/* CPP Library - charsets
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006, 2008, 2009
Free Software Foundation, Inc.
Broken out of c-lex.c Apr 2003, adding valid C99 UCN ranges.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
+Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+along with this program; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
{
ret.func = convert_no_conversion;
ret.cd = (iconv_t) -1;
+ ret.width = -1;
return ret;
}
{
ret.func = conversion_tab[i].func;
ret.cd = conversion_tab[i].fake_cd;
+ ret.width = -1;
return ret;
}
{
ret.func = convert_using_iconv;
ret.cd = iconv_open (to, from);
+ ret.width = -1;
if (ret.cd == (iconv_t) -1)
{
from, to);
ret.func = convert_no_conversion;
ret.cd = (iconv_t) -1;
+ ret.width = -1;
}
return ret;
}
wcset = default_wcset;
pfile->narrow_cset_desc = init_iconv_desc (pfile, ncset, SOURCE_CHARSET);
+ pfile->narrow_cset_desc.width = CPP_OPTION (pfile, char_precision);
+ pfile->char16_cset_desc = init_iconv_desc (pfile,
+ be ? "UTF-16BE" : "UTF-16LE",
+ SOURCE_CHARSET);
+ pfile->char16_cset_desc.width = 16;
+ pfile->char32_cset_desc = init_iconv_desc (pfile,
+ be ? "UTF-32BE" : "UTF-32LE",
+ SOURCE_CHARSET);
+ pfile->char32_cset_desc.width = 32;
pfile->wide_cset_desc = init_iconv_desc (pfile, wcset, SOURCE_CHARSET);
+ pfile->wide_cset_desc.width = CPP_OPTION (pfile, wchar_precision);
}
/* Destroy iconv(3) descriptors set up by cpp_init_iconv, if necessary. */
An advanced pointer is returned. Issues all relevant diagnostics. */
static const uchar *
convert_ucn (cpp_reader *pfile, const uchar *from, const uchar *limit,
- struct _cpp_strbuf *tbuf, bool wide)
+ struct _cpp_strbuf *tbuf, struct cset_converter cvt)
{
cppchar_t ucn;
uchar buf[6];
uchar *bufp = buf;
size_t bytesleft = 6;
int rval;
- struct cset_converter cvt
- = wide ? pfile->wide_cset_desc : pfile->narrow_cset_desc;
struct normalize_state nst = INITIAL_NORMALIZE_STATE;
from++; /* Skip u/U. */
function issues no diagnostics and never fails. */
static void
emit_numeric_escape (cpp_reader *pfile, cppchar_t n,
- struct _cpp_strbuf *tbuf, bool wide)
+ struct _cpp_strbuf *tbuf, struct cset_converter cvt)
{
- if (wide)
+ size_t width = cvt.width;
+
+ if (width != CPP_OPTION (pfile, char_precision))
{
/* We have to render this into the target byte order, which may not
be our byte order. */
bool bigend = CPP_OPTION (pfile, bytes_big_endian);
- size_t width = CPP_OPTION (pfile, wchar_precision);
size_t cwidth = CPP_OPTION (pfile, char_precision);
size_t cmask = width_to_mask (cwidth);
size_t nbwc = width / cwidth;
number. You can, e.g. generate surrogate pairs this way. */
static const uchar *
convert_hex (cpp_reader *pfile, const uchar *from, const uchar *limit,
- struct _cpp_strbuf *tbuf, bool wide)
+ struct _cpp_strbuf *tbuf, struct cset_converter cvt)
{
cppchar_t c, n = 0, overflow = 0;
int digits_found = 0;
- size_t width = (wide ? CPP_OPTION (pfile, wchar_precision)
- : CPP_OPTION (pfile, char_precision));
+ size_t width = cvt.width;
size_t mask = width_to_mask (width);
if (CPP_WTRADITIONAL (pfile))
n &= mask;
}
- emit_numeric_escape (pfile, n, tbuf, wide);
+ emit_numeric_escape (pfile, n, tbuf, cvt);
return from;
}
number. */
static const uchar *
convert_oct (cpp_reader *pfile, const uchar *from, const uchar *limit,
- struct _cpp_strbuf *tbuf, bool wide)
+ struct _cpp_strbuf *tbuf, struct cset_converter cvt)
{
size_t count = 0;
cppchar_t c, n = 0;
- size_t width = (wide ? CPP_OPTION (pfile, wchar_precision)
- : CPP_OPTION (pfile, char_precision));
+ size_t width = cvt.width;
size_t mask = width_to_mask (width);
bool overflow = false;
n &= mask;
}
- emit_numeric_escape (pfile, n, tbuf, wide);
+ emit_numeric_escape (pfile, n, tbuf, cvt);
return from;
}
pointer. Handles all relevant diagnostics. */
static const uchar *
convert_escape (cpp_reader *pfile, const uchar *from, const uchar *limit,
- struct _cpp_strbuf *tbuf, bool wide)
+ struct _cpp_strbuf *tbuf, struct cset_converter cvt)
{
/* Values of \a \b \e \f \n \r \t \v respectively. */
#if HOST_CHARSET == HOST_CHARSET_ASCII
#endif
uchar c;
- struct cset_converter cvt
- = wide ? pfile->wide_cset_desc : pfile->narrow_cset_desc;
c = *from;
switch (c)
{
/* UCNs, hex escapes, and octal escapes are processed separately. */
case 'u': case 'U':
- return convert_ucn (pfile, from, limit, tbuf, wide);
+ return convert_ucn (pfile, from, limit, tbuf, cvt);
case 'x':
- return convert_hex (pfile, from, limit, tbuf, wide);
+ return convert_hex (pfile, from, limit, tbuf, cvt);
break;
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
- return convert_oct (pfile, from, limit, tbuf, wide);
+ return convert_oct (pfile, from, limit, tbuf, cvt);
/* Various letter escapes. Get the appropriate host-charset
value into C. */
return from + 1;
}
\f
+/* TYPE is a token type. The return value is the conversion needed to
+ convert from source to execution character set for the given type. */
+static struct cset_converter
+converter_for_type (cpp_reader *pfile, enum cpp_ttype type)
+{
+ switch (type)
+ {
+ default:
+ return pfile->narrow_cset_desc;
+ case CPP_CHAR16:
+ case CPP_STRING16:
+ return pfile->char16_cset_desc;
+ case CPP_CHAR32:
+ case CPP_STRING32:
+ return pfile->char32_cset_desc;
+ case CPP_WCHAR:
+ case CPP_WSTRING:
+ return pfile->wide_cset_desc;
+ }
+}
+
/* FROM is an array of cpp_string structures of length COUNT. These
are to be converted from the source to the execution character set,
escape sequences translated, and finally all are to be
false for failure. */
bool
cpp_interpret_string (cpp_reader *pfile, const cpp_string *from, size_t count,
- cpp_string *to, bool wide)
+ cpp_string *to, enum cpp_ttype type)
{
struct _cpp_strbuf tbuf;
const uchar *p, *base, *limit;
size_t i;
- struct cset_converter cvt
- = wide ? pfile->wide_cset_desc : pfile->narrow_cset_desc;
+ struct cset_converter cvt = converter_for_type (pfile, type);
tbuf.asize = MAX (OUTBUF_BLOCK_SIZE, from->len);
tbuf.text = XNEWVEC (uchar, tbuf.asize);
for (i = 0; i < count; i++)
{
p = from[i].text;
- if (*p == 'L') p++;
+ if (*p == 'L' || *p == 'u' || *p == 'U') p++;
p++; /* Skip leading quote. */
limit = from[i].text + from[i].len - 1; /* Skip trailing quote. */
if (p == limit)
break;
- p = convert_escape (pfile, p + 1, limit, &tbuf, wide);
+ p = convert_escape (pfile, p + 1, limit, &tbuf, cvt);
}
}
/* NUL-terminate the 'to' buffer and translate it to a cpp_string
structure. */
- emit_numeric_escape (pfile, 0, &tbuf, wide);
+ emit_numeric_escape (pfile, 0, &tbuf, cvt);
tbuf.text = XRESIZEVEC (uchar, tbuf.text, tbuf.len);
to->text = tbuf.text;
to->len = tbuf.len;
in a string, but do not perform character set conversion. */
bool
cpp_interpret_string_notranslate (cpp_reader *pfile, const cpp_string *from,
- size_t count, cpp_string *to, bool wide)
+ size_t count, cpp_string *to,
+ enum cpp_ttype type ATTRIBUTE_UNUSED)
{
struct cset_converter save_narrow_cset_desc = pfile->narrow_cset_desc;
bool retval;
pfile->narrow_cset_desc.func = convert_no_conversion;
pfile->narrow_cset_desc.cd = (iconv_t) -1;
+ pfile->narrow_cset_desc.width = CPP_OPTION (pfile, char_precision);
- retval = cpp_interpret_string (pfile, from, count, to, wide);
+ retval = cpp_interpret_string (pfile, from, count, to, CPP_STRING);
pfile->narrow_cset_desc = save_narrow_cset_desc;
return retval;
/* Subroutine of cpp_interpret_charconst which performs the conversion
to a number, for wide strings. STR is the string structure returned
by cpp_interpret_string. PCHARS_SEEN and UNSIGNEDP are as for
- cpp_interpret_charconst. */
+ cpp_interpret_charconst. TYPE is the token type. */
static cppchar_t
wide_str_to_charconst (cpp_reader *pfile, cpp_string str,
- unsigned int *pchars_seen, int *unsignedp)
+ unsigned int *pchars_seen, int *unsignedp,
+ enum cpp_ttype type)
{
bool bigend = CPP_OPTION (pfile, bytes_big_endian);
- size_t width = CPP_OPTION (pfile, wchar_precision);
+ size_t width = converter_for_type (pfile, type).width;
size_t cwidth = CPP_OPTION (pfile, char_precision);
size_t mask = width_to_mask (width);
size_t cmask = width_to_mask (cwidth);
/* Wide character constants have type wchar_t, and a single
character exactly fills a wchar_t, so a multi-character wide
character constant is guaranteed to overflow. */
- if (off > 0)
+ if (str.len > nbwc * 2)
cpp_error (pfile, CPP_DL_WARNING,
"character constant too long for its type");
sign- or zero-extend to the full width of cppchar_t. */
if (width < BITS_PER_CPPCHAR_T)
{
- if (CPP_OPTION (pfile, unsigned_wchar) || !(result & (1 << (width - 1))))
+ if (type == CPP_CHAR16 || type == CPP_CHAR32
+ || CPP_OPTION (pfile, unsigned_wchar)
+ || !(result & (1 << (width - 1))))
result &= mask;
else
result |= ~mask;
}
- *unsignedp = CPP_OPTION (pfile, unsigned_wchar);
+ if (type == CPP_CHAR16 || type == CPP_CHAR32
+ || CPP_OPTION (pfile, unsigned_wchar))
+ *unsignedp = 1;
+ else
+ *unsignedp = 0;
+
*pchars_seen = 1;
return result;
}
unsigned int *pchars_seen, int *unsignedp)
{
cpp_string str = { 0, 0 };
- bool wide = (token->type == CPP_WCHAR);
+ bool wide = (token->type != CPP_CHAR);
cppchar_t result;
- /* an empty constant will appear as L'' or '' */
+ /* an empty constant will appear as L'', u'', U'' or '' */
if (token->val.str.len == (size_t) (2 + wide))
{
cpp_error (pfile, CPP_DL_ERROR, "empty character constant");
return 0;
}
- else if (!cpp_interpret_string (pfile, &token->val.str, 1, &str, wide))
+ else if (!cpp_interpret_string (pfile, &token->val.str, 1, &str, token->type))
return 0;
if (wide)
- result = wide_str_to_charconst (pfile, str, pchars_seen, unsignedp);
+ result = wide_str_to_charconst (pfile, str, pchars_seen, unsignedp,
+ token->type);
else
result = narrow_str_to_charconst (pfile, str, pchars_seen, unsignedp);
source file) from INPUT_CHARSET to the source character set. INPUT
points to the input buffer, SIZE is its allocated size, and LEN is
the length of the meaningful data within the buffer. The
- translated buffer is returned, and *ST_SIZE is set to the length of
- the meaningful data within the translated buffer.
-
- INPUT is expected to have been allocated with xmalloc. This function
- will either return INPUT, or free it and return a pointer to another
- xmalloc-allocated block of memory. */
+ translated buffer is returned, *ST_SIZE is set to the length of
+ the meaningful data within the translated buffer, and *BUFFER_START
+ is set to the start of the returned buffer. *BUFFER_START may
+ differ from the return value in the case of a BOM or other ignored
+ marker information.
+
+ INPUT is expected to have been allocated with xmalloc. This
+ function will either set *BUFFER_START to INPUT, or free it and set
+ *BUFFER_START to a pointer to another xmalloc-allocated block of
+ memory. */
uchar *
_cpp_convert_input (cpp_reader *pfile, const char *input_charset,
- uchar *input, size_t size, size_t len, off_t *st_size)
+ uchar *input, size_t size, size_t len,
+ const unsigned char **buffer_start, off_t *st_size)
{
struct cset_converter input_cset;
struct _cpp_strbuf to;
+ unsigned char *buffer;
input_cset = init_iconv_desc (pfile, SOURCE_CHARSET, input_charset);
if (input_cset.func == convert_no_conversion)
else
to.text[to.len] = '\n';
+ buffer = to.text;
*st_size = to.len;
- return to.text;
+#if HOST_CHARSET == HOST_CHARSET_ASCII
+ /* The HOST_CHARSET test just above ensures that the source charset
+ is UTF-8. So, ignore a UTF-8 BOM if we see one. Note that
+ glib'c UTF-8 iconv() provider (as of glibc 2.7) does not ignore a
+ BOM -- however, even if it did, we would still need this code due
+ to the 'convert_no_conversion' case. */
+ if (to.len >= 3 && to.text[0] == 0xef && to.text[1] == 0xbb
+ && to.text[2] == 0xbf)
+ {
+ *st_size -= 3;
+ buffer += 3;
+ }
+#endif
+
+ *buffer_start = to.text;
+ return buffer;
}
/* Decide on the default encoding to assume for input files. */
projects / fw / sdcc / blobdiff