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authorUlrich Drepper <drepper@redhat.com>2000-09-11 20:33:59 +0000
committerUlrich Drepper <drepper@redhat.com>2000-09-11 20:33:59 +0000
commitf6ad47269a0bcfb8d037d19579bd801efd7d926c (patch)
tree80d87ad6a4f4d48d0f03ea04bcaca5beebbb4912 /iconvdata/utf-7.c
parentb81c896174dc98cb15cc80844751fb23cd9e02d1 (diff)
downloadglibc-f6ad47269a0bcfb8d037d19579bd801efd7d926c.tar.gz
Update.
2000-09-10 Bruno Haible <haible@clisp.cons.org> * locale/programs/ld-collate.c (collate_read): Fix typo in handling of decimal ellipsis. 2000-09-11 Bruno Haible <haible@clisp.cons.org> * locale/programs/ld-collate.c (collate_read): Always initialize error_section.next. 2000-09-10 Bruno Haible <haible@clisp.cons.org> * locale/programs/ld-collate.c (collate_finish): Upper bound for ruleidx is 128, not 256. 2000-09-11 Ulrich Drepper <drepper@redhat.com> * locale/programs/ld-collate.c (collate_read): Correct check for already inserted entries. 2000-09-10 Bruno Haible <haible@clisp.cons.org> * iconv/skeleton.c (FUNCTION_NAME): Handle unaligned access in second try as well. 2000-09-10 Bruno Haible <haible@clisp.cons.org> * iconv/skeleton.c (FUNCTION_NAME): Optimize an `if' if MAX_NEEDED_FROM > 1 && MAX_NEEDED_TO > 1. 2000-09-10 Bruno Haible <haible@clisp.cons.org> * iconv/skeleton.c (gconv_init): Replace all uses of RESET_STATE with SAVE_RESET_STATE. 2000-09-10 Bruno Haible <haible@clisp.cons.org> * iconvdata/utf-7.c: New file. * iconvdata/gconv-modules (UTF-7): New module entries. * iconvdata/Makefile (modules): Add UTF-7. (distribute): Add utf-7.c. * iconvdata/testdata/UTF-7: New file. * iconvdata/testdata/UTF-7..UTF8: New file. * iconvdata/TESTS (UTF-7): New entry. * iconvdata/run-iconv-test.sh: Fix confusing output.
Diffstat (limited to 'iconvdata/utf-7.c')
-rw-r--r--iconvdata/utf-7.c559
1 files changed, 559 insertions, 0 deletions
diff --git a/iconvdata/utf-7.c b/iconvdata/utf-7.c
new file mode 100644
index 0000000000..f02063d334
--- /dev/null
+++ b/iconvdata/utf-7.c
@@ -0,0 +1,559 @@
+/* Conversion module for UTF-7.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Bruno Haible <haible@clisp.cons.org>, 2000.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* UTF-7 is a legacy encoding used for transmitting Unicode within the
+ ASCII character set, used primarily by mail agents. New programs
+ are encouraged to use UTF-8 instead.
+
+ UTF-7 is specified in RFC 2152 (and old RFC 1641, RFC 1642). The
+ original Base64 encoding is defined in RFC 2045. */
+
+#include <dlfcn.h>
+#include <gconv.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+
+/* Define this to 1 if you want the so-called "optional direct" characters
+ ! " # $ % & * ; < = > @ [ ] ^ _ ` { | }
+ to be encoded. Define to 0 if you want them to be passed straight
+ through, like the so-called "direct" characters.
+ We set this to 1 because it's safer.
+ */
+#define UTF7_ENCODE_OPTIONAL_CHARS 1
+
+
+/* The set of "direct characters":
+ A-Z a-z 0-9 ' ( ) , - . / : ? space tab lf cr
+*/
+
+static const unsigned char direct_tab[128/8] =
+ {
+ 0x00, 0x26, 0x00, 0x00, 0x81, 0xf3, 0xff, 0x87,
+ 0xfe, 0xff, 0xff, 0x07, 0xfe, 0xff, 0xff, 0x07
+ };
+
+static inline int
+isdirect (uint32_t ch)
+{
+ return (ch < 128 && ((direct_tab[ch >> 3] >> (ch & 7)) & 1));
+}
+
+
+/* The set of "direct and optional direct characters":
+ A-Z a-z 0-9 ' ( ) , - . / : ? space tab lf cr
+ ! " # $ % & * ; < = > @ [ ] ^ _ ` { | }
+*/
+
+static const unsigned char xdirect_tab[128/8] =
+ {
+ 0x00, 0x26, 0x00, 0x00, 0xff, 0xf7, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xef, 0xff, 0xff, 0xff, 0x3f
+ };
+
+static inline int
+isxdirect (uint32_t ch)
+{
+ return (ch < 128 && ((xdirect_tab[ch >> 3] >> (ch & 7)) & 1));
+}
+
+
+/* The set of "extended base64 characters":
+ A-Z a-z 0-9 + / -
+*/
+
+static const unsigned char xbase64_tab[128/8] =
+ {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0xa8, 0xff, 0x03,
+ 0xfe, 0xff, 0xff, 0x07, 0xfe, 0xff, 0xff, 0x07
+ };
+
+static inline int
+isxbase64 (uint32_t ch)
+{
+ return (ch < 128 && ((xbase64_tab[ch >> 3] >> (ch & 7)) & 1));
+}
+
+
+/* Converts a value in the range 0..63 to a base64 encoded char. */
+static inline unsigned char
+base64 (unsigned int i)
+{
+ if (i < 26)
+ return i + 'A';
+ else if (i < 52)
+ return i - 26 + 'a';
+ else if (i < 62)
+ return i - 52 + '0';
+ else if (i == 62)
+ return '+';
+ else if (i == 63)
+ return '/';
+ else
+ abort ();
+}
+
+
+/* Definitions used in the body of the `gconv' function. */
+#define CHARSET_NAME "UTF-7//"
+#define DEFINE_INIT 1
+#define DEFINE_FINI 1
+#define FROM_LOOP from_utf7_loop
+#define TO_LOOP to_utf7_loop
+#define MIN_NEEDED_FROM 1
+#define MAX_NEEDED_FROM 6
+#define MIN_NEEDED_TO 4
+#define MAX_NEEDED_TO 4
+#define PREPARE_LOOP \
+ mbstate_t saved_state; \
+ mbstate_t *statep = data->__statep;
+#define EXTRA_LOOP_ARGS , statep
+
+
+/* Since we might have to reset input pointer we must be able to save
+ and restore the state. */
+#define SAVE_RESET_STATE(Save) \
+ if (Save) \
+ saved_state = *statep; \
+ else \
+ *statep = saved_state
+
+
+/* First define the conversion function from UTF-7 to UCS4.
+ The state is structured as follows:
+ __count bit 2..0: zero
+ __count bit 8..3: shift
+ __wch: data
+ Precise meaning:
+ shift data
+ 0 -- not inside base64 encoding
+ 1..32 XX..XX00..00 inside base64, (32 - shift) bits pending
+ This state layout is simpler than relying on STORE_REST/UNPACK_BYTES.
+
+ When shift = 0, __wch needs to store at most one lookahead byte (see
+ __GCONV_INCOMPLETE_INPUT below).
+*/
+#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
+#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
+#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
+#define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
+#define LOOPFCT FROM_LOOP
+#define BODY \
+ { \
+ uint_fast8_t ch = *inptr; \
+ \
+ if ((statep->__count >> 3) == 0) \
+ { \
+ /* base64 encoding inactive. */ \
+ if (isxdirect (ch)) \
+ { \
+ inptr++; \
+ put32 (outptr, ch); \
+ outptr += 4; \
+ } \
+ else if (__builtin_expect (ch == '+', 1)) \
+ { \
+ if (__builtin_expect (inptr + 2 >= inend, 0)) \
+ { \
+ /* Not enough input available. */ \
+ result = __GCONV_INCOMPLETE_INPUT; \
+ break; \
+ } \
+ if (inptr[1] == '-') \
+ { \
+ inptr += 2; \
+ put32 (outptr, ch); \
+ outptr += 4; \
+ } \
+ else \
+ { \
+ /* Switch into base64 mode. */ \
+ inptr++; \
+ statep->__count = (32 << 3); \
+ statep->__value.__wch = 0; \
+ } \
+ } \
+ else \
+ { \
+ /* The input is invalid. */ \
+ if (! ignore_errors_p ()) \
+ { \
+ result = __GCONV_ILLEGAL_INPUT; \
+ break; \
+ } \
+ \
+ ++inptr; \
+ ++*irreversible; \
+ } \
+ } \
+ else \
+ { \
+ /* base64 encoding active. */ \
+ uint32_t i; \
+ int shift; \
+ \
+ if (ch >= 'A' && ch <= 'Z') \
+ i = ch - 'A'; \
+ else if (ch >= 'a' && ch <= 'z') \
+ i = ch - 'a' + 26; \
+ else if (ch >= '0' && ch <= '9') \
+ i = ch - '0' + 52; \
+ else if (ch == '+') \
+ i = 62; \
+ else if (ch == '/') \
+ i = 63; \
+ else \
+ { \
+ /* Terminate base64 encoding. */ \
+ \
+ /* If accumulated data is nonzero, the input is invalid. */ \
+ /* Also, partial UTF-16 characters are invalid. */ \
+ if (__builtin_expect (statep->__value.__wch != 0, 0) \
+ || __builtin_expect ((statep->__count >> 3) <= 26, 0)) \
+ { \
+ if (! ignore_errors_p ()) \
+ { \
+ result = __GCONV_ILLEGAL_INPUT; \
+ break; \
+ } \
+ \
+ ++inptr; \
+ ++*irreversible; \
+ statep->__count = 0; \
+ continue; \
+ } \
+ \
+ if (ch == '-') \
+ inptr++; \
+ \
+ statep->__count = 0; \
+ continue; \
+ } \
+ \
+ /* Concatenate the base64 integer i to the accumulator. */ \
+ shift = (statep->__count >> 3); \
+ if (shift > 6) \
+ { \
+ uint32_t wch; \
+ \
+ shift -= 6; \
+ wch = statep->__value.__wch | (i << shift); \
+ \
+ if (shift <= 16 && shift > 10) \
+ { \
+ /* An UTF-16 character has just been completed. */ \
+ uint32_t wc1 = wch >> 16; \
+ \
+ /* UTF-16: When we see a High Surrogate, we must also decode \
+ the following Low Surrogate. */ \
+ if (!(wc1 >= 0xd800 && wc1 < 0xdc00)) \
+ { \
+ wch = wch << 16; \
+ shift += 16; \
+ put32 (outptr, wc1); \
+ outptr += 4; \
+ } \
+ } \
+ else if (shift <= 10 && shift > 4) \
+ { \
+ /* After a High Surrogate, verify that the next 16 bit \
+ indeed form a Low Surrogate. */ \
+ uint32_t wc2 = wch & 0xffff; \
+ \
+ if (! __builtin_expect (wc2 >= 0xdc00 && wc2 < 0xe000, 1)) \
+ { \
+ if (! ignore_errors_p ()) \
+ { \
+ result = __GCONV_ILLEGAL_INPUT; \
+ break; \
+ } \
+ \
+ ++inptr; \
+ ++*irreversible; \
+ statep->__count = 0; \
+ continue; \
+ } \
+ } \
+ \
+ statep->__value.__wch = wch; \
+ } \
+ else \
+ { \
+ /* An UTF-16 surrogate pair has just been completed. */ \
+ uint32_t wc1 = (uint32_t) statep->__value.__wch >> 16; \
+ uint32_t wc2 = ((uint32_t) statep->__value.__wch & 0xffff) \
+ | (i >> (6 - shift)); \
+ \
+ statep->__value.__wch = (i << shift) << 26; \
+ shift += 26; \
+ \
+ assert (wc1 >= 0xd800 && wc1 < 0xdc00); \
+ assert (wc2 >= 0xdc00 && wc2 < 0xe000); \
+ put32 (outptr, \
+ 0x10000 + ((wc1 - 0xd800) << 10) + (wc2 - 0xdc00)); \
+ outptr += 4; \
+ } \
+ \
+ statep->__count = shift << 3; \
+ \
+ /* Now that we digested the input increment the input pointer. */ \
+ inptr++; \
+ } \
+ }
+#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS , mbstate_t *statep
+#include <iconv/loop.c>
+
+
+/* Next, define the conversion from UCS4 to UTF-7.
+ The state is structured as follows:
+ __count bit 2..0: zero
+ __count bit 4..3: shift
+ __count bit 8..5: data
+ Precise meaning:
+ shift data
+ 0 0 not inside base64 encoding
+ 1 0 inside base64, no pending bits
+ 2 XX00 inside base64, 2 bits known for next byte
+ 3 XXXX inside base64, 4 bits known for next byte
+
+ __count bit 2..0 and __wch are always zero, because this direction
+ never returns __GCONV_INCOMPLETE_INPUT.
+*/
+#define MIN_NEEDED_INPUT MIN_NEEDED_TO
+#define MAX_NEEDED_INPUT MAX_NEEDED_TO
+#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
+#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
+#define LOOPFCT TO_LOOP
+#define BODY \
+ { \
+ uint32_t ch = get32 (inptr); \
+ \
+ if ((statep->__count & 0x18) == 0) \
+ { \
+ /* base64 encoding inactive */ \
+ if (UTF7_ENCODE_OPTIONAL_CHARS ? isdirect (ch) : isxdirect (ch)) \
+ { \
+ *outptr++ = (unsigned char) ch; \
+ } \
+ else \
+ { \
+ size_t count; \
+ \
+ if (ch == '+') \
+ count = 2; \
+ else if (ch < 0x10000) \
+ count = 3; \
+ else if (ch < 0x110000) \
+ count = 6; \
+ else \
+ STANDARD_ERR_HANDLER (4); \
+ \
+ if (__builtin_expect (outptr + count > outend, 0)) \
+ { \
+ result = __GCONV_FULL_OUTPUT; \
+ break; \
+ } \
+ \
+ *outptr++ = '+'; \
+ if (ch == '+') \
+ *outptr++ = '-'; \
+ else if (ch < 0x10000) \
+ { \
+ *outptr++ = base64 (ch >> 10); \
+ *outptr++ = base64 ((ch >> 4) & 0x3f); \
+ statep->__count = ((ch & 15) << 5) | (3 << 3); \
+ } \
+ else if (ch < 0x110000) \
+ { \
+ uint32_t ch1 = 0xd800 + ((ch - 0x10000) >> 10); \
+ uint32_t ch2 = 0xdc00 + ((ch - 0x10000) & 0x3ff); \
+ \
+ ch = (ch1 << 16) | ch2; \
+ *outptr++ = base64 (ch >> 26); \
+ *outptr++ = base64 ((ch >> 20) & 0x3f); \
+ *outptr++ = base64 ((ch >> 14) & 0x3f); \
+ *outptr++ = base64 ((ch >> 8) & 0x3f); \
+ *outptr++ = base64 ((ch >> 2) & 0x3f); \
+ statep->__count = ((ch & 3) << 7) | (2 << 3); \
+ } \
+ else \
+ abort (); \
+ } \
+ } \
+ else \
+ { \
+ /* base64 encoding active */ \
+ if (UTF7_ENCODE_OPTIONAL_CHARS ? isdirect (ch) : isxdirect (ch)) \
+ { \
+ /* deactivate base64 encoding */ \
+ size_t count; \
+ \
+ count = ((statep->__count & 0x18) >= 0x10) + isxbase64 (ch) + 1; \
+ if (__builtin_expect (outptr + count > outend, 0)) \
+ { \
+ result = __GCONV_FULL_OUTPUT; \
+ break; \
+ } \
+ \
+ if ((statep->__count & 0x18) >= 0x10) \
+ *outptr++ = base64 ((statep->__count >> 3) & ~3); \
+ if (isxbase64 (ch)) \
+ *outptr++ = '-'; \
+ *outptr++ = (unsigned char) ch; \
+ statep->__count = 0; \
+ } \
+ else \
+ { \
+ size_t count; \
+ \
+ if (ch < 0x10000) \
+ count = ((statep->__count & 0x18) >= 0x10 ? 3 : 2); \
+ else if (ch < 0x110000) \
+ count = ((statep->__count & 0x18) >= 0x18 ? 6 : 5); \
+ else \
+ STANDARD_ERR_HANDLER (4); \
+ \
+ if (__builtin_expect (outptr + count > outend, 0)) \
+ { \
+ result = __GCONV_FULL_OUTPUT; \
+ break; \
+ } \
+ \
+ if (ch < 0x10000) \
+ { \
+ switch ((statep->__count >> 3) & 3) \
+ { \
+ case 1: \
+ *outptr++ = base64 (ch >> 10); \
+ *outptr++ = base64 ((ch >> 4) & 0x3f); \
+ statep->__count = ((ch & 15) << 5) | (3 << 3); \
+ break; \
+ case 2: \
+ *outptr++ = \
+ base64 (((statep->__count >> 3) & ~3) | (ch >> 12)); \
+ *outptr++ = base64 ((ch >> 6) & 0x3f); \
+ *outptr++ = base64 (ch & 0x3f); \
+ statep->__count = (1 << 3); \
+ break; \
+ case 3: \
+ *outptr++ = \
+ base64 (((statep->__count >> 3) & ~3) | (ch >> 14)); \
+ *outptr++ = base64 ((ch >> 8) & 0x3f); \
+ *outptr++ = base64 ((ch >> 2) & 0x3f); \
+ statep->__count = ((ch & 3) << 7) | (2 << 3); \
+ break; \
+ default: \
+ abort (); \
+ } \
+ } \
+ else if (ch < 0x110000) \
+ { \
+ uint32_t ch1 = 0xd800 + ((ch - 0x10000) >> 10); \
+ uint32_t ch2 = 0xdc00 + ((ch - 0x10000) & 0x3ff); \
+ \
+ ch = (ch1 << 16) | ch2; \
+ switch ((statep->__count >> 3) & 3) \
+ { \
+ case 1: \
+ *outptr++ = base64 (ch >> 26); \
+ *outptr++ = base64 ((ch >> 20) & 0x3f); \
+ *outptr++ = base64 ((ch >> 14) & 0x3f); \
+ *outptr++ = base64 ((ch >> 8) & 0x3f); \
+ *outptr++ = base64 ((ch >> 2) & 0x3f); \
+ statep->__count = ((ch & 3) << 7) | (2 << 3); \
+ break; \
+ case 2: \
+ *outptr++ = \
+ base64 (((statep->__count >> 3) & ~3) | (ch >> 28)); \
+ *outptr++ = base64 ((ch >> 22) & 0x3f); \
+ *outptr++ = base64 ((ch >> 16) & 0x3f); \
+ *outptr++ = base64 ((ch >> 10) & 0x3f); \
+ *outptr++ = base64 ((ch >> 4) & 0x3f); \
+ statep->__count = ((ch & 15) << 5) | (3 << 3); \
+ break; \
+ case 3: \
+ *outptr++ = \
+ base64 (((statep->__count >> 3) & ~3) | (ch >> 30)); \
+ *outptr++ = base64 ((ch >> 24) & 0x3f); \
+ *outptr++ = base64 ((ch >> 18) & 0x3f); \
+ *outptr++ = base64 ((ch >> 12) & 0x3f); \
+ *outptr++ = base64 ((ch >> 6) & 0x3f); \
+ *outptr++ = base64 (ch & 0x3f); \
+ statep->__count = (1 << 3); \
+ break; \
+ default: \
+ abort (); \
+ } \
+ } \
+ else \
+ abort (); \
+ } \
+ } \
+ \
+ /* Now that we wrote the output increment the input pointer. */ \
+ inptr += 4; \
+ }
+#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS , mbstate_t *statep
+#include <iconv/loop.c>
+
+
+/* Since this is a stateful encoding we have to provide code which resets
+ the output state to the initial state. This has to be done during the
+ flushing. */
+#define EMIT_SHIFT_TO_INIT \
+ if (FROM_DIRECTION) \
+ /* Nothing to emit. */ \
+ memset (data->__statep, '\0', sizeof (mbstate_t)); \
+ else \
+ { \
+ /* The "to UTF-7" direction. Flush the remaining bits and terminate \
+ with a '-' byte. This will guarantee correct decoding if more \
+ UTF-7 encoded text is added afterwards. */ \
+ int state = data->__statep->__count; \
+ \
+ if (state & 0x18) \
+ { \
+ /* Deactivate base64 encoding. */ \
+ unsigned char *outbuf = data->__outbuf; \
+ size_t count = ((state & 0x18) >= 0x10) + 1; \
+ \
+ if (__builtin_expect (outbuf + count > data->__outbufend, 0)) \
+ /* We don't have enough room in the output buffer. */ \
+ status = __GCONV_FULL_OUTPUT; \
+ else \
+ { \
+ /* Write out the shift sequence. */ \
+ if ((state & 0x18) >= 0x10) \
+ *outbuf++ = base64 ((state >> 3) & ~3); \
+ *outbuf++ = '-'; \
+ \
+ data->__outbuf = outbuf; \
+ data->__statep->__count = 0; \
+ } \
+ } \
+ else \
+ data->__statep->__count = 0; \
+ }
+
+
+/* Now define the toplevel functions. */
+#include <iconv/skeleton.c>