* c-exp.y (yylex): Add tempbuf, tempbufindex, and tempbufsize,
which together maintain a dynamically expandable static buffer for the lexer to use when translating C strings to their internal form (other future uses possible). Fix parsing of C style strings to do the normal C style input conversions of escaped character sequences. * valops.c (value_string): Remove translation of escaped character sequences, now done in C expression parser.
This commit is contained in:
Fred Fish
parent
0d44b3d1f0
commit
bac89d6ca8
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@ -1,5 +1,13 @@
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Mon Nov 23 11:14:15 1992 Fred Fish (fnf@cygnus.com)
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* c-exp.y (yylex): Add tempbuf, tempbufindex, and tempbufsize,
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which together maintain a dynamically expandable static buffer
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for the lexer to use when translating C strings to their internal
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form (other future uses possible). Fix parsing of C style strings
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to do the normal C style input conversions of escaped character
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sequences.
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* valops.c (value_string): Remove translation of escaped
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character sequences, now done in C expression parser.
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* language.h (PRINT_LITERAL_FORM): New macro that takes character
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and decides if it should be printed in literal form or some other
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form, based on it's ASCII value and setting of sevenbit_strings.
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74
gdb/c-exp.y
74
gdb/c-exp.y
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@ -1079,11 +1079,15 @@ const static struct token tokentab2[] =
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int
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yylex ()
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{
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register int c;
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register int namelen;
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register unsigned i;
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register char *tokstart;
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int c;
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int namelen;
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unsigned int i;
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char *tokstart;
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char *tokptr;
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int tempbufindex;
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static char *tempbuf;
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static int tempbufsize;
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retry:
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tokstart = lexptr;
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@ -1250,21 +1254,55 @@ yylex ()
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return c;
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case '"':
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for (namelen = 1; (c = tokstart[namelen]) != '"'; namelen++)
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if (c == '\\')
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/* Build the gdb internal form of the input string in tempbuf,
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translating any standard C escape forms seen. Note that the
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buffer is null byte terminated *only* for the convenience of
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debugging gdb itself and printing the buffer contents when
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the buffer contains no embedded nulls. Gdb does not depend
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upon the buffer being null byte terminated, it uses the length
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string instead. This allows gdb to handle C strings (as well
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as strings in other languages) with embedded null bytes */
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tokptr = ++tokstart;
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tempbufindex = 0;
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do {
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/* Grow the static temp buffer if necessary, including allocating
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the first one on demand. */
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if (tempbufindex + 1 >= tempbufsize)
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{
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c = tokstart[++namelen];
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if (c >= '0' && c <= '9')
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{
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c = tokstart[++namelen];
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if (c >= '0' && c <= '9')
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c = tokstart[++namelen];
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}
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tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
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}
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yylval.sval.ptr = tokstart + 1;
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yylval.sval.length = namelen - 1;
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lexptr += namelen + 1;
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return STRING;
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switch (*tokptr)
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{
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case '\0':
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case '"':
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/* Do nothing, loop will terminate. */
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break;
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case '\\':
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tokptr++;
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c = parse_escape (&tokptr);
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if (c == -1)
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{
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continue;
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}
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tempbuf[tempbufindex++] = c;
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break;
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default:
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tempbuf[tempbufindex++] = *tokptr++;
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break;
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}
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} while ((*tokptr != '"') && (*tokptr != '\0'));
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if (*tokptr++ != '"')
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{
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error ("Unterminated string in expression.");
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}
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tempbuf[tempbufindex] = '\0'; /* See note above */
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yylval.sval.ptr = tempbuf;
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yylval.sval.length = tempbufindex;
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lexptr = tokptr;
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return (STRING);
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}
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if (!(c == '_' || c == '$'
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78
gdb/valops.c
78
gdb/valops.c
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@ -43,7 +43,7 @@ static value
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search_struct_field PARAMS ((char *, value, int, struct type *, int));
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static value
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search_struct_method PARAMS ((char *, value, value *, int, int *,
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search_struct_method PARAMS ((char *, value *, value *, int, int *,
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struct type *));
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static int
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@ -234,7 +234,7 @@ value_assign (toval, fromval)
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fromval = value_cast (REGISTER_VIRTUAL_TYPE (regno), fromval);
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memcpy (virtual_buffer, VALUE_CONTENTS (fromval),
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REGISTER_VIRTUAL_SIZE (regno));
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target_convert_from_virtual (regno, virtual_buffer, raw_buffer);
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REGISTER_CONVERT_TO_RAW (regno, virtual_buffer, raw_buffer);
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use_buffer = REGISTER_RAW_SIZE (regno);
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}
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@ -913,7 +913,8 @@ call_function_by_hand (function, nargs, args)
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Call the function malloc in the inferior to get space for it,
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then copy the data into that space
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and then return the address with type char *.
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PTR points to the string constant data; LEN is number of characters. */
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PTR points to the string constant data; LEN is number of characters.
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Note that the string may contain embedded null bytes. */
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value
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value_string (ptr, len)
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@ -923,36 +924,11 @@ value_string (ptr, len)
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register value val;
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register struct symbol *sym;
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value blocklen;
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register char *copy = (char *) alloca (len + 1);
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char *i = ptr;
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register char *o = copy, *ibeg = ptr;
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register int c;
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/* Copy the string into COPY, processing escapes.
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We could not conveniently process them in the parser
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because the string there wants to be a substring of the input. */
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while (i - ibeg < len)
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{
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c = *i++;
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if (c == '\\')
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{
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c = parse_escape (&i);
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if (c == -1)
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continue;
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}
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*o++ = c;
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}
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*o = 0;
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/* Get the length of the string after escapes are processed. */
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len = o - copy;
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/* Find the address of malloc in the inferior. */
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sym = lookup_symbol ("malloc", 0, VAR_NAMESPACE, 0, NULL);
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if (sym != 0)
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if (sym != NULL)
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{
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if (SYMBOL_CLASS (sym) != LOC_BLOCK)
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error ("\"malloc\" exists in this program but is not a function.");
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@ -973,9 +949,9 @@ value_string (ptr, len)
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blocklen = value_from_longest (builtin_type_int, (LONGEST) (len + 1));
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val = call_function_by_hand (val, 1, &blocklen);
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if (value_zerop (val))
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if (value_logical_not (val))
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error ("No memory available for string constant.");
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write_memory (value_as_pointer (val), copy, len + 1);
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write_memory (value_as_pointer (val), ptr, len + 1);
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VALUE_TYPE (val) = lookup_pointer_type (builtin_type_char);
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return val;
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}
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@ -1038,6 +1014,7 @@ search_struct_field (name, arg1, offset, type, looking_for_baseclass)
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if (BASETYPE_VIA_VIRTUAL (type, i))
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{
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value v2;
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/* Fix to use baseclass_offset instead. FIXME */
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baseclass_addr (type, i, VALUE_CONTENTS (arg1) + offset,
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&v2, (int *)NULL);
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if (v2 == 0)
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@ -1065,9 +1042,9 @@ search_struct_field (name, arg1, offset, type, looking_for_baseclass)
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If found, return value, else return NULL. */
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static value
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search_struct_method (name, arg1, args, offset, static_memfuncp, type)
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search_struct_method (name, arg1p, args, offset, static_memfuncp, type)
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char *name;
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register value arg1, *args;
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register value *arg1p, *args;
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int offset, *static_memfuncp;
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register struct type *type;
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{
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@ -1092,10 +1069,10 @@ search_struct_method (name, arg1, args, offset, static_memfuncp, type)
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TYPE_FN_FIELD_ARGS (f, j), args))
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{
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if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
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return (value)value_virtual_fn_field (arg1, f, j, type);
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return (value)value_virtual_fn_field (arg1p, f, j, type, offset);
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if (TYPE_FN_FIELD_STATIC_P (f, j) && static_memfuncp)
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*static_memfuncp = 1;
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return (value)value_fn_field (f, j);
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return (value)value_fn_field (arg1p, f, j, type, offset);
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}
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j--;
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}
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@ -1104,25 +1081,28 @@ search_struct_method (name, arg1, args, offset, static_memfuncp, type)
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for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
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{
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value v, v2;
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value v;
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int base_offset;
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if (BASETYPE_VIA_VIRTUAL (type, i))
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{
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baseclass_addr (type, i, VALUE_CONTENTS (arg1) + offset,
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&v2, (int *)NULL);
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if (v2 == 0)
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base_offset =
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baseclass_offset (type, i, *arg1p, offset);
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if (base_offset == -1)
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error ("virtual baseclass botch");
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base_offset = 0;
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}
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else
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{
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v2 = arg1;
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base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8;
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}
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v = search_struct_method (name, v2, args, base_offset,
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v = search_struct_method (name, arg1p, args, base_offset + offset,
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static_memfuncp, TYPE_BASECLASS (type, i));
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if (v) return v;
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if (v)
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{
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/* FIXME-bothner: Why is this commented out? Why is it here? */
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/* *arg1p = arg1_tmp;*/
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return v;
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}
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}
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return NULL;
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}
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@ -1193,7 +1173,7 @@ value_struct_elt (argp, args, name, static_memfuncp, err)
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if (destructor_name_p (name, t))
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error ("Cannot get value of destructor");
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v = search_struct_method (name, *argp, args, 0, static_memfuncp, t);
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v = search_struct_method (name, argp, args, 0, static_memfuncp, t);
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if (v == 0)
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{
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@ -1210,8 +1190,9 @@ value_struct_elt (argp, args, name, static_memfuncp, err)
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if (!args[1])
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{
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/* destructors are a special case. */
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return (value)value_fn_field (TYPE_FN_FIELDLIST1 (t, 0),
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TYPE_FN_FIELDLIST_LENGTH (t, 0));
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return (value)value_fn_field (NULL, TYPE_FN_FIELDLIST1 (t, 0),
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TYPE_FN_FIELDLIST_LENGTH (t, 0),
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0, 0);
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}
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else
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{
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@ -1219,7 +1200,7 @@ value_struct_elt (argp, args, name, static_memfuncp, err)
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}
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}
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else
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v = search_struct_method (name, *argp, args, 0, static_memfuncp, t);
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v = search_struct_method (name, argp, args, 0, static_memfuncp, t);
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if (v == 0)
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{
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@ -1414,7 +1395,8 @@ value_struct_elt_for_reference (domain, offset, curtype, name, intype)
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(lookup_reference_type
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(lookup_member_type (TYPE_FN_FIELD_TYPE (f, j),
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domain)),
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(LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
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(LONGEST) METHOD_PTR_FROM_VOFFSET
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(TYPE_FN_FIELD_VOFFSET (f, j)));
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}
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else
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{
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