diff options
Diffstat (limited to 'gcc/cpplib.h')
| -rw-r--r-- | gcc/cpplib.h | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/gcc/cpplib.h b/gcc/cpplib.h index 68059cc..0ac5c27 100644 --- a/gcc/cpplib.h +++ b/gcc/cpplib.h @@ -35,6 +35,7 @@ typedef struct cpp_printer cpp_printer; typedef struct cpp_token cpp_token; typedef struct cpp_toklist cpp_toklist; typedef struct cpp_name cpp_name; +typedef struct cpp_hashnode cpp_hashnode; /* The first two groups, apart from '=', can appear in preprocessor expressions. This allows a lookup table to be implemented in @@ -238,7 +239,7 @@ struct cpp_buffer /* If the buffer is the expansion of a macro, this points to the macro's hash table entry. */ - struct hashnode *macro; + struct cpp_hashnode *macro; /* Value of if_stack at start of this file. Used to prohibit unmatched #endif (etc) in an include file. */ @@ -590,6 +591,61 @@ struct cpp_printer /* Name under which this program was invoked. */ extern const char *progname; +/* The structure of a node in the hash table. The hash table + has entries for all tokens defined by #define commands (type T_MACRO), + plus some special tokens like __LINE__ (these each have their own + type, and the appropriate code is run when that type of node is seen. + It does not contain control words like "#define", which are recognized + by a separate piece of code. */ + +/* different flavors of hash nodes */ +enum node_type +{ + T_VOID = 0, /* no definition yet */ + T_SPECLINE, /* `__LINE__' */ + T_DATE, /* `__DATE__' */ + T_FILE, /* `__FILE__' */ + T_BASE_FILE, /* `__BASE_FILE__' */ + T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */ + T_TIME, /* `__TIME__' */ + T_STDC, /* `__STDC__' */ + T_CONST, /* Constant string, used by `__SIZE_TYPE__' etc */ + T_XCONST, /* Ditto, but the string is malloced memory */ + T_POISON, /* poisoned identifier */ + T_MACRO, /* object-like macro */ + T_FMACRO, /* function-like macro */ + T_IDENTITY, /* macro defined to itself */ + T_EMPTY, /* macro defined to nothing */ + T_ASSERTION /* predicate for #assert */ +}; + +/* There is a slot in the hashnode for use by front ends when integrated + with cpplib. It holds a tree (see tree.h) but we mustn't drag that + header into every user of cpplib.h. cpplib does not do anything with + this slot except clear it when a new node is created. */ +union tree_node; + +struct cpp_hashnode +{ + unsigned int hash; /* cached hash value */ + unsigned short length; /* length of name */ + ENUM_BITFIELD(node_type) type : 8; /* node type */ + char disabled; /* macro turned off for rescan? */ + + union { + const unsigned char *cpval; /* some predefined macros */ + const struct object_defn *odefn; /* #define foo bar */ + const struct funct_defn *fdefn; /* #define foo(x) bar(x) */ + struct predicate *pred; /* #assert */ + } value; + + union tree_node *fe_value; /* front end value */ + + const unsigned char name[1]; /* name[length] */ +}; + + + extern void _cpp_lex_file PARAMS((cpp_reader *)); extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **)); extern enum cpp_ttype cpp_get_token PARAMS ((cpp_reader *)); @@ -653,6 +709,8 @@ extern int cpp_idcmp PARAMS ((const unsigned char *, /* In cpphash.c */ extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int)); +extern cpp_hashnode *cpp_lookup PARAMS ((cpp_reader *, + const unsigned char *, int)); /* In cppfiles.c */ extern int cpp_included PARAMS ((cpp_reader *, const char *)); |