diff options
Diffstat (limited to 'gdb/parse.c')
| -rw-r--r-- | gdb/parse.c | 395 |
1 files changed, 202 insertions, 193 deletions
diff --git a/gdb/parse.c b/gdb/parse.c index 86267ea6730..9876817b6df 100644 --- a/gdb/parse.c +++ b/gdb/parse.c @@ -3,21 +3,22 @@ Modified from expread.y by the Department of Computer Science at the State University of New York at Buffalo, 1991. -This file is part of GDB. + This file is part of GDB. -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 of the License, or -(at your option) any later version. + 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 of the License, or + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + 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, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ /* Parse an expression from text in a string, and return the result as a struct expression pointer. @@ -27,7 +28,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ What is important here is that it can be built up sequentially during the process of parsing; the lower levels of the tree always come first in the result. */ - + #include <ctype.h> #include "defs.h" @@ -41,7 +42,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "language.h" #include "parser-defs.h" #include "gdbcmd.h" -#include "symfile.h" /* for overlay functions */ +#include "symfile.h" /* for overlay functions */ /* Global variables declared in parser-defs.h (and commented there). */ struct expression *expout; @@ -104,7 +105,7 @@ target_map_name_to_register (str, len) systems standard names can be context dependent (eg. $pc on a multiprocessor can be could be any of several PCs). */ #ifdef REGISTER_NAME_ALIAS_HOOK - i = REGISTER_NAME_ALIAS_HOOK (str, len); + i = REGISTER_NAME_ALIAS_HOOK (str, len); if (i >= 0) return i; #endif @@ -153,7 +154,7 @@ end_arglist () register struct funcall *call = funcall_chain; funcall_chain = call->next; arglist_len = call->arglist_len; - free ((PTR)call); + free ((PTR) call); return val; } @@ -168,7 +169,7 @@ free_funcalls () for (call = funcall_chain; call; call = next) { next = call->next; - free ((PTR)call); + free ((PTR) call); } } @@ -403,11 +404,11 @@ write_exp_msymbol (msymbol, text_symbol_type, data_symbol_type) if (overlay_debugging) addr = symbol_overlayed_address (addr, SYMBOL_BFD_SECTION (msymbol)); write_exp_elt_longcst ((LONGEST) addr); - + write_exp_elt_opcode (OP_LONG); write_exp_elt_opcode (UNOP_MEMVAL); - switch (msymbol -> type) + switch (msymbol->type) { case mst_text: case mst_file_text: @@ -431,26 +432,26 @@ write_exp_msymbol (msymbol, text_symbol_type, data_symbol_type) /* Recognize tokens that start with '$'. These include: - $regname A native register name or a "standard - register name". + $regname A native register name or a "standard + register name". - $variable A convenience variable with a name chosen - by the user. + $variable A convenience variable with a name chosen + by the user. - $digits Value history with index <digits>, starting - from the first value which has index 1. + $digits Value history with index <digits>, starting + from the first value which has index 1. - $$digits Value history with index <digits> relative - to the last value. I.E. $$0 is the last - value, $$1 is the one previous to that, $$2 - is the one previous to $$1, etc. + $$digits Value history with index <digits> relative + to the last value. I.E. $$0 is the last + value, $$1 is the one previous to that, $$2 + is the one previous to $$1, etc. - $ | $0 | $$0 The last value in the value history. + $ | $0 | $$0 The last value in the value history. - $$ An abbreviation for the second to the last - value in the value history, I.E. $$1 + $$ An abbreviation for the second to the last + value in the value history, I.E. $$1 - */ + */ void write_dollar_variable (str) @@ -459,8 +460,8 @@ write_dollar_variable (str) /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1) and $$digits (equivalent to $<-digits> if you could type that). */ - struct symbol * sym = NULL; - struct minimal_symbol * msym = NULL; + struct symbol *sym = NULL; + struct minimal_symbol *msym = NULL; int negate = 0; int i = 1; @@ -474,7 +475,7 @@ write_dollar_variable (str) if (i == str.length) { /* Just dollars (one or two) */ - i = - negate; + i = -negate; goto handle_last; } /* Is the rest of the token digits? */ @@ -485,14 +486,14 @@ write_dollar_variable (str) { i = atoi (str.ptr + 1 + negate); if (negate) - i = - i; + i = -i; goto handle_last; } - + /* Handle tokens that refer to machine registers: $ followed by a register name. */ - i = target_map_name_to_register( str.ptr + 1, str.length - 1 ); - if( i >= 0 ) + i = target_map_name_to_register (str.ptr + 1, str.length - 1); + if (i >= 0) goto handle_register; /* On HP-UX, certain system routines (millicode) have names beginning @@ -500,11 +501,11 @@ write_dollar_variable (str) calls on PA-RISC. Check for those, first. */ sym = lookup_symbol (copy_name (str), (struct block *) NULL, - VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL); + VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL); if (sym) { write_exp_elt_opcode (OP_VAR_VALUE); - write_exp_elt_block (block_found); /* set by lookup_symbol */ + write_exp_elt_block (block_found); /* set by lookup_symbol */ write_exp_elt_sym (sym); write_exp_elt_opcode (OP_VAR_VALUE); return; @@ -513,26 +514,26 @@ write_dollar_variable (str) if (msym) { write_exp_msymbol (msym, - lookup_function_type (builtin_type_int), - builtin_type_int); + lookup_function_type (builtin_type_int), + builtin_type_int); return; } - + /* Any other names starting in $ are debugger internal variables. */ write_exp_elt_opcode (OP_INTERNALVAR); write_exp_elt_intern (lookup_internalvar (copy_name (str) + 1)); - write_exp_elt_opcode (OP_INTERNALVAR); + write_exp_elt_opcode (OP_INTERNALVAR); return; - handle_last: +handle_last: write_exp_elt_opcode (OP_LAST); write_exp_elt_longcst ((LONGEST) i); write_exp_elt_opcode (OP_LAST); return; - handle_register: +handle_register: write_exp_elt_opcode (OP_REGISTER); write_exp_elt_longcst (i); - write_exp_elt_opcode (OP_REGISTER); + write_exp_elt_opcode (OP_REGISTER); return; } @@ -560,20 +561,21 @@ write_dollar_variable (str) Callers must free memory allocated for the output string TOKEN. */ -static const char coloncolon[2] = {':',':'}; +static const char coloncolon[2] = +{':', ':'}; struct symbol * parse_nested_classes_for_hpacc (name, len, token, class_prefix, argptr) - char * name; - int len; - char ** token; - int * class_prefix; - char ** argptr; + char *name; + int len; + char **token; + int *class_prefix; + char **argptr; { - /* Comment below comes from decode_line_1 which has very similar - code, which is called for "break" command parsing. */ - - /* We have what looks like a class or namespace + /* Comment below comes from decode_line_1 which has very similar + code, which is called for "break" command parsing. */ + + /* We have what looks like a class or namespace scope specification (A::B), possibly with many levels of namespaces or classes (A::B::C::D). @@ -593,18 +595,18 @@ parse_nested_classes_for_hpacc (name, len, token, class_prefix, argptr) consider *prefixes* of the string; there is no need to look up "B::C" separately as a symbol in the previous example. */ - register char * p; - char * start, * end; - char * prefix = NULL; - char * tmp; - struct symbol * sym_class = NULL; - struct symbol * sym_var = NULL; - struct type * t; + register char *p; + char *start, *end; + char *prefix = NULL; + char *tmp; + struct symbol *sym_class = NULL; + struct symbol *sym_var = NULL; + struct type *t; register int i; int colons_found = 0; int prefix_len = 0; int done = 0; - char * q; + char *q; /* Check for HP-compiled executable -- in other cases return NULL, and caller must default to standard GDB @@ -615,95 +617,100 @@ parse_nested_classes_for_hpacc (name, len, token, class_prefix, argptr) p = name; - /* Skip over whitespace and possible global "::" */ - while (*p && (*p == ' ' || *p == '\t')) p++; + /* Skip over whitespace and possible global "::" */ + while (*p && (*p == ' ' || *p == '\t')) + p++; if (p[0] == ':' && p[1] == ':') p += 2; - while (*p && (*p == ' ' || *p == '\t')) p++; - + while (*p && (*p == ' ' || *p == '\t')) + p++; + while (1) { /* Get to the end of the next namespace or class spec. */ /* If we're looking at some non-token, fail immediately */ start = p; if (!(isalpha (*p) || *p == '$' || *p == '_')) - return (struct symbol *) NULL; + return (struct symbol *) NULL; p++; - while (*p && (isalnum (*p) || *p == '$' || *p == '_')) p++; - - if (*p == '<') - { - /* If we have the start of a template specification, - scan right ahead to its end */ - q = find_template_name_end (p); - if (q) - p = q; - } - + while (*p && (isalnum (*p) || *p == '$' || *p == '_')) + p++; + + if (*p == '<') + { + /* If we have the start of a template specification, + scan right ahead to its end */ + q = find_template_name_end (p); + if (q) + p = q; + } + end = p; - /* Skip over "::" and whitespace for next time around */ - while (*p && (*p == ' ' || *p == '\t')) p++; + /* Skip over "::" and whitespace for next time around */ + while (*p && (*p == ' ' || *p == '\t')) + p++; if (p[0] == ':' && p[1] == ':') - p += 2; - while (*p && (*p == ' ' || *p == '\t')) p++; + p += 2; + while (*p && (*p == ' ' || *p == '\t')) + p++; - /* Done with tokens? */ + /* Done with tokens? */ if (!*p || !(isalpha (*p) || *p == '$' || *p == '_')) - done = 1; + done = 1; tmp = (char *) alloca (prefix_len + end - start + 3); if (prefix) - { - memcpy (tmp, prefix, prefix_len); - memcpy (tmp + prefix_len, coloncolon, 2); - memcpy (tmp + prefix_len + 2, start, end - start); - tmp[prefix_len + 2 + end - start] = '\000'; - } + { + memcpy (tmp, prefix, prefix_len); + memcpy (tmp + prefix_len, coloncolon, 2); + memcpy (tmp + prefix_len + 2, start, end - start); + tmp[prefix_len + 2 + end - start] = '\000'; + } else - { - memcpy (tmp, start, end - start); - tmp[end - start] = '\000'; - } - + { + memcpy (tmp, start, end - start); + tmp[end - start] = '\000'; + } + prefix = tmp; prefix_len = strlen (prefix); - + /* See if the prefix we have now is something we know about */ - if (!done) - { - /* More tokens to process, so this must be a class/namespace */ - sym_class = lookup_symbol (prefix, 0, STRUCT_NAMESPACE, - 0, (struct symtab **) NULL); - } + if (!done) + { + /* More tokens to process, so this must be a class/namespace */ + sym_class = lookup_symbol (prefix, 0, STRUCT_NAMESPACE, + 0, (struct symtab **) NULL); + } else - { - /* No more tokens, so try as a variable first */ - sym_var = lookup_symbol (prefix, 0, VAR_NAMESPACE, - 0, (struct symtab **) NULL); - /* If failed, try as class/namespace */ - if (!sym_var) - sym_class = lookup_symbol (prefix, 0, STRUCT_NAMESPACE, - 0, (struct symtab **) NULL); - } + { + /* No more tokens, so try as a variable first */ + sym_var = lookup_symbol (prefix, 0, VAR_NAMESPACE, + 0, (struct symtab **) NULL); + /* If failed, try as class/namespace */ + if (!sym_var) + sym_class = lookup_symbol (prefix, 0, STRUCT_NAMESPACE, + 0, (struct symtab **) NULL); + } if (sym_var || - (sym_class && - (t = check_typedef (SYMBOL_TYPE (sym_class)), - (TYPE_CODE (t) == TYPE_CODE_STRUCT - || TYPE_CODE (t) == TYPE_CODE_UNION)))) - { - /* We found a valid token */ - *token = (char *) xmalloc (prefix_len + 1 ); - memcpy (*token, prefix, prefix_len); - (*token)[prefix_len] = '\000'; - break; - } - - /* No variable or class/namespace found, no more tokens */ + (sym_class && + (t = check_typedef (SYMBOL_TYPE (sym_class)), + (TYPE_CODE (t) == TYPE_CODE_STRUCT + || TYPE_CODE (t) == TYPE_CODE_UNION)))) + { + /* We found a valid token */ + *token = (char *) xmalloc (prefix_len + 1); + memcpy (*token, prefix, prefix_len); + (*token)[prefix_len] = '\000'; + break; + } + + /* No variable or class/namespace found, no more tokens */ if (done) - return (struct symbol *) NULL; + return (struct symbol *) NULL; } /* Out of loop, so we must have found a valid token */ @@ -715,70 +722,72 @@ parse_nested_classes_for_hpacc (name, len, token, class_prefix, argptr) if (argptr) *argptr = done ? p : end; - return sym_var ? sym_var : sym_class; /* found */ + return sym_var ? sym_var : sym_class; /* found */ } char * find_template_name_end (p) - char * p; + char *p; { int depth = 1; int just_seen_right = 0; int just_seen_colon = 0; int just_seen_space = 0; - + if (!p || (*p != '<')) return 0; while (*++p) { switch (*p) - { - case '\'': case '\"': - case '{': case '}': - /* In future, may want to allow these?? */ - return 0; - case '<': - depth++; /* start nested template */ - if (just_seen_colon || just_seen_right || just_seen_space) - return 0; /* but not after : or :: or > or space */ - break; - case '>': - if (just_seen_colon || just_seen_right) - return 0; /* end a (nested?) template */ - just_seen_right = 1; /* but not after : or :: */ - if (--depth == 0) /* also disallow >>, insist on > > */ - return ++p; /* if outermost ended, return */ - break; - case ':': - if (just_seen_space || (just_seen_colon > 1)) - return 0; /* nested class spec coming up */ - just_seen_colon++; /* we allow :: but not :::: */ - break; - case ' ': - break; - default: - if (!((*p >= 'a' && *p <= 'z') || /* allow token chars */ - (*p >= 'A' && *p <= 'Z') || - (*p >= '0' && *p <= '9') || - (*p == '_') || (*p == ',') || /* commas for template args */ - (*p == '&') || (*p == '*') || /* pointer and ref types */ - (*p == '(') || (*p == ')') || /* function types */ - (*p == '[') || (*p == ']') )) /* array types */ - return 0; - } + { + case '\'': + case '\"': + case '{': + case '}': + /* In future, may want to allow these?? */ + return 0; + case '<': + depth++; /* start nested template */ + if (just_seen_colon || just_seen_right || just_seen_space) + return 0; /* but not after : or :: or > or space */ + break; + case '>': + if (just_seen_colon || just_seen_right) + return 0; /* end a (nested?) template */ + just_seen_right = 1; /* but not after : or :: */ + if (--depth == 0) /* also disallow >>, insist on > > */ + return ++p; /* if outermost ended, return */ + break; + case ':': + if (just_seen_space || (just_seen_colon > 1)) + return 0; /* nested class spec coming up */ + just_seen_colon++; /* we allow :: but not :::: */ + break; + case ' ': + break; + default: + if (!((*p >= 'a' && *p <= 'z') || /* allow token chars */ + (*p >= 'A' && *p <= 'Z') || + (*p >= '0' && *p <= '9') || + (*p == '_') || (*p == ',') || /* commas for template args */ + (*p == '&') || (*p == '*') || /* pointer and ref types */ + (*p == '(') || (*p == ')') || /* function types */ + (*p == '[') || (*p == ']'))) /* array types */ + return 0; + } if (*p != ' ') - just_seen_space = 0; + just_seen_space = 0; if (*p != ':') - just_seen_colon = 0; + just_seen_colon = 0; if (*p != '>') - just_seen_right = 0; + just_seen_right = 0; } return 0; } + - /* Return a null-terminated temporary copy of the name of a string token. */ @@ -799,7 +808,7 @@ prefixify_expression (expr) register struct expression *expr; { register int len = - sizeof (struct expression) + EXP_ELEM_TO_BYTES (expr->nelts); + sizeof (struct expression) + EXP_ELEM_TO_BYTES (expr->nelts); register struct expression *temp; register int inpos = expr->nelts, outpos = 0; @@ -851,9 +860,9 @@ length_of_subexp (expr, endpos) break; case OP_COMPLEX: - oplen = 1; + oplen = 1; args = 2; - break; + break; case OP_FUNCALL: case OP_F77_UNDETERMINED_ARGLIST: @@ -866,9 +875,9 @@ length_of_subexp (expr, endpos) oplen = 3; break; - case BINOP_VAL: - case UNOP_CAST: - case UNOP_MEMVAL: + case BINOP_VAL: + case UNOP_CAST: + case UNOP_MEMVAL: oplen = 3; args = 1; break; @@ -918,9 +927,9 @@ length_of_subexp (expr, endpos) break; /* Modula-2 */ - case MULTI_SUBSCRIPT: + case MULTI_SUBSCRIPT: oplen = 3; - args = 1 + longest_to_int (expr->elts[endpos- 2].longconst); + args = 1 + longest_to_int (expr->elts[endpos - 2].longconst); break; case BINOP_ASSIGN_MODIFY: @@ -991,9 +1000,9 @@ prefixify_subexp (inexpr, outexpr, inend, outbeg) break; case OP_COMPLEX: - oplen = 1; - args = 2; - break; + oplen = 1; + args = 2; + break; case OP_FUNCALL: case OP_F77_UNDETERMINED_ARGLIST: @@ -1020,8 +1029,8 @@ prefixify_subexp (inexpr, outexpr, inend, outbeg) case UNOP_ODD: case UNOP_ORD: case UNOP_TRUNC: - oplen=1; - args=1; + oplen = 1; + args = 1; break; case STRUCTOP_STRUCT: @@ -1062,7 +1071,7 @@ prefixify_subexp (inexpr, outexpr, inend, outbeg) break; /* Modula-2 */ - case MULTI_SUBSCRIPT: + case MULTI_SUBSCRIPT: oplen = 3; args = 1 + longest_to_int (inexpr->elts[inend - 2].longconst); break; @@ -1198,7 +1207,7 @@ parse_expression (string) /* Stuff for maintaining a stack of types. Currently just used by C, but probably useful for any language which declares its types "backwards". */ -void +void push_type (tp) enum type_pieces tp; { @@ -1224,7 +1233,7 @@ push_type_int (n) type_stack[type_stack_depth++].int_val = n; } -enum type_pieces +enum type_pieces pop_type () { if (type_stack_depth) @@ -1275,7 +1284,7 @@ follow_types (follow_type) create_array_type ((struct type *) NULL, follow_type, range_type); if (array_size < 0) - TYPE_ARRAY_UPPER_BOUND_TYPE(follow_type) + TYPE_ARRAY_UPPER_BOUND_TYPE (follow_type) = BOUND_CANNOT_BE_DETERMINED; break; case tp_function: @@ -1372,10 +1381,10 @@ _initialize_parse () register_gdbarch_swap (NULL, 0, build_parse); add_show_from_set ( - add_set_cmd ("expressiondebug", class_maintenance, var_zinteger, - (char *)&expressiondebug, - "Set expression debugging.\n\ + add_set_cmd ("expressiondebug", class_maintenance, var_zinteger, + (char *) &expressiondebug, + "Set expression debugging.\n\ When non-zero, the internal representation of expressions will be printed.", - &setlist), - &showlist); + &setlist), + &showlist); } |