval;
 }