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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2013-07-27 22:07:53 +0000
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2013-07-27 22:07:53 +0000
commit4fbe7358c7747a9165f776eb19addbb9baf7def2 (patch)
treebc7076b4f6d10c2cc2942539bb666e50f0b66954 /libdde_linux26/contrib/lib/vsprintf.c
parent21adb5284111190057db245cfc2b54091920c373 (diff)
rename libdde_linux26 into libdde-linux26 to make dpkg-source happy
Diffstat (limited to 'libdde_linux26/contrib/lib/vsprintf.c')
-rw-r--r--libdde_linux26/contrib/lib/vsprintf.c1305
1 files changed, 0 insertions, 1305 deletions
diff --git a/libdde_linux26/contrib/lib/vsprintf.c b/libdde_linux26/contrib/lib/vsprintf.c
deleted file mode 100644
index 0fbd0121..00000000
--- a/libdde_linux26/contrib/lib/vsprintf.c
+++ /dev/null
@@ -1,1305 +0,0 @@
-/*
- * linux/lib/vsprintf.c
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- */
-
-/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
-/*
- * Wirzenius wrote this portably, Torvalds fucked it up :-)
- */
-
-/*
- * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
- * - changed to provide snprintf and vsnprintf functions
- * So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
- * - scnprintf and vscnprintf
- */
-
-#include <stdarg.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/ctype.h>
-#include <linux/kernel.h>
-#include <linux/kallsyms.h>
-#include <linux/uaccess.h>
-#include <linux/ioport.h>
-
-#include <asm/page.h> /* for PAGE_SIZE */
-#include <asm/div64.h>
-#include <asm/sections.h> /* for dereference_function_descriptor() */
-
-/* Works only for digits and letters, but small and fast */
-#define TOLOWER(x) ((x) | 0x20)
-
-static unsigned int simple_guess_base(const char *cp)
-{
- if (cp[0] == '0') {
- if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
- return 16;
- else
- return 8;
- } else {
- return 10;
- }
-}
-
-/**
- * simple_strtoul - convert a string to an unsigned long
- * @cp: The start of the string
- * @endp: A pointer to the end of the parsed string will be placed here
- * @base: The number base to use
- */
-unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
-{
- unsigned long result = 0;
-
- if (!base)
- base = simple_guess_base(cp);
-
- if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
-
- while (isxdigit(*cp)) {
- unsigned int value;
-
- value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
- if (value >= base)
- break;
- result = result * base + value;
- cp++;
- }
-
- if (endp)
- *endp = (char *)cp;
- return result;
-}
-EXPORT_SYMBOL(simple_strtoul);
-
-/**
- * simple_strtol - convert a string to a signed long
- * @cp: The start of the string
- * @endp: A pointer to the end of the parsed string will be placed here
- * @base: The number base to use
- */
-long simple_strtol(const char *cp, char **endp, unsigned int base)
-{
- if(*cp == '-')
- return -simple_strtoul(cp + 1, endp, base);
- return simple_strtoul(cp, endp, base);
-}
-EXPORT_SYMBOL(simple_strtol);
-
-/**
- * simple_strtoull - convert a string to an unsigned long long
- * @cp: The start of the string
- * @endp: A pointer to the end of the parsed string will be placed here
- * @base: The number base to use
- */
-unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
-{
- unsigned long long result = 0;
-
- if (!base)
- base = simple_guess_base(cp);
-
- if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
-
- while (isxdigit(*cp)) {
- unsigned int value;
-
- value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
- if (value >= base)
- break;
- result = result * base + value;
- cp++;
- }
-
- if (endp)
- *endp = (char *)cp;
- return result;
-}
-EXPORT_SYMBOL(simple_strtoull);
-
-/**
- * simple_strtoll - convert a string to a signed long long
- * @cp: The start of the string
- * @endp: A pointer to the end of the parsed string will be placed here
- * @base: The number base to use
- */
-long long simple_strtoll(const char *cp, char **endp, unsigned int base)
-{
- if(*cp=='-')
- return -simple_strtoull(cp + 1, endp, base);
- return simple_strtoull(cp, endp, base);
-}
-
-/**
- * strict_strtoul - convert a string to an unsigned long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoul converts a string to an unsigned long only if the
- * string is really an unsigned long string, any string containing
- * any invalid char at the tail will be rejected and -EINVAL is returned,
- * only a newline char at the tail is acceptible because people generally
- * change a module parameter in the following way:
- *
- * echo 1024 > /sys/module/e1000/parameters/copybreak
- *
- * echo will append a newline to the tail.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- *
- * simple_strtoul just ignores the successive invalid characters and
- * return the converted value of prefix part of the string.
- */
-int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
-{
- char *tail;
- unsigned long val;
- size_t len;
-
- *res = 0;
- len = strlen(cp);
- if (len == 0)
- return -EINVAL;
-
- val = simple_strtoul(cp, &tail, base);
- if (tail == cp)
- return -EINVAL;
- if ((*tail == '\0') ||
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
- *res = val;
- return 0;
- }
-
- return -EINVAL;
-}
-EXPORT_SYMBOL(strict_strtoul);
-
-/**
- * strict_strtol - convert a string to a long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtol is similiar to strict_strtoul, but it allows the first
- * character of a string is '-'.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- */
-int strict_strtol(const char *cp, unsigned int base, long *res)
-{
- int ret;
- if (*cp == '-') {
- ret = strict_strtoul(cp + 1, base, (unsigned long *)res);
- if (!ret)
- *res = -(*res);
- } else {
- ret = strict_strtoul(cp, base, (unsigned long *)res);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(strict_strtol);
-
-/**
- * strict_strtoull - convert a string to an unsigned long long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoull converts a string to an unsigned long long only if the
- * string is really an unsigned long long string, any string containing
- * any invalid char at the tail will be rejected and -EINVAL is returned,
- * only a newline char at the tail is acceptible because people generally
- * change a module parameter in the following way:
- *
- * echo 1024 > /sys/module/e1000/parameters/copybreak
- *
- * echo will append a newline to the tail of the string.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- *
- * simple_strtoull just ignores the successive invalid characters and
- * return the converted value of prefix part of the string.
- */
-int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res)
-{
- char *tail;
- unsigned long long val;
- size_t len;
-
- *res = 0;
- len = strlen(cp);
- if (len == 0)
- return -EINVAL;
-
- val = simple_strtoull(cp, &tail, base);
- if (tail == cp)
- return -EINVAL;
- if ((*tail == '\0') ||
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
- *res = val;
- return 0;
- }
-
- return -EINVAL;
-}
-EXPORT_SYMBOL(strict_strtoull);
-
-/**
- * strict_strtoll - convert a string to a long long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoll is similiar to strict_strtoull, but it allows the first
- * character of a string is '-'.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- */
-int strict_strtoll(const char *cp, unsigned int base, long long *res)
-{
- int ret;
- if (*cp == '-') {
- ret = strict_strtoull(cp + 1, base, (unsigned long long *)res);
- if (!ret)
- *res = -(*res);
- } else {
- ret = strict_strtoull(cp, base, (unsigned long long *)res);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(strict_strtoll);
-
-static int skip_atoi(const char **s)
-{
- int i=0;
-
- while (isdigit(**s))
- i = i*10 + *((*s)++) - '0';
- return i;
-}
-
-/* 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. */
-static char* put_dec_trunc(char *buf, unsigned q)
-{
- 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)
- *buf++ = q + '0'; /* most sign. digit */
- }
- }
- }
- return buf;
-}
-/* Same with if's removed. Always emits five digits */
-static char* put_dec_full(char *buf, unsigned q)
-{
- /* 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);
-
- /* 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)
-
- 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 */
-static noinline char* put_dec(char *buf, unsigned long long num)
-{
- while (1) {
- unsigned rem;
- if (num < 100000)
- return put_dec_trunc(buf, num);
- rem = do_div(num, 100000);
- buf = put_dec_full(buf, rem);
- }
-}
-
-#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 */
-#define SMALL 32 /* Must be 32 == 0x20 */
-#define SPECIAL 64 /* 0x */
-
-static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type)
-{
- /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
- static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
-
- char tmp[66];
- char sign;
- char locase;
- int need_pfx = ((type & SPECIAL) && base != 10);
- int i;
-
- /* locase = 0 or 0x20. ORing digits or letters with 'locase'
- * produces same digits or (maybe lowercased) letters */
- locase = (type & SMALL);
- if (type & LEFT)
- type &= ~ZEROPAD;
- sign = 0;
- if (type & SIGN) {
- if ((signed long long) num < 0) {
- sign = '-';
- num = - (signed long long) num;
- size--;
- } else if (type & PLUS) {
- sign = '+';
- size--;
- } else if (type & SPACE) {
- sign = ' ';
- size--;
- }
- }
- if (need_pfx) {
- size--;
- if (base == 16)
- size--;
- }
-
- /* generate full string in tmp[], in reverse order */
- i = 0;
- if (num == 0)
- 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;
- if (base == 16) shift = 4;
- do {
- tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
- num >>= shift;
- } while (num);
- } else { /* base 10 */
- i = put_dec(tmp, num) - tmp;
- }
-
- /* printing 100 using %2d gives "100", not "00" */
- if (i > precision)
- precision = i;
- /* leading space padding */
- size -= precision;
- if (!(type & (ZEROPAD+LEFT))) {
- while(--size >= 0) {
- if (buf < end)
- *buf = ' ';
- ++buf;
- }
- }
- /* sign */
- if (sign) {
- if (buf < end)
- *buf = sign;
- ++buf;
- }
- /* "0x" / "0" prefix */
- if (need_pfx) {
- if (buf < end)
- *buf = '0';
- ++buf;
- if (base == 16) {
- if (buf < end)
- *buf = ('X' | locase);
- ++buf;
- }
- }
- /* zero or space padding */
- if (!(type & LEFT)) {
- char c = (type & ZEROPAD) ? '0' : ' ';
- while (--size >= 0) {
- if (buf < end)
- *buf = c;
- ++buf;
- }
- }
- /* hmm even more zero padding? */
- while (i <= --precision) {
- if (buf < end)
- *buf = '0';
- ++buf;
- }
- /* actual digits of result */
- while (--i >= 0) {
- if (buf < end)
- *buf = tmp[i];
- ++buf;
- }
- /* trailing space padding */
- while (--size >= 0) {
- if (buf < end)
- *buf = ' ';
- ++buf;
- }
- return buf;
-}
-
-static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags)
-{
- int len, i;
-
- if ((unsigned long)s < PAGE_SIZE)
- s = "<NULL>";
-
- len = strnlen(s, precision);
-
- if (!(flags & LEFT)) {
- while (len < field_width--) {
- if (buf < end)
- *buf = ' ';
- ++buf;
- }
- }
- for (i = 0; i < len; ++i) {
- if (buf < end)
- *buf = *s;
- ++buf; ++s;
- }
- while (len < field_width--) {
- if (buf < end)
- *buf = ' ';
- ++buf;
- }
- return buf;
-}
-
-static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags)
-{
- unsigned long value = (unsigned long) ptr;
-#ifdef CONFIG_KALLSYMS
- char sym[KSYM_SYMBOL_LEN];
- sprint_symbol(sym, value);
- return string(buf, end, sym, field_width, precision, flags);
-#else
- field_width = 2*sizeof(void *);
- flags |= SPECIAL | SMALL | ZEROPAD;
- return number(buf, end, value, 16, field_width, precision, flags);
-#endif
-}
-
-static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
-{
-#ifndef IO_RSRC_PRINTK_SIZE
-#define IO_RSRC_PRINTK_SIZE 4
-#endif
-
-#ifndef MEM_RSRC_PRINTK_SIZE
-#define MEM_RSRC_PRINTK_SIZE 8
-#endif
-
- /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
- char sym[4*sizeof(resource_size_t) + 8];
- char *p = sym, *pend = sym + sizeof(sym);
- int size = -1;
-
- if (res->flags & IORESOURCE_IO)
- size = IO_RSRC_PRINTK_SIZE;
- else if (res->flags & IORESOURCE_MEM)
- size = MEM_RSRC_PRINTK_SIZE;
-
- *p++ = '[';
- p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
- *p++ = '-';
- p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
- *p++ = ']';
- *p = 0;
-
- return string(buf, end, sym, field_width, precision, flags);
-}
-
-static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
-{
- char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
- 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';
-
- return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL);
-}
-
-static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
-{
- char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
- 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';
-
- return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL);
-}
-
-static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
-{
- char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
- 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';
-
- return string(buf, end, ip4_addr, field_width, precision, flags & ~SPECIAL);
-}
-
-/*
- * 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:
- *
- * - 'F' For symbolic function descriptor pointers
- * - 'S' For symbolic direct pointers
- * - 'R' For a struct resource pointer, it prints the range of
- * addresses (not the name nor the flags)
- * - '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.
- */
-static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
-{
- if (!ptr)
- return string(buf, end, "(null)", field_width, precision, flags);
-
- switch (*fmt) {
- case 'F':
- ptr = dereference_function_descriptor(ptr);
- /* Fallthrough */
- case 'S':
- return symbol_string(buf, end, ptr, field_width, precision, flags);
- case 'R':
- return resource_string(buf, end, ptr, field_width, precision, flags);
- case 'm':
- flags |= SPECIAL;
- /* Fallthrough */
- case 'M':
- return mac_address_string(buf, end, ptr, field_width, precision, flags);
- case 'i':
- flags |= SPECIAL;
- /* Fallthrough */
- case 'I':
- if (fmt[1] == '6')
- return ip6_addr_string(buf, end, ptr, field_width, precision, flags);
- if (fmt[1] == '4')
- return ip4_addr_string(buf, end, ptr, field_width, precision, flags);
- flags &= ~SPECIAL;
- break;
- }
- flags |= SMALL;
- if (field_width == -1) {
- field_width = 2*sizeof(void *);
- flags |= ZEROPAD;
- }
- return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags);
-}
-
-/**
- * vsnprintf - Format a string and place it in a buffer
- * @buf: The buffer to place the result into
- * @size: The size of the buffer, including the trailing null space
- * @fmt: The format string to use
- * @args: Arguments for the format string
- *
- * This function follows C99 vsnprintf, but has some extensions:
- * %pS output the name of a text symbol
- * %pF output the name of a function pointer
- * %pR output the address range in a struct resource
- *
- * The return value is the number of characters which would
- * be generated for the given input, excluding the trailing
- * '\0', as per ISO C99. If you want to have the exact
- * number of characters written into @buf as return value
- * (not including the trailing '\0'), use vscnprintf(). If the
- * return is greater than or equal to @size, the resulting
- * string is truncated.
- *
- * Call this function if you are already dealing with a va_list.
- * You probably want snprintf() instead.
- */
-int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
-{
- unsigned long long num;
- int base;
- char *str, *end, c;
-
- 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 */
- 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 */
-
- /* Reject out-of-range values early. Large positive sizes are
- used for unknown buffer sizes. */
- if (unlikely((int) size < 0)) {
- /* There can be only one.. */
- static char warn = 1;
- WARN_ON(warn);
- warn = 0;
- return 0;
- }
-
- str = buf;
- end = buf + size;
-
- /* Make sure end is always >= buf */
- if (end < buf) {
- end = ((void *)-1);
- size = end - buf;
- }
-
- for (; *fmt ; ++fmt) {
- if (*fmt != '%') {
- if (str < end)
- *str = *fmt;
- ++str;
- continue;
- }
-
- /* process flags */
- flags = 0;
- repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- 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;
- }
-
- /* get field width */
- field_width = -1;
- if (isdigit(*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 (isdigit(*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;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- }
- }
-
- /* default base */
- base = 10;
-
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT)) {
- while (--field_width > 0) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- }
- c = (unsigned char) va_arg(args, int);
- if (str < end)
- *str = c;
- ++str;
- while (--field_width > 0) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- continue;
-
- case 's':
- str = string(str, end, va_arg(args, char *), field_width, precision, flags);
- continue;
-
- case 'p':
- str = pointer(fmt+1, str, end,
- va_arg(args, void *),
- field_width, precision, flags);
- /* Skip all alphanumeric pointer suffixes */
- while (isalnum(fmt[1]))
- fmt++;
- continue;
-
- case 'n':
- /* FIXME:
- * What does C99 say about the overflow case here? */
- if (qualifier == 'l') {
- long * ip = va_arg(args, long *);
- *ip = (str - buf);
- } else if (qualifier == 'Z' || qualifier == 'z') {
- size_t * ip = va_arg(args, size_t *);
- *ip = (str - buf);
- } else {
- int * ip = va_arg(args, int *);
- *ip = (str - buf);
- }
- continue;
-
- case '%':
- if (str < end)
- *str = '%';
- ++str;
- continue;
-
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
-
- case 'x':
- flags |= SMALL;
- case 'X':
- base = 16;
- break;
-
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
-
- default:
- if (str < end)
- *str = '%';
- ++str;
- if (*fmt) {
- if (str < end)
- *str = *fmt;
- ++str;
- } else {
- --fmt;
- }
- continue;
- }
- if (qualifier == 'L')
- num = va_arg(args, long long);
- else if (qualifier == 'l') {
- num = va_arg(args, unsigned long);
- if (flags & SIGN)
- num = (signed long) num;
- } 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') {
- num = (unsigned short) va_arg(args, int);
- if (flags & SIGN)
- num = (signed short) num;
- } else {
- num = va_arg(args, unsigned int);
- if (flags & SIGN)
- num = (signed int) num;
- }
- str = number(str, end, num, base,
- field_width, precision, flags);
- }
- if (size > 0) {
- if (str < end)
- *str = '\0';
- else
- end[-1] = '\0';
- }
- /* the trailing null byte doesn't count towards the total */
- return str-buf;
-}
-EXPORT_SYMBOL(vsnprintf);
-
-/**
- * vscnprintf - Format a string and place it in a buffer
- * @buf: The buffer to place the result into
- * @size: The size of the buffer, including the trailing null space
- * @fmt: The format string to use
- * @args: Arguments for the format string
- *
- * The return value is the number of characters which have been written into
- * the @buf not including the trailing '\0'. If @size is <= 0 the function
- * returns 0.
- *
- * Call this function if you are already dealing with a va_list.
- * You probably want scnprintf() instead.
- *
- * See the vsnprintf() documentation for format string extensions over C99.
- */
-int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
-{
- int i;
-
- i=vsnprintf(buf,size,fmt,args);
- return (i >= size) ? (size - 1) : i;
-}
-EXPORT_SYMBOL(vscnprintf);
-
-/**
- * snprintf - Format a string and place it in a buffer
- * @buf: The buffer to place the result into
- * @size: The size of the buffer, including the trailing null space
- * @fmt: The format string to use
- * @...: Arguments for the format string
- *
- * The return value is the number of characters which would be
- * generated for the given input, excluding the trailing null,
- * as per ISO C99. If the return is greater than or equal to
- * @size, the resulting string is truncated.
- *
- * See the vsnprintf() documentation for format string extensions over C99.
- */
-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;
-}
-EXPORT_SYMBOL(snprintf);
-
-/**
- * scnprintf - Format a string and place it in a buffer
- * @buf: The buffer to place the result into
- * @size: The size of the buffer, including the trailing null space
- * @fmt: The format string to use
- * @...: Arguments for the format string
- *
- * The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is <= 0 the function returns 0.
- */
-
-int scnprintf(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 >= size) ? (size - 1) : i;
-}
-EXPORT_SYMBOL(scnprintf);
-
-/**
- * vsprintf - Format a string and place it in a buffer
- * @buf: The buffer to place the result into
- * @fmt: The format string to use
- * @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.
- *
- * Call this function if you are already dealing with a va_list.
- * You probably want sprintf() instead.
- *
- * See the vsnprintf() documentation for format string extensions over C99.
- */
-int vsprintf(char *buf, const char *fmt, va_list args)
-{
- return vsnprintf(buf, INT_MAX, fmt, args);
-}
-EXPORT_SYMBOL(vsprintf);
-
-/**
- * sprintf - Format a string and place it in a buffer
- * @buf: The buffer to place the result into
- * @fmt: The format string to use
- * @...: Arguments for the format string
- *
- * The function returns the number of characters written
- * into @buf. Use snprintf() or scnprintf() in order to avoid
- * buffer overflows.
- *
- * See the vsnprintf() documentation for format string extensions over C99.
- */
-int sprintf(char * buf, const char *fmt, ...)
-{
- va_list args;
- int i;
-
- va_start(args, fmt);
- i=vsnprintf(buf, INT_MAX, fmt, args);
- va_end(args);
- return i;
-}
-EXPORT_SYMBOL(sprintf);
-
-/**
- * vsscanf - Unformat a buffer into a list of arguments
- * @buf: input buffer
- * @fmt: format of buffer
- * @args: arguments
- */
-int vsscanf(const char * buf, const char * fmt, va_list args)
-{
- const char *str = buf;
- char *next;
- char digit;
- int num = 0;
- int qualifier;
- int base;
- int field_width;
- int is_sign = 0;
-
- while(*fmt && *str) {
- /* skip any white space in format */
- /* white space in format matchs any amount of
- * white space, including none, in the input.
- */
- if (isspace(*fmt)) {
- while (isspace(*fmt))
- ++fmt;
- while (isspace(*str))
- ++str;
- }
-
- /* anything that is not a conversion must match exactly */
- if (*fmt != '%' && *fmt) {
- if (*fmt++ != *str++)
- break;
- continue;
- }
-
- if (!*fmt)
- break;
- ++fmt;
-
- /* skip this conversion.
- * advance both strings to next white space
- */
- if (*fmt == '*') {
- while (!isspace(*fmt) && *fmt)
- fmt++;
- while (!isspace(*str) && *str)
- str++;
- continue;
- }
-
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atoi(&fmt);
-
- /* get conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt == 'Z' || *fmt == 'z') {
- qualifier = *fmt++;
- if (unlikely(qualifier == *fmt)) {
- if (qualifier == 'h') {
- qualifier = 'H';
- fmt++;
- } else if (qualifier == 'l') {
- qualifier = 'L';
- fmt++;
- }
- }
- }
- base = 10;
- is_sign = 0;
-
- if (!*fmt || !*str)
- break;
-
- switch(*fmt++) {
- case 'c':
- {
- char *s = (char *) va_arg(args,char*);
- if (field_width == -1)
- field_width = 1;
- do {
- *s++ = *str++;
- } while (--field_width > 0 && *str);
- num++;
- }
- continue;
- case 's':
- {
- char *s = (char *) va_arg(args, char *);
- if(field_width == -1)
- field_width = INT_MAX;
- /* first, skip leading white space in buffer */
- while (isspace(*str))
- str++;
-
- /* now copy until next white space */
- while (*str && !isspace(*str) && field_width--) {
- *s++ = *str++;
- }
- *s = '\0';
- num++;
- }
- continue;
- case 'n':
- /* return number of characters read so far */
- {
- int *i = (int *)va_arg(args,int*);
- *i = str - buf;
- }
- continue;
- case 'o':
- base = 8;
- break;
- case 'x':
- case 'X':
- base = 16;
- break;
- case 'i':
- base = 0;
- case 'd':
- is_sign = 1;
- case 'u':
- break;
- case '%':
- /* looking for '%' in str */
- if (*str++ != '%')
- return num;
- continue;
- default:
- /* invalid format; stop here */
- return num;
- }
-
- /* have some sort of integer conversion.
- * first, skip white space in buffer.
- */
- while (isspace(*str))
- str++;
-
- digit = *str;
- if (is_sign && digit == '-')
- digit = *(str + 1);
-
- if (!digit
- || (base == 16 && !isxdigit(digit))
- || (base == 10 && !isdigit(digit))
- || (base == 8 && (!isdigit(digit) || digit > '7'))
- || (base == 0 && !isdigit(digit)))
- break;
-
- switch(qualifier) {
- case 'H': /* that's 'hh' in format */
- if (is_sign) {
- signed char *s = (signed char *) va_arg(args,signed char *);
- *s = (signed char) simple_strtol(str,&next,base);
- } else {
- unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
- *s = (unsigned char) simple_strtoul(str, &next, base);
- }
- break;
- case 'h':
- if (is_sign) {
- short *s = (short *) va_arg(args,short *);
- *s = (short) simple_strtol(str,&next,base);
- } else {
- unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
- *s = (unsigned short) simple_strtoul(str, &next, base);
- }
- break;
- case 'l':
- if (is_sign) {
- long *l = (long *) va_arg(args,long *);
- *l = simple_strtol(str,&next,base);
- } else {
- unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
- *l = simple_strtoul(str,&next,base);
- }
- break;
- case 'L':
- if (is_sign) {
- long long *l = (long long*) va_arg(args,long long *);
- *l = simple_strtoll(str,&next,base);
- } else {
- unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
- *l = simple_strtoull(str,&next,base);
- }
- break;
- case 'Z':
- case 'z':
- {
- size_t *s = (size_t*) va_arg(args,size_t*);
- *s = (size_t) simple_strtoul(str,&next,base);
- }
- break;
- default:
- if (is_sign) {
- int *i = (int *) va_arg(args, int*);
- *i = (int) simple_strtol(str,&next,base);
- } else {
- unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
- *i = (unsigned int) simple_strtoul(str,&next,base);
- }
- break;
- }
- num++;
-
- if (!next)
- break;
- str = next;
- }
-
- /*
- * Now we've come all the way through so either the input string or the
- * format ended. In the former case, there can be a %n at the current
- * position in the format that needs to be filled.
- */
- if (*fmt == '%' && *(fmt + 1) == 'n') {
- int *p = (int *)va_arg(args, int *);
- *p = str - buf;
- }
-
- return num;
-}
-EXPORT_SYMBOL(vsscanf);
-
-/**
- * sscanf - Unformat a buffer into a list of arguments
- * @buf: input buffer
- * @fmt: formatting of buffer
- * @...: resulting arguments
- */
-int sscanf(const char * buf, const char * fmt, ...)
-{
- va_list args;
- int i;
-
- va_start(args,fmt);
- i = vsscanf(buf,fmt,args);
- va_end(args);
- return i;
-}
-EXPORT_SYMBOL(sscanf);