/* A tricky optimization, but probably worth it. */
unsigned long
scm_i_utf8_string_hash (const char *str, size_t len)
{
const scm_t_uint8 *end, *ustr = (const scm_t_uint8 *) str;
unsigned long ret;
/* The length of the string in characters. This name corresponds to
Jenkins' original name. */
size_t length;
scm_t_uint32 a, b, c, u32;
if (len == (size_t) -1)
len = strlen (str);
end = ustr + len;
if (u8_check (ustr, len) != NULL)
/* Invalid UTF-8; punt. */
return scm_i_string_hash (scm_from_utf8_stringn (str, len));
length = u8_strnlen (ustr, len);
/* Set up the internal state. */
a = b = c = 0xdeadbeef + ((scm_t_uint32)(length<<2)) + 47;
/* Handle most of the key. */
while (length > 3)
{
ustr += u8_mbtouc_unsafe (&u32, ustr, end - ustr);
a += u32;
ustr += u8_mbtouc_unsafe (&u32, ustr, end - ustr);
b += u32;
ustr += u8_mbtouc_unsafe (&u32, ustr, end - ustr);
c += u32;
mix (a, b, c);
length -= 3;
}
/* Handle the last 3 elements's. */
ustr += u8_mbtouc_unsafe (&u32, ustr, end - ustr);
a += u32;
if (--length)
{
ustr += u8_mbtouc_unsafe (&u32, ustr, end - ustr);
b += u32;
if (--length)
{
ustr += u8_mbtouc_unsafe (&u32, ustr, end - ustr);
c += u32;
}
}
final (a, b, c);
int
u8_width (const uint8_t *s, size_t n, const char *encoding)
{
const uint8_t *s_end = s + n;
int width = 0;
while (s < s_end)
{
ucs4_t uc;
int w;
s += u8_mbtouc_unsafe (&uc, s, s_end - s);
if (uc == 0)
break; /* end of string reached */
w = uc_width (uc, encoding);
if (w >= 0) /* ignore control characters in the string */
width += w;
}
return width;
}
static int
mem_cd_iconveh_internal (const char *src, size_t srclen,
iconv_t cd, iconv_t cd1, iconv_t cd2,
enum iconv_ilseq_handler handler,
size_t extra_alloc,
size_t *offsets,
char **resultp, size_t *lengthp)
{
/* When a conversion error occurs, we cannot start using CD1 and CD2 at
this point: FROM_CODESET may be a stateful encoding like ISO-2022-KR.
Instead, we have to start afresh from the beginning of SRC. */
/* Use a temporary buffer, so that for small strings, a single malloc()
call will be sufficient. */
# define tmpbufsize 4096
/* The alignment is needed when converting e.g. to glibc's WCHAR_T or
libiconv's UCS-4-INTERNAL encoding. */
union { unsigned int align; char buf[tmpbufsize]; } tmp;
# define tmpbuf tmp.buf
char *initial_result;
char *result;
size_t allocated;
size_t length;
size_t last_length = (size_t)(-1); /* only needed if offsets != NULL */
if (*resultp != NULL && *lengthp >= sizeof (tmpbuf))
{
initial_result = *resultp;
allocated = *lengthp;
}
else
{
initial_result = tmpbuf;
allocated = sizeof (tmpbuf);
}
result = initial_result;
/* Test whether a direct conversion is possible at all. */
if (cd == (iconv_t)(-1))
goto indirectly;
if (offsets != NULL)
{
size_t i;
for (i = 0; i < srclen; i++)
offsets[i] = (size_t)(-1);
last_length = (size_t)(-1);
}
length = 0;
/* First, try a direct conversion, and see whether a conversion error
occurs at all. */
{
const char *inptr = src;
size_t insize = srclen;
/* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug. */
# if defined _LIBICONV_VERSION \
|| !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
|| defined __sun)
/* Set to the initial state. */
iconv (cd, NULL, NULL, NULL, NULL);
# endif
while (insize > 0)
{
char *outptr = result + length;
size_t outsize = allocated - extra_alloc - length;
bool incremented;
size_t res;
bool grow;
if (offsets != NULL)
{
if (length != last_length) /* ensure that offset[] be increasing */
{
offsets[inptr - src] = length;
last_length = length;
}
res = iconv_carefully_1 (cd,
&inptr, &insize,
&outptr, &outsize,
&incremented);
}
else
/* Use iconv_carefully instead of iconv here, because:
- If TO_CODESET is UTF-8, we can do the error handling in this
loop, no need for a second loop,
- With iconv() implementations other than GNU libiconv and GNU
libc, if we use iconv() in a big swoop, checking for an E2BIG
return, we lose the number of irreversible conversions. */
res = iconv_carefully (cd,
&inptr, &insize,
&outptr, &outsize,
&incremented);
length = outptr - result;
grow = (length + extra_alloc > allocated / 2);
if (res == (size_t)(-1))
{
if (errno == E2BIG)
grow = true;
else if (errno == EINVAL)
break;
else if (errno == EILSEQ && handler != iconveh_error)
{
if (cd2 == (iconv_t)(-1))
{
/* TO_CODESET is UTF-8. */
/* Error handling can produce up to 1 byte of output. */
if (length + 1 + extra_alloc > allocated)
{
char *memory;
allocated = 2 * allocated;
if (length + 1 + extra_alloc > allocated)
abort ();
if (result == initial_result)
memory = (char *) malloc (allocated);
else
memory = (char *) realloc (result, allocated);
if (memory == NULL)
{
if (result != initial_result)
free (result);
errno = ENOMEM;
return -1;
}
if (result == initial_result)
memcpy (memory, initial_result, length);
result = memory;
grow = false;
}
/* The input is invalid in FROM_CODESET. Eat up one byte
and emit a question mark. */
if (!incremented)
{
if (insize == 0)
abort ();
inptr++;
insize--;
}
result[length] = '?';
length++;
}
else
goto indirectly;
}
else
{
if (result != initial_result)
{
int saved_errno = errno;
free (result);
errno = saved_errno;
}
return -1;
}
}
if (insize == 0)
break;
if (grow)
{
char *memory;
allocated = 2 * allocated;
if (result == initial_result)
memory = (char *) malloc (allocated);
else
memory = (char *) realloc (result, allocated);
if (memory == NULL)
{
if (result != initial_result)
free (result);
errno = ENOMEM;
return -1;
}
if (result == initial_result)
memcpy (memory, initial_result, length);
result = memory;
}
}
}
/* Now get the conversion state back to the initial state.
But avoid glibc-2.1 bug and Solaris 2.7 bug. */
#if defined _LIBICONV_VERSION \
|| !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
|| defined __sun)
for (;;)
{
char *outptr = result + length;
size_t outsize = allocated - extra_alloc - length;
size_t res;
res = iconv (cd, NULL, NULL, &outptr, &outsize);
length = outptr - result;
if (res == (size_t)(-1))
{
if (errno == E2BIG)
{
char *memory;
allocated = 2 * allocated;
if (result == initial_result)
memory = (char *) malloc (allocated);
else
memory = (char *) realloc (result, allocated);
if (memory == NULL)
{
if (result != initial_result)
free (result);
errno = ENOMEM;
return -1;
}
if (result == initial_result)
memcpy (memory, initial_result, length);
result = memory;
}
else
{
if (result != initial_result)
{
int saved_errno = errno;
free (result);
errno = saved_errno;
}
return -1;
}
}
else
break;
}
#endif
/* The direct conversion succeeded. */
goto done;
indirectly:
/* The direct conversion failed.
Use a conversion through UTF-8. */
if (offsets != NULL)
{
size_t i;
for (i = 0; i < srclen; i++)
offsets[i] = (size_t)(-1);
last_length = (size_t)(-1);
}
length = 0;
{
const bool slowly = (offsets != NULL || handler == iconveh_error);
# define utf8bufsize 4096 /* may also be smaller or larger than tmpbufsize */
char utf8buf[utf8bufsize + 1];
size_t utf8len = 0;
const char *in1ptr = src;
size_t in1size = srclen;
bool do_final_flush1 = true;
bool do_final_flush2 = true;
/* Avoid glibc-2.1 bug and Solaris 2.7-2.9 bug. */
# if defined _LIBICONV_VERSION \
|| !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
|| defined __sun)
/* Set to the initial state. */
if (cd1 != (iconv_t)(-1))
iconv (cd1, NULL, NULL, NULL, NULL);
if (cd2 != (iconv_t)(-1))
iconv (cd2, NULL, NULL, NULL, NULL);
# endif
while (in1size > 0 || do_final_flush1 || utf8len > 0 || do_final_flush2)
{
char *out1ptr = utf8buf + utf8len;
size_t out1size = utf8bufsize - utf8len;
bool incremented1;
size_t res1;
int errno1;
/* Conversion step 1: from FROM_CODESET to UTF-8. */
if (in1size > 0)
{
if (offsets != NULL
&& length != last_length) /* ensure that offset[] be increasing */
{
offsets[in1ptr - src] = length;
last_length = length;
}
if (cd1 != (iconv_t)(-1))
{
if (slowly)
res1 = iconv_carefully_1 (cd1,
&in1ptr, &in1size,
&out1ptr, &out1size,
&incremented1);
else
res1 = iconv_carefully (cd1,
&in1ptr, &in1size,
&out1ptr, &out1size,
&incremented1);
}
else
{
/* FROM_CODESET is UTF-8. */
res1 = utf8conv_carefully (slowly,
&in1ptr, &in1size,
&out1ptr, &out1size,
&incremented1);
}
}
else if (do_final_flush1)
{
/* Now get the conversion state of CD1 back to the initial state.
But avoid glibc-2.1 bug and Solaris 2.7 bug. */
# if defined _LIBICONV_VERSION \
|| !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
|| defined __sun)
if (cd1 != (iconv_t)(-1))
res1 = iconv (cd1, NULL, NULL, &out1ptr, &out1size);
else
# endif
res1 = 0;
do_final_flush1 = false;
incremented1 = true;
}
else
{
res1 = 0;
incremented1 = true;
}
if (res1 == (size_t)(-1)
&& !(errno == E2BIG || errno == EINVAL || errno == EILSEQ))
{
if (result != initial_result)
{
int saved_errno = errno;
free (result);
errno = saved_errno;
}
return -1;
}
if (res1 == (size_t)(-1)
&& errno == EILSEQ && handler != iconveh_error)
{
/* The input is invalid in FROM_CODESET. Eat up one byte and
emit a question mark. Room for the question mark was allocated
at the end of utf8buf. */
if (!incremented1)
{
if (in1size == 0)
abort ();
in1ptr++;
in1size--;
}
*out1ptr++ = '?';
res1 = 0;
}
errno1 = errno;
utf8len = out1ptr - utf8buf;
if (offsets != NULL
|| in1size == 0
|| utf8len > utf8bufsize / 2
|| (res1 == (size_t)(-1) && errno1 == E2BIG))
{
/* Conversion step 2: from UTF-8 to TO_CODESET. */
const char *in2ptr = utf8buf;
size_t in2size = utf8len;
while (in2size > 0
|| (in1size == 0 && !do_final_flush1 && do_final_flush2))
{
char *out2ptr = result + length;
size_t out2size = allocated - extra_alloc - length;
bool incremented2;
size_t res2;
bool grow;
if (in2size > 0)
{
if (cd2 != (iconv_t)(-1))
res2 = iconv_carefully (cd2,
&in2ptr, &in2size,
&out2ptr, &out2size,
&incremented2);
else
/* TO_CODESET is UTF-8. */
res2 = utf8conv_carefully (false,
&in2ptr, &in2size,
&out2ptr, &out2size,
&incremented2);
}
else /* in1size == 0 && !do_final_flush1
&& in2size == 0 && do_final_flush2 */
{
/* Now get the conversion state of CD1 back to the initial
state. But avoid glibc-2.1 bug and Solaris 2.7 bug. */
# if defined _LIBICONV_VERSION \
|| !(((__GLIBC__ == 2 && __GLIBC_MINOR__ <= 1) && !defined __UCLIBC__) \
|| defined __sun)
if (cd2 != (iconv_t)(-1))
res2 = iconv (cd2, NULL, NULL, &out2ptr, &out2size);
else
# endif
res2 = 0;
do_final_flush2 = false;
incremented2 = true;
}
length = out2ptr - result;
grow = (length + extra_alloc > allocated / 2);
if (res2 == (size_t)(-1))
{
if (errno == E2BIG)
grow = true;
else if (errno == EINVAL)
break;
else if (errno == EILSEQ && handler != iconveh_error)
{
/* Error handling can produce up to 10 bytes of ASCII
output. But TO_CODESET may be UCS-2, UTF-16 or
UCS-4, so use CD2 here as well. */
char scratchbuf[10];
size_t scratchlen;
ucs4_t uc;
const char *inptr;
size_t insize;
size_t res;
if (incremented2)
{
if (u8_prev (&uc, (const uint8_t *) in2ptr,
(const uint8_t *) utf8buf)
== NULL)
abort ();
}
else
{
int n;
if (in2size == 0)
abort ();
n = u8_mbtouc_unsafe (&uc, (const uint8_t *) in2ptr,
in2size);
in2ptr += n;
in2size -= n;
}
if (handler == iconveh_escape_sequence)
{
static char hex[16] = "0123456789ABCDEF";
scratchlen = 0;
scratchbuf[scratchlen++] = '\\';
if (uc < 0x10000)
scratchbuf[scratchlen++] = 'u';
else
{
scratchbuf[scratchlen++] = 'U';
scratchbuf[scratchlen++] = hex[(uc>>28) & 15];
scratchbuf[scratchlen++] = hex[(uc>>24) & 15];
scratchbuf[scratchlen++] = hex[(uc>>20) & 15];
scratchbuf[scratchlen++] = hex[(uc>>16) & 15];
}
scratchbuf[scratchlen++] = hex[(uc>>12) & 15];
scratchbuf[scratchlen++] = hex[(uc>>8) & 15];
scratchbuf[scratchlen++] = hex[(uc>>4) & 15];
scratchbuf[scratchlen++] = hex[uc & 15];
}
else
{
scratchbuf[0] = '?';
scratchlen = 1;
}
inptr = scratchbuf;
insize = scratchlen;
if (cd2 != (iconv_t)(-1))
res = iconv (cd2,
(ICONV_CONST char **) &inptr, &insize,
&out2ptr, &out2size);
else
{
/* TO_CODESET is UTF-8. */
if (out2size >= insize)
{
memcpy (out2ptr, inptr, insize);
out2ptr += insize;
out2size -= insize;
inptr += insize;
insize = 0;
res = 0;
}
else
{
errno = E2BIG;
res = (size_t)(-1);
}
}
length = out2ptr - result;
if (res == (size_t)(-1) && errno == E2BIG)
{
char *memory;
allocated = 2 * allocated;
if (length + 1 + extra_alloc > allocated)
abort ();
if (result == initial_result)
memory = (char *) malloc (allocated);
else
memory = (char *) realloc (result, allocated);
if (memory == NULL)
{
if (result != initial_result)
free (result);
errno = ENOMEM;
return -1;
}
if (result == initial_result)
memcpy (memory, initial_result, length);
result = memory;
grow = false;
out2ptr = result + length;
out2size = allocated - extra_alloc - length;
if (cd2 != (iconv_t)(-1))
res = iconv (cd2,
(ICONV_CONST char **) &inptr,
&insize,
&out2ptr, &out2size);
else
{
/* TO_CODESET is UTF-8. */
if (!(out2size >= insize))
abort ();
memcpy (out2ptr, inptr, insize);
out2ptr += insize;
out2size -= insize;
inptr += insize;
insize = 0;
res = 0;
}
length = out2ptr - result;
}
# if !defined _LIBICONV_VERSION && !(defined __GLIBC__ && !defined __UCLIBC__)
/* Irix iconv() inserts a NUL byte if it cannot convert.
NetBSD iconv() inserts a question mark if it cannot
convert.
Only GNU libiconv and GNU libc are known to prefer
to fail rather than doing a lossy conversion. */
if (res != (size_t)(-1) && res > 0)
{
errno = EILSEQ;
res = (size_t)(-1);
}
# endif
if (res == (size_t)(-1))
{
/* Failure converting the ASCII replacement. */
if (result != initial_result)
{
int saved_errno = errno;
free (result);
errno = saved_errno;
}
return -1;
}
}
else
{
if (result != initial_result)
{
int saved_errno = errno;
free (result);
errno = saved_errno;
}
return -1;
}
}
if (!(in2size > 0
|| (in1size == 0 && !do_final_flush1 && do_final_flush2)))
break;
if (grow)
{
char *memory;
allocated = 2 * allocated;
if (result == initial_result)
memory = (char *) malloc (allocated);
else
memory = (char *) realloc (result, allocated);
if (memory == NULL)
{
if (result != initial_result)
free (result);
errno = ENOMEM;
return -1;
}
if (result == initial_result)
memcpy (memory, initial_result, length);
result = memory;
}
}
/* Move the remaining bytes to the beginning of utf8buf. */
if (in2size > 0)
memmove (utf8buf, in2ptr, in2size);
utf8len = in2size;
}
void
u8_possible_linebreaks (const uint8_t *s, size_t n, const char *encoding, char *p)
{
int LBP_AI_REPLACEMENT = (is_cjk_encoding (encoding) ? LBP_ID : LBP_AL);
const uint8_t *s_end = s + n;
int last_prop = LBP_BK; /* line break property of last non-space character */
char *seen_space = NULL; /* Was a space seen after the last non-space character? */
char *seen_space2 = NULL; /* At least two spaces after the last non-space? */
/* Don't break inside multibyte characters. */
memset (p, UC_BREAK_PROHIBITED, n);
while (s < s_end)
{
ucs4_t uc;
int count = u8_mbtouc_unsafe (&uc, s, s_end - s);
int prop = unilbrkprop_lookup (uc);
if (prop == LBP_BK)
{
/* Mandatory break. */
*p = UC_BREAK_MANDATORY;
last_prop = LBP_BK;
seen_space = NULL;
seen_space2 = NULL;
}
else
{
char *q;
/* Resolve property values whose behaviour is not fixed. */
switch (prop)
{
case LBP_AI:
/* Resolve ambiguous. */
prop = LBP_AI_REPLACEMENT;
break;
case LBP_CB:
/* This is arbitrary. */
prop = LBP_ID;
break;
case LBP_SA:
/* We don't handle complex scripts yet.
Treat LBP_SA like LBP_XX. */
case LBP_XX:
/* This is arbitrary. */
prop = LBP_AL;
break;
}
/* Deal with spaces and combining characters. */
q = p;
if (prop == LBP_SP)
{
/* Don't break just before a space. */
*p = UC_BREAK_PROHIBITED;
seen_space2 = seen_space;
seen_space = p;
}
else if (prop == LBP_ZW)
{
/* Don't break just before a zero-width space. */
*p = UC_BREAK_PROHIBITED;
last_prop = LBP_ZW;
seen_space = NULL;
seen_space2 = NULL;
}
else if (prop == LBP_CM)
{
/* Don't break just before a combining character, except immediately after a
zero-width space. */
if (last_prop == LBP_ZW)
{
/* Break after zero-width space. */
*p = UC_BREAK_POSSIBLE;
/* A combining character turns a preceding space into LBP_ID. */
last_prop = LBP_ID;
}
else
{
*p = UC_BREAK_PROHIBITED;
/* A combining character turns a preceding space into LBP_ID. */
if (seen_space != NULL)
{
q = seen_space;
seen_space = seen_space2;
prop = LBP_ID;
goto lookup_via_table;
}
}
}
else
{
lookup_via_table:
/* prop must be usable as an index for table 7.3 of UTR #14. */
if (!(prop >= 0 && prop < sizeof (unilbrk_table) / sizeof (unilbrk_table[0])))
abort ();
if (last_prop == LBP_BK)
{
/* Don't break at the beginning of a line. */
*q = UC_BREAK_PROHIBITED;
}
else if (last_prop == LBP_ZW)
{
/* Break after zero-width space. */
*q = UC_BREAK_POSSIBLE;
}
else
{
switch (unilbrk_table [last_prop] [prop])
{
case D:
*q = UC_BREAK_POSSIBLE;
break;
case I:
*q = (seen_space != NULL ? UC_BREAK_POSSIBLE : UC_BREAK_PROHIBITED);
break;
case P:
*q = UC_BREAK_PROHIBITED;
break;
default:
abort ();
}
}
last_prop = prop;
seen_space = NULL;
seen_space2 = NULL;
}
}
s += count;
p += count;
}
}
int
u8_width_linebreaks (const uint8_t *s, size_t n,
int width, int start_column, int at_end_columns,
const char *o, const char *encoding,
char *p)
{
const uint8_t *s_end;
char *last_p;
int last_column;
int piece_width;
u8_possible_linebreaks (s, n, encoding, p);
s_end = s + n;
last_p = NULL;
last_column = start_column;
piece_width = 0;
while (s < s_end)
{
ucs4_t uc;
int count = u8_mbtouc_unsafe (&uc, s, s_end - s);
/* Respect the override. */
if (o != NULL && *o != UC_BREAK_UNDEFINED)
*p = *o;
if (*p == UC_BREAK_POSSIBLE || *p == UC_BREAK_MANDATORY)
{
/* An atomic piece of text ends here. */
if (last_p != NULL && last_column + piece_width > width)
{
/* Insert a line break. */
*last_p = UC_BREAK_POSSIBLE;
last_column = 0;
}
}
if (*p == UC_BREAK_MANDATORY)
{
/* uc is a line break character. */
/* Start a new piece at column 0. */
last_p = NULL;
last_column = 0;
piece_width = 0;
}
else
{
/* uc is not a line break character. */
int w;
if (*p == UC_BREAK_POSSIBLE)
{
/* Start a new piece. */
last_p = p;
last_column += piece_width;
piece_width = 0;
/* No line break for the moment, may be turned into
UC_BREAK_POSSIBLE later, via last_p. */
}
*p = UC_BREAK_PROHIBITED;
w = uc_width (uc, encoding);
if (w >= 0) /* ignore control characters in the string */
piece_width += w;
}
s += count;
p += count;
if (o != NULL)
o += count;
}
/* The last atomic piece of text ends here. */
if (last_p != NULL && last_column + piece_width + at_end_columns > width)
{
/* Insert a line break. */
*last_p = UC_BREAK_POSSIBLE;
last_column = 0;
}
return last_column + piece_width;
}
