/* String intrinsics helper functions. Copyright (C) 2008-2016 Free Software Foundation, Inc. This file is part of the GNU Fortran runtime library (libgfortran). Libgfortran 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 3 of the License, or (at your option) any later version. Libgfortran 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. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see . */ /* Unlike what the name of this file suggests, we don't actually implement the Fortran intrinsics here. At least, not with the names they have in the standard. The functions here provide all the support we need for the standard string intrinsics, and the compiler translates the actual intrinsics calls to calls to functions in this file. */ #include "libgfortran.h" #include #include /* Helper function to set parts of wide strings to a constant (usually spaces). */ static gfc_char4_t * memset_char4 (gfc_char4_t *b, gfc_char4_t c, size_t len) { size_t i; for (i = 0; i < len; i++) b[i] = c; return b; } /* Compare wide character types, which are handled internally as unsigned 4-byte integers. */ int memcmp_char4 (const void *a, const void *b, size_t len) { const GFC_UINTEGER_4 *pa = a; const GFC_UINTEGER_4 *pb = b; while (len-- > 0) { if (*pa != *pb) return *pa < *pb ? -1 : 1; pa ++; pb ++; } return 0; } /* All other functions are defined using a few generic macros in string_intrinsics_inc.c, so we avoid code duplication between the various character type kinds. */ #undef CHARTYPE #define CHARTYPE char #undef UCHARTYPE #define UCHARTYPE unsigned char #undef SUFFIX #define SUFFIX(x) x #undef MEMSET #define MEMSET memset #undef MEMCMP #define MEMCMP memcmp #include "string_intrinsics_inc.c" #undef CHARTYPE #define CHARTYPE gfc_char4_t #undef UCHARTYPE #define UCHARTYPE gfc_char4_t #undef SUFFIX #define SUFFIX(x) x ## _char4 #undef MEMSET #define MEMSET memset_char4 #undef MEMCMP #define MEMCMP memcmp_char4 #include "string_intrinsics_inc.c"