X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/5bab03fcf8db5771b6a9fc22d917e61bf143dde2..71b52b1342c65a5497f6b3780481ff2deb932a56:/src/uniqstr.h?ds=inline diff --git a/src/uniqstr.h b/src/uniqstr.h index 6dc7f3f8..913da39f 100644 --- a/src/uniqstr.h +++ b/src/uniqstr.h @@ -1,22 +1,21 @@ /* Keeping a unique copy of strings. - Copyright (C) 2002 Free Software Foundation, Inc. + + Copyright (C) 2002-2003, 2008-2012 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison is free software; you can redistribute it and/or modify + 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, or (at your option) - any later version. + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - Bison is distributed in the hope that it will be useful, + 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 Bison; see the file COPYING. If not, write to - the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + along with this program. If not, see . */ #ifndef UNIQSTR_H_ # define UNIQSTR_H_ @@ -27,11 +26,21 @@ typedef char const *uniqstr; -/* Return the uniqstr for S. */ -uniqstr uniqstr_new (char const *s); +/* Return the uniqstr for STR. */ +uniqstr uniqstr_new (char const *str); + +/* Return a uniqstr built by vsprintf. In order to simply concatenate + strings, use UNIQSTR_CONCAT, which is a convenient wrapper around + this function. */ +uniqstr uniqstr_vsprintf (char const *format, ...) + __attribute__ ((__format__ (__printf__, 1, 2))); -/* Two uniqstr have the same value iff they are the same. */ -#define UNIQSTR_EQ(S1, S2) ((S1) == (S2)) +/* Two uniqstr values have the same value iff they are the same. */ +#define UNIQSTR_EQ(USTR1, USTR2) ((USTR1) == (USTR2)) + +/* Compare two uniqstr a la strcmp: negative for <, nul for =, and + positive for >. Undefined order, relies on addresses. */ +#define UNIQSTR_CMP(USTR1, USTR2) ((USTR1) - (USTR2)) /*--------------------------------------. | Initializing, destroying, debugging. | @@ -40,8 +49,8 @@ uniqstr uniqstr_new (char const *s); /* Create the string table. */ void uniqstrs_new (void); -/* Die if S is not a uniqstr. */ -void uniqstr_assert (const char *s); +/* Die if STR is not a uniqstr. */ +void uniqstr_assert (char const *str); /* Free all the memory allocated for symbols. */ void uniqstrs_free (void); @@ -49,4 +58,41 @@ void uniqstrs_free (void); /* Report them all. */ void uniqstrs_print (void); +/*----------------. +| Concatenation. | +`----------------*/ + +/* Concatenate at most 20 strings and return a uniqstr. The goal of + this macro is to make the caller's code a little more succinct + without a trivial uniqstr_vsprintf format string to maintain + (for example, "%s%s%s") while still benefitting from gcc's type + checking. Unfortunately, because of the missing format string in the + macro invocation, the argument number reported by gcc for a bad + argument type is 1 too large. */ +#define UNIQSTR_CONCAT(...) \ + uniqstr_vsprintf (UNIQSTR_GEN_FORMAT (__VA_ARGS__, \ + "%s", "%s", "%s", "%s", "%s", \ + "%s", "%s", "%s", "%s", "%s", \ + "%s", "%s", "%s", "%s", "%s", \ + "%s", "%s", "%s", "%s", "%s"), \ + __VA_ARGS__) + +#define UNIQSTR_GEN_FORMAT(F1, F2, F3, F4, F5, \ + F6, F7, F8, F9, F10, \ + F11, F12, F13, F14, F15, \ + F16, F17, F18, F19, F20, \ + ...) \ + UNIQSTR_GEN_FORMAT_ (__VA_ARGS__, \ + "", "", "", "", "", \ + "", "", "", "", "", \ + "", "", "", "", "", \ + "", "", "", "", "") + +#define UNIQSTR_GEN_FORMAT_(F1, F2, F3, F4, F5, \ + F6, F7, F8, F9, F10, \ + F11, F12, F13, F14, F15, \ + F16, F17, F18, F19, F20, ...) \ + F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 \ + F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 + #endif /* ! defined UNIQSTR_H_ */