--- libc/manual/string.texi.ark 2009-06-01 12:55:40.215888658 +0000
+++ libc/manual/string.texi 2009-06-01 12:56:52.832546231 +0000
@@ -33,8 +33,6 @@ too.
* Search Functions:: Searching for a specific element or substring.
* Finding Tokens in a String:: Splitting a string into tokens by looking
for delimiters.
-* strfry:: Function for flash-cooking a string.
-* Trivial Encryption:: Obscuring data.
* Encode Binary Data:: Encoding and Decoding of Binary Data.
* Argz and Envz Vectors:: Null-separated string vectors.
@end menu
@@ -2210,73 +2208,6 @@ contains no '/' characters, then "." is
function can be found in @file{libgen.h}.
@end deftypefun
-@node strfry
-@section strfry
-
-The function below addresses the perennial programming quandary: ``How do
-I take good data in string form and painlessly turn it into garbage?''
-This is actually a fairly simple task for C programmers who do not use
-the GNU C library string functions, but for programs based on the GNU C
-library, the @code{strfry} function is the preferred method for
-destroying string data.
-
-The prototype for this function is in @file{string.h}.
-
-@comment string.h
-@comment GNU
-@deftypefun {char *} strfry (char *@var{string})
-
-@code{strfry} creates a pseudorandom anagram of a string, replacing the
-input with the anagram in place. For each position in the string,
-@code{strfry} swaps it with a position in the string selected at random
-(from a uniform distribution). The two positions may be the same.
-
-The return value of @code{strfry} is always @var{string}.
-
-@strong{Portability Note:} This function is unique to the GNU C library.
-
-@end deftypefun
-
-
-@node Trivial Encryption
-@section Trivial Encryption
-@cindex encryption
-
-
-The @code{memfrob} function converts an array of data to something
-unrecognizable and back again. It is not encryption in its usual sense
-since it is easy for someone to convert the encrypted data back to clear
-text. The transformation is analogous to Usenet's ``Rot13'' encryption
-method for obscuring offensive jokes from sensitive eyes and such.
-Unlike Rot13, @code{memfrob} works on arbitrary binary data, not just
-text.
-@cindex Rot13
-
-For true encryption, @xref{Cryptographic Functions}.
-
-This function is declared in @file{string.h}.
-@pindex string.h
-
-@comment string.h
-@comment GNU
-@deftypefun {void *} memfrob (void *@var{mem}, size_t @var{length})
-
-@code{memfrob} transforms (frobnicates) each byte of the data structure
-at @var{mem}, which is @var{length} bytes long, by bitwise exclusive
-oring it with binary 00101010. It does the transformation in place and
-its return value is always @var{mem}.
-
-Note that @code{memfrob} a second time on the same data structure
-returns it to its original state.
-
-This is a good function for hiding information from someone who doesn't
-want to see it or doesn't want to see it very much. To really prevent
-people from retrieving the information, use stronger encryption such as
-that described in @xref{Cryptographic Functions}.
-
-@strong{Portability Note:} This function is unique to the GNU C library.
-
-@end deftypefun
@node Encode Binary Data
@section Encode Binary Data
--- libc/string/Makefile.ark 2009-06-01 12:53:04.589232822 +0000
+++ libc/string/Makefile 2009-06-01 12:53:22.449230397 +0000
@@ -36,7 +36,7 @@ routines := strcat strchr strcmp strcoll
mempcpy bcopy bzero ffs ffsll stpcpy stpncpy \
strcasecmp strncase strcasecmp_l strncase_l \
memccpy memcpy wordcopy strsep strcasestr \
- swab strfry memfrob memmem rawmemchr strchrnul \
+ swab memmem rawmemchr strchrnul \
$(addprefix argz-,append count create ctsep next \
delete extract insert stringify \
addsep replace) \
@@ -56,7 +56,7 @@ strop-tests := memchr memcmp memcpy memm
tests := tester inl-tester noinl-tester testcopy test-ffs \
tst-strlen stratcliff tst-svc tst-inlcall \
bug-strncat1 bug-strspn1 bug-strpbrk1 tst-bswap \
- tst-strtok tst-strfry \
+ tst-strtok \
bug-strtok1 $(addprefix test-,$(strop-tests)) \
tst-strxfrm2 tst-endian tst-svc2
tests-$(OPTION_EGLIBC_ENVZ) += bug-envz1
--- libc/string/string.h.ark 2009-06-01 12:55:13.699218522 +0000
+++ libc/string/string.h 2009-06-01 12:55:32.945887166 +0000
@@ -584,12 +584,6 @@ extern char *stpncpy (char *__restrict _
extern int strverscmp (__const char *__s1, __const char *__s2)
__THROW __attribute_pure__ __nonnull ((1, 2));
-/* Sautee STRING briskly. */
-extern char *strfry (char *__string) __THROW __nonnull ((1));
-
-/* Frobnicate N bytes of S. */
-extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1));
-
# ifndef basename
/* Return the file name within directory of FILENAME. We don't
declare the function if the `basename' macro is available (defined
--- libc/string/Versions.ark 2009-06-01 12:54:58.002553787 +0000
+++ libc/string/Versions 2009-06-01 12:55:07.719225116 +0000
@@ -29,14 +29,14 @@ libc {
index;
# m*
- memccpy; memchr; memcmp; memcpy; memfrob; memmem; memmove; memset;
+ memccpy; memchr; memcmp; memcpy; memmem; memmove; memset;
# r*
rindex;
# s*
stpcpy; stpncpy; strcasecmp; strcat; strchr; strcmp; strcoll; strcpy;
- strcspn; strdup; strerror; strerror_r; strfry; strlen; strncasecmp;
+ strcspn; strdup; strerror; strerror_r; strlen; strncasecmp;
strncat; strncmp; strncpy; strndup; strnlen; strpbrk; strrchr; strsep;
strsignal; strspn; strstr; strtok; strtok_r; strxfrm; swab;
}
