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#!/bin/sh
# Copyright 2009 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
# Generate Go code listing error values (ENAMETOOLONG etc)
# and signal values (SIGALRM etc). They're unrelated except
# that we use the same method for finding them.
errors=$(
echo '#include <errno.h>' |
# The gcc command line prints all the #defines
# it encounters while processing the input
gcc -x c - -E -dM |
egrep -h '#define E[A-Z0-9_]+ ' $files |
sed 's/#define //; s/ .*//'
)
signals=$(
echo '#include <sys/signal.h>' |
gcc -x c - -E -dM |
egrep -h '#define SIG[^_]' |
egrep -v '#define (SIGEV_|SIGSTKSZ|SIGRT(MIN|MAX))' |
sed 's/#define //; s/ .*//'
)
# Write godefs input.
(
echo '#include <errno.h>'
echo '#include <signal.h>'
echo 'enum {'
for i in $errors $signals
do
echo '$'"$i = $i,"
done
echo '};'
) >_errors.c
echo '// mkerrors' "$@"
echo '// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT'
echo
godefs -gsyscall "$@" _errors.c
# Run C program to print error strings.
(
echo "
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
enum { A = 'A', Z = 'Z', a = 'a', z = 'z' }; // avoid need for single quotes below
int errors[] = {
"
for i in $errors
do
echo ' '$i,
done
echo '
};
int
main(void)
{
int i, j, e;
char buf[1024];
printf("\n\n// Error table\n");
printf("var errors = [...]string {\n");
for(i=0; i<nelem(errors); i++) {
e = errors[i];
for(j=0; j<i; j++)
if(errors[j] == e) // duplicate value
goto next;
strcpy(buf, strerror(e));
// lowercase first letter: Bad -> bad, but STREAM -> STREAM.
if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z)
buf[0] += a - A;
printf("\t%d: \"%s\",\n", e, buf);
next:;
}
printf("}\n\n");
}
'
) >_errors.c
gcc -o _errors _errors.c && ./_errors
rm -f _errors.c _errors
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