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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * Copyright (C) 2006 Josef Cejka
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /**
  31.  * @file    print.c
  32.  * @brief   Printing functions.
  33.  */
  34.  
  35. #include <printf/printf_core.h>
  36. #include <putchar.h>
  37. #include <print.h>
  38. #include <synch/spinlock.h>
  39. #include <arch/arg.h>
  40. #include <arch/asm.h>
  41.  
  42. #include <arch.h>
  43.  
  44. SPINLOCK_INITIALIZE(printflock);            /**< printf spinlock */
  45.  
  46. #define __PRINTF_FLAG_PREFIX        0x00000001  /**< show prefixes 0x or 0*/
  47. #define __PRINTF_FLAG_SIGNED        0x00000002  /**< signed / unsigned number */
  48. #define __PRINTF_FLAG_ZEROPADDED    0x00000004  /**< print leading zeroes */
  49. #define __PRINTF_FLAG_LEFTALIGNED   0x00000010  /**< align to left */
  50. #define __PRINTF_FLAG_SHOWPLUS      0x00000020  /**< always show + sign */
  51. #define __PRINTF_FLAG_SPACESIGN     0x00000040  /**< print space instead of plus */
  52. #define __PRINTF_FLAG_BIGCHARS      0x00000080  /**< show big characters */
  53. #define __PRINTF_FLAG_NEGATIVE      0x00000100  /**< number has - sign */
  54.  
  55. #define PRINT_NUMBER_BUFFER_SIZE    (64+5)      /**< Buffer big enought for 64 bit number
  56.                              * printed in base 2, sign, prefix and
  57.                              * 0 to terminate string.. (last one is only for better testing
  58.                              * end of buffer by zero-filling subroutine)*/
  59.  
  60. /** Enumeration of possible arguments types.
  61.  */
  62. typedef enum {
  63.     PrintfQualifierByte = 0,
  64.     PrintfQualifierShort,
  65.     PrintfQualifierInt,
  66.     PrintfQualifierLong,
  67.     PrintfQualifierLongLong,
  68.     PrintfQualifierNative,
  69.     PrintfQualifierPointer
  70. } qualifier_t;
  71.  
  72. static char digits_small[] = "0123456789abcdef";    /**< Small hexadecimal characters */
  73. static char digits_big[] = "0123456789ABCDEF";  /**< Big hexadecimal characters */
  74.  
  75. /** Checks c for a digit.
  76.  * @param c One character.
  77.  * @return nonzero if c is from interval '0 to '9'.
  78.  */
  79. static inline int isdigit(int c)
  80. {
  81.     return ((c >= '0' )&&( c <= '9'));
  82. }
  83.  
  84. /** Compute length of given zero terminated string.
  85.  * @param str Pointer to valid string.
  86.  * @return string length without trailing zero.
  87.  */
  88. static __native strlen(const char *str)
  89. {
  90.     __native counter = 0;
  91.  
  92.     while (str[counter] != 0) {
  93.         counter++;
  94.     }
  95.  
  96.     return counter;
  97. }
  98.  
  99. /** Print count chars from buffer without adding newline
  100.  * @param buf Buffer with size at least count bytes - NULL pointer NOT allowed!
  101.  * @param count
  102.  * @param ps output method and its data
  103.  * @return 0 on success, EOF on fail
  104.  */
  105. static int printf_putnchars(const char * buf, size_t count, struct printf_spec *ps)
  106. {
  107.     if (ps->write((void *)buf, count, ps->data) == count) {
  108.         return 0;
  109.     }
  110.    
  111.     return EOF;
  112. }
  113.  
  114. /** Print string without added newline
  115.  * @param str string to print
  116.  * @param ps write function specification and support data
  117.  * @return 0 on success or EOF on fail
  118.  */
  119. static int printf_putstr(const char * str, struct printf_spec *ps)
  120. {
  121.     size_t count;
  122.    
  123.     if (str == NULL) {
  124.         return printf_putnchars("(NULL)", 6, ps);
  125.     }
  126.  
  127.     count = strlen(str);
  128.  
  129.     if (ps->write((void *) str, count, ps->data) == count) {
  130.         return 0;
  131.     }
  132.    
  133.     return EOF;
  134. }
  135.  
  136. /** Print one character to output
  137.  * @param c one character
  138.  * @param ps output method
  139.  * @return printed character or EOF
  140.  */
  141. static int printf_putchar(int c, struct printf_spec *ps)
  142. {
  143.     unsigned char ch = c;
  144.    
  145.     if (ps->write((void *) &ch, 1, ps->data) == 1) {
  146.         return c;
  147.     }
  148.    
  149.     return EOF;
  150. }
  151.  
  152. /** Print one formatted character
  153.  * @param c character to print
  154.  * @param width
  155.  * @param flags
  156.  * @return number of printed characters or EOF
  157.  */
  158. static int print_char(char c, int width, __u64 flags, struct printf_spec *ps)
  159. {
  160.     int counter = 0;
  161.    
  162.     if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
  163.         while (--width > 0) {   /* one space is consumed by character itself hence predecrement */
  164.             /* FIXME: painful slow */
  165.             printf_putchar(' ', ps);   
  166.             ++counter;
  167.         }
  168.     }
  169.    
  170.     if (printf_putchar(c, ps) == EOF) {
  171.         return EOF;
  172.     }
  173.  
  174.     while (--width > 0) { /* one space is consumed by character itself hence predecrement */
  175.         printf_putchar(' ', ps);
  176.         ++counter;
  177.     }
  178.    
  179.     return ++counter;
  180. }
  181.  
  182. /** Print one string
  183.  * @param s string
  184.  * @param width
  185.  * @param precision
  186.  * @param flags
  187.  * @return number of printed characters or EOF
  188.  */
  189.                        
  190. static int print_string(char *s, int width, int precision, __u64 flags, struct printf_spec *ps)
  191. {
  192.     int counter = 0;
  193.     size_t size;
  194.  
  195.     if (s == NULL) {
  196.         return printf_putstr("(NULL)", ps);
  197.     }
  198.    
  199.     size = strlen(s);
  200.  
  201.     /* print leading spaces */
  202.  
  203.     if (precision == 0)
  204.         precision = size;
  205.  
  206.     width -= precision;
  207.    
  208.     if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
  209.         while (width-- > 0) {  
  210.             printf_putchar(' ', ps);   
  211.             counter++;
  212.         }
  213.     }
  214.  
  215.     while (precision > size) {
  216.         precision--;
  217.         printf_putchar(' ', ps);   
  218.         ++counter;
  219.     }
  220.    
  221.     if (printf_putnchars(s, precision, ps) == EOF) {
  222.         return EOF;
  223.     }
  224.  
  225.     counter += precision;
  226.  
  227.     while (width-- > 0) {
  228.         printf_putchar(' ', ps);   
  229.         ++counter;
  230.     }
  231.    
  232.     return ++counter;
  233. }
  234.  
  235.  
  236. /** Print number in given base
  237.  *
  238.  * Print significant digits of a number in given
  239.  * base.
  240.  *
  241.  * @param num  Number to print.
  242.  * @param width
  243.  * @param precision
  244.  * @param base Base to print the number in (should
  245.  *             be in range 2 .. 16).
  246.  * @param flags output modifiers
  247.  * @return number of written characters or EOF
  248.  *
  249.  */
  250. static int print_number(__u64 num, int width, int precision, int base , __u64 flags, struct printf_spec *ps)
  251. {
  252.     char *digits = digits_small;
  253.     char d[PRINT_NUMBER_BUFFER_SIZE];   /* this is good enough even for base == 2, prefix and sign */
  254.     char *ptr = &d[PRINT_NUMBER_BUFFER_SIZE - 1];
  255.     int size = 0; /* size of number with all prefixes and signs */
  256.     int number_size; /* size of plain number */
  257.     int written = 0;
  258.     char sgn;
  259.    
  260.     if (flags & __PRINTF_FLAG_BIGCHARS)
  261.         digits = digits_big;   
  262.    
  263.     *ptr-- = 0; /* Put zero at end of string */
  264.  
  265.     if (num == 0) {
  266.         *ptr-- = '0';
  267.         size++;
  268.     } else {
  269.         do {
  270.             *ptr-- = digits[num % base];
  271.             size++;
  272.         } while (num /= base);
  273.     }
  274.    
  275.     number_size = size;
  276.  
  277.     /* Collect sum of all prefixes/signs/... to calculate padding and leading zeroes */
  278.     if (flags & __PRINTF_FLAG_PREFIX) {
  279.         switch(base) {
  280.             case 2: /* Binary formating is not standard, but usefull */
  281.                 size += 2;
  282.                 break;
  283.             case 8:
  284.                 size++;
  285.                 break;
  286.             case 16:
  287.                 size += 2;
  288.                 break;
  289.         }
  290.     }
  291.  
  292.     sgn = 0;
  293.     if (flags & __PRINTF_FLAG_SIGNED) {
  294.         if (flags & __PRINTF_FLAG_NEGATIVE) {
  295.             sgn = '-';
  296.             size++;
  297.         } else if (flags & __PRINTF_FLAG_SHOWPLUS) {
  298.                 sgn = '+';
  299.                 size++;
  300.             } else if (flags & __PRINTF_FLAG_SPACESIGN) {
  301.                     sgn = ' ';
  302.                     size++;
  303.                 }
  304.     }
  305.  
  306.     if (flags & __PRINTF_FLAG_LEFTALIGNED) {
  307.         flags &= ~__PRINTF_FLAG_ZEROPADDED;
  308.     }
  309.  
  310.     /* if number is leftaligned or precision is specified then zeropadding is ignored */
  311.     if (flags & __PRINTF_FLAG_ZEROPADDED) {
  312.         if ((precision == 0) && (width > size)) {
  313.             precision = width - size + number_size;
  314.         }
  315.     }
  316.  
  317.     /* print leading spaces */
  318.     if (number_size > precision) /* We must print whole number not only a part */
  319.         precision = number_size;
  320.  
  321.     width -= precision + size - number_size;
  322.    
  323.     if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
  324.         while (width-- > 0) {  
  325.             printf_putchar(' ', ps);   
  326.             written++;
  327.         }
  328.     }
  329.    
  330.     /* print sign */
  331.     if (sgn) {
  332.         printf_putchar(sgn, ps);
  333.         written++;
  334.     }
  335.    
  336.     /* print prefix */
  337.    
  338.     if (flags & __PRINTF_FLAG_PREFIX) {
  339.         switch(base) {
  340.             case 2: /* Binary formating is not standard, but usefull */
  341.                 printf_putchar('0', ps);
  342.                 if (flags & __PRINTF_FLAG_BIGCHARS) {
  343.                     printf_putchar('B', ps);
  344.                 } else {
  345.                     printf_putchar('b', ps);
  346.                 }
  347.                 written += 2;
  348.                 break;
  349.             case 8:
  350.                 printf_putchar('o', ps);
  351.                 written++;
  352.                 break;
  353.             case 16:
  354.                 printf_putchar('0', ps);
  355.                 if (flags & __PRINTF_FLAG_BIGCHARS) {
  356.                     printf_putchar('X', ps);
  357.                 } else {
  358.                     printf_putchar('x', ps);
  359.                 }
  360.                 written += 2;
  361.                 break;
  362.         }
  363.     }
  364.  
  365.     /* print leading zeroes */
  366.     precision -= number_size;
  367.     while (precision-- > 0) {  
  368.         printf_putchar('0', ps);   
  369.         written++;
  370.     }
  371.  
  372.    
  373.     /* print number itself */
  374.  
  375.     written += printf_putstr(++ptr, ps);
  376.    
  377.     /* print ending spaces */
  378.    
  379.     while (width-- > 0) {  
  380.         printf_putchar(' ', ps);   
  381.         written++;
  382.     }
  383.  
  384.     return written;
  385. }
  386.  
  387.  
  388. /** Print formatted string.
  389.  *
  390.  * Print string formatted according to the fmt parameter
  391.  * and variadic arguments. Each formatting directive
  392.  * must have the following form:
  393.  *
  394.  *  \% [ FLAGS ] [ WIDTH ] [ .PRECISION ] [ TYPE ] CONVERSION
  395.  *
  396.  * FLAGS:@n
  397.  *  - "#" Force to print prefix.
  398.  *  For conversion \%o the prefix is 0, for %x and \%X prefixes are 0x and 0X
  399.  *  and for conversion \%b the prefix is 0b.
  400.  *
  401.  *  - "-"   Align to left.
  402.  *
  403.  *  - "+"   Print positive sign just as negative.
  404.  *
  405.  *  - " "   If the printed number is positive and "+" flag is not set, print space in
  406.  *  place of sign.
  407.  *
  408.  *  - "0"   Print 0 as padding instead of spaces. Zeroes are placed between sign and the
  409.  *  rest of the number. This flag is ignored if "-" flag is specified.
  410.  *
  411.  * WIDTH:@n
  412.  *  - Specify minimal width of printed argument. If it is bigger, width is ignored.
  413.  * If width is specified with a "*" character instead of number, width is taken from
  414.  * parameter list. And integer parameter is expected before parameter for processed
  415.  * conversion specification. If this value is negative its absolute value is taken
  416.  * and the "-" flag is set.
  417.  *
  418.  * PRECISION:@n
  419.  *  - Value precision. For numbers it specifies minimum valid numbers.
  420.  * Smaller numbers are printed with leading zeroes. Bigger numbers are not affected.
  421.  * Strings with more than precision characters are cut off.
  422.  * Just as with width, an "*" can be used used instead of a number.
  423.  * An integer value is then expected in parameters. When both width and precision
  424.  * are specified using "*", the first parameter is used for width and the second one
  425.  * for precision.
  426.  *
  427.  * TYPE:@n
  428.  *  - "hh"  Signed or unsigned char.@n
  429.  *  - "h"   Signed or usigned short.@n
  430.  *  - ""    Signed or usigned int (default value).@n
  431.  *  - "l"   Signed or usigned long int.@n
  432.  *  - "ll"  Signed or usigned long long int.@n
  433.  *  - "z"   __native (non-standard extension).@n
  434.  *
  435.  *
  436.  * CONVERSION:@n
  437.  *  - % Print percentile character itself.
  438.  *
  439.  *  - c Print single character.
  440.  *
  441.  *  - s Print zero terminated string. If a NULL value is passed as value, "(NULL)" is printed instead.
  442.  *
  443.  *  - P, p  Print value of a pointer. Void * value is expected and it is printed in hexadecimal notation with prefix
  444.  *  (as with \%#X or \%#x for 32bit or \%#X / \%#x for 64bit long pointers).
  445.  *
  446.  *  - b Print value as unsigned binary number. Prefix is not printed by default. (Nonstandard extension.)
  447.  *
  448.  *  - o Print value as unsigned octal number. Prefix is not printed by default.
  449.  *
  450.  *  - d,i   Print signed decimal number. There is no difference between d and i conversion.
  451.  *
  452.  *  - u Print unsigned decimal number.
  453.  *
  454.  *  - X, x  Print hexadecimal number with upper- or lower-case. Prefix is not printed by default.
  455.  *
  456.  * All other characters from fmt except the formatting directives
  457.  * are printed in verbatim.
  458.  *
  459.  * @param fmt Formatting NULL terminated string.
  460.  * @return Number of printed characters or negative value on failure.
  461.  */
  462. int printf_core(const char *fmt, struct printf_spec *ps, va_list ap)
  463. {
  464.     int irqpri;
  465.     int i = 0, j = 0; /**< i is index of currently processed char from fmt, j is index to the first not printed nonformating character */
  466.     int end;
  467.     int counter; /**< counter of printed characters */
  468.     int retval; /**< used to store return values from called functions */
  469.     char c;
  470.     qualifier_t qualifier;  /* type of argument */
  471.     int base;   /**< base in which will be parameter (numbers only) printed */
  472.     __u64 number; /**< argument value */
  473.     size_t  size; /**< byte size of integer parameter */
  474.     int width, precision;
  475.     __u64 flags;
  476.    
  477.     counter = 0;
  478.    
  479.     irqpri = interrupts_disable();
  480.     spinlock_lock(&printflock);
  481.  
  482.     while ((c = fmt[i])) {
  483.         /* control character */
  484.         if (c == '%' ) {
  485.             /* print common characters if any processed */ 
  486.             if (i > j) {
  487.                 if ((retval = printf_putnchars(&fmt[j], (size_t)(i - j), ps)) == EOF) { /* error */
  488.                     counter = -counter;
  489.                     goto out;
  490.                 }
  491.                 counter += retval;
  492.             }
  493.        
  494.             j = i;
  495.             /* parse modifiers */
  496.             flags = 0;
  497.             end = 0;
  498.            
  499.             do {
  500.                 ++i;
  501.                 switch (c = fmt[i]) {
  502.                     case '#': flags |= __PRINTF_FLAG_PREFIX; break;
  503.                     case '-': flags |= __PRINTF_FLAG_LEFTALIGNED; break;
  504.                     case '+': flags |= __PRINTF_FLAG_SHOWPLUS; break;
  505.                     case ' ': flags |= __PRINTF_FLAG_SPACESIGN; break;
  506.                     case '0': flags |= __PRINTF_FLAG_ZEROPADDED; break;
  507.                     default: end = 1;
  508.                 }; 
  509.                
  510.             } while (end == 0);
  511.            
  512.             /* width & '*' operator */
  513.             width = 0;
  514.             if (isdigit(fmt[i])) {
  515.                 while (isdigit(fmt[i])) {
  516.                     width *= 10;
  517.                     width += fmt[i++] - '0';
  518.                 }
  519.             } else if (fmt[i] == '*') {
  520.                 /* get width value from argument list*/
  521.                 i++;
  522.                 width = (int)va_arg(ap, int);
  523.                 if (width < 0) {
  524.                     /* negative width means to set '-' flag */
  525.                     width *= -1;
  526.                     flags |= __PRINTF_FLAG_LEFTALIGNED;
  527.                 }
  528.             }
  529.            
  530.             /* precision and '*' operator */   
  531.             precision = 0;
  532.             if (fmt[i] == '.') {
  533.                 ++i;
  534.                 if (isdigit(fmt[i])) {
  535.                     while (isdigit(fmt[i])) {
  536.                         precision *= 10;
  537.                         precision += fmt[i++] - '0';
  538.                     }
  539.                 } else if (fmt[i] == '*') {
  540.                     /* get precision value from argument list*/
  541.                     i++;
  542.                     precision = (int)va_arg(ap, int);
  543.                     if (precision < 0) {
  544.                         /* negative precision means to ignore it */
  545.                         precision = 0;
  546.                     }
  547.                 }
  548.             }
  549.  
  550.             switch (fmt[i++]) {
  551.                 /** TODO: unimplemented qualifiers:
  552.                  * t ptrdiff_t - ISO C 99
  553.                  */
  554.                 case 'h':   /* char or short */
  555.                     qualifier = PrintfQualifierShort;
  556.                     if (fmt[i] == 'h') {
  557.                         i++;
  558.                         qualifier = PrintfQualifierByte;
  559.                     }
  560.                     break;
  561.                 case 'l':   /* long or long long*/
  562.                     qualifier = PrintfQualifierLong;
  563.                     if (fmt[i] == 'l') {
  564.                         i++;
  565.                         qualifier = PrintfQualifierLongLong;
  566.                     }
  567.                     break;
  568.                 case 'z':   /* __native */
  569.                     qualifier = PrintfQualifierNative;
  570.                     break;
  571.                 default:
  572.                     qualifier = PrintfQualifierInt; /* default type */
  573.                     --i;
  574.             }  
  575.            
  576.             base = 10;
  577.  
  578.             switch (c = fmt[i]) {
  579.  
  580.                 /*
  581.                 * String and character conversions.
  582.                 */
  583.                 case 's':
  584.                     if ((retval = print_string(va_arg(ap, char*), width, precision, flags, ps)) == EOF) {
  585.                         counter = -counter;
  586.                         goto out;
  587.                     };
  588.                    
  589.                     counter += retval;
  590.                     j = i + 1;
  591.                     goto next_char;
  592.                 case 'c':
  593.                     c = va_arg(ap, unsigned int);
  594.                     if ((retval = print_char(c, width, flags, ps)) == EOF) {
  595.                         counter = -counter;
  596.                         goto out;
  597.                     };
  598.                    
  599.                     counter += retval;
  600.                     j = i + 1;
  601.                     goto next_char;
  602.  
  603.                 /*
  604.                  * Integer values
  605.                 */
  606.                 case 'P': /* pointer */
  607.                         flags |= __PRINTF_FLAG_BIGCHARS;
  608.                 case 'p':
  609.                     flags |= __PRINTF_FLAG_PREFIX;
  610.                     base = 16;
  611.                     qualifier = PrintfQualifierPointer;
  612.                     break; 
  613.                 case 'b':
  614.                     base = 2;
  615.                     break;
  616.                 case 'o':
  617.                     base = 8;
  618.                     break;
  619.                 case 'd':
  620.                 case 'i':
  621.                     flags |= __PRINTF_FLAG_SIGNED;  
  622.                 case 'u':
  623.                     break;
  624.                 case 'X':
  625.                     flags |= __PRINTF_FLAG_BIGCHARS;
  626.                 case 'x':
  627.                     base = 16;
  628.                     break;
  629.                 /* percentile itself */
  630.                 case '%':
  631.                     j = i;
  632.                     goto next_char;
  633.                 /*
  634.                 * Bad formatting.
  635.                 */
  636.                 default:
  637.                     /* Unknown format
  638.                      *  now, the j is index of '%' so we will
  639.                      * print whole bad format sequence
  640.                      */
  641.                     goto next_char;    
  642.             }
  643.        
  644.        
  645.         /* Print integers */
  646.             /* print number */
  647.             switch (qualifier) {
  648.                 case PrintfQualifierByte:
  649.                     size = sizeof(unsigned char);
  650.                     number = (__u64)va_arg(ap, unsigned int);
  651.                     break;
  652.                 case PrintfQualifierShort:
  653.                     size = sizeof(unsigned short);
  654.                     number = (__u64)va_arg(ap, unsigned int);
  655.                     break;
  656.                 case PrintfQualifierInt:
  657.                     size = sizeof(unsigned int);
  658.                     number = (__u64)va_arg(ap, unsigned int);
  659.                     break;
  660.                 case PrintfQualifierLong:
  661.                     size = sizeof(unsigned long);
  662.                     number = (__u64)va_arg(ap, unsigned long);
  663.                     break;
  664.                 case PrintfQualifierLongLong:
  665.                     size = sizeof(unsigned long long);
  666.                     number = (__u64)va_arg(ap, unsigned long long);
  667.                     break;
  668.                 case PrintfQualifierPointer:
  669.                     size = sizeof(void *);
  670.                     number = (__u64)(unsigned long)va_arg(ap, void *);
  671.                     break;
  672.                 case PrintfQualifierNative:
  673.                     size = sizeof(__native);
  674.                     number = (__u64)va_arg(ap, __native);
  675.                     break;
  676.                 default: /* Unknown qualifier */
  677.                     counter = -counter;
  678.                     goto out;
  679.             }
  680.            
  681.             if (flags & __PRINTF_FLAG_SIGNED) {
  682.                 if (number & (0x1 << (size*8 - 1))) {
  683.                     flags |= __PRINTF_FLAG_NEGATIVE;
  684.                
  685.                     if (size == sizeof(__u64)) {
  686.                         number = -((__s64)number);
  687.                     } else {
  688.                         number = ~number;
  689.                         number &= (~((0xFFFFFFFFFFFFFFFFll) <<  (size * 8)));
  690.                         number++;
  691.                     }
  692.                 }
  693.             }
  694.  
  695.             if ((retval = print_number(number, width, precision, base, flags, ps)) == EOF ) {
  696.                 counter = -counter;
  697.                 goto out;
  698.             };
  699.  
  700.             counter += retval;
  701.             j = i + 1;
  702.         }  
  703. next_char:
  704.            
  705.         ++i;
  706.     }
  707.    
  708.     if (i > j) {
  709.         if ((retval = printf_putnchars(&fmt[j], (__native)(i - j), ps)) == EOF) { /* error */
  710.             counter = -counter;
  711.             goto out;
  712.            
  713.         }
  714.         counter += retval;
  715.     }
  716.  
  717. out:
  718.     spinlock_unlock(&printflock);
  719.     interrupts_restore(irqpri);
  720.    
  721.     return counter;
  722. }
  723.  
  724.