/* Pascal language support routines for GDB, the GNU debugger. Copyright (C) 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* This file is derived from c-lang.c */ #include "defs.h" #include "gdb_string.h" #include "symtab.h" #include "gdbtypes.h" #include "expression.h" #include "parser-defs.h" #include "language.h" #include "p-lang.h" #include "valprint.h" #include "value.h" #include <ctype.h> extern void _initialize_pascal_language (void); /* Determines if type TYPE is a pascal string type. Returns 1 if the type is a known pascal type This function is used by p-valprint.c code to allow better string display. If it is a pascal string type, then it also sets info needed to get the length and the data of the string length_pos, length_size and string_pos are given in bytes. char_size gives the element size in bytes. FIXME: if the position or the size of these fields are not multiple of TARGET_CHAR_BIT then the results are wrong but this does not happen for Free Pascal nor for GPC. */ int is_pascal_string_type (struct type *type,int *length_pos, int *length_size, int *string_pos, int *char_size, char **arrayname) { if (TYPE_CODE (type) == TYPE_CODE_STRUCT) { /* Old Borland type pascal strings from Free Pascal Compiler. */ /* Two fields: length and st. */ if (TYPE_NFIELDS (type) == 2 && strcmp (TYPE_FIELDS (type)[0].name, "length") == 0 && strcmp (TYPE_FIELDS (type)[1].name, "st") == 0) { if (length_pos) *length_pos = TYPE_FIELD_BITPOS (type, 0) / TARGET_CHAR_BIT; if (length_size) *length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)); if (string_pos) *string_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT; if (char_size) *char_size = 1; if (arrayname) *arrayname = TYPE_FIELDS (type)[1].name; return 2; }; /* GNU pascal strings. */ /* Three fields: Capacity, length and schema$ or _p_schema. */ if (TYPE_NFIELDS (type) == 3 && strcmp (TYPE_FIELDS (type)[0].name, "Capacity") == 0 && strcmp (TYPE_FIELDS (type)[1].name, "length") == 0) { if (length_pos) *length_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT; if (length_size) *length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 1)); if (string_pos) *string_pos = TYPE_FIELD_BITPOS (type, 2) / TARGET_CHAR_BIT; /* FIXME: how can I detect wide chars in GPC ?? */ if (char_size) *char_size = 1; if (arrayname) *arrayname = TYPE_FIELDS (type)[2].name; return 3; }; } return 0; } static void pascal_one_char (int, struct ui_file *, int *); /* Print the character C on STREAM as part of the contents of a literal string. In_quotes is reset to 0 if a char is written with #4 notation */ static void pascal_one_char (int c, struct ui_file *stream, int *in_quotes) { c &= 0xFF; /* Avoid sign bit follies */ if ((c == '\'') || (PRINT_LITERAL_FORM (c))) { if (!(*in_quotes)) fputs_filtered ("'", stream); *in_quotes = 1; if (c == '\'') { fputs_filtered ("''", stream); } else fprintf_filtered (stream, "%c", c); } else { if (*in_quotes) fputs_filtered ("'", stream); *in_quotes = 0; fprintf_filtered (stream, "#%d", (unsigned int) c); } } static void pascal_emit_char (int c, struct ui_file *stream, int quoter); /* Print the character C on STREAM as part of the contents of a literal string whose delimiter is QUOTER. Note that that format for printing characters and strings is language specific. */ static void pascal_emit_char (int c, struct ui_file *stream, int quoter) { int in_quotes = 0; pascal_one_char (c, stream, &in_quotes); if (in_quotes) fputs_filtered ("'", stream); } void pascal_printchar (int c, struct ui_file *stream) { int in_quotes = 0; pascal_one_char (c, stream, &in_quotes); if (in_quotes) fputs_filtered ("'", stream); } /* Print the character string STRING, printing at most LENGTH characters. Printing stops early if the number hits print_max; repeat counts are printed as appropriate. Print ellipses at the end if we had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */ void pascal_printstr (struct ui_file *stream, const gdb_byte *string, unsigned int length, int width, int force_ellipses) { unsigned int i; unsigned int things_printed = 0; int in_quotes = 0; int need_comma = 0; /* If the string was not truncated due to `set print elements', and the last byte of it is a null, we don't print that, in traditional C style. */ if ((!force_ellipses) && length > 0 && string[length - 1] == '\0') length--; if (length == 0) { fputs_filtered ("''", stream); return; } for (i = 0; i < length && things_printed < print_max; ++i) { /* Position of the character we are examining to see whether it is repeated. */ unsigned int rep1; /* Number of repetitions we have detected so far. */ unsigned int reps; QUIT; if (need_comma) { fputs_filtered (", ", stream); need_comma = 0; } rep1 = i + 1; reps = 1; while (rep1 < length && string[rep1] == string[i]) { ++rep1; ++reps; } if (reps > repeat_count_threshold) { if (in_quotes) { if (inspect_it) fputs_filtered ("\\', ", stream); else fputs_filtered ("', ", stream); in_quotes = 0; } pascal_printchar (string[i], stream); fprintf_filtered (stream, " <repeats %u times>", reps); i = rep1 - 1; things_printed += repeat_count_threshold; need_comma = 1; } else { int c = string[i]; if ((!in_quotes) && (PRINT_LITERAL_FORM (c))) { if (inspect_it) fputs_filtered ("\\'", stream); else fputs_filtered ("'", stream); in_quotes = 1; } pascal_one_char (c, stream, &in_quotes); ++things_printed; } } /* Terminate the quotes if necessary. */ if (in_quotes) { if (inspect_it) fputs_filtered ("\\'", stream); else fputs_filtered ("'", stream); } if (force_ellipses || i < length) fputs_filtered ("...", stream); } /* Create a fundamental Pascal type using default reasonable for the current target machine. Some object/debugging file formats (DWARF version 1, COFF, etc) do not define fundamental types such as "int" or "double". Others (stabs or DWARF version 2, etc) do define fundamental types. For the formats which don't provide fundamental types, gdb can create such types using this function. FIXME: Some compilers distinguish explicitly signed integral types (signed short, signed int, signed long) from "regular" integral types (short, int, long) in the debugging information. There is some dis- agreement as to how useful this feature is. In particular, gcc does not support this. Also, only some debugging formats allow the distinction to be passed on to a debugger. For now, we always just use "short", "int", or "long" as the type name, for both the implicit and explicitly signed types. This also makes life easier for the gdb test suite since we don't have to account for the differences in output depending upon what the compiler and debugging format support. We will probably have to re-examine the issue when gdb starts taking it's fundamental type information directly from the debugging information supplied by the compiler. fnf@cygnus.com */ /* Note there might be some discussion about the choosen correspondance because it mainly reflects Free Pascal Compiler setup for now PM */ struct type * pascal_create_fundamental_type (struct objfile *objfile, int typeid) { struct type *type = NULL; switch (typeid) { default: /* FIXME: For now, if we are asked to produce a type not in this language, create the equivalent of a C integer type with the name "<?type?>". When all the dust settles from the type reconstruction work, this should probably become an error. */ type = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, 0, "<?type?>", objfile); warning (_("internal error: no Pascal fundamental type %d"), typeid); break; case FT_VOID: type = init_type (TYPE_CODE_VOID, TARGET_CHAR_BIT / TARGET_CHAR_BIT, 0, "void", objfile); break; case FT_CHAR: type = init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, 0, "char", objfile); break; case FT_SIGNED_CHAR: type = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT, 0, "shortint", objfile); break; case FT_UNSIGNED_CHAR: type = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, "byte", objfile); break; case FT_SHORT: type = init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT, 0, "integer", objfile); break; case FT_SIGNED_SHORT: type = init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT, 0, "integer", objfile); /* FIXME-fnf */ break; case FT_UNSIGNED_SHORT: type = init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, "word", objfile); break; case FT_INTEGER: type = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, 0, "longint", objfile); break; case FT_SIGNED_INTEGER: type = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, 0, "longint", objfile); /* FIXME -fnf */ break; case FT_UNSIGNED_INTEGER: type = init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, "cardinal", objfile); break; case FT_LONG: type = init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, 0, "long", objfile); break; case FT_SIGNED_LONG: type = init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, 0, "long", objfile); /* FIXME -fnf */ break; case FT_UNSIGNED_LONG: type = init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, "unsigned long", objfile); break; case FT_LONG_LONG: type = init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, 0, "long long", objfile); break; case FT_SIGNED_LONG_LONG: type = init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, 0, "signed long long", objfile); break; case FT_UNSIGNED_LONG_LONG: type = init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT, TYPE_FLAG_UNSIGNED, "unsigned long long", objfile); break; case FT_FLOAT: type = init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT, 0, "float", objfile); break; case FT_DBL_PREC_FLOAT: type = init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, 0, "double", objfile); break; case FT_EXT_PREC_FLOAT: type = init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT, 0, "extended", objfile); break; } return (type); } /* Table mapping opcodes into strings for printing operators and precedences of the operators. */ const struct op_print pascal_op_print_tab[] = { {",", BINOP_COMMA, PREC_COMMA, 0}, {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, {"=", BINOP_EQUAL, PREC_EQUAL, 0}, {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, {"<=", BINOP_LEQ, PREC_ORDER, 0}, {">=", BINOP_GEQ, PREC_ORDER, 0}, {">", BINOP_GTR, PREC_ORDER, 0}, {"<", BINOP_LESS, PREC_ORDER, 0}, {"shr", BINOP_RSH, PREC_SHIFT, 0}, {"shl", BINOP_LSH, PREC_SHIFT, 0}, {"+", BINOP_ADD, PREC_ADD, 0}, {"-", BINOP_SUB, PREC_ADD, 0}, {"*", BINOP_MUL, PREC_MUL, 0}, {"/", BINOP_DIV, PREC_MUL, 0}, {"div", BINOP_INTDIV, PREC_MUL, 0}, {"mod", BINOP_REM, PREC_MUL, 0}, {"@", BINOP_REPEAT, PREC_REPEAT, 0}, {"-", UNOP_NEG, PREC_PREFIX, 0}, {"not", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, {"^", UNOP_IND, PREC_SUFFIX, 1}, {"@", UNOP_ADDR, PREC_PREFIX, 0}, {"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0}, {NULL, 0, 0, 0} }; struct type **const (pascal_builtin_types[]) = { &builtin_type_int, &builtin_type_long, &builtin_type_short, &builtin_type_char, &builtin_type_float, &builtin_type_double, &builtin_type_void, &builtin_type_long_long, &builtin_type_signed_char, &builtin_type_unsigned_char, &builtin_type_unsigned_short, &builtin_type_unsigned_int, &builtin_type_unsigned_long, &builtin_type_unsigned_long_long, &builtin_type_long_double, &builtin_type_complex, &builtin_type_double_complex, 0 }; const struct language_defn pascal_language_defn = { "pascal", /* Language name */ language_pascal, pascal_builtin_types, range_check_on, type_check_on, case_sensitive_on, array_row_major, &exp_descriptor_standard, pascal_parse, pascal_error, null_post_parser, pascal_printchar, /* Print a character constant */ pascal_printstr, /* Function to print string constant */ pascal_emit_char, /* Print a single char */ pascal_create_fundamental_type, /* Create fundamental type in this language */ pascal_print_type, /* Print a type using appropriate syntax */ pascal_val_print, /* Print a value using appropriate syntax */ pascal_value_print, /* Print a top-level value */ NULL, /* Language specific skip_trampoline */ value_of_this, /* value_of_this */ basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ basic_lookup_transparent_type,/* lookup_transparent_type */ NULL, /* Language specific symbol demangler */ NULL, /* Language specific class_name_from_physname */ pascal_op_print_tab, /* expression operators for printing */ 1, /* c-style arrays */ 0, /* String lower bound */ &builtin_type_char, /* Type of string elements */ default_word_break_characters, NULL, /* FIXME: la_language_arch_info. */ default_print_array_index, LANG_MAGIC }; void _initialize_pascal_language (void) { add_language (&pascal_language_defn); }