- debug_undef (lineno, (const char *) node->name);
-}
-
-/* Parse a '\uNNNN' or '\UNNNNNNNN' sequence.
-
- [lex.charset]: The character designated by the universal-character-name
- \UNNNNNNNN is that character whose character short name in ISO/IEC 10646
- is NNNNNNNN; the character designated by the universal-character-name
- \uNNNN is that character whose character short name in ISO/IEC 10646 is
- 0000NNNN. If the hexadecimal value for a universal character name is
- less than 0x20 or in the range 0x7F-0x9F (inclusive), or if the
- universal character name designates a character in the basic source
- character set, then the program is ill-formed.
-
- We assume that wchar_t is Unicode, so we don't need to do any
- mapping. Is this ever wrong? */
-
-static const char *
-read_ucs (p, limit, cptr, length)
- const char *p;
- const char *limit;
- unsigned int *cptr;
- int length;
-{
- unsigned int code = 0;
- int c;
-
- for (; length; --length)
- {
- if (p >= limit)
- {
- error ("incomplete universal-character-name");
- break;
- }
-
- c = *p++;
- if (! ISXDIGIT (c))
- {
- error ("non hex digit '%c' in universal-character-name", c);
- p--;
- break;
- }
-
- code <<= 4;
- if (c >= 'a' && c <= 'f')
- code += c - 'a' + 10;
- if (c >= 'A' && c <= 'F')
- code += c - 'A' + 10;
- if (c >= '0' && c <= '9')
- code += c - '0';
- }
-
-#ifdef TARGET_EBCDIC
- sorry ("universal-character-name on EBCDIC target");
- *cptr = 0x3f; /* EBCDIC invalid character */
- return p;
-#endif
-
- if (code > 0x9f && !(code & 0x80000000))
- /* True extended character, OK. */;
- else if (code >= 0x20 && code < 0x7f)
- {
- /* ASCII printable character. The C character set consists of all of
- these except $, @ and `. We use hex escapes so that this also
- works with EBCDIC hosts. */
- if (code != 0x24 && code != 0x40 && code != 0x60)
- error ("universal-character-name used for '%c'", code);
- }
- else
- error ("invalid universal-character-name");
-
- *cptr = code;
- return p;
-}
-
-/* Read an escape sequence and write its character equivalent into *CPTR.
- P is the input pointer, which is just after the backslash. LIMIT
- is how much text we have.
- Returns the updated input pointer. */
-
-static const char *
-readescape (p, limit, cptr)
- const char *p;
- const char *limit;
- unsigned int *cptr;
-{
- unsigned int c, code, count;
- unsigned firstdig = 0;
- int nonnull;
-
- if (p == limit)
- {
- /* cpp has already issued an error for this. */
- *cptr = 0;
- return p;
- }
-
- c = *p++;
-
- switch (c)
- {
- case 'x':
- if (warn_traditional && !in_system_header)
- warning ("the meaning of `\\x' varies with -traditional");
-
- if (flag_traditional)
- {
- *cptr = 'x';
- return p;
- }
-
- code = 0;
- count = 0;
- nonnull = 0;
- while (p < limit)
- {
- c = *p++;
- if (! ISXDIGIT (c))
- {
- p--;
- break;
- }
- code *= 16;
- if (c >= 'a' && c <= 'f')
- code += c - 'a' + 10;
- if (c >= 'A' && c <= 'F')
- code += c - 'A' + 10;
- if (c >= '0' && c <= '9')
- code += c - '0';
- if (code != 0 || count != 0)
- {
- if (count == 0)
- firstdig = code;
- count++;
- }
- nonnull = 1;
- }
- if (! nonnull)
- {
- warning ("\\x used with no following hex digits");
- *cptr = 'x';
- return p;
- }
- else if (count == 0)
- /* Digits are all 0's. Ok. */
- ;
- else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
- || (count > 1
- && (((unsigned)1
- << (TYPE_PRECISION (integer_type_node)
- - (count - 1) * 4))
- <= firstdig)))
- pedwarn ("hex escape out of range");
- *cptr = code;
- return p;
-
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7':
- code = 0;
- for (count = 0; count < 3; count++)
- {
- if (c < '0' || c > '7')
- {
- p--;
- break;
- }
- code = (code * 8) + (c - '0');
- if (p == limit)
- break;
- c = *p++;
- }
-
- if (count == 3)
- p--;
-
- *cptr = code;
- return p;
-
- case '\\': case '\'': case '"': case '?':
- *cptr = c;
- return p;
-
- case 'n': *cptr = TARGET_NEWLINE; return p;
- case 't': *cptr = TARGET_TAB; return p;
- case 'r': *cptr = TARGET_CR; return p;
- case 'f': *cptr = TARGET_FF; return p;
- case 'b': *cptr = TARGET_BS; return p;
- case 'v': *cptr = TARGET_VT; return p;
- case 'a':
- if (warn_traditional && !in_system_header)
- warning ("the meaning of '\\a' varies with -traditional");
- *cptr = flag_traditional ? c : TARGET_BELL;
- return p;
-
- /* Warnings and support checks handled by read_ucs(). */
- case 'u': case 'U':
- if (c_language != clk_cplusplus && !flag_isoc99)
- break;
-
- if (warn_traditional && !in_system_header)
- warning ("the meaning of '\\%c' varies with -traditional", c);
-
- return read_ucs (p, limit, cptr, c == 'u' ? 4 : 8);
-
- case 'e': case 'E':
- if (pedantic)
- pedwarn ("non-ISO-standard escape sequence, '\\%c'", c);
- *cptr = TARGET_ESC; return p;
-
- /* '\(', etc, are used at beginning of line to avoid confusing Emacs.
- '\%' is used to prevent SCCS from getting confused. */
- case '(': case '{': case '[': case '%':
- if (pedantic)
- pedwarn ("unknown escape sequence '\\%c'", c);
- *cptr = c;
- return p;
- }
-
- if (ISGRAPH (c))
- pedwarn ("unknown escape sequence '\\%c'", c);
- else
- pedwarn ("unknown escape sequence: '\\' followed by char 0x%x", c);
-
- *cptr = c;
- return p;
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