1 //===-- lib/Common/idioms.cpp ---------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "flang/Common/idioms.h"
10 #include <cstdarg>
11 #include <cstdio>
12 #include <cstdlib>
13
14 namespace Fortran::common {
15
die(const char * msg,...)16 [[noreturn]] void die(const char *msg, ...) {
17 va_list ap;
18 va_start(ap, msg);
19 std::fputs("\nfatal internal error: ", stderr);
20 std::vfprintf(stderr, msg, ap);
21 va_end(ap);
22 fputc('\n', stderr);
23 std::abort();
24 }
25
26 // Convert the int index of an enumerator to a string.
27 // enumNames is a list of the names, separated by commas with optional spaces.
28 // This is intended for use from the expansion of ENUM_CLASS.
EnumIndexToString(int index,const char * enumNames)29 std::string EnumIndexToString(int index, const char *enumNames) {
30 const char *p{enumNames};
31 for (; index > 0; --index, ++p) {
32 for (; *p && *p != ','; ++p) {
33 }
34 }
35 for (; *p == ' '; ++p) {
36 }
37 CHECK(*p != '\0');
38 const char *q = p;
39 for (; *q && *q != ' ' && *q != ','; ++q) {
40 }
41 return std::string(p, q - p);
42 }
43 } // namespace Fortran::common
44