diff options
Diffstat (limited to 'gcc/cpplib.c')
| -rw-r--r-- | gcc/cpplib.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gcc/cpplib.c b/gcc/cpplib.c index 1dfef72..f009681 100644 --- a/gcc/cpplib.c +++ b/gcc/cpplib.c @@ -109,6 +109,7 @@ static unsigned int read_flag (cpp_reader *, unsigned int); static int strtoul_for_line (const uchar *, unsigned int, unsigned long *); static void do_diagnostic (cpp_reader *, int, int); static cpp_hashnode *lex_macro_node (cpp_reader *); +static int undefine_macros (cpp_reader *, cpp_hashnode *, void *); static void do_include_common (cpp_reader *, enum include_type); static struct pragma_entry *lookup_pragma_entry (struct pragma_entry *, const cpp_hashnode *); @@ -540,6 +541,45 @@ do_undef (cpp_reader *pfile) check_eol (pfile); } +/* Undefine a single macro/assertion/whatever. */ + +static int +undefine_macros (cpp_reader *pfile, cpp_hashnode *h, + void *data_p ATTRIBUTE_UNUSED) +{ + switch (h->type) + { + case NT_VOID: + break; + + case NT_MACRO: + if (pfile->cb.undef) + (*pfile->cb.undef) (pfile, pfile->directive_line, h); + + if (CPP_OPTION (pfile, warn_unused_macros)) + _cpp_warn_if_unused_macro (pfile, h, NULL); + + /* and fall through... */ + case NT_ASSERTION: + _cpp_free_definition (h); + break; + + default: + abort (); + } + h->flags &= ~NODE_POISONED; + return 1; +} + +/* Undefine all macros and assertions. */ + +void +cpp_undef_all (cpp_reader *pfile) +{ + cpp_forall_identifiers (pfile, undefine_macros, NULL); +} + + /* Helper routine used by parse_include. Reinterpret the current line as an h-char-sequence (< ... >); we are looking at the first token after the <. Returns a malloced filename. */ |