88 lines
2.4 KiB
Awk
88 lines
2.4 KiB
Awk
# Script to produce bits/errno.h for NaCl.
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# Copyright (C) 2015-2017 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# 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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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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BEGIN { maxerrno = 0 }
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$1 == "#define" && $2 ~ /NACL_ABI_E[A-Z0-9_]+/ && $3 ~ /[0-9]+/ {
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ename = $2;
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sub(/NACL_ABI_/, "", ename);
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errno = $3 + 0;
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if (errno > maxerrno) maxerrno = errno;
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errnos[errno] = ename;
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errnos_by_name[ename] = errno;
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if ($4 == "/*" && !(ename in errno_text)) {
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etext = $5;
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for (i = 6; i <= NF && $i != "*/"; ++i)
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etext = etext " " $i;
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errno_text[ename] = etext;
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}
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next;
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}
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$1 == "@comment" && $2 == "errno.h" { errnoh=1; next }
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errnoh == 1 && $1 == "@comment" {
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++errnoh;
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etext = $3;
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for (i = 4; i <= NF; ++i)
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etext = etext " " $i;
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next;
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}
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errnoh == 2 && $1 == "@deftypevr" && $2 == "Macro" && $3 == "int" {
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ename = $4;
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errno_text[ename] = etext;
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next;
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}
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function define_errno(errno, ename) {
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etext = errno_text[ename];
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if (length(ename) < 8) ename = ename "\t";
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printf "#define\t%s\t%d\t/* %s */\n", ename, errno, etext;
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}
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END {
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print "\
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/* This file generated by errnos.awk. */\n\
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\n\
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#if !defined __Emath_defined && (defined _ERRNO_H || defined __need_Emath)\n\
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#undef __need_Emath\n\
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#define __Emath_defined 1";
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emath["EDOM"] = emath["EILSEQ"] = emath["ERANGE"] = 1;
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for (ename in emath) {
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errno = errnos_by_name[ename];
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define_errno(errno, ename);
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delete errnos[errno];
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}
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print "\
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#endif\n\
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\n\
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#ifdef _ERRNO_H\n";
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for (i = 1; i <= maxerrno; ++i)
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if (i in errnos) define_errno(i, errnos[i]);
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print "\n\
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#define EWOULDBLOCK EAGAIN\n\
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#define ENOTSUP EOPNOTSUPP\n\
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\n\
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extern __thread int errno __attribute__ ((__tls_model__ (\"initial-exec\")));\n\
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#define errno errno\n\
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\n\
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#endif";
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}
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