mirror of
https://git.proxmox.com/git/grub2
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95614c84f8
* commands/ls.c (grub_ls_list_files): Use integer calculations for human readable format, avoid floating point use. * kern/misc.c (grub_ftoa): Remove. (grub_vsprintf): Remove floating point support.
1046 lines
18 KiB
C
1046 lines
18 KiB
C
/* misc.c - definitions of misc functions */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/misc.h>
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#include <grub/err.h>
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#include <grub/mm.h>
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#include <stdarg.h>
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#include <grub/term.h>
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#include <grub/env.h>
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#include <grub/time.h>
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void *
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grub_memmove (void *dest, const void *src, grub_size_t n)
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{
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char *d = (char *) dest;
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const char *s = (const char *) src;
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if (d < s)
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while (n--)
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*d++ = *s++;
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else
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{
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d += n;
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s += n;
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while (n--)
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*--d = *--s;
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}
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return dest;
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}
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void *memmove (void *dest, const void *src, grub_size_t n)
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__attribute__ ((alias ("grub_memmove")));
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/* GCC emits references to memcpy() for struct copies etc. */
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void *memcpy (void *dest, const void *src, grub_size_t n)
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__attribute__ ((alias ("grub_memmove")));
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char *
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grub_strcpy (char *dest, const char *src)
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{
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char *p = dest;
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while ((*p++ = *src++) != '\0')
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;
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return dest;
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}
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char *
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grub_strncpy (char *dest, const char *src, int c)
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{
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char *p = dest;
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while ((*p++ = *src++) != '\0' && --c)
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;
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return dest;
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}
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char *
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grub_stpcpy (char *dest, const char *src)
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{
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char *d = dest;
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const char *s = src;
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do
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*d++ = *s;
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while (*s++ != '\0');
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return d - 1;
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}
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char *
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grub_strcat (char *dest, const char *src)
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{
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char *p = dest;
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while (*p)
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p++;
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while ((*p = *src) != '\0')
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{
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p++;
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src++;
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}
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return dest;
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}
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char *
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grub_strncat (char *dest, const char *src, int c)
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{
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char *p = dest;
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while (*p)
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p++;
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while ((*p = *src) != '\0' && c--)
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{
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p++;
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src++;
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}
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*p = '\0';
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return dest;
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}
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int
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grub_printf (const char *fmt, ...)
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{
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va_list ap;
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int ret;
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va_start (ap, fmt);
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ret = grub_vprintf (fmt, ap);
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va_end (ap);
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return ret;
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}
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void
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grub_real_dprintf (const char *file, const int line, const char *condition,
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const char *fmt, ...)
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{
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va_list args;
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const char *debug = grub_env_get ("debug");
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if (! debug)
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return;
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if (grub_strword (debug, "all") || grub_strword (debug, condition))
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{
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grub_printf ("%s:%d: ", file, line);
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va_start (args, fmt);
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grub_vprintf (fmt, args);
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va_end (args);
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}
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}
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int
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grub_vprintf (const char *fmt, va_list args)
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{
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int ret;
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ret = grub_vsprintf (0, fmt, args);
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grub_refresh ();
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return ret;
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}
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int
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grub_memcmp (const void *s1, const void *s2, grub_size_t n)
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{
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const char *t1 = s1;
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const char *t2 = s2;
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while (n--)
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{
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if (*t1 != *t2)
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return (int) *t1 - (int) *t2;
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t1++;
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t2++;
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}
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return 0;
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}
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int memcmp (const void *s1, const void *s2, grub_size_t n)
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__attribute__ ((alias ("grub_memcmp")));
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int
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grub_strcmp (const char *s1, const char *s2)
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{
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while (*s1 && *s2)
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{
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if (*s1 != *s2)
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return (int) *s1 - (int) *s2;
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s1++;
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s2++;
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}
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return (int) *s1 - (int) *s2;
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}
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int
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grub_strncmp (const char *s1, const char *s2, grub_size_t n)
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{
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if (n == 0)
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return 0;
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while (*s1 && *s2 && --n)
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{
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if (*s1 != *s2)
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return (int) *s1 - (int) *s2;
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s1++;
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s2++;
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}
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return (int) *s1 - (int) *s2;
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}
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int
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grub_strncasecmp (const char *s1, const char *s2, int c)
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{
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int p = 1;
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while (grub_tolower (*s1) && grub_tolower (*s2) && p < c)
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{
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if (grub_tolower (*s1) != grub_tolower (*s2))
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return (int) grub_tolower (*s1) - (int) grub_tolower (*s2);
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s1++;
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s2++;
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p++;
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}
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return (int) *s1 - (int) *s2;
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}
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char *
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grub_strchr (const char *s, int c)
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{
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while (*s)
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{
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if (*s == c)
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return (char *) s;
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s++;
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}
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return 0;
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}
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char *
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grub_strrchr (const char *s, int c)
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{
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char *p = 0;
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while (*s)
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{
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if (*s == c)
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p = (char *) s;
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s++;
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}
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return p;
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}
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/* Copied from gnulib.
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Written by Bruno Haible <bruno@clisp.org>, 2005. */
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char *
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grub_strstr (const char *haystack, const char *needle)
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{
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/* Be careful not to look at the entire extent of haystack or needle
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until needed. This is useful because of these two cases:
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- haystack may be very long, and a match of needle found early,
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- needle may be very long, and not even a short initial segment of
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needle may be found in haystack. */
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if (*needle != '\0')
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{
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/* Speed up the following searches of needle by caching its first
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character. */
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char b = *needle++;
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for (;; haystack++)
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{
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if (*haystack == '\0')
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/* No match. */
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return NULL;
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if (*haystack == b)
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/* The first character matches. */
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{
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const char *rhaystack = haystack + 1;
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const char *rneedle = needle;
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for (;; rhaystack++, rneedle++)
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{
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if (*rneedle == '\0')
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/* Found a match. */
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return (char *) haystack;
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if (*rhaystack == '\0')
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/* No match. */
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return NULL;
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if (*rhaystack != *rneedle)
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/* Nothing in this round. */
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break;
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}
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}
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}
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}
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else
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return (char *) haystack;
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}
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int
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grub_strword (const char *haystack, const char *needle)
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{
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const char *n_pos = needle;
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while (grub_iswordseparator (*haystack))
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haystack++;
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while (*haystack)
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{
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/* Crawl both the needle and the haystack word we're on. */
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while(*haystack && !grub_iswordseparator (*haystack)
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&& *haystack == *n_pos)
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{
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haystack++;
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n_pos++;
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}
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/* If we reached the end of both words at the same time, the word
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is found. If not, eat everything in the haystack that isn't the
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next word (or the end of string) and "reset" the needle. */
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if ( (!*haystack || grub_iswordseparator (*haystack))
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&& (!*n_pos || grub_iswordseparator (*n_pos)))
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return 1;
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else
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{
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n_pos = needle;
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while (*haystack && !grub_iswordseparator (*haystack))
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haystack++;
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while (grub_iswordseparator (*haystack))
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haystack++;
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}
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}
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return 0;
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}
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int
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grub_iswordseparator (int c)
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{
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return (grub_isspace (c) || c == ',' || c == ';' || c == '|' || c == '&');
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}
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int
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grub_isspace (int c)
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{
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return (c == '\n' || c == '\r' || c == ' ' || c == '\t');
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}
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int
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grub_isprint (int c)
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{
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return (c >= ' ' && c <= '~');
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}
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int
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grub_isalpha (int c)
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{
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return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
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}
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int
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grub_isdigit (int c)
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{
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return (c >= '0' && c <= '9');
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}
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int
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grub_isgraph (int c)
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{
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return (c >= '!' && c <= '~');
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}
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int
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grub_tolower (int c)
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{
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if (c >= 'A' && c <= 'Z')
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return c - 'A' + 'a';
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return c;
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}
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unsigned long
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grub_strtoul (const char *str, char **end, int base)
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{
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unsigned long long num;
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num = grub_strtoull (str, end, base);
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if (num > ~0UL)
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE, "overflow is detected");
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return ~0UL;
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}
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return (unsigned long) num;
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}
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unsigned long long
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grub_strtoull (const char *str, char **end, int base)
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{
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unsigned long long num = 0;
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int found = 0;
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/* Skip white spaces. */
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while (*str && grub_isspace (*str))
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str++;
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/* Guess the base, if not specified. The prefix `0x' means 16, and
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the prefix `0' means 8. */
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if (base == 0 && str[0] == '0')
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{
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if (str[1] == 'x')
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{
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if (base == 0 || base == 16)
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{
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base = 16;
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str += 2;
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}
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}
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else if (str[1] >= '0' && str[1] <= '7')
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base = 8;
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}
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if (base == 0)
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base = 10;
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while (*str)
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{
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unsigned long digit;
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digit = grub_tolower (*str) - '0';
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if (digit > 9)
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{
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digit += '0' - 'a' + 10;
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if (digit >= (unsigned long) base)
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break;
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}
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found = 1;
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/* NUM * BASE + DIGIT > ~0ULL */
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if (num > grub_divmod64 (~0ULL - digit, base, 0))
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE, "overflow is detected");
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return ~0ULL;
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}
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num = num * base + digit;
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str++;
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}
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if (! found)
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{
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grub_error (GRUB_ERR_BAD_NUMBER, "unrecognized number");
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return 0;
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}
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if (end)
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*end = (char *) str;
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return num;
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}
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char *
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grub_strdup (const char *s)
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{
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grub_size_t len;
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char *p;
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len = grub_strlen (s) + 1;
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p = (char *) grub_malloc (len);
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if (! p)
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return 0;
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return grub_memcpy (p, s, len);
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}
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char *
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grub_strndup (const char *s, grub_size_t n)
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{
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grub_size_t len;
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char *p;
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len = grub_strlen (s);
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if (len > n)
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len = n;
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p = (char *) grub_malloc (len + 1);
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if (! p)
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return 0;
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grub_memcpy (p, s, len);
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p[len] = '\0';
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return p;
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}
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void *
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grub_memset (void *s, int c, grub_size_t n)
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{
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unsigned char *p = (unsigned char *) s;
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while (n--)
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*p++ = (unsigned char) c;
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return s;
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}
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void *memset (void *s, int c, grub_size_t n)
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__attribute__ ((alias ("grub_memset")));
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grub_size_t
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grub_strlen (const char *s)
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{
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const char *p = s;
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while (*p)
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p++;
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return p - s;
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}
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static inline void
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grub_reverse (char *str)
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{
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char *p = str + grub_strlen (str) - 1;
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while (str < p)
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{
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char tmp;
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tmp = *str;
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*str = *p;
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*p = tmp;
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str++;
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p--;
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}
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}
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static char *
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grub_itoa (char *str, int c, unsigned n)
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{
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unsigned base = (c == 'x') ? 16 : 10;
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char *p;
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if ((int) n < 0 && c == 'd')
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{
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n = (unsigned) (-((int) n));
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*str++ = '-';
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}
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p = str;
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do
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{
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unsigned d = n % base;
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*p++ = (d > 9) ? d + 'a' - 10 : d + '0';
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}
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while (n /= base);
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*p = 0;
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grub_reverse (str);
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return p;
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}
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/* Divide N by D, return the quotient, and store the remainder in *R. */
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grub_uint64_t
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grub_divmod64 (grub_uint64_t n, grub_uint32_t d, grub_uint32_t *r)
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{
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/* This algorithm is typically implemented by hardware. The idea
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is to get the highest bit in N, 64 times, by keeping
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upper(N * 2^i) = upper((Q * 10 + M) * 2^i), where upper
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represents the high 64 bits in 128-bits space. */
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unsigned bits = 64;
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unsigned long long q = 0;
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unsigned m = 0;
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/* Skip the slow computation if 32-bit arithmetic is possible. */
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if (n < 0xffffffff)
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{
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if (r)
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*r = ((grub_uint32_t) n) % d;
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return ((grub_uint32_t) n) / d;
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}
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while (bits--)
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{
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m <<= 1;
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if (n & (1ULL << 63))
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m |= 1;
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q <<= 1;
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n <<= 1;
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if (m >= d)
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{
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q |= 1;
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m -= d;
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}
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}
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if (r)
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*r = m;
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return q;
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}
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|
|
/* Convert a long long value to a string. This function avoids 64-bit
|
|
modular arithmetic or divisions. */
|
|
static char *
|
|
grub_lltoa (char *str, int c, unsigned long long n)
|
|
{
|
|
unsigned base = (c == 'x') ? 16 : 10;
|
|
char *p;
|
|
|
|
if ((long long) n < 0 && c == 'd')
|
|
{
|
|
n = (unsigned long long) (-((long long) n));
|
|
*str++ = '-';
|
|
}
|
|
|
|
p = str;
|
|
|
|
if (base == 16)
|
|
do
|
|
{
|
|
unsigned d = (unsigned) (n & 0xf);
|
|
*p++ = (d > 9) ? d + 'a' - 10 : d + '0';
|
|
}
|
|
while (n >>= 4);
|
|
else
|
|
/* BASE == 10 */
|
|
do
|
|
{
|
|
unsigned m;
|
|
|
|
n = grub_divmod64 (n, 10, &m);
|
|
*p++ = m + '0';
|
|
}
|
|
while (n);
|
|
|
|
*p = 0;
|
|
|
|
grub_reverse (str);
|
|
return p;
|
|
}
|
|
|
|
int
|
|
grub_vsprintf (char *str, const char *fmt, va_list args)
|
|
{
|
|
char c;
|
|
int count = 0;
|
|
auto void write_char (unsigned char ch);
|
|
auto void write_str (const char *s);
|
|
auto void write_fill (const char ch, int n);
|
|
|
|
void write_char (unsigned char ch)
|
|
{
|
|
if (str)
|
|
*str++ = ch;
|
|
else
|
|
grub_putchar (ch);
|
|
|
|
count++;
|
|
}
|
|
|
|
void write_str (const char *s)
|
|
{
|
|
while (*s)
|
|
write_char (*s++);
|
|
}
|
|
|
|
void write_fill (const char ch, int n)
|
|
{
|
|
int i;
|
|
for (i = 0; i < n; i++)
|
|
write_char (ch);
|
|
}
|
|
|
|
while ((c = *fmt++) != 0)
|
|
{
|
|
if (c != '%')
|
|
write_char (c);
|
|
else
|
|
{
|
|
char tmp[32];
|
|
char *p;
|
|
unsigned int format1 = 0;
|
|
unsigned int format2 = 3;
|
|
char zerofill = ' ';
|
|
int rightfill = 0;
|
|
int n;
|
|
int longfmt = 0;
|
|
int longlongfmt = 0;
|
|
|
|
if (*fmt && *fmt =='-')
|
|
{
|
|
rightfill = 1;
|
|
fmt++;
|
|
}
|
|
|
|
p = (char *) fmt;
|
|
/* Read formatting parameters. */
|
|
while (*p && grub_isdigit (*p))
|
|
p++;
|
|
|
|
if (p > fmt)
|
|
{
|
|
char s[p - fmt + 1];
|
|
grub_strncpy (s, fmt, p - fmt);
|
|
s[p - fmt] = 0;
|
|
if (s[0] == '0')
|
|
zerofill = '0';
|
|
format1 = grub_strtoul (s, 0, 10);
|
|
fmt = p;
|
|
if (*p && *p == '.')
|
|
{
|
|
p++;
|
|
fmt++;
|
|
while (*p && grub_isdigit (*p))
|
|
p++;
|
|
|
|
if (p > fmt)
|
|
{
|
|
char fstr[p - fmt];
|
|
grub_strncpy (fstr, fmt, p - fmt);
|
|
format2 = grub_strtoul (fstr, 0, 10);
|
|
fmt = p;
|
|
}
|
|
}
|
|
}
|
|
|
|
c = *fmt++;
|
|
if (c == 'l')
|
|
{
|
|
longfmt = 1;
|
|
c = *fmt++;
|
|
if (c == 'l')
|
|
{
|
|
longlongfmt = 1;
|
|
c = *fmt++;
|
|
}
|
|
}
|
|
|
|
switch (c)
|
|
{
|
|
case 'p':
|
|
write_str ("0x");
|
|
c = 'x';
|
|
longlongfmt |= (sizeof (void *) == sizeof (long long));
|
|
/* fall through */
|
|
case 'x':
|
|
case 'u':
|
|
case 'd':
|
|
if (longlongfmt)
|
|
{
|
|
long long ll;
|
|
|
|
ll = va_arg (args, long long);
|
|
grub_lltoa (tmp, c, ll);
|
|
}
|
|
else
|
|
{
|
|
if (longfmt)
|
|
n = va_arg (args, long);
|
|
else
|
|
n = va_arg (args, int);
|
|
grub_itoa (tmp, c, n);
|
|
}
|
|
if (! rightfill && grub_strlen (tmp) < format1)
|
|
write_fill (zerofill, format1 - grub_strlen (tmp));
|
|
write_str (tmp);
|
|
if (rightfill && grub_strlen (tmp) < format1)
|
|
write_fill (zerofill, format1 - grub_strlen (tmp));
|
|
break;
|
|
|
|
case 'c':
|
|
n = va_arg (args, int);
|
|
write_char (n & 0xff);
|
|
break;
|
|
|
|
case 'C':
|
|
{
|
|
grub_uint32_t code = va_arg (args, grub_uint32_t);
|
|
int shift;
|
|
unsigned mask;
|
|
|
|
if (code <= 0x7f)
|
|
{
|
|
shift = 0;
|
|
mask = 0;
|
|
}
|
|
else if (code <= 0x7ff)
|
|
{
|
|
shift = 6;
|
|
mask = 0xc0;
|
|
}
|
|
else if (code <= 0xffff)
|
|
{
|
|
shift = 12;
|
|
mask = 0xe0;
|
|
}
|
|
else if (code <= 0x1fffff)
|
|
{
|
|
shift = 18;
|
|
mask = 0xf0;
|
|
}
|
|
else if (code <= 0x3ffffff)
|
|
{
|
|
shift = 24;
|
|
mask = 0xf8;
|
|
}
|
|
else if (code <= 0x7fffffff)
|
|
{
|
|
shift = 30;
|
|
mask = 0xfc;
|
|
}
|
|
else
|
|
{
|
|
code = '?';
|
|
shift = 0;
|
|
mask = 0;
|
|
}
|
|
|
|
write_char (mask | (code >> shift));
|
|
|
|
for (shift -= 6; shift >= 0; shift -= 6)
|
|
write_char (0x80 | (0x3f & (code >> shift)));
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
p = va_arg (args, char *);
|
|
if (p)
|
|
{
|
|
if (!rightfill && grub_strlen (p) < format1)
|
|
write_fill (zerofill, format1 - grub_strlen (p));
|
|
|
|
write_str (p);
|
|
|
|
if (rightfill && grub_strlen (p) < format1)
|
|
write_fill (zerofill, format1 - grub_strlen (p));
|
|
}
|
|
else
|
|
write_str ("(null)");
|
|
|
|
break;
|
|
|
|
default:
|
|
write_char (c);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (str)
|
|
*str = '\0';
|
|
|
|
if (count && !str)
|
|
grub_refresh ();
|
|
|
|
return count;
|
|
}
|
|
|
|
int
|
|
grub_sprintf (char *str, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start (ap, fmt);
|
|
ret = grub_vsprintf (str, fmt, ap);
|
|
va_end (ap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Convert UTF-16 to UTF-8. */
|
|
grub_uint8_t *
|
|
grub_utf16_to_utf8 (grub_uint8_t *dest, grub_uint16_t *src,
|
|
grub_size_t size)
|
|
{
|
|
grub_uint32_t code_high = 0;
|
|
|
|
while (size--)
|
|
{
|
|
grub_uint32_t code = *src++;
|
|
|
|
if (code_high)
|
|
{
|
|
if (code >= 0xDC00 && code <= 0xDFFF)
|
|
{
|
|
/* Surrogate pair. */
|
|
code = ((code_high - 0xD800) << 12) + (code - 0xDC00) + 0x10000;
|
|
|
|
*dest++ = (code >> 18) | 0xF0;
|
|
*dest++ = ((code >> 12) & 0x3F) | 0x80;
|
|
*dest++ = ((code >> 6) & 0x3F) | 0x80;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
else
|
|
{
|
|
/* Error... */
|
|
*dest++ = '?';
|
|
}
|
|
|
|
code_high = 0;
|
|
}
|
|
else
|
|
{
|
|
if (code <= 0x007F)
|
|
*dest++ = code;
|
|
else if (code <= 0x07FF)
|
|
{
|
|
*dest++ = (code >> 6) | 0xC0;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
else if (code >= 0xD800 && code <= 0xDBFF)
|
|
{
|
|
code_high = code;
|
|
continue;
|
|
}
|
|
else if (code >= 0xDC00 && code <= 0xDFFF)
|
|
{
|
|
/* Error... */
|
|
*dest++ = '?';
|
|
}
|
|
else
|
|
{
|
|
*dest++ = (code >> 12) | 0xE0;
|
|
*dest++ = ((code >> 6) & 0x3F) | 0x80;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
}
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
/* Convert an UTF-8 string to an UCS-4 string. Return the number of
|
|
characters converted. DEST must be able to hold at least SIZE
|
|
characters (when the input is unknown). If an invalid sequence is found,
|
|
return -1. */
|
|
grub_ssize_t
|
|
grub_utf8_to_ucs4 (grub_uint32_t *dest, const grub_uint8_t *src,
|
|
grub_size_t size)
|
|
{
|
|
grub_uint32_t *p = dest;
|
|
int count = 0;
|
|
grub_uint32_t code = 0;
|
|
|
|
while (size--)
|
|
{
|
|
grub_uint32_t c = *src++;
|
|
|
|
if (count)
|
|
{
|
|
if ((c & 0xc0) != 0x80)
|
|
{
|
|
/* invalid */
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
code <<= 6;
|
|
code |= (c & 0x3f);
|
|
count--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((c & 0x80) == 0x00)
|
|
code = c;
|
|
else if ((c & 0xe0) == 0xc0)
|
|
{
|
|
count = 1;
|
|
code = c & 0x1f;
|
|
}
|
|
else if ((c & 0xf0) == 0xe0)
|
|
{
|
|
count = 2;
|
|
code = c & 0x0f;
|
|
}
|
|
else if ((c & 0xf8) == 0xf0)
|
|
{
|
|
count = 3;
|
|
code = c & 0x07;
|
|
}
|
|
else if ((c & 0xfc) == 0xf8)
|
|
{
|
|
count = 4;
|
|
code = c & 0x03;
|
|
}
|
|
else if ((c & 0xfe) == 0xfc)
|
|
{
|
|
count = 5;
|
|
code = c & 0x01;
|
|
}
|
|
else
|
|
/* invalid */
|
|
return -1;
|
|
}
|
|
|
|
if (count == 0)
|
|
*p++ = code;
|
|
}
|
|
|
|
return p - dest;
|
|
}
|
|
|
|
void
|
|
grub_millisleep_generic (grub_uint32_t ms)
|
|
{
|
|
grub_uint32_t end_at;
|
|
|
|
end_at = grub_get_rtc () + grub_div_roundup (ms * GRUB_TICKS_PER_SECOND, 1000);
|
|
|
|
while (grub_get_rtc () < end_at)
|
|
grub_cpu_idle ();
|
|
}
|
|
|
|
/* Abort GRUB. This function does not return. */
|
|
void
|
|
grub_abort (void)
|
|
{
|
|
if (grub_term_get_current ())
|
|
{
|
|
grub_printf ("\nAborted. Press any key to exit.");
|
|
grub_getkey ();
|
|
}
|
|
|
|
grub_exit ();
|
|
}
|
|
/* GCC emits references to abort(). */
|
|
void abort (void) __attribute__ ((alias ("grub_abort")));
|