146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
/*
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* Copyright (c) 2001 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2004-2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 1999-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ioctl_iocdef.h"
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struct ioctlent {
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const char *info;
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const char *name;
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unsigned int dir;
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unsigned int type_nr;
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unsigned int size;
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};
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static int
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is_prefix(const char *s1, const char *s2)
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{
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size_t len = strlen(s1);
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if (len > strlen(s2))
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return 0;
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return !memcmp(s1, s2, len);
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}
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static int
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compare_name_info(const void *a, const void *b)
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{
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int rc;
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const char *name1 = ((struct ioctlent *) a)->name;
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const char *name2 = ((struct ioctlent *) b)->name;
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const char *info1 = ((struct ioctlent *) a)->info;
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const char *info2 = ((struct ioctlent *) b)->info;
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rc = strcmp(name1, name2);
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if (rc)
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return rc;
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/*
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* exception from lexicographical order:
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* "asm/" < "asm-generic/"
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*/
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if (is_prefix("asm/", info1) &&
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is_prefix("asm-generic/", info2))
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return -1;
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if (is_prefix("asm/", info2) &&
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is_prefix("asm-generic/", info1))
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return 1;
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return strcmp(info1, info2);
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}
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static unsigned int
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code(const struct ioctlent *e)
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{
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return e->type_nr |
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(e->size << _IOC_SIZESHIFT) |
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(e->dir << _IOC_DIRSHIFT);
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}
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static int
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compare_code_name(const void *a, const void *b)
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{
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unsigned int code1 = code((struct ioctlent *) a);
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unsigned int code2 = code((struct ioctlent *) b);
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const char *name1 = ((struct ioctlent *) a)->name;
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const char *name2 = ((struct ioctlent *) b)->name;
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return (code1 > code2) ?
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1 : (code1 < code2) ? -1 : strcmp(name1, name2);
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}
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static void
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ioctlsort(struct ioctlent *ioctls, size_t nioctls)
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{
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size_t i;
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qsort(ioctls, nioctls, sizeof(ioctls[0]), compare_name_info);
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for (i = 1; i < nioctls; ++i)
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if (!strcmp(ioctls[i-1].name, ioctls[i].name)) {
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/*
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* If there are multiple definitions for the same
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* name, keep the first one and mark all the rest
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* for deletion.
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*/
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ioctls[i].info = NULL;
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}
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for (i = 1; i < nioctls; ++i)
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if (!ioctls[i].info) {
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/*
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* Change ioctl code of marked elements
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* to make them sorted to the end of array.
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*/
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ioctls[i].dir =
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ioctls[i].type_nr =
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ioctls[i].size = 0xffffffffu;
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}
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qsort(ioctls, nioctls, sizeof(ioctls[0]), compare_code_name);
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puts("/* Generated by ioctlsort. */");
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for (i = 0; i < nioctls; ++i) {
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if (!ioctls[i].info) {
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/*
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* We've reached the first element marked for deletion.
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*/
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break;
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}
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if (i == 0 || code(&ioctls[i-1]) != code(&ioctls[i]) ||
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!is_prefix(ioctls[i-1].name, ioctls[i].name))
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printf("{ \"%s\", %#010x },\n",
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ioctls[i].name, code(ioctls+i));
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}
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}
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static struct ioctlent ioctls[] = {
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#ifdef IOCTLSORT_INC
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# include IOCTLSORT_INC
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#else
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# include "ioctls_arch.h"
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# include "ioctls_inc.h"
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#endif
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};
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int
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main(void)
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{
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ioctlsort(ioctls, sizeof(ioctls) / sizeof(ioctls[0]));
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return 0;
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}
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