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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/c-lang.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
downloadbinutils-071ea11e85eb9d529cc5eb3d35f6247466a21b99.zip
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Initial creation of sourceware repository
Diffstat (limited to 'gdb/c-lang.c')
-rw-r--r--gdb/c-lang.c527
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diff --git a/gdb/c-lang.c b/gdb/c-lang.c
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--- a/gdb/c-lang.c
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@@ -1,527 +0,0 @@
-/* C language support routines for GDB, the GNU debugger.
- Copyright 1992, 1993, 1994 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "symtab.h"
-#include "gdbtypes.h"
-#include "expression.h"
-#include "parser-defs.h"
-#include "language.h"
-#include "c-lang.h"
-
-static void c_emit_char PARAMS ((int c, GDB_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
-c_emit_char (c, stream, quoter)
- register int c;
- GDB_FILE *stream;
- int quoter;
-{
- c &= 0xFF; /* Avoid sign bit follies */
-
- if (PRINT_LITERAL_FORM (c))
- {
- if (c == '\\' || c == quoter)
- {
- fputs_filtered ("\\", stream);
- }
- fprintf_filtered (stream, "%c", c);
- }
- else
- {
- switch (c)
- {
- case '\n':
- fputs_filtered ("\\n", stream);
- break;
- case '\b':
- fputs_filtered ("\\b", stream);
- break;
- case '\t':
- fputs_filtered ("\\t", stream);
- break;
- case '\f':
- fputs_filtered ("\\f", stream);
- break;
- case '\r':
- fputs_filtered ("\\r", stream);
- break;
- case '\033':
- fputs_filtered ("\\e", stream);
- break;
- case '\007':
- fputs_filtered ("\\a", stream);
- break;
- default:
- fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
- break;
- }
- }
-}
-
-void
-c_printchar (c, stream)
- int c;
- GDB_FILE *stream;
-{
- fputc_filtered ('\'', stream);
- LA_EMIT_CHAR (c, stream, '\'');
- fputc_filtered ('\'', stream);
-}
-
-/* Print the character string STRING, printing at most LENGTH characters.
- LENGTH is -1 if the string is nul terminated. Each character is WIDTH bytes
- long. 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
-c_printstr (stream, string, length, width, force_ellipses)
- GDB_FILE *stream;
- char *string;
- unsigned int length;
- int width;
- int force_ellipses;
-{
- register unsigned int i;
- unsigned int things_printed = 0;
- int in_quotes = 0;
- int need_comma = 0;
- extern int inspect_it;
- extern int repeat_count_threshold;
- extern int print_max;
-
- /* 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
- && extract_unsigned_integer (string + (length - 1) * width, width) == '\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;
- unsigned long current_char;
-
- QUIT;
-
- if (need_comma)
- {
- fputs_filtered (", ", stream);
- need_comma = 0;
- }
-
- current_char = extract_unsigned_integer (string + i * width, width);
-
- rep1 = i + 1;
- reps = 1;
- while (rep1 < length
- && extract_unsigned_integer (string + rep1 * width, width)
- == current_char)
- {
- ++rep1;
- ++reps;
- }
-
- if (reps > repeat_count_threshold)
- {
- if (in_quotes)
- {
- if (inspect_it)
- fputs_filtered ("\\\", ", stream);
- else
- fputs_filtered ("\", ", stream);
- in_quotes = 0;
- }
- LA_PRINT_CHAR (current_char, stream);
- fprintf_filtered (stream, " <repeats %u times>", reps);
- i = rep1 - 1;
- things_printed += repeat_count_threshold;
- need_comma = 1;
- }
- else
- {
- if (!in_quotes)
- {
- if (inspect_it)
- fputs_filtered ("\\\"", stream);
- else
- fputs_filtered ("\"", stream);
- in_quotes = 1;
- }
- LA_EMIT_CHAR (current_char, stream, '"');
- ++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 C 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 */
-
-struct type *
-c_create_fundamental_type (objfile, typeid)
- struct objfile *objfile;
- int typeid;
-{
- register 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 C/C++ 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_BOOLEAN:
- type = init_type (TYPE_CODE_BOOL,
- TARGET_CHAR_BIT / TARGET_CHAR_BIT,
- 0, "bool", objfile);
-
- break;
- case FT_CHAR:
- type = init_type (TYPE_CODE_INT,
- TARGET_CHAR_BIT / TARGET_CHAR_BIT,
- 0, "char", objfile);
- TYPE_FLAGS (type) |= TYPE_FLAG_NOSIGN;
- break;
- case FT_SIGNED_CHAR:
- type = init_type (TYPE_CODE_INT,
- TARGET_CHAR_BIT / TARGET_CHAR_BIT,
- 0, "signed char", objfile);
- break;
- case FT_UNSIGNED_CHAR:
- type = init_type (TYPE_CODE_INT,
- TARGET_CHAR_BIT / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
- break;
- case FT_SHORT:
- type = init_type (TYPE_CODE_INT,
- TARGET_SHORT_BIT / TARGET_CHAR_BIT,
- 0, "short", objfile);
- break;
- case FT_SIGNED_SHORT:
- type = init_type (TYPE_CODE_INT,
- TARGET_SHORT_BIT / TARGET_CHAR_BIT,
- 0, "short", objfile); /* FIXME-fnf */
- break;
- case FT_UNSIGNED_SHORT:
- type = init_type (TYPE_CODE_INT,
- TARGET_SHORT_BIT / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
- break;
- case FT_INTEGER:
- type = init_type (TYPE_CODE_INT,
- TARGET_INT_BIT / TARGET_CHAR_BIT,
- 0, "int", objfile);
- break;
- case FT_SIGNED_INTEGER:
- type = init_type (TYPE_CODE_INT,
- TARGET_INT_BIT / TARGET_CHAR_BIT,
- 0, "int", objfile); /* FIXME -fnf */
- break;
- case FT_UNSIGNED_INTEGER:
- type = init_type (TYPE_CODE_INT,
- TARGET_INT_BIT / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED, "unsigned int", 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, "long double", objfile);
- break;
- case FT_TEMPLATE_ARG:
- type = init_type (TYPE_CODE_TEMPLATE_ARG,
- 0,
- 0, "<template arg>", objfile);
-
- break;
- }
- return (type);
-}
-
-
-/* Table mapping opcodes into strings for printing operators
- and precedences of the operators. */
-
-const struct op_print c_op_print_tab[] =
- {
- {",", BINOP_COMMA, PREC_COMMA, 0},
- {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
- {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
- {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
- {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
- {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
- {"&", 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},
- {">>", BINOP_RSH, PREC_SHIFT, 0},
- {"<<", 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},
- {"%", BINOP_REM, PREC_MUL, 0},
- {"@", BINOP_REPEAT, PREC_REPEAT, 0},
- {"-", UNOP_NEG, PREC_PREFIX, 0},
- {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
- {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
- {"*", UNOP_IND, PREC_PREFIX, 0},
- {"&", UNOP_ADDR, PREC_PREFIX, 0},
- {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
- {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
- {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
- /* C++ */
- {"::", BINOP_SCOPE, PREC_PREFIX, 0},
- {NULL, 0, 0, 0}
-};
-
-struct type ** CONST_PTR (c_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 c_language_defn = {
- "c", /* Language name */
- language_c,
- c_builtin_types,
- range_check_off,
- type_check_off,
- c_parse,
- c_error,
- evaluate_subexp_standard,
- c_printchar, /* Print a character constant */
- c_printstr, /* Function to print string constant */
- c_emit_char, /* Print a single char */
- c_create_fundamental_type, /* Create fundamental type in this language */
- c_print_type, /* Print a type using appropriate syntax */
- c_val_print, /* Print a value using appropriate syntax */
- c_value_print, /* Print a top-level value */
- {"", "", "", ""}, /* Binary format info */
- {"0%lo", "0", "o", ""}, /* Octal format info */
- {"%ld", "", "d", ""}, /* Decimal format info */
- {"0x%lx", "0x", "x", ""}, /* Hex format info */
- c_op_print_tab, /* expression operators for printing */
- 1, /* c-style arrays */
- 0, /* String lower bound */
- &builtin_type_char, /* Type of string elements */
- LANG_MAGIC
-};
-
-struct type ** const (cplus_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,
- &builtin_type_bool,
- 0
-};
-
-const struct language_defn cplus_language_defn = {
- "c++", /* Language name */
- language_cplus,
- cplus_builtin_types,
- range_check_off,
- type_check_off,
- c_parse,
- c_error,
- evaluate_subexp_standard,
- c_printchar, /* Print a character constant */
- c_printstr, /* Function to print string constant */
- c_emit_char, /* Print a single char */
- c_create_fundamental_type, /* Create fundamental type in this language */
- c_print_type, /* Print a type using appropriate syntax */
- c_val_print, /* Print a value using appropriate syntax */
- c_value_print, /* Print a top-level value */
- {"", "", "", ""}, /* Binary format info */
- {"0%lo", "0", "o", ""}, /* Octal format info */
- {"%ld", "", "d", ""}, /* Decimal format info */
- {"0x%lx", "0x", "x", ""}, /* Hex format info */
- c_op_print_tab, /* expression operators for printing */
- 1, /* c-style arrays */
- 0, /* String lower bound */
- &builtin_type_char, /* Type of string elements */
- LANG_MAGIC
-};
-
-const struct language_defn asm_language_defn = {
- "asm", /* Language name */
- language_asm,
- c_builtin_types,
- range_check_off,
- type_check_off,
- c_parse,
- c_error,
- evaluate_subexp_standard,
- c_printchar, /* Print a character constant */
- c_printstr, /* Function to print string constant */
- c_emit_char, /* Print a single char */
- c_create_fundamental_type, /* Create fundamental type in this language */
- c_print_type, /* Print a type using appropriate syntax */
- c_val_print, /* Print a value using appropriate syntax */
- c_value_print, /* Print a top-level value */
- {"", "", "", ""}, /* Binary format info */
- {"0%lo", "0", "o", ""}, /* Octal format info */
- {"%ld", "", "d", ""}, /* Decimal format info */
- {"0x%lx", "0x", "x", ""}, /* Hex format info */
- c_op_print_tab, /* expression operators for printing */
- 1, /* c-style arrays */
- 0, /* String lower bound */
- &builtin_type_char, /* Type of string elements */
- LANG_MAGIC
-};
-
-void
-_initialize_c_language ()
-{
- add_language (&c_language_defn);
- add_language (&cplus_language_defn);
- add_language (&asm_language_defn);
-}