954 lines
16 KiB
C
954 lines
16 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 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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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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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) = '\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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int
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grub_vprintf (const char *fmt, va_list args)
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{
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return grub_vsprintf (0, fmt, args);
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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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void *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, int c)
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{
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int p = 1;
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while (*s1 && *s2 && p < c)
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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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p++;
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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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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 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 (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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if (num > (~0UL - digit) / base)
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE, "overflow is detected");
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return 0;
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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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static char *
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grub_ftoa (char *str, double f, int round)
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{
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unsigned int intp;
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unsigned int fractp;
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unsigned int power = 1;
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int i;
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for (i = 0; i < round; i++)
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power *= 10;
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intp = f;
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fractp = (f - (float) intp) * power;
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grub_sprintf (str, "%d.%d", intp, fractp);
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return str;
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}
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int
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grub_vsprintf (char *str, const char *fmt, va_list args)
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{
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char c;
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int count = 0;
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auto void write_char (unsigned char ch);
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auto void write_str (const char *s);
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auto void write_fill (const char ch, int n);
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void write_char (unsigned char ch)
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{
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if (str)
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*str++ = ch;
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else
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grub_putchar (ch);
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count++;
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}
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void write_str (const char *s)
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{
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while (*s)
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write_char (*s++);
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}
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void write_fill (const char ch, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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write_char (ch);
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}
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while ((c = *fmt++) != 0)
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{
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if (c != '%')
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write_char (c);
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else
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{
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char tmp[16];
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char *p;
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unsigned int format1 = 0;
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unsigned int format2 = 3;
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char zerofill = ' ';
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int rightfill = 0;
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int n;
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if (*fmt && *fmt =='-')
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{
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rightfill = 1;
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fmt++;
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}
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p = (char *) fmt;
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/* Read formatting parameters. */
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while (*p && grub_isdigit (*p))
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p++;
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if (p > fmt)
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{
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char s[p - fmt];
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grub_strncpy (s, fmt, p - fmt);
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if (s[0] == '0')
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zerofill = '0';
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format1 = grub_strtoul (s, 0, 10);
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fmt = p;
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if (*p && *p == '.')
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{
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p++;
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fmt++;
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while (*p && grub_isdigit (*p))
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p++;
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if (p > fmt)
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{
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char fstr[p - fmt];
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grub_strncpy (fstr, fmt, p - fmt);
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format2 = grub_strtoul (fstr, 0, 10);
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fmt = p;
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}
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}
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}
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c = *fmt++;
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switch (c)
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{
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case 'p':
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write_str ("0x");
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c = 'x';
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/* fall through */
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case 'x':
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case 'u':
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case 'd':
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n = va_arg (args, int);
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grub_itoa (tmp, c, n);
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if (!rightfill && grub_strlen (tmp) < format1)
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write_fill (zerofill, format1 - grub_strlen (tmp));
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write_str (tmp);
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if (rightfill && grub_strlen (tmp) < format1)
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write_fill (zerofill, format1 - grub_strlen (tmp));
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break;
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case 'c':
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n = va_arg (args, int);
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write_char (n & 0xff);
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break;
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case 'f':
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{
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float f;
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f = va_arg (args, double);
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grub_ftoa (tmp, f, format2);
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if (!rightfill && grub_strlen (tmp) < format1)
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write_fill (zerofill, format1 - grub_strlen (tmp));
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write_str (tmp);
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if (rightfill && grub_strlen (tmp) < format1)
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write_fill (zerofill, format1 - grub_strlen (tmp));
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break;
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}
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case 'C':
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{
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grub_uint32_t code = va_arg (args, grub_uint32_t);
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int shift;
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unsigned mask;
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if (code <= 0x7f)
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{
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shift = 0;
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mask = 0;
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}
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else if (code <= 0x7ff)
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{
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shift = 6;
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mask = 0xc0;
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}
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else if (code <= 0xffff)
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{
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shift = 12;
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mask = 0xe0;
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}
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else if (code <= 0x1fffff)
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{
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shift = 18;
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mask = 0xf0;
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}
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else if (code <= 0x3ffffff)
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{
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shift = 24;
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mask = 0xf8;
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}
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else if (code <= 0x7fffffff)
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{
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shift = 30;
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mask = 0xfc;
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}
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else
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{
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code = '?';
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shift = 0;
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mask = 0;
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}
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write_char (mask | (code >> shift));
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for (shift -= 6; shift >= 0; shift -= 6)
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write_char (0x80 | (0x3f & (code >> shift)));
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}
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break;
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case 's':
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p = va_arg (args, char *);
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if (p)
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{
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if (!rightfill && grub_strlen (p) < format1)
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write_fill (zerofill, format1 - grub_strlen (p));
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write_str (p);
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|
|
|
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 UTF8. */
|
|
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 >> 16) | 0xE0;
|
|
*dest++ = ((code >> 12) & 0x3F) | 0x80;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
}
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
grub_err_t
|
|
grub_split_cmdline (const char *cmdline, grub_err_t (* getline) (char **), int *argc, char ***argv)
|
|
{
|
|
/* XXX: Fixed size buffer, perhaps this buffer should be dynamically
|
|
allocated. */
|
|
char buffer[1024];
|
|
char *bp = buffer;
|
|
char *rd = (char *) cmdline;
|
|
char unputbuf;
|
|
int unput = 0;
|
|
char *args;
|
|
int i;
|
|
|
|
auto char getchar (void);
|
|
auto void unputc (char c);
|
|
auto void getenvvar (void);
|
|
auto int getarg (void);
|
|
|
|
/* Get one character from the commandline. If the caller reads
|
|
beyond the end of the string a new line will be read. This
|
|
function will not chech for errors, the caller has to check for
|
|
grub_errno. */
|
|
char getchar (void)
|
|
{
|
|
int c;
|
|
if (unput)
|
|
{
|
|
unput = 0;
|
|
return unputbuf;
|
|
}
|
|
|
|
if (! rd)
|
|
{
|
|
getline (&rd);
|
|
/* Error is ignored here, the caller will check for this
|
|
when it reads beyond the EOL. */
|
|
c = *(rd)++;
|
|
return c;
|
|
}
|
|
|
|
c = *(rd)++;
|
|
if (! c)
|
|
{
|
|
rd = 0;
|
|
return '\n';
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
void unputc (char c)
|
|
{
|
|
unputbuf = c;
|
|
unput = 1;
|
|
}
|
|
|
|
/* Read a variable name from the commandline and insert its content
|
|
into the buffer. */
|
|
void getenvvar (void)
|
|
{
|
|
char varname[100];
|
|
char *p = varname;
|
|
char *val;
|
|
char c;
|
|
|
|
c = getchar ();
|
|
if (c == '{')
|
|
while ((c = getchar ()) != '}')
|
|
*(p++) = c;
|
|
else
|
|
{
|
|
/* XXX: An env. variable can have characters and digits in
|
|
its name, are more characters allowed here? */
|
|
while (c && (grub_isalpha (c) || grub_isdigit (c)))
|
|
{
|
|
*(p++) = c;
|
|
c = getchar ();
|
|
}
|
|
unputc (c);
|
|
}
|
|
*p = '\0';
|
|
|
|
/* The variable does not exist. */
|
|
val = grub_env_get (varname);
|
|
if (! val)
|
|
return;
|
|
|
|
/* Copy the contents of the variable into the buffer. */
|
|
for (p = val; *p; p++)
|
|
*(bp++) = *p;
|
|
}
|
|
|
|
/* Read one argument. Return 1 if no variables can be read anymore,
|
|
otherwise return 0. If there is an error, return 1, the caller
|
|
has to check grub_errno. */
|
|
int getarg (void)
|
|
{
|
|
char c;
|
|
|
|
/* Skip all whitespaces before an argument. */
|
|
do {
|
|
c = getchar ();
|
|
} while (c == ' ' || c == '\t');
|
|
|
|
do {
|
|
switch (c)
|
|
{
|
|
case '"':
|
|
/* Double quote. */
|
|
while ((c = getchar ()))
|
|
{
|
|
if (grub_errno)
|
|
return 1;
|
|
/* Read in an escaped character. */
|
|
if (c == '\\')
|
|
{
|
|
c = getchar ();
|
|
*(bp++) = c;
|
|
continue;
|
|
}
|
|
else if (c == '"')
|
|
break;
|
|
/* Read a variable. */
|
|
if (c == '$')
|
|
{
|
|
getenvvar ();
|
|
continue;
|
|
}
|
|
*(bp++) = c;
|
|
}
|
|
break;
|
|
|
|
case '\'':
|
|
/* Single quote. */
|
|
while ((c = getchar ()) != '\'')
|
|
{
|
|
if (grub_errno)
|
|
return 1;
|
|
|
|
*(bp++) = c;
|
|
}
|
|
break;
|
|
|
|
case '\n':
|
|
/* This was not a argument afterall. */
|
|
return 1;
|
|
|
|
default:
|
|
/* A normal option. */
|
|
while (c && (grub_isalpha (c)
|
|
|| grub_isdigit (c) || grub_isgraph (c)))
|
|
{
|
|
/* Read in an escaped character. */
|
|
if (c == '\\')
|
|
{
|
|
c = getchar ();
|
|
*(bp++) = c;
|
|
c = getchar ();
|
|
continue;
|
|
}
|
|
/* Read a variable. */
|
|
if (c == '$')
|
|
{
|
|
getenvvar ();
|
|
c = getchar ();
|
|
continue;
|
|
}
|
|
*(bp++) = c;
|
|
c = getchar ();
|
|
}
|
|
unputc (c);
|
|
|
|
break;
|
|
}
|
|
} while (! grub_isspace (c) && c != '\'' && c != '"');
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Read in all arguments and count them. */
|
|
*argc = 0;
|
|
while (1)
|
|
{
|
|
if (getarg ())
|
|
break;
|
|
*(bp++) = '\0';
|
|
(*argc)++;
|
|
}
|
|
|
|
/* Check if there were no errors. */
|
|
if (grub_errno)
|
|
return grub_errno;
|
|
|
|
/* Reserve memory for the return values. */
|
|
args = grub_malloc (bp - buffer);
|
|
if (! args)
|
|
return grub_errno;
|
|
grub_memcpy (args, buffer, bp - buffer);
|
|
|
|
*argv = grub_malloc (sizeof (char *) * (*argc + 1));
|
|
if (! *argv)
|
|
{
|
|
grub_free (args);
|
|
return grub_errno;
|
|
}
|
|
|
|
/* The arguments are separated with 0's, setup argv so it points to
|
|
the right values. */
|
|
bp = args;
|
|
for (i = 0; i < *argc; i++)
|
|
{
|
|
(*argv)[i] = bp;
|
|
while (*bp)
|
|
bp++;
|
|
bp++;
|
|
}
|
|
|
|
(*argc)--;
|
|
return 0;
|
|
}
|