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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. /** @addtogroup libc
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  * @brief   Printing functions.
  36.  */
  37.  
  38. #include <unistd.h>
  39. #include <stdio.h>
  40. #include <io/printf_core.h>
  41. #include <ctype.h>
  42. #include <string.h>
  43.  
  44. #define __PRINTF_FLAG_PREFIX        0x00000001  /**< show prefixes 0x or 0*/
  45. #define __PRINTF_FLAG_SIGNED        0x00000002  /**< signed / unsigned number */
  46. #define __PRINTF_FLAG_ZEROPADDED    0x00000004  /**< print leading zeroes */
  47. #define __PRINTF_FLAG_LEFTALIGNED   0x00000010  /**< align to left */
  48. #define __PRINTF_FLAG_SHOWPLUS      0x00000020  /**< always show + sign */
  49. #define __PRINTF_FLAG_SPACESIGN     0x00000040  /**< print space instead of plus */
  50. #define __PRINTF_FLAG_BIGCHARS      0x00000080  /**< show big characters */
  51. #define __PRINTF_FLAG_NEGATIVE      0x00000100  /**< number has - sign */
  52.  
  53. #define PRINT_NUMBER_BUFFER_SIZE    (64+5)      /**< Buffer big enought for 64 bit number
  54.                              * printed in base 2, sign, prefix and
  55.                              * 0 to terminate string.. (last one is only for better testing
  56.                              * end of buffer by zero-filling subroutine)
  57.                              */
  58. /** Enumeration of possible arguments types.
  59.  */
  60. typedef enum {
  61.     PrintfQualifierByte = 0,
  62.     PrintfQualifierShort,
  63.     PrintfQualifierInt,
  64.     PrintfQualifierLong,
  65.     PrintfQualifierLongLong,
  66.     PrintfQualifierSizeT,
  67.     PrintfQualifierPointer
  68. } qualifier_t;
  69.  
  70. static char digits_small[] = "0123456789abcdef";    /**< Small hexadecimal characters */
  71. static char digits_big[] = "0123456789ABCDEF";      /**< Big hexadecimal characters */
  72.  
  73. /** Print count chars from buffer without adding newline
  74.  * @param buf Buffer with size at least count bytes - NULL pointer NOT allowed!
  75.  * @param count
  76.  * @param ps output method and its data
  77.  * @return number of printed characters
  78.  */
  79. static int printf_putnchars(const char * buf, size_t count, struct printf_spec *ps)
  80. {
  81.     return ps->write((void *)buf, count, ps->data);
  82. }
  83.  
  84. /** Print string without added newline
  85.  * @param str string to print
  86.  * @param ps write function specification and support data
  87.  * @return number of printed characters
  88.  */
  89. static int printf_putstr(const char * str, struct printf_spec *ps)
  90. {
  91.     size_t count;
  92.    
  93.     if (str == NULL)
  94.         return printf_putnchars("(NULL)", 6, ps);
  95.  
  96.     for (count = 0; str[count] != 0; count++);
  97.  
  98.     if (ps->write((void *) str, count, ps->data) == count)
  99.         return 0;
  100.    
  101.     return EOF;
  102. }
  103.  
  104. /** Print one character to output
  105.  * @param c one character
  106.  * @param ps output method
  107.  * @return number of printed characters
  108.  */
  109. static int printf_putchar(int c, struct printf_spec *ps)
  110. {
  111.     unsigned char ch = c;
  112.    
  113.     return ps->write((void *) &ch, 1, ps->data);
  114. }
  115.  
  116. /** Print one formatted character
  117.  * @param c character to print
  118.  * @param width
  119.  * @param flags
  120.  * @return number of printed characters
  121.  */
  122. static int print_char(char c, int width, uint64_t flags, struct printf_spec *ps)
  123. {
  124.     int counter = 0;
  125.    
  126.     if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
  127.         while (--width > 0) {   /* one space is consumed by character itself hence predecrement */
  128.             if (printf_putchar(' ', ps) > 0)   
  129.                 ++counter;
  130.         }
  131.     }
  132.    
  133.     if (printf_putchar(c, ps) > 0)
  134.         counter++;
  135.    
  136.     while (--width > 0) { /* one space is consumed by character itself hence predecrement */
  137.         if (printf_putchar(' ', ps) > 0)
  138.             ++counter;
  139.     }
  140.    
  141.     return ++counter;
  142. }
  143.  
  144. /** Print one string
  145.  * @param s string
  146.  * @param width
  147.  * @param precision
  148.  * @param flags
  149.  * @return number of printed characters
  150.  */
  151.                        
  152. static int print_string(char *s, int width, int precision, uint64_t flags, struct printf_spec *ps)
  153. {
  154.     int counter = 0;
  155.     size_t size;
  156.     int retval;
  157.  
  158.     if (s == NULL) {
  159.         return printf_putstr("(NULL)", ps);
  160.     }
  161.    
  162.     size = strlen(s);
  163.  
  164.     /* print leading spaces */
  165.  
  166.     if (precision == 0)
  167.         precision = size;
  168.  
  169.     width -= precision;
  170.    
  171.     if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
  172.         while (width-- > 0) {  
  173.             if (printf_putchar(' ', ps) == 1)  
  174.                 counter++;
  175.         }
  176.     }
  177.  
  178.     while (precision > size) {
  179.         precision--;
  180.         if (printf_putchar(' ', ps) == 1)  
  181.             ++counter;
  182.     }
  183.    
  184.     if ((retval = printf_putnchars(s, precision, ps)) < 0) {
  185.         return -counter;
  186.     }
  187.  
  188.     counter += retval; 
  189.  
  190.     while (width-- > 0) {
  191.         if (printf_putchar(' ', ps) == 1)  
  192.             ++counter;
  193.     }
  194.    
  195.     return counter;
  196. }
  197.  
  198.  
  199. /** Print number in given base
  200.  *
  201.  * Print significant digits of a number in given
  202.  * base.
  203.  *
  204.  * @param num  Number to print.
  205.  * @param width
  206.  * @param precision
  207.  * @param base Base to print the number in (should
  208.  *             be in range 2 .. 16).
  209.  * @param flags output modifiers
  210.  * @return number of printed characters
  211.  *
  212.  */
  213. static int print_number(uint64_t num, int width, int precision, int base , uint64_t flags, struct printf_spec *ps)
  214. {
  215.     char *digits = digits_small;
  216.     char d[PRINT_NUMBER_BUFFER_SIZE];   /* this is good enough even for base == 2, prefix and sign */
  217.     char *ptr = &d[PRINT_NUMBER_BUFFER_SIZE - 1];
  218.     int size = 0; /* size of number with all prefixes and signs */
  219.     int number_size; /* size of plain number */
  220.     char sgn;
  221.     int retval;
  222.     int counter = 0;
  223.    
  224.     if (flags & __PRINTF_FLAG_BIGCHARS)
  225.         digits = digits_big;   
  226.    
  227.     *ptr-- = 0; /* Put zero at end of string */
  228.  
  229.     if (num == 0) {
  230.         *ptr-- = '0';
  231.         size++;
  232.     } else {
  233.         do {
  234.             *ptr-- = digits[num % base];
  235.             size++;
  236.         } while (num /= base);
  237.     }
  238.    
  239.     number_size = size;
  240.  
  241.     /* Collect sum of all prefixes/signs/... to calculate padding and leading zeroes */
  242.     if (flags & __PRINTF_FLAG_PREFIX) {
  243.         switch(base) {
  244.         case 2: /* Binary formating is not standard, but usefull */
  245.             size += 2;
  246.             break;
  247.         case 8:
  248.             size++;
  249.             break;
  250.         case 16:
  251.             size += 2;
  252.             break;
  253.         }
  254.     }
  255.  
  256.     sgn = 0;
  257.     if (flags & __PRINTF_FLAG_SIGNED) {
  258.         if (flags & __PRINTF_FLAG_NEGATIVE) {
  259.             sgn = '-';
  260.             size++;
  261.         } else if (flags & __PRINTF_FLAG_SHOWPLUS) {
  262.                 sgn = '+';
  263.                 size++;
  264.             } else if (flags & __PRINTF_FLAG_SPACESIGN) {
  265.                     sgn = ' ';
  266.                     size++;
  267.                 }
  268.     }
  269.  
  270.     if (flags & __PRINTF_FLAG_LEFTALIGNED) {
  271.         flags &= ~__PRINTF_FLAG_ZEROPADDED;
  272.     }
  273.  
  274.     /* if number is leftaligned or precision is specified then zeropadding is ignored */
  275.     if (flags & __PRINTF_FLAG_ZEROPADDED) {
  276.         if ((precision == 0) && (width > size)) {
  277.             precision = width - size + number_size;
  278.         }
  279.     }
  280.  
  281.     /* print leading spaces */
  282.     if (number_size > precision) /* We must print whole number not only a part */
  283.         precision = number_size;
  284.  
  285.     width -= precision + size - number_size;
  286.    
  287.     if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
  288.         while (width-- > 0) {  
  289.             if (printf_putchar(' ', ps) == 1)  
  290.                 counter++;
  291.         }
  292.     }
  293.    
  294.     /* print sign */
  295.     if (sgn) {
  296.         if (printf_putchar(sgn, ps) == 1)
  297.             counter++;
  298.     }
  299.    
  300.     /* print prefix */
  301.    
  302.     if (flags & __PRINTF_FLAG_PREFIX) {
  303.         switch(base) {
  304.         case 2: /* Binary formating is not standard, but usefull */
  305.             if (printf_putchar('0', ps) == 1)
  306.                 counter++;
  307.             if (flags & __PRINTF_FLAG_BIGCHARS) {
  308.                 if (printf_putchar('B', ps) == 1)
  309.                     counter++;
  310.             } else {
  311.                 if (printf_putchar('b', ps) == 1)
  312.                     counter++;
  313.             }
  314.             break;
  315.         case 8:
  316.             if (printf_putchar('o', ps) == 1)
  317.                 counter++;
  318.             break;
  319.         case 16:
  320.             if (printf_putchar('0', ps) == 1)
  321.                 counter++;
  322.             if (flags & __PRINTF_FLAG_BIGCHARS) {
  323.                 if (printf_putchar('X', ps) == 1)
  324.                     counter++;
  325.             } else {
  326.                 if (printf_putchar('x', ps) == 1)
  327.                     counter++;
  328.             }
  329.             break;
  330.         }
  331.     }
  332.  
  333.     /* print leading zeroes */
  334.     precision -= number_size;
  335.     while (precision-- > 0) {  
  336.         if (printf_putchar('0', ps) == 1)
  337.             counter++;
  338.     }
  339.  
  340.    
  341.     /* print number itself */
  342.  
  343.     if ((retval = printf_putstr(++ptr, ps)) > 0) {
  344.         counter += retval;
  345.     }
  346.    
  347.     /* print ending spaces */
  348.    
  349.     while (width-- > 0) {  
  350.         if (printf_putchar(' ', ps) == 1)  
  351.             counter++;
  352.     }
  353.  
  354.     return counter;
  355. }
  356.  
  357.  
  358. /** Print formatted string.
  359.  *
  360.  * Print string formatted according to the fmt parameter
  361.  * and variadic arguments. Each formatting directive
  362.  * must have the following form:
  363.  *
  364.  *  \% [ FLAGS ] [ WIDTH ] [ .PRECISION ] [ TYPE ] CONVERSION
  365.  *
  366.  * FLAGS:@n
  367.  *  - "#" Force to print prefix.
  368.  *  For conversion \%o the prefix is 0, for %x and \%X prefixes are 0x and 0X
  369.  *  and for conversion \%b the prefix is 0b.
  370.  *
  371.  *  - "-"   Align to left.
  372.  *
  373.  *  - "+"   Print positive sign just as negative.
  374.  *
  375.  *  - " "   If the printed number is positive and "+" flag is not set, print space in
  376.  *  place of sign.
  377.  *
  378.  *  - "0"   Print 0 as padding instead of spaces. Zeroes are placed between sign and the
  379.  *  rest of the number. This flag is ignored if "-" flag is specified.
  380.  *
  381.  * WIDTH:@n
  382.  *  - Specify minimal width of printed argument. If it is bigger, width is ignored.
  383.  * If width is specified with a "*" character instead of number, width is taken from
  384.  * parameter list. And integer parameter is expected before parameter for processed
  385.  * conversion specification. If this value is negative its absolute value is taken
  386.  * and the "-" flag is set.
  387.  *
  388.  * PRECISION:@n
  389.  *  - Value precision. For numbers it specifies minimum valid numbers.
  390.  * Smaller numbers are printed with leading zeroes. Bigger numbers are not affected.
  391.  * Strings with more than precision characters are cut off.
  392.  * Just as with width, an "*" can be used used instead of a number.
  393.  * An integer value is then expected in parameters. When both width and precision
  394.  * are specified using "*", the first parameter is used for width and the second one
  395.  * for precision.
  396.  *
  397.  * TYPE:@n
  398.  *  - "hh"  Signed or unsigned char.@n
  399.  *  - "h"   Signed or usigned short.@n
  400.  *  - ""    Signed or usigned int (default value).@n
  401.  *  - "l"   Signed or usigned long int.@n
  402.  *  - "ll"  Signed or usigned long long int.@n
  403.  *  - "z"   Type size_t.@n
  404.  *
  405.  *
  406.  * CONVERSION:@n
  407.  *  - % Print percentile character itself.
  408.  *
  409.  *  - c Print single character.
  410.  *
  411.  *  - s Print zero terminated string. If a NULL value is passed as value, "(NULL)" is printed instead.
  412.  *
  413.  *  - P, p  Print value of a pointer. Void * value is expected and it is printed in hexadecimal notation with prefix
  414.  *  (as with '\%#X' or '\%#x' for 32bit or '\%#X' or '\%#x' for 64bit long pointers).
  415.  *
  416.  *  - b Print value as unsigned binary number. Prefix is not printed by default. (Nonstandard extension.)
  417.  *
  418.  *  - o Print value as unsigned octal number. Prefix is not printed by default.
  419.  *
  420.  *  - d,i   Print signed decimal number. There is no difference between d and i conversion.
  421.  *
  422.  *  - u Print unsigned decimal number.
  423.  *
  424.  *  - X, x  Print hexadecimal number with upper- or lower-case. Prefix is not printed by default.
  425.  *
  426.  * All other characters from fmt except the formatting directives
  427.  * are printed in verbatim.
  428.  *
  429.  * @param fmt Formatting NULL terminated string.
  430.  * @return Number of printed characters or negative value on failure.
  431.  */
  432. int printf_core(const char *fmt, struct printf_spec *ps, va_list ap)
  433. {
  434.     int i = 0, j = 0; /* i is index of currently processed char from fmt, j is index to the first not printed nonformating character */
  435.     int end;
  436.     int counter; /* counter of printed characters */
  437.     int retval; /* used to store return values from called functions */
  438.     char c;
  439.     qualifier_t qualifier;  /* type of argument */
  440.     int base;   /* base in which will be parameter (numbers only) printed */
  441.     uint64_t number; /* argument value */
  442.     size_t  size; /* byte size of integer parameter */
  443.     int width, precision;
  444.     uint64_t flags;
  445.    
  446.     counter = 0;
  447.    
  448.     while ((c = fmt[i])) {
  449.         /* control character */
  450.         if (c == '%' ) {
  451.             /* print common characters if any processed */ 
  452.             if (i > j) {
  453.                 if ((retval = printf_putnchars(&fmt[j], (size_t)(i - j), ps)) < 0) { /* error */
  454.                     goto minus_out;
  455.                 }
  456.                 counter += retval;
  457.             }
  458.        
  459.             j = i;
  460.             /* parse modifiers */
  461.             flags = 0;
  462.             end = 0;
  463.            
  464.             do {
  465.                 ++i;
  466.                 switch (c = fmt[i]) {
  467.                 case '#': flags |= __PRINTF_FLAG_PREFIX; break;
  468.                 case '-': flags |= __PRINTF_FLAG_LEFTALIGNED; break;
  469.                 case '+': flags |= __PRINTF_FLAG_SHOWPLUS; break;
  470.                 case ' ': flags |= __PRINTF_FLAG_SPACESIGN; break;
  471.                 case '0': flags |= __PRINTF_FLAG_ZEROPADDED; break;
  472.                 default: end = 1;
  473.                 }; 
  474.                
  475.             } while (end == 0);
  476.            
  477.             /* width & '*' operator */
  478.             width = 0;
  479.             if (isdigit(fmt[i])) {
  480.                 while (isdigit(fmt[i])) {
  481.                     width *= 10;
  482.                     width += fmt[i++] - '0';
  483.                 }
  484.             } else if (fmt[i] == '*') {
  485.                 /* get width value from argument list*/
  486.                 i++;
  487.                 width = (int)va_arg(ap, int);
  488.                 if (width < 0) {
  489.                     /* negative width means to set '-' flag */
  490.                     width *= -1;
  491.                     flags |= __PRINTF_FLAG_LEFTALIGNED;
  492.                 }
  493.             }
  494.            
  495.             /* precision and '*' operator */   
  496.             precision = 0;
  497.             if (fmt[i] == '.') {
  498.                 ++i;
  499.                 if (isdigit(fmt[i])) {
  500.                     while (isdigit(fmt[i])) {
  501.                         precision *= 10;
  502.                         precision += fmt[i++] - '0';
  503.                     }
  504.                 } else if (fmt[i] == '*') {
  505.                     /* get precision value from argument list*/
  506.                     i++;
  507.                     precision = (int)va_arg(ap, int);
  508.                     if (precision < 0) {
  509.                         /* negative precision means to ignore it */
  510.                         precision = 0;
  511.                     }
  512.                 }
  513.             }
  514.  
  515.             switch (fmt[i++]) {
  516.             /** TODO: unimplemented qualifiers:
  517.              * t ptrdiff_t - ISO C 99
  518.              */
  519.             case 'h':   /* char or short */
  520.                 qualifier = PrintfQualifierShort;
  521.                 if (fmt[i] == 'h') {
  522.                     i++;
  523.                     qualifier = PrintfQualifierByte;
  524.                 }
  525.                 break;
  526.             case 'l':   /* long or long long*/
  527.                 qualifier = PrintfQualifierLong;
  528.                 if (fmt[i] == 'l') {
  529.                     i++;
  530.                     qualifier = PrintfQualifierLongLong;
  531.                 }
  532.                 break;
  533.             case 'z':   /* size_t */
  534.                 qualifier = PrintfQualifierSizeT;
  535.                 break;
  536.             default:
  537.                 qualifier = PrintfQualifierInt; /* default type */
  538.                 --i;
  539.             }  
  540.            
  541.             base = 10;
  542.  
  543.             switch (c = fmt[i]) {
  544.  
  545.                 /*
  546.                 * String and character conversions.
  547.                 */
  548.             case 's':
  549.                 if ((retval = print_string(va_arg(ap, char*), width, precision, flags, ps)) < 0) {
  550.                     goto minus_out;
  551.                 }
  552.                    
  553.                 counter += retval;
  554.                 j = i + 1;
  555.                 goto next_char;
  556.             case 'c':
  557.                 c = va_arg(ap, unsigned int);
  558.                 if ((retval = print_char(c, width, flags, ps)) < 0) {
  559.                     goto minus_out;
  560.                 }
  561.  
  562.                 counter += retval;
  563.                 j = i + 1;
  564.                 goto next_char;
  565.  
  566.             /*
  567.              * Integer values
  568.             */
  569.             case 'P': /* pointer */
  570.                     flags |= __PRINTF_FLAG_BIGCHARS;
  571.             case 'p':
  572.                 flags |= __PRINTF_FLAG_PREFIX;
  573.                 base = 16;
  574.                 qualifier = PrintfQualifierPointer;
  575.                 break; 
  576.             case 'b':
  577.                 base = 2;
  578.                 break;
  579.             case 'o':
  580.                 base = 8;
  581.                 break;
  582.             case 'd':
  583.             case 'i':
  584.                 flags |= __PRINTF_FLAG_SIGNED;  
  585.             case 'u':
  586.                 break;
  587.             case 'X':
  588.                 flags |= __PRINTF_FLAG_BIGCHARS;
  589.             case 'x':
  590.                 base = 16;
  591.                 break;
  592.             /* percentile itself */
  593.             case '%':
  594.                 j = i;
  595.                 goto next_char;
  596.             /*
  597.             * Bad formatting.
  598.             */
  599.             default:
  600.                 /* Unknown format
  601.                  *  now, the j is index of '%' so we will
  602.                  * print whole bad format sequence
  603.                  */
  604.                 goto next_char;    
  605.             }
  606.        
  607.        
  608.         /* Print integers */
  609.             /* print number */
  610.             switch (qualifier) {
  611.             case PrintfQualifierByte:
  612.                 size = sizeof(unsigned char);
  613.                 number = (uint64_t)va_arg(ap, unsigned int);
  614.                 break;
  615.             case PrintfQualifierShort:
  616.                 size = sizeof(unsigned short);
  617.                 number = (uint64_t)va_arg(ap, unsigned int);
  618.                 break;
  619.             case PrintfQualifierInt:
  620.                 size = sizeof(unsigned int);
  621.                 number = (uint64_t)va_arg(ap, unsigned int);
  622.                 break;
  623.             case PrintfQualifierLong:
  624.                 size = sizeof(unsigned long);
  625.                 number = (uint64_t)va_arg(ap, unsigned long);
  626.                 break;
  627.             case PrintfQualifierLongLong:
  628.                 size = sizeof(unsigned long long);
  629.                 number = (uint64_t)va_arg(ap, unsigned long long);
  630.                 break;
  631.             case PrintfQualifierPointer:
  632.                 size = sizeof(void *);
  633.                 number = (uint64_t)(unsigned long)va_arg(ap, void *);
  634.                 break;
  635.             case PrintfQualifierSizeT:
  636.                 size = sizeof(size_t);
  637.                 number = (uint64_t)va_arg(ap, size_t);
  638.                 break;
  639.             default: /* Unknown qualifier */
  640.                 goto minus_out;
  641.                    
  642.             }
  643.            
  644.             if (flags & __PRINTF_FLAG_SIGNED) {
  645.                 if (number & (0x1 << (size*8 - 1))) {
  646.                     flags |= __PRINTF_FLAG_NEGATIVE;
  647.                
  648.                     if (size == sizeof(uint64_t)) {
  649.                         number = -((int64_t)number);
  650.                     } else {
  651.                         number = ~number;
  652.                         number &= (~((0xFFFFFFFFFFFFFFFFll) <<  (size * 8)));
  653.                         number++;
  654.                     }
  655.                 }
  656.             }
  657.  
  658.             if ((retval = print_number(number, width, precision, base, flags, ps)) < 0 ) {
  659.                 goto minus_out;
  660.             };
  661.  
  662.             counter += retval;
  663.             j = i + 1;
  664.         }  
  665. next_char:
  666.            
  667.         ++i;
  668.     }
  669.    
  670.     if (i > j) {
  671.         if ((retval = printf_putnchars(&fmt[j], (size_t)(i - j), ps)) < 0) { /* error */
  672.             goto minus_out;
  673.         }
  674.         counter += retval;
  675.     }
  676.    
  677.     return counter;
  678. minus_out:
  679.     return -counter;
  680. }
  681.  
  682. /** @}
  683.  */
  684.