X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f518dbaf46eb28bd39695474de6118683d905e5f..f6df83b4e80b2a53c08b5dc654e247076a3b9b03:/src/system.h?ds=sidebyside diff --git a/src/system.h b/src/system.h index 7aa2c9fa..6355141a 100644 --- a/src/system.h +++ b/src/system.h @@ -16,55 +16,61 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef BISON_SYSTEM_H -#define BISON_SYSTEM_H +# define BISON_SYSTEM_H /* flex 2.5.31 gratutiously defines macros like INT8_MIN. But this runs afoul of pre-C99 compilers that have <inttypes.h> or <stdint.h>, which are included below if available. It also runs afoul of pre-C99 compilers that define these macros in <limits.h>. */ -#if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901 -# undef INT8_MIN -# undef INT16_MIN -# undef INT32_MIN -# undef INT8_MAX -# undef INT16_MAX -# undef UINT8_MAX -# undef INT32_MAX -# undef UINT16_MAX -# undef UINT32_MAX -#endif - -#include <limits.h> -#include <stddef.h> -#include <stdlib.h> -#include <string.h> - -#define STREQ(L, R) (strcmp(L, R) == 0) -#define STRNEQ(L, R) (!STREQ(L, R)) - -#if HAVE_SYS_TYPES_H -# include <sys/types.h> -#endif - -#include <unistd.h> -#include <inttypes.h> - -#ifndef UINTPTR_MAX +# if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901 +# undef INT8_MIN +# undef INT16_MIN +# undef INT32_MIN +# undef INT8_MAX +# undef INT16_MAX +# undef UINT8_MAX +# undef INT32_MAX +# undef UINT16_MAX +# undef UINT32_MAX +# endif + +# include <limits.h> +# include <stddef.h> +# include <stdlib.h> +# include <string.h> + +# define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array)) +# define STREQ(L, R) (strcmp(L, R) == 0) +# define STRNEQ(L, R) (!STREQ(L, R)) + +/* Just like strncmp, but the second argument must be a literal string + and you don't specify the length. */ +# define STRNCMP_LIT(S, Literal) \ + strncmp (S, "" Literal "", sizeof (Literal) - 1) + +/* Whether Literal is a prefix of S. */ +# define STRPREFIX_LIT(Literal, S) \ + (STRNCMP_LIT (S, Literal) == 0) + +# include <unistd.h> +# include <inttypes.h> + +# ifndef UINTPTR_MAX /* This isn't perfect, but it's good enough for Bison, which needs only to hash pointers. */ typedef size_t uintptr_t; -#endif +# endif -// Version mismatch. -#define EX_MISMATCH 63 +/* Version mismatch. */ +# define EX_MISMATCH 63 /*---------. | Gnulib. | `---------*/ -#include <unlocked-io.h> -#include <verify.h> -#include <xalloc.h> +# include <unlocked-io.h> +# include <verify.h> +# include <xalloc.h> /*-----------------. @@ -83,49 +89,48 @@ typedef size_t uintptr_t; and safer logic than it would for users. Due to the overhead of M4, suppressing Code is unlikely to offer any significant improvement in Bison's performance anyway. */ -#define PACIFY_CC(Code) Code +# define PACIFY_CC(Code) Code -#ifndef __attribute__ +# ifndef __attribute__ /* This feature is available in gcc versions 2.5 and later. */ -# if (! defined __GNUC__ || __GNUC__ < 2 \ - || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__) -# define __attribute__(Spec) /* empty */ +# if (! defined __GNUC__ || __GNUC__ < 2 \ + || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)) +# define __attribute__(Spec) /* empty */ +# endif # endif -#endif /* The __-protected variants of `format' and `printf' attributes are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */ -#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) -# define __format__ format -# define __printf__ printf -#endif +# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) +# define __format__ format +# define __printf__ printf +# endif -#ifndef ATTRIBUTE_NORETURN -# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) -#endif +# ifndef ATTRIBUTE_NORETURN +# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) +# endif -#ifndef ATTRIBUTE_UNUSED -# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) -#endif +# ifndef ATTRIBUTE_UNUSED +# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +# endif -#define FUNCTION_PRINT() fprintf (stderr, "%s: ", __func__) /*------. | NLS. | `------*/ -#include <locale.h> +# include <locale.h> -#include <gettext.h> -#define _(Msgid) gettext (Msgid) -#define N_(Msgid) (Msgid) +# include <gettext.h> +# define _(Msgid) gettext (Msgid) +# define N_(Msgid) (Msgid) /*-----------. | Booleans. | `-----------*/ -#include <stdbool.h> +# include <stdbool.h> @@ -151,66 +156,81 @@ typedef size_t uintptr_t; For now, we use assert but we call it aver throughout Bison in case we later wish to try another scheme. */ -#include <assert.h> -#define aver assert +# include <assert.h> +# define aver assert /*-----------. | Obstacks. | `-----------*/ -#define obstack_chunk_alloc xmalloc -#define obstack_chunk_free free -#include <obstack.h> +# define obstack_chunk_alloc xmalloc +# define obstack_chunk_free free +# include <obstack.h> + +/* String-grow: append Str to Obs. */ -#define obstack_sgrow(Obs, Str) \ +# define obstack_sgrow(Obs, Str) \ obstack_grow (Obs, Str, strlen (Str)) -#define obstack_fgrow1(Obs, Format, Arg1) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1); \ - obstack_grow (Obs, buf, strlen (buf)); \ -} while (0) +/* Output Str escaped for our postprocessing (i.e., escape M4 special + characters). + + For instance "[foo]" -> "@{foo@}", "$$" -> "$][$][". */ + +# define obstack_escape(Obs, Str) \ + do { \ + char const *p__; \ + for (p__ = Str; *p__; p__++) \ + switch (*p__) \ + { \ + case '$': obstack_sgrow (Obs, "$]["); break; \ + case '@': obstack_sgrow (Obs, "@@" ); break; \ + case '[': obstack_sgrow (Obs, "@{" ); break; \ + case ']': obstack_sgrow (Obs, "@}" ); break; \ + default: obstack_1grow (Obs, *p__ ); break; \ + } \ + } while (0) + -#define obstack_fgrow2(Obs, Format, Arg1, Arg2) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1, Arg2); \ - obstack_grow (Obs, buf, strlen (buf)); \ -} while (0) +/* Output Str both quoted for M4 (i.e., embed in [[...]]), and escaped + for our postprocessing (i.e., escape M4 special characters). If + Str is empty (or NULL), output "[]" instead of "[[]]" as it make M4 + programming easier (m4_ifval can be used). -#define obstack_fgrow3(Obs, Format, Arg1, Arg2, Arg3) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1, Arg2, Arg3); \ - obstack_grow (Obs, buf, strlen (buf)); \ -} while (0) + For instance "[foo]" -> "[[@{foo@}]]", "$$" -> "[[$][$][]]". */ -#define obstack_fgrow4(Obs, Format, Arg1, Arg2, Arg3, Arg4) \ -do { \ - char buf[4096]; \ - sprintf (buf, Format, Arg1, Arg2, Arg3, Arg4); \ - obstack_grow (Obs, buf, strlen (buf)); \ -} while (0) +# define obstack_quote(Obs, Str) \ + do { \ + char const* obstack_quote_p = Str; \ + if (obstack_quote_p && obstack_quote_p[0]) \ + { \ + obstack_sgrow (Obs, "[["); \ + obstack_escape (Obs, obstack_quote_p); \ + obstack_sgrow (Obs, "]]"); \ + } \ + else \ + obstack_sgrow (Obs, "[]"); \ + } while (0) +/* Append the ending 0, finish Obs, and return the string. */ + +# define obstack_finish0(Obs) \ + (obstack_1grow (Obs, '\0'), (char *) obstack_finish (Obs)) + /*-----------------------------------------. | Extensions to use for the output files. | `-----------------------------------------*/ -#ifndef OUTPUT_EXT -# define OUTPUT_EXT ".output" -#endif - -#ifndef TAB_EXT -# define TAB_EXT ".tab" -#endif +# ifndef OUTPUT_EXT +# define OUTPUT_EXT ".output" +# endif -#ifndef DEFAULT_TMPDIR -# define DEFAULT_TMPDIR "/tmp" -#endif +# ifndef TAB_EXT +# define TAB_EXT ".tab" +# endif @@ -218,15 +238,15 @@ do { \ | Free a linked list. | `---------------------*/ -#define LIST_FREE(Type, List) \ -do { \ - Type *_node, *_next; \ - for (_node = List; _node; _node = _next) \ - { \ - _next = _node->next; \ - free (_node); \ - } \ -} while (0) +# define LIST_FREE(Type, List) \ + do { \ + Type *_node, *_next; \ + for (_node = List; _node; _node = _next) \ + { \ + _next = _node->next; \ + free (_node); \ + } \ + } while (0) /*---------------------------------------------.