+++ /dev/null
-// Input_iconv.java -- Java side of iconv() reader.
-
-/* Copyright (C) 2000, 2001 Free Software Foundation
-
- This file is part of libgcj.
-
-This software is copyrighted work licensed under the terms of the
-Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
-details. */
-
-/* Author: Tom Tromey <tromey@redhat.com>. */
-
-#include <config.h>
-
-#include <gcj/cni.h>
-#include <jvm.h>
-
-#include <gnu/gcj/convert/Input_iconv.h>
-#include <gnu/gcj/convert/Output_iconv.h>
-#include <java/io/CharConversionException.h>
-#include <java/io/UnsupportedEncodingException.h>
-
-#include <errno.h>
-
-#ifdef HAVE_ICONV
-#include <iconv.h>
-
-template<typename T>
-static inline size_t
-iconv_adapter (size_t (*iconv_f) (iconv_t, T, size_t *, char **, size_t *),
- iconv_t handle, char **inbuf, size_t *inavail,
- char **outbuf, size_t *outavail)
-{
- return (*iconv_f) (handle, (T) inbuf, inavail, outbuf, outavail);
-}
-
-#endif
-
-void
-gnu::gcj::convert::Input_iconv::init (jstring encoding)
-{
-#ifdef HAVE_ICONV
- jsize len = _Jv_GetStringUTFLength (encoding);
- char buffer[len + 1];
- _Jv_GetStringUTFRegion (encoding, 0, len, buffer);
- buffer[len] = '\0';
-
- iconv_t h = iconv_open ("UCS-2", buffer);
- if (h == (iconv_t) -1)
- throw new java::io::UnsupportedEncodingException (encoding);
-
- JvAssert (h != NULL);
- handle = reinterpret_cast<gnu::gcj::RawData *> (h);
-#else /* HAVE_ICONV */
- // If no iconv, just throw an exception.
- throw new java::io::UnsupportedEncodingException (encoding);
-#endif /* HAVE_ICONV */
-}
-
-void
-gnu::gcj::convert::Input_iconv::finalize (void)
-{
-#ifdef HAVE_ICONV
- if (handle != NULL)
- {
- iconv_close ((iconv_t) handle);
- handle = NULL;
- }
-#endif /* HAVE_ICONV */
-}
-
-jint
-gnu::gcj::convert::Input_iconv::read (jcharArray outbuffer,
- jint outpos, jint count)
-{
-#ifdef HAVE_ICONV
- jbyte *bytes = elements (inbuffer);
- jchar *out = elements (outbuffer);
- size_t inavail = inlength - inpos;
- size_t old_in = inavail;
- size_t outavail = count * sizeof (jchar);
- size_t old_out = outavail;
-
- char *inbuf = (char *) &bytes[inpos];
- char *outbuf = (char *) &out[outpos];
-
- size_t r = iconv_adapter (iconv, (iconv_t) handle,
- &inbuf, &inavail,
- &outbuf, &outavail);
-
- if (r == (size_t) -1)
- {
- // If we see EINVAL then there is an incomplete sequence at the
- // end of the input buffer. If we see E2BIG then we ran out of
- // space in the output buffer. However, in both these cases
- // some conversion might have taken place. So we fall through
- // to the normal case.
- if (errno != EINVAL && errno != E2BIG)
- throw new java::io::CharConversionException ();
- }
-
- if (iconv_byte_swap)
- {
- size_t max = (old_out - outavail) / sizeof (jchar);
- for (size_t i = 0; i < max; ++i)
- {
- // Byte swap.
- jchar c = (((out[outpos + i] & 0xff) << 8)
- | ((out[outpos + i] >> 8) & 0xff));
- outbuf[i] = c;
- }
- }
-
- inpos += old_in - inavail;
- return (old_out - outavail) / sizeof (jchar);
-#else /* HAVE_ICONV */
- return -1;
-#endif /* HAVE_ICONV */
-}
-
-void
-gnu::gcj::convert::Input_iconv::done ()
-{
-#ifdef HAVE_ICONV
- // 50 bytes should be enough for any reset sequence.
- size_t avail = 50;
- char tmp[avail];
- char *p = tmp;
- // Calling iconv() with a NULL INBUF pointer will cause iconv() to
- // switch to its initial state. We don't care about the output that
- // might be generated in that situation.
- iconv_adapter (iconv, (iconv_t) handle, NULL, NULL, &p, &avail);
- BytesToUnicode::done ();
-#else /* HAVE_ICONV */
- // If no iconv, do nothing
-#endif /* HAVE_ICONV */
-}
-
-void
-gnu::gcj::convert::Output_iconv::init (jstring encoding)
-{
-#ifdef HAVE_ICONV
- jsize len = _Jv_GetStringUTFLength (encoding);
- char buffer[len + 1];
- _Jv_GetStringUTFRegion (encoding, 0, len, buffer);
- buffer[len] = '\0';
-
- iconv_t h = iconv_open (buffer, "UCS-2");
- if (h == (iconv_t) -1)
- throw new java::io::UnsupportedEncodingException (encoding);
-
- JvAssert (h != NULL);
- handle = reinterpret_cast<gnu::gcj::RawData *> (h);
-#else /* HAVE_ICONV */
- // If no iconv, just throw an exception.
- throw new java::io::UnsupportedEncodingException (encoding);
-#endif /* HAVE_ICONV */
-}
-
-void
-gnu::gcj::convert::Output_iconv::finalize (void)
-{
-#ifdef HAVE_ICONV
- if (handle != NULL)
- {
- iconv_close ((iconv_t) handle);
- handle = NULL;
- }
-#endif /* HAVE_ICONV */
-}
-
-jint
-gnu::gcj::convert::Output_iconv::write (jcharArray inbuffer,
- jint inpos, jint inlength)
-{
-#ifdef HAVE_ICONV
- jchar *chars = elements (inbuffer);
- jbyte *out = elements (buf);
- jchar *temp_buffer = NULL;
-
- size_t inavail = inlength * sizeof (jchar);
- size_t old_in = inavail;
-
- size_t outavail = buf->length - count;
- size_t old_out = outavail;
-
- char *inbuf = (char *) &chars[inpos];
- char *outbuf = (char *) &out[count];
-
- if (iconv_byte_swap)
- {
- // Ugly performance penalty -- don't use losing systems!
- temp_buffer = (jchar *) _Jv_Malloc (inlength * sizeof (jchar));
- for (int i = 0; i < inlength; ++i)
- {
- // Byte swap.
- jchar c = (((chars[inpos + i] & 0xff) << 8)
- | ((chars[inpos + i] >> 8) & 0xff));
- temp_buffer[i] = c;
- }
- inbuf = (char *) temp_buffer;
- }
-
- // If the conversion fails on the very first character, then we
- // assume that the character can't be represented in the output
- // encoding. There's nothing useful we can do here, so we simply
- // omit that character. Note that we can't check `errno' because
- // glibc 2.1.3 doesn't set it correctly. We could check it if we
- // really needed to, but we'd have to disable support for 2.1.3.
- size_t loop_old_in = old_in;
- while (1)
- {
- size_t r = iconv_adapter (iconv, (iconv_t) handle,
- &inbuf, &inavail,
- &outbuf, &outavail);
- if (r == (size_t) -1 && inavail == loop_old_in)
- {
- inavail -= 2;
- if (inavail == 0)
- break;
- loop_old_in -= 2;
- inbuf += 2;
- }
- else
- break;
- }
-
- if (temp_buffer != NULL)
- _Jv_Free (temp_buffer);
-
- count += old_out - outavail;
- return (old_in - inavail) / sizeof (jchar);
-#else /* HAVE_ICONV */
- return -1;
-#endif /* HAVE_ICONV */
-}
-
-jboolean
-gnu::gcj::convert::IOConverter::iconv_init (void)
-{
- // Some versions of iconv() always return their UCS-2 results in
- // big-endian order, and they also require UCS-2 inputs to be in
- // big-endian order. For instance, glibc 2.1.3 does this. If the
- // UTF-8=>UCS-2 iconv converter has this feature, then we assume
- // that all UCS-2 converters do. (This might not be the best
- // heuristic, but is is all we've got.)
- jboolean result = false;
-#ifdef HAVE_ICONV
- iconv_t handle = iconv_open ("UCS-2", "UTF-8");
- if (handle != (iconv_t) -1)
- {
- jchar c;
- unsigned char in[3];
- char *inp, *outp;
- size_t inc, outc, r;
-
- // This is the UTF-8 encoding of \ufeff.
- in[0] = 0xef;
- in[1] = 0xbb;
- in[2] = 0xbf;
-
- inp = (char *) in;
- inc = 3;
- outp = (char *) &c;
- outc = 2;
-
- r = iconv_adapter (iconv, handle, &inp, &inc, &outp, &outc);
- // Conversion must be complete for us to use the result.
- if (r != (size_t) -1 && inc == 0 && outc == 0)
- result = (c != 0xfeff);
- }
-#endif /* HAVE_ICONV */
- return result;
-}
-
-void
-gnu::gcj::convert::Output_iconv::done ()
-{
-#ifdef HAVE_ICONV
- // 50 bytes should be enough for any reset sequence.
- size_t avail = 50;
- char tmp[avail];
- char *p = tmp;
- // Calling iconv() with a NULL INBUF pointer will cause iconv() to
- // switch to its initial state. We don't care about the output that
- // might be generated in that situation.
- iconv_adapter (iconv, (iconv_t) handle, NULL, NULL, &p, &avail);
- UnicodeToBytes::done ();
-#else /* HAVE_ICONV */
- // If no iconv, do nothing
-#endif /* HAVE_ICONV */
-}
projects / msp430-gcc.git / blobdiff