X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f16b08196c780556cbf50691e2944960aebc46f6..0bfe22b6d523a359fb2ac8892c6acf85342b54f6:/src/uniqstr.h?ds=inline diff --git a/src/uniqstr.h b/src/uniqstr.h index 3eb152d3..006c10f4 100644 --- a/src/uniqstr.h +++ b/src/uniqstr.h @@ -1,6 +1,6 @@ /* Keeping a unique copy of strings. - Copyright (C) 2002, 2003 Free Software Foundation, Inc. + Copyright (C) 2002-2003, 2008-2013 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -29,19 +29,66 @@ typedef char const *uniqstr; /* Return the uniqstr for STR. */ uniqstr uniqstr_new (char const *str); -/* Two uniqstr values have the same value iff they are the same. */ -#define UNIQSTR_EQ(USTR1, USTR2) ((USTR1) == (USTR2)) +/* 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))); -/*--------------------------------------. -| Initializing, destroying, debugging. | -`--------------------------------------*/ +/* Two uniqstr values have the same value iff they are the same. */ +# define UNIQSTR_EQ(Ustr1, Ustr2) (!!((Ustr1) == (Ustr2))) -/* Create the string table. */ -void uniqstrs_new (void); +/* Compare two uniqstr a la strcmp: negative for <, nul for =, and + positive for >. Undefined order, relies on addresses. */ +int uniqstr_cmp (uniqstr u1, uniqstr u2); /* Die if STR is not a uniqstr. */ void uniqstr_assert (char const *str); +/*----------------. +| 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 + +/*--------------------. +| Table of uniqstrs. | +`--------------------*/ + +/* Create the string table. */ +void uniqstrs_new (void); + /* Free all the memory allocated for symbols. */ void uniqstrs_free (void);