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lib/vsprintf.c
19.1 KB
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/* * linux/lib/vsprintf.c * * Copyright (C) 1991, 1992 Linus Torvalds */ /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ /* * Wirzenius wrote this portably, Torvalds fucked it up :-) |
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* * from hush: simple_itoa() was lifted from boa-0.93.15 |
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*/ |
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#include <common.h> |
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#include <charset.h> |
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#include <efi_loader.h> #include <div64.h> |
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#include <uuid.h> |
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#include <stdarg.h> #include <linux/ctype.h> #include <linux/err.h> #include <linux/types.h> #include <linux/string.h> |
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#define noinline __attribute__((noinline)) |
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/* we use this so that we can do without the ctype library */ #define is_digit(c) ((c) >= '0' && (c) <= '9') static int skip_atoi(const char **s) { |
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int i = 0; |
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while (is_digit(**s)) |
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i = i * 10 + *((*s)++) - '0'; |
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return i; } |
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/* Decimal conversion is by far the most typical, and is used * for /proc and /sys data. This directly impacts e.g. top performance * with many processes running. We optimize it for speed * using code from * http://www.cs.uiowa.edu/~jones/bcd/decimal.html * (with permission from the author, Douglas W. Jones). */ /* Formats correctly any integer in [0,99999]. * Outputs from one to five digits depending on input. * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ |
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static char *put_dec_trunc(char *buf, unsigned q) |
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{ unsigned d3, d2, d1, d0; d1 = (q>>4) & 0xf; d2 = (q>>8) & 0xf; d3 = (q>>12); d0 = 6*(d3 + d2 + d1) + (q & 0xf); q = (d0 * 0xcd) >> 11; d0 = d0 - 10*q; *buf++ = d0 + '0'; /* least significant digit */ d1 = q + 9*d3 + 5*d2 + d1; if (d1 != 0) { q = (d1 * 0xcd) >> 11; d1 = d1 - 10*q; *buf++ = d1 + '0'; /* next digit */ d2 = q + 2*d2; if ((d2 != 0) || (d3 != 0)) { q = (d2 * 0xd) >> 7; d2 = d2 - 10*q; *buf++ = d2 + '0'; /* next digit */ d3 = q + 4*d3; if (d3 != 0) { q = (d3 * 0xcd) >> 11; d3 = d3 - 10*q; *buf++ = d3 + '0'; /* next digit */ if (q != 0) |
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*buf++ = q + '0'; /* most sign. digit */ |
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} } } return buf; } /* Same with if's removed. Always emits five digits */ |
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static char *put_dec_full(char *buf, unsigned q) |
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{ /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ /* but anyway, gcc produces better code with full-sized ints */ unsigned d3, d2, d1, d0; d1 = (q>>4) & 0xf; d2 = (q>>8) & 0xf; d3 = (q>>12); |
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/* * Possible ways to approx. divide by 10 * gcc -O2 replaces multiply with shifts and adds * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) * (x * 0x67) >> 10: 1100111 * (x * 0x34) >> 9: 110100 - same * (x * 0x1a) >> 8: 11010 - same * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) */ |
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d0 = 6*(d3 + d2 + d1) + (q & 0xf); q = (d0 * 0xcd) >> 11; d0 = d0 - 10*q; *buf++ = d0 + '0'; d1 = q + 9*d3 + 5*d2 + d1; q = (d1 * 0xcd) >> 11; d1 = d1 - 10*q; *buf++ = d1 + '0'; d2 = q + 2*d2; q = (d2 * 0xd) >> 7; d2 = d2 - 10*q; *buf++ = d2 + '0'; d3 = q + 4*d3; q = (d3 * 0xcd) >> 11; /* - shorter code */ /* q = (d3 * 0x67) >> 10; - would also work */ d3 = d3 - 10*q; *buf++ = d3 + '0'; *buf++ = q + '0'; return buf; } /* No inlining helps gcc to use registers better */ |
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static noinline char *put_dec(char *buf, uint64_t num) |
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{ while (1) { unsigned rem; if (num < 100000) return put_dec_trunc(buf, num); rem = do_div(num, 100000); buf = put_dec_full(buf, rem); } } |
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#define ZEROPAD 1 /* pad with zero */ #define SIGN 2 /* unsigned/signed long */ #define PLUS 4 /* show plus */ #define SPACE 8 /* space if plus */ #define LEFT 16 /* left justified */ |
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#define SMALL 32 /* Must be 32 == 0x20 */ #define SPECIAL 64 /* 0x */ |
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/* * Macro to add a new character to our output string, but only if it will * fit. The macro moves to the next character position in the output string. */ #define ADDCH(str, ch) do { \ if ((str) < end) \ *(str) = (ch); \ ++str; \ } while (0) |
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static char *number(char *buf, char *end, u64 num, |
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int base, int size, int precision, int type) |
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{ |
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/* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
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static const char digits[16] = "0123456789ABCDEF"; |
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char tmp[66]; char sign; char locase; int need_pfx = ((type & SPECIAL) && base != 10); |
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int i; |
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/* locase = 0 or 0x20. ORing digits or letters with 'locase' * produces same digits or (maybe lowercased) letters */ locase = (type & SMALL); |
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if (type & LEFT) type &= ~ZEROPAD; |
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sign = 0; if (type & SIGN) { |
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if ((s64) num < 0) { |
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sign = '-'; |
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num = -(s64) num; |
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size--; } else if (type & PLUS) { sign = '+'; size--; } else if (type & SPACE) { sign = ' '; size--; } } |
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if (need_pfx) { size--; |
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if (base == 16) |
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size--; } |
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/* generate full string in tmp[], in reverse order */ |
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i = 0; if (num == 0) |
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tmp[i++] = '0'; /* Generic code, for any base: else do { tmp[i++] = (digits[do_div(num,base)] | locase); } while (num != 0); */ else if (base != 10) { /* 8 or 16 */ int mask = base - 1; int shift = 3; |
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if (base == 16) shift = 4; |
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do { |
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tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
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num >>= shift; } while (num); } else { /* base 10 */ i = put_dec(tmp, num) - tmp; } /* printing 100 using %2d gives "100", not "00" */ |
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if (i > precision) precision = i; |
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/* leading space padding */ |
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size -= precision; |
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if (!(type & (ZEROPAD + LEFT))) { while (--size >= 0) ADDCH(buf, ' '); } |
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/* sign */ |
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if (sign) |
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ADDCH(buf, sign); |
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/* "0x" / "0" prefix */ if (need_pfx) { |
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ADDCH(buf, '0'); |
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if (base == 16) |
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ADDCH(buf, 'X' | locase); |
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} /* zero or space padding */ if (!(type & LEFT)) { char c = (type & ZEROPAD) ? '0' : ' '; |
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while (--size >= 0) |
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ADDCH(buf, c); |
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} |
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/* hmm even more zero padding? */ while (i <= --precision) |
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ADDCH(buf, '0'); |
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/* actual digits of result */ while (--i >= 0) |
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ADDCH(buf, tmp[i]); |
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/* trailing space padding */ while (--size >= 0) |
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ADDCH(buf, ' '); |
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return buf; |
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} |
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static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags) |
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{ int len, i; |
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if (s == NULL) |
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s = "<NULL>"; len = strnlen(s, precision); if (!(flags & LEFT)) while (len < field_width--) |
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ADDCH(buf, ' '); |
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for (i = 0; i < len; ++i) |
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ADDCH(buf, *s++); |
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while (len < field_width--) |
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ADDCH(buf, ' '); |
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return buf; } |
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static char *string16(char *buf, char *end, u16 *s, int field_width, int precision, int flags) { u16 *str = s ? s : L"<NULL>"; int utf16_len = utf16_strnlen(str, precision); u8 utf8[utf16_len * MAX_UTF8_PER_UTF16]; int utf8_len, i; utf8_len = utf16_to_utf8(utf8, str, utf16_len) - utf8; if (!(flags & LEFT)) while (utf8_len < field_width--) ADDCH(buf, ' '); for (i = 0; i < utf8_len; ++i) ADDCH(buf, utf8[i]); while (utf8_len < field_width--) ADDCH(buf, ' '); return buf; } |
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#if defined(CONFIG_EFI_LOADER) && \ !defined(CONFIG_SPL_BUILD) && !defined(API_BUILD) static char *device_path_string(char *buf, char *end, void *dp, int field_width, int precision, int flags) { u16 *str; |
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/* If dp == NULL output the string '<NULL>' */ |
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if (!dp) |
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return string16(buf, end, dp, field_width, precision, flags); |
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str = efi_dp_str((struct efi_device_path *)dp); if (!str) return ERR_PTR(-ENOMEM); buf = string16(buf, end, str, field_width, precision, flags); efi_free_pool(str); return buf; } #endif |
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#ifdef CONFIG_CMD_NET |
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static const char hex_asc[] = "0123456789abcdef"; #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] static inline char *pack_hex_byte(char *buf, u8 byte) { *buf++ = hex_asc_hi(byte); *buf++ = hex_asc_lo(byte); return buf; } |
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static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, |
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int precision, int flags) |
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{ |
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/* (6 * 2 hex digits), 5 colons and trailing zero */ char mac_addr[6 * 3]; |
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char *p = mac_addr; int i; for (i = 0; i < 6; i++) { p = pack_hex_byte(p, addr[i]); if (!(flags & SPECIAL) && i != 5) *p++ = ':'; } *p = '\0'; |
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return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL); |
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} |
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static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, |
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int precision, int flags) { |
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/* (8 * 4 hex digits), 7 colons and trailing zero */ char ip6_addr[8 * 5]; |
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char *p = ip6_addr; int i; for (i = 0; i < 8; i++) { p = pack_hex_byte(p, addr[2 * i]); p = pack_hex_byte(p, addr[2 * i + 1]); if (!(flags & SPECIAL) && i != 7) *p++ = ':'; } *p = '\0'; |
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return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL); |
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} |
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static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, |
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int precision, int flags) { |
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/* (4 * 3 decimal digits), 3 dots and trailing zero */ char ip4_addr[4 * 4]; |
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char temp[3]; /* hold each IP quad in reverse order */ char *p = ip4_addr; int i, digits; for (i = 0; i < 4; i++) { digits = put_dec_trunc(temp, addr[i]) - temp; /* reverse the digits in the quad */ while (digits--) *p++ = temp[digits]; if (i != 3) *p++ = '.'; } *p = '\0'; |
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return string(buf, end, ip4_addr, field_width, precision, flags & ~SPECIAL); |
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} |
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#endif |
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#ifdef CONFIG_LIB_UUID /* * This works (roughly) the same way as linux's, but we currently always * print lower-case (ie. we just keep %pUB and %pUL for compat with linux), * mostly just because that is what uuid_bin_to_str() supports. * * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10 * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10 */ static char *uuid_string(char *buf, char *end, u8 *addr, int field_width, int precision, int flags, const char *fmt) { char uuid[UUID_STR_LEN + 1]; int str_format = UUID_STR_FORMAT_STD; switch (*(++fmt)) { case 'L': case 'l': str_format = UUID_STR_FORMAT_GUID; break; case 'B': case 'b': /* this is the default */ break; default: break; } uuid_bin_to_str(addr, uuid, str_format); return string(buf, end, uuid, field_width, precision, flags); } #endif |
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/* * Show a '%p' thing. A kernel extension is that the '%p' is followed * by an extra set of alphanumeric characters that are extended format * specifiers. * * Right now we handle: * * - 'M' For a 6-byte MAC address, it prints the address in the * usual colon-separated hex notation * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated * decimal for v4 and colon separated network-order 16 bit hex for v6) * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is * currently the same * * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 * function pointers are really function descriptors, which contain a * pointer to the real address. */ |
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static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags) |
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{ |
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u64 num = (uintptr_t)ptr; |
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/* * Being a boot loader, we explicitly allow pointers to * (physical) address null. */ #if 0 |
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if (!ptr) |
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return string(buf, end, "(null)", field_width, precision, flags); |
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#endif |
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switch (*fmt) { |
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#if defined(CONFIG_EFI_LOADER) && \ !defined(CONFIG_SPL_BUILD) && !defined(API_BUILD) case 'D': return device_path_string(buf, end, ptr, field_width, precision, flags); #endif |
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#ifdef CONFIG_CMD_NET |
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case 'a': flags |= SPECIAL | ZEROPAD; switch (fmt[1]) { case 'p': default: field_width = sizeof(phys_addr_t) * 2 + 2; num = *(phys_addr_t *)ptr; break; } break; |
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case 'm': flags |= SPECIAL; /* Fallthrough */ case 'M': |
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return mac_address_string(buf, end, ptr, field_width, precision, flags); |
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case 'i': flags |= SPECIAL; /* Fallthrough */ case 'I': if (fmt[1] == '6') |
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return ip6_addr_string(buf, end, ptr, field_width, precision, flags); |
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if (fmt[1] == '4') |
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return ip4_addr_string(buf, end, ptr, field_width, precision, flags); |
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flags &= ~SPECIAL; break; |
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#endif |
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#ifdef CONFIG_LIB_UUID case 'U': return uuid_string(buf, end, ptr, field_width, precision, flags, fmt); #endif default: break; } |
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flags |= SMALL; if (field_width == -1) { field_width = 2*sizeof(void *); flags |= ZEROPAD; } |
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return number(buf, end, num, 16, field_width, precision, flags); |
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} |
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static int vsnprintf_internal(char *buf, size_t size, const char *fmt, va_list args) |
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{ |
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u64 num; |
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int base; char *str; |
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int flags; /* flags to number() */ int field_width; /* width of output field */ int precision; /* min. # of digits for integers; max number of chars for from string */ |
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int qualifier; /* 'h', 'l', or 'L' for integer fields */ /* 'z' support added 23/7/1999 S.H. */ /* 'z' changed to 'Z' --davidm 1/25/99 */ /* 't' added for ptrdiff_t */ |
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char *end = buf + size; |
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/* Make sure end is always >= buf - do we want this in U-Boot? */ if (end < buf) { end = ((void *)-1); size = end - buf; } |
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str = buf; |
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for (; *fmt ; ++fmt) { |
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if (*fmt != '%') { |
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ADDCH(str, *fmt); |
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continue; } /* process flags */ flags = 0; |
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repeat: |
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++fmt; /* this also skips first '%' */ switch (*fmt) { |
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case '-': flags |= LEFT; goto repeat; case '+': flags |= PLUS; goto repeat; case ' ': flags |= SPACE; goto repeat; case '#': flags |= SPECIAL; goto repeat; case '0': flags |= ZEROPAD; goto repeat; |
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} |
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/* get field width */ field_width = -1; if (is_digit(*fmt)) field_width = skip_atoi(&fmt); else if (*fmt == '*') { ++fmt; /* it's the next argument */ field_width = va_arg(args, int); if (field_width < 0) { field_width = -field_width; flags |= LEFT; } } /* get the precision */ precision = -1; if (*fmt == '.') { ++fmt; if (is_digit(*fmt)) precision = skip_atoi(&fmt); else if (*fmt == '*') { ++fmt; /* it's the next argument */ precision = va_arg(args, int); } if (precision < 0) precision = 0; } /* get the conversion qualifier */ qualifier = -1; |
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if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || |
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*fmt == 'Z' || *fmt == 'z' || *fmt == 't') { |
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qualifier = *fmt; |
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++fmt; if (qualifier == 'l' && *fmt == 'l') { qualifier = 'L'; |
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++fmt; } |
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} /* default base */ base = 10; switch (*fmt) { case 'c': |
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if (!(flags & LEFT)) { |
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while (--field_width > 0) |
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592 593 594 |
ADDCH(str, ' '); } ADDCH(str, (unsigned char) va_arg(args, int)); |
153d511e3
|
595 |
while (--field_width > 0) |
046a37bd5
|
596 |
ADDCH(str, ' '); |
153d511e3
|
597 598 599 |
continue; case 's': |
274325c50
|
600 601 602 603 604 605 606 |
if (qualifier == 'l' && !IS_ENABLED(CONFIG_SPL_BUILD)) { str = string16(str, end, va_arg(args, u16 *), field_width, precision, flags); } else { str = string(str, end, va_arg(args, char *), field_width, precision, flags); } |
153d511e3
|
607 608 609 |
continue; case 'p': |
8acdae681
|
610 |
str = pointer(fmt + 1, str, end, |
6c6166f52
|
611 612 |
va_arg(args, void *), field_width, precision, flags); |
256060e42
|
613 614 |
if (IS_ERR(str)) return PTR_ERR(str); |
6c6166f52
|
615 616 617 |
/* Skip all alphanumeric pointer suffixes */ while (isalnum(fmt[1])) fmt++; |
153d511e3
|
618 |
continue; |
153d511e3
|
619 620 |
case 'n': if (qualifier == 'l') { |
8acdae681
|
621 |
long *ip = va_arg(args, long *); |
153d511e3
|
622 623 |
*ip = (str - buf); } else { |
8acdae681
|
624 |
int *ip = va_arg(args, int *); |
153d511e3
|
625 626 627 628 629 |
*ip = (str - buf); } continue; case '%': |
046a37bd5
|
630 |
ADDCH(str, '%'); |
153d511e3
|
631 632 633 634 635 636 |
continue; /* integer number formats - set up the flags and "break" */ case 'o': base = 8; break; |
153d511e3
|
637 |
case 'x': |
6c6166f52
|
638 639 |
flags |= SMALL; case 'X': |
153d511e3
|
640 641 642 643 644 645 646 647 648 649 |
base = 16; break; case 'd': case 'i': flags |= SIGN; case 'u': break; default: |
046a37bd5
|
650 |
ADDCH(str, '%'); |
153d511e3
|
651 |
if (*fmt) |
046a37bd5
|
652 |
ADDCH(str, *fmt); |
153d511e3
|
653 654 655 656 |
else --fmt; continue; } |
6c6166f52
|
657 |
if (qualifier == 'L') /* "quad" for 64 bit variables */ |
c40b29568
|
658 |
num = va_arg(args, unsigned long long); |
4b142febf
|
659 |
else if (qualifier == 'l') { |
153d511e3
|
660 |
num = va_arg(args, unsigned long); |
6c6166f52
|
661 662 |
if (flags & SIGN) num = (signed long) num; |
f354b73e1
|
663 664 665 666 667 |
} else if (qualifier == 'Z' || qualifier == 'z') { num = va_arg(args, size_t); } else if (qualifier == 't') { num = va_arg(args, ptrdiff_t); } else if (qualifier == 'h') { |
153d511e3
|
668 669 |
num = (unsigned short) va_arg(args, int); if (flags & SIGN) |
6c6166f52
|
670 671 |
num = (signed short) num; } else { |
153d511e3
|
672 |
num = va_arg(args, unsigned int); |
6c6166f52
|
673 674 675 |
if (flags & SIGN) num = (signed int) num; } |
046a37bd5
|
676 677 678 |
str = number(str, end, num, base, field_width, precision, flags); } |
046a37bd5
|
679 680 681 682 |
if (size > 0) { ADDCH(str, '\0'); if (str > end) end[-1] = '\0'; |
686f60f51
|
683 |
--str; |
153d511e3
|
684 |
} |
046a37bd5
|
685 |
/* the trailing null byte doesn't count towards the total */ |
8acdae681
|
686 |
return str - buf; |
153d511e3
|
687 |
} |
046a37bd5
|
688 689 690 691 692 |
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) { return vsnprintf_internal(buf, size, fmt, args); } |
046a37bd5
|
693 694 695 696 697 698 699 700 701 702 703 704 |
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) { int i; i = vsnprintf(buf, size, fmt, args); if (likely(i < size)) return i; if (size != 0) return size - 1; return 0; } |
046a37bd5
|
705 706 707 708 709 710 711 712 713 714 715 |
int snprintf(char *buf, size_t size, const char *fmt, ...) { va_list args; int i; va_start(args, fmt); i = vsnprintf(buf, size, fmt, args); va_end(args); return i; } |
046a37bd5
|
716 717 718 719 720 721 722 723 724 725 726 |
int scnprintf(char *buf, size_t size, const char *fmt, ...) { va_list args; int i; va_start(args, fmt); i = vscnprintf(buf, size, fmt, args); va_end(args); return i; } |
046a37bd5
|
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 |
/** * Format a string and place it in a buffer (va_list version) * * @param buf The buffer to place the result into * @param fmt The format string to use * @param args Arguments for the format string * * The function returns the number of characters written * into @buf. Use vsnprintf() or vscnprintf() in order to avoid * buffer overflows. * * If you're not already dealing with a va_list consider using sprintf(). */ int vsprintf(char *buf, const char *fmt, va_list args) { return vsnprintf_internal(buf, INT_MAX, fmt, args); } |
8acdae681
|
745 |
int sprintf(char *buf, const char *fmt, ...) |
153d511e3
|
746 747 748 749 750 |
{ va_list args; int i; va_start(args, fmt); |
8acdae681
|
751 |
i = vsprintf(buf, fmt, args); |
153d511e3
|
752 753 754 |
va_end(args); return i; } |
7d9cde103
|
755 756 757 758 759 760 761 762 763 764 765 766 767 768 |
int printf(const char *fmt, ...) { va_list args; uint i; char printbuffer[CONFIG_SYS_PBSIZE]; va_start(args, fmt); /* * For this to work, printbuffer must be larger than * anything we ever want to print. */ i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); va_end(args); |
256060e42
|
769 770 771 |
/* Handle error */ if (i <= 0) return i; |
7d9cde103
|
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 |
/* Print the string */ puts(printbuffer); return i; } int vprintf(const char *fmt, va_list args) { uint i; char printbuffer[CONFIG_SYS_PBSIZE]; /* * For this to work, printbuffer must be larger than * anything we ever want to print. */ i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); |
256060e42
|
787 788 789 |
/* Handle error */ if (i <= 0) return i; |
7d9cde103
|
790 791 792 793 |
/* Print the string */ puts(printbuffer); return i; } |
66312374d
|
794 |
|
21726a7af
|
795 796 797 798 799 800 801 |
void __assert_fail(const char *assertion, const char *file, unsigned line, const char *function) { /* This will not return */ panic("%s:%u: %s: Assertion `%s' failed.", file, line, function, assertion); } |
3cce8a549
|
802 803 804 805 806 807 808 809 810 811 812 813 814 815 |
char *simple_itoa(ulong i) { /* 21 digits plus null terminator, good for 64-bit or smaller ints */ static char local[22]; char *p = &local[21]; *p-- = '\0'; do { *p-- = '0' + i % 10; i /= 10; } while (i > 0); return p + 1; } |
b8bcaa3ad
|
816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 |
/* We don't seem to have %'d in U-Boot */ void print_grouped_ull(unsigned long long int_val, int digits) { char str[21], *s; int grab = 3; digits = (digits + 2) / 3; sprintf(str, "%*llu", digits * 3, int_val); for (s = str; *s; s += grab) { if (s != str) putc(s[-1] != ' ' ? ',' : ' '); printf("%.*s", grab, s); grab = 3; } } |
09c328075
|
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 |
bool str2off(const char *p, loff_t *num) { char *endptr; *num = simple_strtoull(p, &endptr, 16); return *p != '\0' && *endptr == '\0'; } bool str2long(const char *p, ulong *num) { char *endptr; *num = simple_strtoul(p, &endptr, 16); return *p != '\0' && *endptr == '\0'; } |