111 lines
3.9 KiB
C++
111 lines
3.9 KiB
C++
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/*
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* Copyright (C) 2023 The C++ Plus Project.
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* This file is part of the cppp-reiconv Library.
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*
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* The cppp-reiconv Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* The cppp-reiconv Library is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the cppp-reiconv Library; see the file COPYING.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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/* Creates the aliases.gperf table. */
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#include <iostream>
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/* When we create shell scripts, we need to make sure that on Cygwin they have
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Unix end-of-line characters, regardless of Cygwin choice of text mode vs.
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binary mode. On z/OS, however, binary mode turns off charset tagging for
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output files, which is not what we want. */
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#if defined __MVS__
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#define BINARY_MODE ""
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#else
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#define BINARY_MODE "b"
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#endif
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static void emit_alias(FILE* out, const char* alias, const char* c_name)
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{
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/* Output alias in upper case. */
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const char *s = alias;
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for (; *s; s++)
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{
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unsigned char c = *(unsigned char*)s;
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if (c >= 0x80)
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exit(1);
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if (c >= 'a' && c <= 'z')
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c -= 'a' - 'A';
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putc(c, out);
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}
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fprintf(out, ", ei_%s\n", c_name);
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}
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static void emit_encoding(FILE* out, const char* const* names, size_t n, const char* c_name)
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{
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for (; n > 0; names++, n--)
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{
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emit_alias(out, *names, c_name);
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}
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}
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int main(int argc, char* argv[])
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{
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char* aliases_file_name;
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FILE* aliases_file;
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if (argc != 2)
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{
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fprintf(stderr, "Usage: %s aliases.gperf\n", argv[0]);
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return 1;
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}
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aliases_file_name = argv[1];
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aliases_file = fopen(aliases_file_name, "w");
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if (aliases_file == NULL)
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{
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fprintf(stderr, "Could not open '%s' for writing\n", aliases_file_name);
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return 1;
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}
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fprintf(aliases_file, "struct alias { int name; unsigned int encoding_index; };\n");
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fprintf(aliases_file, "%%struct-type\n");
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fprintf(aliases_file, "%%language=C++\n");
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fprintf(aliases_file, "%%define hash-function-name aliases_hash\n");
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fprintf(aliases_file, "%%define lookup-function-name aliases_lookup\n");
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fprintf(aliases_file, "%%7bit\n");
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fprintf(aliases_file, "%%readonly-tables\n");
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fprintf(aliases_file, "%%global-table\n");
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fprintf(aliases_file, "%%define word-array-name aliases\n");
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fprintf(aliases_file, "%%pic\n");
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fprintf(aliases_file, "%%%%\n");
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#define DEFENCODING(xxx_names, codepage, xxx, xxx_ifuncs1, xxx_ifuncs2, xxx_ofuncs1, xxx_ofuncs2) \
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{ \
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static const char *const names[] = BRACIFY xxx_names; \
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emit_encoding(aliases_file, names, sizeof(names) / sizeof(names[0]), #xxx); \
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}
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#define BRACIFY(...) \
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{ \
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__VA_ARGS__ \
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}
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#define DEFALIAS(xxx_alias, xxx) emit_alias(aliases_file, xxx_alias, #xxx);
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#include "encodings.def"
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#undef DEFALIAS
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#undef BRACIFY
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#undef DEFENCODING
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if (ferror(aliases_file) || fclose(aliases_file))
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return 1;
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return 0;
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}
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