This patch to libiberty adds support for strnlen if it is not already
present.
I rebuilt the Makefile dependencies. This revealed that maint-tool
wasn't recognizing that files that include dwarf2.h also depend on
dwarf2.def, so I fixed maint-tool.
I also rebuilt functions.texi, which had not been rebuilt for a while.
Bootstrapped on x86_64-unknown-linux-gnu, where, as expected, the
function was not compiled.
Ian
2012-09-18 Ian Lance Taylor <i...@google.com>
* strnlen.c: New file.
* configure.ac: Check for strnlen, add it to AC_LIBOBJ if it's not
present.
* Makefile.in: Rebuild dependencies.
(CFILES): Add strnlen.c.
(CONFIGURED_OFILES): Add ./strnlen.$(objext).
* configure, config.in, functions.texi: Rebuild.
* maint-tool: Accept .def files in the include directory.
Index: configure.ac
===================================================================
--- configure.ac (revision 191430)
+++ configure.ac (working copy)
@@ -322,6 +322,7 @@ funcs="$funcs strchr"
funcs="$funcs strdup"
funcs="$funcs strncasecmp"
funcs="$funcs strndup"
+funcs="$funcs strnlen"
funcs="$funcs strrchr"
funcs="$funcs strstr"
funcs="$funcs strtod"
@@ -362,8 +363,8 @@ if test "x" = "y"; then
random realpath rename rindex \
sbrk setenv setproctitle setrlimit sigsetmask snprintf spawnve spawnvpe \
stpcpy stpncpy strcasecmp strchr strdup \
- strerror strncasecmp strndup strrchr strsignal strstr strtod strtol \
- strtoul strverscmp sysconf sysctl sysmp \
+ strerror strncasecmp strndup strnlen strrchr strsignal strstr strtod \
+ strtol strtoul strverscmp sysconf sysctl sysmp \
table times tmpnam \
vasprintf vfprintf vprintf vsprintf \
wait3 wait4 waitpid)
@@ -442,13 +443,14 @@ if test -n "${with_target_subdir}"; then
AC_LIBOBJ([stpcpy])
AC_LIBOBJ([stpncpy])
AC_LIBOBJ([strndup])
+ AC_LIBOBJ([strnlen])
AC_LIBOBJ([strverscmp])
AC_LIBOBJ([vasprintf])
AC_LIBOBJ([waitpid])
for f in $funcs; do
case "$f" in
- asprintf | basename | bcmp | bcopy | bzero | clock | ffs | getpagesize | index | insque | mempcpy | mkstemps | random | rindex | sigsetmask | stpcpy | stpncpy | strdup | strndup | strverscmp | vasprintf | waitpid)
+ asprintf | basename | bcmp | bcopy | bzero | clock | ffs | getpagesize | index | insque | mempcpy | mkstemps | random | rindex | sigsetmask | stpcpy | stpncpy | strdup | strndup | strnlen | strverscmp | vasprintf | waitpid)
;;
*)
n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
Index: maint-tool
===================================================================
--- maint-tool (revision 191430)
+++ maint-tool (working copy)
@@ -222,7 +222,7 @@ sub deps {
opendir(INC, $incdir);
while ($f = readdir INC) {
- next unless $f =~ /\.h$/;
+ next unless $f =~ /\.h$/ || $f =~ /\.def$/;
$mine{$f} = "\$(INCDIR)/$f";
$deps{$f} = join(' ', &deps_for("$incdir/$f"));
}
Index: strnlen.c
===================================================================
--- strnlen.c (revision 0)
+++ strnlen.c (revision 0)
@@ -0,0 +1,28 @@
+/* Portable version of strnlen.
+ This function is in the public domain. */
+
+/*
+
+@deftypefn Supplemental size_t strnlen (const char *@var{s}, size_t @var{maxlen})
+
+Returns the length of @var{s}, as with @code{strlen}, but never looks
+past the first @var{maxlen} characters in the string. If there is no
+'\0' character in the first @var{maxlen} characters, returns
+@var{maxlen}.
+
+@end deftypefn
+
+*/
+
+#include "config.h"
+
+size_t
+strnlen (const char *s, size_t maxlen)
+{
+ size_t i;
+
+ for (i = 0; i < maxlen; ++i)
+ if (s[i] == '\0')
+ break;
+ return i;
+}
Index: Makefile.in
===================================================================
--- Makefile.in (revision 191430)
+++ Makefile.in (working copy)
@@ -151,7 +151,7 @@ CFILES = alloca.c argv.c asprintf.c atex
spaces.c splay-tree.c stack-limit.c stpcpy.c stpncpy.c \
strcasecmp.c strchr.c strdup.c strerror.c strncasecmp.c \
strncmp.c strrchr.c strsignal.c strstr.c strtod.c strtol.c \
- strtoul.c strndup.c strverscmp.c \
+ strtoul.c strndup.c strnlen.c strverscmp.c \
timeval-utils.c tmpnam.c \
unlink-if-ordinary.c \
vasprintf.c vfork.c vfprintf.c vprintf.c vsnprintf.c vsprintf.c \
@@ -215,9 +215,9 @@ CONFIGURED_OFILES = ./asprintf.$(objext)
./sigsetmask.$(objext) ./snprintf.$(objext) \
./stpcpy.$(objext) ./stpncpy.$(objext) ./strcasecmp.$(objext) \
./strchr.$(objext) ./strdup.$(objext) ./strncasecmp.$(objext) \
- ./strncmp.$(objext) ./strndup.$(objext) ./strrchr.$(objext) \
- ./strstr.$(objext) ./strtod.$(objext) ./strtol.$(objext) \
- ./strtoul.$(objext) ./strverscmp.$(objext) \
+ ./strncmp.$(objext) ./strndup.$(objext) ./strnlen.$(objext) \
+ ./strrchr.$(objext) ./strstr.$(objext) ./strtod.$(objext) \
+ ./strtol.$(objext) ./strtoul.$(objext) ./strverscmp.$(objext) \
./tmpnam.$(objext) \
./vasprintf.$(objext) ./vfork.$(objext) ./vfprintf.$(objext) \
./vprintf.$(objext) ./vsnprintf.$(objext) ./vsprintf.$(objext) \
@@ -622,8 +622,8 @@ $(CONFIGURED_OFILES): stamp-picdir
else true; fi
$(COMPILE.c) $(srcdir)/crc32.c $(OUTPUT_OPTION)
-./dwarfnames.$(objext): $(srcdir)/dwarfnames.c $(INCDIR)/dwarf2.h \
- $(INCDIR)/dwarf2.def
+./dwarfnames.$(objext): $(srcdir)/dwarfnames.c $(INCDIR)/dwarf2.def \
+ $(INCDIR)/dwarf2.h
if [ x"$(PICFLAG)" != x ]; then \
$(COMPILE.c) $(PICFLAG) $(srcdir)/dwarfnames.c -o pic/$@; \
else true; fi
@@ -656,7 +656,8 @@ $(CONFIGURED_OFILES): stamp-picdir
else true; fi
$(COMPILE.c) $(srcdir)/fibheap.c $(OUTPUT_OPTION)
-./filename_cmp.$(objext): $(srcdir)/filename_cmp.c config.h $(INCDIR)/filenames.h \
+./filename_cmp.$(objext): $(srcdir)/filename_cmp.c config.h $(INCDIR)/ansidecl.h \
+ $(INCDIR)/filenames.h $(INCDIR)/hashtab.h \
$(INCDIR)/safe-ctype.h
if [ x"$(PICFLAG)" != x ]; then \
$(COMPILE.c) $(PICFLAG) $(srcdir)/filename_cmp.c -o pic/$@; \
@@ -757,7 +758,7 @@ $(CONFIGURED_OFILES): stamp-picdir
$(COMPILE.c) $(srcdir)/insque.c $(OUTPUT_OPTION)
./lbasename.$(objext): $(srcdir)/lbasename.c config.h $(INCDIR)/ansidecl.h \
- $(INCDIR)/filenames.h $(INCDIR)/libiberty.h \
+ $(INCDIR)/filenames.h $(INCDIR)/hashtab.h $(INCDIR)/libiberty.h \
$(INCDIR)/safe-ctype.h
if [ x"$(PICFLAG)" != x ]; then \
$(COMPILE.c) $(PICFLAG) $(srcdir)/lbasename.c -o pic/$@; \
@@ -1043,7 +1044,7 @@ $(CONFIGURED_OFILES): stamp-picdir
else true; fi
$(COMPILE.c) $(srcdir)/splay-tree.c $(OUTPUT_OPTION)
-./stack-limit.$(objext): $(srcdir)/stack-limit.c config.h
+./stack-limit.$(objext): $(srcdir)/stack-limit.c config.h $(INCDIR)/ansidecl.h
if [ x"$(PICFLAG)" != x ]; then \
$(COMPILE.c) $(PICFLAG) $(srcdir)/stack-limit.c -o pic/$@; \
else true; fi
@@ -1104,6 +1105,12 @@ $(CONFIGURED_OFILES): stamp-picdir
else true; fi
$(COMPILE.c) $(srcdir)/strndup.c $(OUTPUT_OPTION)
+./strnlen.$(objext): $(srcdir)/strnlen.c config.h
+ if [ x"$(PICFLAG)" != x ]; then \
+ $(COMPILE.c) $(PICFLAG) $(srcdir)/strnlen.c -o pic/$@; \
+ else true; fi
+ $(COMPILE.c) $(srcdir)/strnlen.c $(OUTPUT_OPTION)
+
./strrchr.$(objext): $(srcdir)/strrchr.c $(INCDIR)/ansidecl.h
if [ x"$(PICFLAG)" != x ]; then \
$(COMPILE.c) $(PICFLAG) $(srcdir)/strrchr.c -o pic/$@; \
