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https://sourceware.org/git/binutils-gdb.git
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bb2ec1b34e
This final patch adds the new "compile" command and subcommands, and all the machinery needed to make it work. A shared library supplied by gcc is used for all communications with gcc. Types and most aspects of symbols are provided directly by gdb to the compiler using this library. gdb provides some information about the user's code using plain text. Macros are emitted this way, and DWARF location expressions (and bounds for VLA) are compiled to C code. This hybrid approach was taken because, on the one hand, it is better to provide global declarations and such on demand; but on the other hand, for local variables, translating DWARF location expressions to C was much simpler than exporting a full compiler API to gdb -- the same result, only easier to implement, understand, and debug. In the ordinary mode, the user's expression is wrapped in a dummy function. After compilation, gdb inserts the resulting object code into the inferior, then calls this function. Access to local variables is provided by noting which registers are used by location expressions, and passing a structure of register values into the function. Writes to registers are supported by copying out these values after the function returns. This approach was taken so that we could eventually implement other more interesting features based on this same infrastructure; for example, we're planning to investigate inferior-side breakpoint conditions. gdb/ChangeLog 2014-12-12 Phil Muldoon <pmuldoon@redhat.com> Jan Kratochvil <jan.kratochvil@redhat.com> Tom Tromey <tromey@redhat.com> * NEWS: Update. * symtab.h (struct symbol_computed_ops) <generate_c_location>: New field. * p-lang.c (pascal_language_defn): Update. * opencl-lang.c (opencl_language_defn): Update. * objc-lang.c (objc_language_defn): Update. * m2-lang.c (m2_language_defn): Update. * language.h (struct language_defn) <la_get_compile_instance, la_compute_program>: New fields. * language.c (unknown_language_defn, auto_language_defn) (local_language_defn): Update. * jv-lang.c (java_language_defn): Update. * go-lang.c (go_language_defn): Update. * f-lang.c (f_language_defn): Update. * dwarf2loc.h (dwarf2_compile_property_to_c): Declare. * dwarf2loc.c (dwarf2_compile_property_to_c) (locexpr_generate_c_location, loclist_generate_c_location): New functions. (dwarf2_locexpr_funcs, dwarf2_loclist_funcs): Update. * defs.h (enum compile_i_scope_types): New. (enum command_control_type) <compile_control>: New constant. (struct command_line) <control_u>: New field. * d-lang.c (d_language_defn): Update. * compile/compile.c: New file. * compile/compile-c-support.c: New file. * compile/compile-c-symbols.c: New file. * compile/compile-c-types.c: New file. * compile/compile.h: New file. * compile/compile-internal.h: New file. * compile/compile-loc2c.c: New file. * compile/compile-object-load.c: New file. * compile/compile-object-load.h: New file. * compile/compile-object-run.c: New file. * compile/compile-object-run.h: New file. * cli/cli-script.c (multi_line_command_p, print_command_lines) (execute_control_command, process_next_line) (recurse_read_control_structure): Handle compile_control. * c-lang.h (c_get_compile_context, c_compute_program): Declare. * c-lang.c (c_language_defn, cplus_language_defn) (asm_language_defn, minimal_language_defn): Update. * ada-lang.c (ada_language_defn): Update. * Makefile.in (SUBDIR_GCC_COMPILE_OBS, SUBDIR_GCC_COMPILE_SRCS): New variables. (SFILES): Add SUBDIR_GCC_COMPILE_SRCS. (HFILES_NO_SRCDIR): Add compile.h. (COMMON_OBS): Add SUBDIR_GCC_COMPILE_OBS. (INIT_FILES): Add SUBDIR_GCC_COMPILE_SRCS. (compile.o, compile-c-types.o, compile-c-symbols.o) (compile-object-load.o, compile-object-run.o, compile-loc2c.o) (compile-c-support.o): New targets. gdb/doc/ChangeLog 2014-12-12 Phil Muldoon <pmuldoon@redhat.com> Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.texinfo (Altering): Update. (Compiling and Injecting Code): New node. gdb/testsuite/ChangeLog 2014-12-12 Phil Muldoon <pmuldoon@redhat.com> Jan Kratochvil <jan.kratochvil@redhat.com> Tom Tromey <tromey@redhat.com> * configure.ac: Add gdb.compile/. * configure: Regenerate. * gdb.compile/Makefile.in: New file. * gdb.compile/compile-ops.exp: New file. * gdb.compile/compile-ops.c: New file. * gdb.compile/compile-tls.c: New file. * gdb.compile/compile-tls.exp: New file. * gdb.compile/compile-constvar.S: New file. * gdb.compile/compile-constvar.c: New file. * gdb.compile/compile-mod.c: New file. * gdb.compile/compile-nodebug.c: New file. * gdb.compile/compile-setjmp-mod.c: New file. * gdb.compile/compile-setjmp.c: New file. * gdb.compile/compile-setjmp.exp: New file. * gdb.compile/compile-shlib.c: New file. * gdb.compile/compile.c: New file. * gdb.compile/compile.exp: New file. * lib/gdb.exp (skip_compile_feature_tests): New proc.
464 lines
15 KiB
C
464 lines
15 KiB
C
/* Pascal language support routines for GDB, the GNU debugger.
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Copyright (C) 2000-2014 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This file is derived from c-lang.c */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "varobj.h"
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#include "p-lang.h"
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#include "valprint.h"
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#include "value.h"
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#include <ctype.h>
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extern void _initialize_pascal_language (void);
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/* All GPC versions until now (2007-09-27) also define a symbol called
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'_p_initialize'. Check for the presence of this symbol first. */
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static const char GPC_P_INITIALIZE[] = "_p_initialize";
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/* The name of the symbol that GPC uses as the name of the main
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procedure (since version 20050212). */
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static const char GPC_MAIN_PROGRAM_NAME_1[] = "_p__M0_main_program";
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/* Older versions of GPC (versions older than 20050212) were using
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a different name for the main procedure. */
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static const char GPC_MAIN_PROGRAM_NAME_2[] = "pascal_main_program";
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/* Function returning the special symbol name used
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by GPC for the main procedure in the main program
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if it is found in minimal symbol list.
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This function tries to find minimal symbols generated by GPC
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so that it finds the even if the program was compiled
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without debugging information.
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According to information supplied by Waldeck Hebisch,
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this should work for all versions posterior to June 2000. */
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const char *
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pascal_main_name (void)
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{
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struct bound_minimal_symbol msym;
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msym = lookup_minimal_symbol (GPC_P_INITIALIZE, NULL, NULL);
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/* If '_p_initialize' was not found, the main program is likely not
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written in Pascal. */
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if (msym.minsym == NULL)
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return NULL;
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msym = lookup_minimal_symbol (GPC_MAIN_PROGRAM_NAME_1, NULL, NULL);
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if (msym.minsym != NULL)
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{
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return GPC_MAIN_PROGRAM_NAME_1;
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}
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msym = lookup_minimal_symbol (GPC_MAIN_PROGRAM_NAME_2, NULL, NULL);
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if (msym.minsym != NULL)
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{
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return GPC_MAIN_PROGRAM_NAME_2;
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}
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/* No known entry procedure found, the main program is probably
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not compiled with GPC. */
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return NULL;
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}
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/* Determines if type TYPE is a pascal string type.
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Returns a positive value if the type is a known pascal string type.
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This function is used by p-valprint.c code to allow better string display.
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If it is a pascal string type, then it also sets info needed
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to get the length and the data of the string
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length_pos, length_size and string_pos are given in bytes.
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char_size gives the element size in bytes.
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FIXME: if the position or the size of these fields
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are not multiple of TARGET_CHAR_BIT then the results are wrong
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but this does not happen for Free Pascal nor for GPC. */
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int
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is_pascal_string_type (struct type *type,int *length_pos,
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int *length_size, int *string_pos,
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struct type **char_type,
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const char **arrayname)
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{
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if (type != NULL && TYPE_CODE (type) == TYPE_CODE_STRUCT)
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{
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/* Old Borland type pascal strings from Free Pascal Compiler. */
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/* Two fields: length and st. */
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if (TYPE_NFIELDS (type) == 2
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&& TYPE_FIELD_NAME (type, 0)
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&& strcmp (TYPE_FIELD_NAME (type, 0), "length") == 0
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&& TYPE_FIELD_NAME (type, 1)
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&& strcmp (TYPE_FIELD_NAME (type, 1), "st") == 0)
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{
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if (length_pos)
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*length_pos = TYPE_FIELD_BITPOS (type, 0) / TARGET_CHAR_BIT;
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if (length_size)
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*length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
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if (string_pos)
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*string_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT;
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if (char_type)
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*char_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 1));
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if (arrayname)
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*arrayname = TYPE_FIELD_NAME (type, 1);
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return 2;
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};
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/* GNU pascal strings. */
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/* Three fields: Capacity, length and schema$ or _p_schema. */
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if (TYPE_NFIELDS (type) == 3
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&& TYPE_FIELD_NAME (type, 0)
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&& strcmp (TYPE_FIELD_NAME (type, 0), "Capacity") == 0
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&& TYPE_FIELD_NAME (type, 1)
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&& strcmp (TYPE_FIELD_NAME (type, 1), "length") == 0)
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{
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if (length_pos)
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*length_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT;
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if (length_size)
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*length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 1));
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if (string_pos)
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*string_pos = TYPE_FIELD_BITPOS (type, 2) / TARGET_CHAR_BIT;
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/* FIXME: how can I detect wide chars in GPC ?? */
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if (char_type)
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{
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*char_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 2));
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if (TYPE_CODE (*char_type) == TYPE_CODE_ARRAY)
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*char_type = TYPE_TARGET_TYPE (*char_type);
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}
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if (arrayname)
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*arrayname = TYPE_FIELD_NAME (type, 2);
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return 3;
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};
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}
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return 0;
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}
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static void pascal_one_char (int, struct ui_file *, int *);
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/* Print the character C on STREAM as part of the contents of a literal
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string.
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In_quotes is reset to 0 if a char is written with #4 notation. */
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static void
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pascal_one_char (int c, struct ui_file *stream, int *in_quotes)
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{
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if (c == '\'' || ((unsigned int) c <= 0xff && (PRINT_LITERAL_FORM (c))))
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{
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if (!(*in_quotes))
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fputs_filtered ("'", stream);
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*in_quotes = 1;
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if (c == '\'')
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{
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fputs_filtered ("''", stream);
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}
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else
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fprintf_filtered (stream, "%c", c);
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}
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else
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{
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if (*in_quotes)
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fputs_filtered ("'", stream);
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*in_quotes = 0;
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fprintf_filtered (stream, "#%d", (unsigned int) c);
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}
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}
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static void pascal_emit_char (int c, struct type *type,
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struct ui_file *stream, int quoter);
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. Note that that format for printing
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characters and strings is language specific. */
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static void
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pascal_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
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{
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int in_quotes = 0;
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pascal_one_char (c, stream, &in_quotes);
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if (in_quotes)
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fputs_filtered ("'", stream);
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}
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void
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pascal_printchar (int c, struct type *type, struct ui_file *stream)
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{
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int in_quotes = 0;
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pascal_one_char (c, stream, &in_quotes);
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if (in_quotes)
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fputs_filtered ("'", stream);
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}
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/* Print the character string STRING, printing at most LENGTH characters.
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Printing stops early if the number hits print_max; repeat counts
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are printed as appropriate. Print ellipses at the end if we
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had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */
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void
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pascal_printstr (struct ui_file *stream, struct type *type,
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const gdb_byte *string, unsigned int length,
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const char *encoding, int force_ellipses,
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const struct value_print_options *options)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
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unsigned int i;
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unsigned int things_printed = 0;
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int in_quotes = 0;
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int need_comma = 0;
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int width;
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/* Preserve TYPE's original type, just set its LENGTH. */
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check_typedef (type);
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width = TYPE_LENGTH (type);
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/* If the string was not truncated due to `set print elements', and
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the last byte of it is a null, we don't print that, in traditional C
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style. */
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if ((!force_ellipses) && length > 0
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&& extract_unsigned_integer (string + (length - 1) * width, width,
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byte_order) == 0)
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length--;
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if (length == 0)
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{
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fputs_filtered ("''", stream);
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return;
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}
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for (i = 0; i < length && things_printed < options->print_max; ++i)
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{
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/* Position of the character we are examining
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to see whether it is repeated. */
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unsigned int rep1;
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/* Number of repetitions we have detected so far. */
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unsigned int reps;
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unsigned long int current_char;
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QUIT;
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if (need_comma)
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{
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fputs_filtered (", ", stream);
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need_comma = 0;
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}
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current_char = extract_unsigned_integer (string + i * width, width,
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byte_order);
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rep1 = i + 1;
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reps = 1;
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while (rep1 < length
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&& extract_unsigned_integer (string + rep1 * width, width,
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byte_order) == current_char)
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{
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++rep1;
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++reps;
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}
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if (reps > options->repeat_count_threshold)
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{
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if (in_quotes)
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{
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fputs_filtered ("', ", stream);
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in_quotes = 0;
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}
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pascal_printchar (current_char, type, stream);
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fprintf_filtered (stream, " <repeats %u times>", reps);
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i = rep1 - 1;
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things_printed += options->repeat_count_threshold;
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need_comma = 1;
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}
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else
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{
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if ((!in_quotes) && (PRINT_LITERAL_FORM (current_char)))
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{
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fputs_filtered ("'", stream);
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in_quotes = 1;
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}
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pascal_one_char (current_char, stream, &in_quotes);
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++things_printed;
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}
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}
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/* Terminate the quotes if necessary. */
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if (in_quotes)
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fputs_filtered ("'", stream);
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if (force_ellipses || i < length)
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fputs_filtered ("...", stream);
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}
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/* Table mapping opcodes into strings for printing operators
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and precedences of the operators. */
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const struct op_print pascal_op_print_tab[] =
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{
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{",", BINOP_COMMA, PREC_COMMA, 0},
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{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
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{"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
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{"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
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{"=", BINOP_EQUAL, PREC_EQUAL, 0},
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{"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},
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{"<=", BINOP_LEQ, PREC_ORDER, 0},
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{">=", BINOP_GEQ, PREC_ORDER, 0},
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{">", BINOP_GTR, PREC_ORDER, 0},
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{"<", BINOP_LESS, PREC_ORDER, 0},
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{"shr", BINOP_RSH, PREC_SHIFT, 0},
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{"shl", BINOP_LSH, PREC_SHIFT, 0},
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"div", BINOP_INTDIV, PREC_MUL, 0},
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{"mod", BINOP_REM, PREC_MUL, 0},
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{"@", BINOP_REPEAT, PREC_REPEAT, 0},
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{"not", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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{"^", UNOP_IND, PREC_SUFFIX, 1},
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{"@", UNOP_ADDR, PREC_PREFIX, 0},
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{"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0},
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{NULL, 0, 0, 0}
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};
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enum pascal_primitive_types {
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pascal_primitive_type_int,
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pascal_primitive_type_long,
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pascal_primitive_type_short,
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pascal_primitive_type_char,
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pascal_primitive_type_float,
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pascal_primitive_type_double,
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pascal_primitive_type_void,
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pascal_primitive_type_long_long,
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pascal_primitive_type_signed_char,
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pascal_primitive_type_unsigned_char,
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pascal_primitive_type_unsigned_short,
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pascal_primitive_type_unsigned_int,
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pascal_primitive_type_unsigned_long,
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pascal_primitive_type_unsigned_long_long,
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pascal_primitive_type_long_double,
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pascal_primitive_type_complex,
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pascal_primitive_type_double_complex,
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nr_pascal_primitive_types
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};
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static void
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pascal_language_arch_info (struct gdbarch *gdbarch,
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struct language_arch_info *lai)
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{
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const struct builtin_type *builtin = builtin_type (gdbarch);
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lai->string_char_type = builtin->builtin_char;
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lai->primitive_type_vector
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= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_pascal_primitive_types + 1,
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struct type *);
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lai->primitive_type_vector [pascal_primitive_type_int]
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= builtin->builtin_int;
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lai->primitive_type_vector [pascal_primitive_type_long]
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= builtin->builtin_long;
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lai->primitive_type_vector [pascal_primitive_type_short]
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= builtin->builtin_short;
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lai->primitive_type_vector [pascal_primitive_type_char]
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= builtin->builtin_char;
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lai->primitive_type_vector [pascal_primitive_type_float]
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= builtin->builtin_float;
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lai->primitive_type_vector [pascal_primitive_type_double]
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= builtin->builtin_double;
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lai->primitive_type_vector [pascal_primitive_type_void]
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= builtin->builtin_void;
|
||
lai->primitive_type_vector [pascal_primitive_type_long_long]
|
||
= builtin->builtin_long_long;
|
||
lai->primitive_type_vector [pascal_primitive_type_signed_char]
|
||
= builtin->builtin_signed_char;
|
||
lai->primitive_type_vector [pascal_primitive_type_unsigned_char]
|
||
= builtin->builtin_unsigned_char;
|
||
lai->primitive_type_vector [pascal_primitive_type_unsigned_short]
|
||
= builtin->builtin_unsigned_short;
|
||
lai->primitive_type_vector [pascal_primitive_type_unsigned_int]
|
||
= builtin->builtin_unsigned_int;
|
||
lai->primitive_type_vector [pascal_primitive_type_unsigned_long]
|
||
= builtin->builtin_unsigned_long;
|
||
lai->primitive_type_vector [pascal_primitive_type_unsigned_long_long]
|
||
= builtin->builtin_unsigned_long_long;
|
||
lai->primitive_type_vector [pascal_primitive_type_long_double]
|
||
= builtin->builtin_long_double;
|
||
lai->primitive_type_vector [pascal_primitive_type_complex]
|
||
= builtin->builtin_complex;
|
||
lai->primitive_type_vector [pascal_primitive_type_double_complex]
|
||
= builtin->builtin_double_complex;
|
||
|
||
lai->bool_type_symbol = "boolean";
|
||
lai->bool_type_default = builtin->builtin_bool;
|
||
}
|
||
|
||
const struct language_defn pascal_language_defn =
|
||
{
|
||
"pascal", /* Language name */
|
||
"Pascal",
|
||
language_pascal,
|
||
range_check_on,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
macro_expansion_no,
|
||
&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_print_type, /* Print a type using appropriate syntax */
|
||
pascal_print_typedef, /* Print a typedef using appropriate syntax */
|
||
pascal_val_print, /* Print a value using appropriate syntax */
|
||
pascal_value_print, /* Print a top-level value */
|
||
default_read_var_value, /* la_read_var_value */
|
||
NULL, /* Language specific skip_trampoline */
|
||
"this", /* name_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 */
|
||
default_word_break_characters,
|
||
default_make_symbol_completion_list,
|
||
pascal_language_arch_info,
|
||
default_print_array_index,
|
||
default_pass_by_reference,
|
||
default_get_string,
|
||
NULL, /* la_get_symbol_name_cmp */
|
||
iterate_over_symbols,
|
||
&default_varobj_ops,
|
||
NULL,
|
||
NULL,
|
||
LANG_MAGIC
|
||
};
|
||
|
||
void
|
||
_initialize_pascal_language (void)
|
||
{
|
||
add_language (&pascal_language_defn);
|
||
}
|