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# Copyright (C) 1991-2017 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library 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
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
# errno.texinfo contains lines like:
# @comment errno.h
# @comment POSIX.1: Function not implemented
# @deftypevr Macro int ENOSYS
# @comment errno 123
BEGIN {
print "/* This file generated by errnos.awk. */";
print "";
print "/* The Hurd uses Mach error system 0x10, currently only subsystem 0. */";
print "#ifndef _HURD_ERRNO";
print "#define _HURD_ERRNO(n)\t((0x10 << 26) | ((n) & 0x3fff))";
print "#endif";
print "";
print "#ifdef _ERRNO_H\n";
print "enum __error_t_codes\n{";
print "\t/* The value zero always means success and it is perfectly fine for";
print "\t code to use 0 explicitly (or implicitly, e.g. via Boolean coercion).";
print "\t Having an enum entry for zero both makes the debugger print the name";
print "\t for error_t-typed zero values, and prevents the compiler from";
print "\t issuing warnings about 'case 0:' in a switch on an error_t-typed";
print "\t value. */";
print "\tESUCCESS = 0,"
print "";
errnoh = 0;
maxerrno = 0;
in_mach_errors = "";
in_math = 0;
edom = erange = "";
print "#undef EDOM\n#undef ERANGE";
lno = 0;
}
$1 == "@comment" && $2 == "errno.h" { errnoh=1; next }
$1 == "@comment" && errnoh == 1 \
{
++errnoh;
etext = "";
for (i = 3; i <= NF; ++i)
etext = etext " " $i;
next;
}
errnoh == 2 && $1 == "@deftypevr" && $2 == "Macro" && $3 == "int" \
{ ++errnoh; e = $4; next; }
errnoh == 3 && $1 == "@comment" && $2 == "errno" {
if (e == "EWOULDBLOCK")
{
lines[lno++]="#define EWOULDBLOCK EAGAIN /* Operation would block */";
next;
}
errno = $3 + 0;
if (errno == 0)
next;
if (errno > maxerrno) maxerrno = errno;
x = sprintf ("%-40s/*%s */", sprintf ("%-24s%s", "#define\t" e,
"_HURD_ERRNO (" errno ")"),
etext);
if (e == "EDOM")
edom = x;
else if (e == "ERANGE")
erange = x;
comma[lno] = 1;
lines[lno++] = sprintf("\t%-16s= _HURD_ERRNO (%d)", e, errno);
lines[lno++] = x;
next;
}
{ errnoh=0 }
NF == 3 && $1 == "#define" && $2 == "MACH_SEND_IN_PROGRESS" \
{
in_mach_errors = FILENAME;
lines[lno++] = "\n\t/* Errors from <mach/message.h>. */";
}
NF == 3 && $1 == "#define" && $2 == "KERN_SUCCESS" \
{
in_mach_errors = FILENAME;
lines[lno++] = "\n\t/* Errors from <mach/kern_return.h>. */";
next;
}
in_mach_errors != "" && $2 == "MACH_IPC_COMPAT" \
{
in_mach_errors = "";
}
in_mach_errors == FILENAME && NF == 3 && $1 == "#define" \
{
comma[lno] = 1;
lines[lno++] = sprintf("\t%-32s= %s", "E" $2, $3);
}
$1 == "#define" && $2 == "_MACH_MIG_ERRORS_H_" \
{
in_mig_errors = 1;
lines[lno++] = "\n\t/* Errors from <mach/mig_errors.h>. */";
next;
}
in_mig_errors && $1 == "#endif" && $3 == "_MACH_MIG_ERRORS_H_" \
{
in_mig_errors = 0;
}
(in_mig_errors && $1 == "#define" && $3 <= -300) || \
(in_device_errors && $1 == "#define" && /D_/ && NF > 3) \
{
comment = "";
for (i = 4; i <= NF; ++i)
comment = comment " " $i;
comma[lno] = 1;
lines[lno++] = sprintf("%-32s", sprintf ("\t%-24s= %s", "E" $2, $3)) comment;
}
$1 == "#define" && $2 == "D_SUCCESS" \
{
in_device_errors = 1;
lines[lno++] = "\n\t/* Errors from <device/device_types.h>. */";
next;
}
in_device_errors && $1 == "#endif" \
{
in_device_errors = 0;
}
END \
{
for (i = 0; i < lno - 1; ++i)
printf "%s%s\n", lines[i], (comma[i] ? "," : "");
print lines[i];
print "";
print "};";
print "";
printf "#define\t_HURD_ERRNOS\t%d\n", maxerrno+1;
print "";
print "\
/* User-visible type of error codes. It is ok to use `int' or\n\
`kern_return_t' for these, but with `error_t' the debugger prints\n\
symbolic values. */";
print "#ifdef __USE_GNU";
print "typedef enum __error_t_codes error_t;"
print "#define __error_t_defined\t1"
print "#endif";
print "";
print "\
/* Return the current thread's location for `errno'.\n\
The syntax of this function allows redeclarations like `int errno'. */\n\
extern int *__errno_location (void) __THROW __attribute__ ((__const__));\n\
\n\
#define errno (*__errno_location ())\n\
";
print "#endif /* <errno.h> included. */";
print "";
print "#if !defined (_ERRNO_H) && defined (__need_Emath)";
print edom; print erange;
print "#endif /* <errno.h> not included and need math error codes. */";
}
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