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1.1 root 1: /* misc.h - prototypes for misc functions */
2: /*
3: * GRUB -- GRand Unified Bootloader
4: * Copyright (C) 2002,2003,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
5: *
6: * GRUB is free software: you can redistribute it and/or modify
7: * it under the terms of the GNU General Public License as published by
8: * the Free Software Foundation, either version 3 of the License, or
9: * (at your option) any later version.
10: *
11: * GRUB is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: * GNU General Public License for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
18: */
19:
20: #ifndef GRUB_MISC_HEADER
21: #define GRUB_MISC_HEADER 1
22:
23: #include <stdarg.h>
24: #include <grub/types.h>
25: #include <grub/symbol.h>
26: #include <grub/err.h>
27: #include <grub/i18n.h>
28: #include <grub/compiler.h>
29:
30: #define ALIGN_UP(addr, align) \
31: ((addr + (typeof (addr)) align - 1) & ~((typeof (addr)) align - 1))
32: #define ALIGN_UP_OVERHEAD(addr, align) ((-(addr)) & ((typeof (addr)) (align) - 1))
33: #define ALIGN_DOWN(addr, align) \
34: ((addr) & ~((typeof (addr)) align - 1))
35: #define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0]))
36: #define COMPILE_TIME_ASSERT(cond) switch (0) { case 1: case !(cond): ; }
37:
38: #define grub_dprintf(condition, ...) grub_real_dprintf(GRUB_FILE, __LINE__, condition, __VA_ARGS__)
39:
40: void *EXPORT_FUNC(grub_memmove) (void *dest, const void *src, grub_size_t n);
41: char *EXPORT_FUNC(grub_strcpy) (char *dest, const char *src);
42:
43: static inline char *
44: grub_strncpy (char *dest, const char *src, int c)
45: {
46: char *p = dest;
47:
48: while ((*p++ = *src++) != '\0' && --c)
49: ;
50:
51: return dest;
52: }
53:
54: static inline char *
55: grub_stpcpy (char *dest, const char *src)
56: {
57: char *d = dest;
58: const char *s = src;
59:
60: do
61: *d++ = *s;
62: while (*s++ != '\0');
63:
64: return d - 1;
65: }
66:
67: /* XXX: If grub_memmove is too slow, we must implement grub_memcpy. */
68: static inline void *
69: grub_memcpy (void *dest, const void *src, grub_size_t n)
70: {
71: return grub_memmove (dest, src, n);
72: }
73:
74: #if defined (__APPLE__) && defined(__i386__) && !defined (GRUB_UTIL)
75: #define GRUB_BUILTIN_ATTR __attribute__ ((regparm(0)))
76: #else
77: #define GRUB_BUILTIN_ATTR
78: #endif
79:
80: #if defined(__x86_64__) && !defined (GRUB_UTIL)
81: #if defined (__MINGW32__) || defined (__CYGWIN__) || defined (__MINGW64__)
82: #define GRUB_ASM_ATTR __attribute__ ((sysv_abi))
83: #else
84: #define GRUB_ASM_ATTR
85: #endif
86: #endif
87:
88: /* Prototypes for aliases. */
89: #ifndef GRUB_UTIL
90: int GRUB_BUILTIN_ATTR EXPORT_FUNC(memcmp) (const void *s1, const void *s2, grub_size_t n);
91: void *GRUB_BUILTIN_ATTR EXPORT_FUNC(memmove) (void *dest, const void *src, grub_size_t n);
92: void *GRUB_BUILTIN_ATTR EXPORT_FUNC(memcpy) (void *dest, const void *src, grub_size_t n);
93: void *GRUB_BUILTIN_ATTR EXPORT_FUNC(memset) (void *s, int c, grub_size_t n);
94:
95: #ifdef __APPLE__
96: void GRUB_BUILTIN_ATTR EXPORT_FUNC (__bzero) (void *s, grub_size_t n);
97: #endif
98:
99: #endif
100:
101: int EXPORT_FUNC(grub_memcmp) (const void *s1, const void *s2, grub_size_t n);
102: int EXPORT_FUNC(grub_strcmp) (const char *s1, const char *s2);
103: int EXPORT_FUNC(grub_strncmp) (const char *s1, const char *s2, grub_size_t n);
104:
105: char *EXPORT_FUNC(grub_strchr) (const char *s, int c);
106: char *EXPORT_FUNC(grub_strrchr) (const char *s, int c);
107: int EXPORT_FUNC(grub_strword) (const char *s, const char *w);
108:
109: /* Copied from gnulib.
110: Written by Bruno Haible <[email protected]>, 2005. */
111: static inline char *
112: grub_strstr (const char *haystack, const char *needle)
113: {
114: /* Be careful not to look at the entire extent of haystack or needle
115: until needed. This is useful because of these two cases:
116: - haystack may be very long, and a match of needle found early,
117: - needle may be very long, and not even a short initial segment of
118: needle may be found in haystack. */
119: if (*needle != '\0')
120: {
121: /* Speed up the following searches of needle by caching its first
122: character. */
123: char b = *needle++;
124:
125: for (;; haystack++)
126: {
127: if (*haystack == '\0')
128: /* No match. */
129: return 0;
130: if (*haystack == b)
131: /* The first character matches. */
132: {
133: const char *rhaystack = haystack + 1;
134: const char *rneedle = needle;
135:
136: for (;; rhaystack++, rneedle++)
137: {
138: if (*rneedle == '\0')
139: /* Found a match. */
140: return (char *) haystack;
141: if (*rhaystack == '\0')
142: /* No match. */
143: return 0;
144: if (*rhaystack != *rneedle)
145: /* Nothing in this round. */
146: break;
147: }
148: }
149: }
150: }
151: else
152: return (char *) haystack;
153: }
154:
155: int EXPORT_FUNC(grub_isspace) (int c);
156:
157: static inline int
158: grub_isprint (int c)
159: {
160: return (c >= ' ' && c <= '~');
161: }
162:
163: static inline int
164: grub_iscntrl (int c)
165: {
166: return (c >= 0x00 && c <= 0x1F) || c == 0x7F;
167: }
168:
169: static inline int
170: grub_isalpha (int c)
171: {
172: return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
173: }
174:
175: static inline int
176: grub_islower (int c)
177: {
178: return (c >= 'a' && c <= 'z');
179: }
180:
181: static inline int
182: grub_isupper (int c)
183: {
184: return (c >= 'A' && c <= 'Z');
185: }
186:
187: static inline int
188: grub_isgraph (int c)
189: {
190: return (c >= '!' && c <= '~');
191: }
192:
193: static inline int
194: grub_isdigit (int c)
195: {
196: return (c >= '0' && c <= '9');
197: }
198:
199: static inline int
200: grub_isxdigit (int c)
201: {
202: return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
203: }
204:
205: static inline int
206: grub_isalnum (int c)
207: {
208: return grub_isalpha (c) || grub_isdigit (c);
209: }
210:
211: static inline int
212: grub_tolower (int c)
213: {
214: if (c >= 'A' && c <= 'Z')
215: return c - 'A' + 'a';
216:
217: return c;
218: }
219:
220: static inline int
221: grub_toupper (int c)
222: {
223: if (c >= 'a' && c <= 'z')
224: return c - 'a' + 'A';
225:
226: return c;
227: }
228:
229: static inline int
230: grub_strcasecmp (const char *s1, const char *s2)
231: {
232: while (*s1 && *s2)
233: {
234: if (grub_tolower ((grub_uint8_t) *s1)
235: != grub_tolower ((grub_uint8_t) *s2))
236: break;
237:
238: s1++;
239: s2++;
240: }
241:
242: return (int) grub_tolower ((grub_uint8_t) *s1)
243: - (int) grub_tolower ((grub_uint8_t) *s2);
244: }
245:
246: static inline int
247: grub_strncasecmp (const char *s1, const char *s2, grub_size_t n)
248: {
249: if (n == 0)
250: return 0;
251:
252: while (*s1 && *s2 && --n)
253: {
254: if (grub_tolower (*s1) != grub_tolower (*s2))
255: break;
256:
257: s1++;
258: s2++;
259: }
260:
261: return (int) grub_tolower ((grub_uint8_t) *s1)
262: - (int) grub_tolower ((grub_uint8_t) *s2);
263: }
264:
265: unsigned long EXPORT_FUNC(grub_strtoul) (const char *str, char **end, int base);
266: unsigned long long EXPORT_FUNC(grub_strtoull) (const char *str, char **end, int base);
267:
268: static inline long
269: grub_strtol (const char *str, char **end, int base)
270: {
271: int negative = 0;
272: unsigned long long magnitude;
273:
274: while (*str && grub_isspace (*str))
275: str++;
276:
277: if (*str == '-')
278: {
279: negative = 1;
280: str++;
281: }
282:
283: magnitude = grub_strtoull (str, end, base);
284: if (negative)
285: {
286: if (magnitude > (unsigned long) GRUB_LONG_MAX + 1)
287: {
288: grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
289: return GRUB_LONG_MIN;
290: }
291: return -((long) magnitude);
292: }
293: else
294: {
295: if (magnitude > GRUB_LONG_MAX)
296: {
297: grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
298: return GRUB_LONG_MAX;
299: }
300: return (long) magnitude;
301: }
302: }
303:
304: char *EXPORT_FUNC(grub_strdup) (const char *s) WARN_UNUSED_RESULT;
305: char *EXPORT_FUNC(grub_strndup) (const char *s, grub_size_t n) WARN_UNUSED_RESULT;
306: void *EXPORT_FUNC(grub_memset) (void *s, int c, grub_size_t n);
307: grub_size_t EXPORT_FUNC(grub_strlen) (const char *s) WARN_UNUSED_RESULT;
308: int EXPORT_FUNC(grub_printf) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));
309: int EXPORT_FUNC(grub_printf_) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));
310:
311: /* Replace all `ch' characters of `input' with `with' and copy the
312: result into `output'; return EOS address of `output'. */
313: static inline char *
314: grub_strchrsub (char *output, const char *input, char ch, const char *with)
315: {
316: while (*input)
317: {
318: if (*input == ch)
319: {
320: grub_strcpy (output, with);
321: output += grub_strlen (with);
322: input++;
323: continue;
324: }
325: *output++ = *input++;
326: }
327: *output = '\0';
328: return output;
329: }
330:
331: extern void (*EXPORT_VAR (grub_xputs)) (const char *str);
332:
333: static inline int
334: grub_puts (const char *s)
335: {
336: const char nl[2] = "\n";
337: grub_xputs (s);
338: grub_xputs (nl);
339:
340: return 1; /* Cannot fail. */
341: }
342:
343: int EXPORT_FUNC(grub_puts_) (const char *s);
344: void EXPORT_FUNC(grub_real_dprintf) (const char *file,
345: const int line,
346: const char *condition,
347: const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 4, 5)));
348: int EXPORT_FUNC(grub_vprintf) (const char *fmt, va_list args);
349: int EXPORT_FUNC(grub_snprintf) (char *str, grub_size_t n, const char *fmt, ...)
350: __attribute__ ((format (GNU_PRINTF, 3, 4)));
351: int EXPORT_FUNC(grub_vsnprintf) (char *str, grub_size_t n, const char *fmt,
352: va_list args);
353: char *EXPORT_FUNC(grub_xasprintf) (const char *fmt, ...)
354: __attribute__ ((format (GNU_PRINTF, 1, 2))) WARN_UNUSED_RESULT;
355: char *EXPORT_FUNC(grub_xvasprintf) (const char *fmt, va_list args) WARN_UNUSED_RESULT;
356: void EXPORT_FUNC(grub_exit) (void) __attribute__ ((noreturn));
357: grub_uint64_t EXPORT_FUNC(grub_divmod64) (grub_uint64_t n,
358: grub_uint64_t d,
359: grub_uint64_t *r);
360:
361: #if (defined (__MINGW32__) || defined (__CYGWIN__)) && !defined(GRUB_UTIL)
362: void EXPORT_FUNC (__register_frame_info) (void);
363: void EXPORT_FUNC (__deregister_frame_info) (void);
364: void EXPORT_FUNC (___chkstk_ms) (void);
365: void EXPORT_FUNC (__chkstk_ms) (void);
366: #endif
367:
368: /* Inline functions. */
369:
370: static inline char *
371: grub_memchr (const void *p, int c, grub_size_t len)
372: {
373: const char *s = (const char *) p;
374: const char *e = s + len;
375:
376: for (; s < e; s++)
377: if (*s == c)
378: return (char *) s;
379:
380: return 0;
381: }
382:
383:
384: static inline unsigned int
385: grub_abs (int x)
386: {
387: if (x < 0)
388: return (unsigned int) (-x);
389: else
390: return (unsigned int) x;
391: }
392:
393: /* Rounded-up division */
394: static inline unsigned int
395: grub_div_roundup (unsigned int x, unsigned int y)
396: {
397: return (x + y - 1) / y;
398: }
399:
400: /* Reboot the machine. */
401: #if defined (GRUB_MACHINE_EMU) || defined (GRUB_MACHINE_QEMU_MIPS)
402: void EXPORT_FUNC(grub_reboot) (void) __attribute__ ((noreturn));
403: #else
404: void grub_reboot (void) __attribute__ ((noreturn));
405: #endif
406:
407: #if defined (__clang__) && !defined (GRUB_UTIL)
408: void __attribute__ ((noreturn)) EXPORT_FUNC (abort) (void);
409: #endif
410:
411: #ifdef GRUB_MACHINE_PCBIOS
412: /* Halt the system, using APM if possible. If NO_APM is true, don't
413: * use APM even if it is available. */
414: void grub_halt (int no_apm) __attribute__ ((noreturn));
415: #elif defined (__mips__) && !defined (GRUB_MACHINE_EMU)
416: void EXPORT_FUNC (grub_halt) (void) __attribute__ ((noreturn));
417: #else
418: void grub_halt (void) __attribute__ ((noreturn));
419: #endif
420:
421: #ifdef GRUB_MACHINE_EMU
422: /* Flag to check if module loading is available. */
423: extern const int EXPORT_VAR(grub_no_modules);
424: #else
425: #define grub_no_modules 0
426: #endif
427:
428: static inline void
429: grub_error_save (struct grub_error_saved *save)
430: {
431: grub_memcpy (save->errmsg, grub_errmsg, sizeof (save->errmsg));
432: save->grub_errno = grub_errno;
433: grub_errno = GRUB_ERR_NONE;
434: }
435:
436: static inline void
437: grub_error_load (const struct grub_error_saved *save)
438: {
439: grub_memcpy (grub_errmsg, save->errmsg, sizeof (grub_errmsg));
440: grub_errno = save->grub_errno;
441: }
442:
443: #ifndef GRUB_UTIL
444:
445: #if defined (__arm__)
446:
447: grub_uint32_t
448: EXPORT_FUNC (__udivsi3) (grub_uint32_t a, grub_uint32_t b);
449:
450: grub_uint32_t
451: EXPORT_FUNC (__umodsi3) (grub_uint32_t a, grub_uint32_t b);
452:
453: #endif
454:
455: #if defined (__sparc__) || defined (__powerpc__)
456: unsigned
457: EXPORT_FUNC (__ctzdi2) (grub_uint64_t x);
458: #define NEED_CTZDI2 1
459: #endif
460:
461: #if defined (__mips__) || defined (__arm__)
462: unsigned
463: EXPORT_FUNC (__ctzsi2) (grub_uint32_t x);
464: #define NEED_CTZSI2 1
465: #endif
466:
467: #ifdef __arm__
468: grub_uint32_t
469: EXPORT_FUNC (__aeabi_uidiv) (grub_uint32_t a, grub_uint32_t b);
470: grub_uint32_t
471: EXPORT_FUNC (__aeabi_uidivmod) (grub_uint32_t a, grub_uint32_t b);
472:
473: /* Needed for allowing modules to be compiled as thumb. */
474: grub_uint64_t
475: EXPORT_FUNC (__muldi3) (grub_uint64_t a, grub_uint64_t b);
476: grub_uint64_t
477: EXPORT_FUNC (__aeabi_lmul) (grub_uint64_t a, grub_uint64_t b);
478:
479: #endif
480:
481: #if defined (__ia64__)
482:
483: grub_uint64_t
484: EXPORT_FUNC (__udivdi3) (grub_uint64_t a, grub_uint64_t b);
485:
486: grub_uint64_t
487: EXPORT_FUNC (__umoddi3) (grub_uint64_t a, grub_uint64_t b);
488:
489: #endif
490:
491: #endif /* GRUB_UTIL */
492:
493:
494: #if BOOT_TIME_STATS
495: struct grub_boot_time
496: {
497: struct grub_boot_time *next;
498: grub_uint64_t tp;
499: const char *file;
500: int line;
501: char *msg;
502: };
503:
504: extern struct grub_boot_time *EXPORT_VAR(grub_boot_time_head);
505:
506: void EXPORT_FUNC(grub_real_boot_time) (const char *file,
507: const int line,
508: const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 3, 4)));
509: #define grub_boot_time(...) grub_real_boot_time(GRUB_FILE, __LINE__, __VA_ARGS__)
510: #else
511: #define grub_boot_time(...)
512: #endif
513:
514: #define grub_max(a, b) (((a) > (b)) ? (a) : (b))
515: #define grub_min(a, b) (((a) < (b)) ? (a) : (b))
516:
517: #endif /* ! GRUB_MISC_HEADER */
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