WebSVN – HelenOS-historic – Diff – /SPARTAN/trunk/src/debug/print.c

 /*
  * Copyright (C) 2001-2004 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include <putchar.h>
 #include <print.h>
 #include <synch/spinlock.h>
 #include <arch/arg.h>
 #include <arch/asm.h>
-#include <arch.h>
+#include <arch/fmath.h>
+#include <arch.h>
 static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */
 static spinlock_t printflock;              /**< printf spinlock */
+#define DEFAULT_DOUBLE_PRECISION 16
+#define DEFAULT_DOUBLE_BUFFER_SIZE 128
+void print_double(double num, __u16 precision)
+{
+    double intval,intval2;
+    int counter;
+    int exponent,exponenttmp;
+    unsigned char buf[DEFAULT_DOUBLE_BUFFER_SIZE];
+    unsigned long in1,in2;
+    /*
+    if (fmath_is_nan(num)) {
+        print_str("NaN");
+        return;
+    }
+    */
+    if (fmath_is_negative(num)) {
+        putchar('-');
+        }
+    num=fmath_abs(num);
+    /*
+    if (fmath_is_infinity(num)) {
+        print_str("Inf");
+        }
+    */
+    //TODO: rounding constant - when we got fraction >= 0.5, we must increment last printed number
+    /* Here is problem with cumulative error while printing big double values -> we will divide
+    the number with a power of 10, print new number with better method for small numbers and then print decimal point at correct position */
+    fmath_fint(fmath_get_decimal_exponent(num),&intval);
+    exponent=(intval>0.0?intval:0);
+    precision+=exponent;
+    if (exponent>0) num = num / ((fmath_dpow(10.0,exponent)));
+    num=fmath_fint(num,&intval);
+    if (precision>0) {
+        counter=precision-1;
+        if (exponent>0) counter++;
+        if (counter>=DEFAULT_DOUBLE_BUFFER_SIZE) {
+            counter=DEFAULT_DOUBLE_BUFFER_SIZE;
+        }
+        exponenttmp=exponent;
+        while(counter>=0) {
+            num *= 10.0;
+            num = fmath_fint(num,&intval2);
+            buf[counter--]=((int)intval2)+'0';
+            exponenttmp--;
+            if ((exponenttmp==0)&&(counter>=0)) buf[counter--]='.';
+        }
+        counter=precision;
+        if ((exponent==0)&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) buf[counter]='.';
+        counter++;
+    } else {
+        counter=0;
+    }
+    if (intval==0.0) {
+        if (counter<DEFAULT_DOUBLE_BUFFER_SIZE) buf[counter++]='0';
+    } else {
+        in1=intval;
+        while(( in1>0 )&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) {
+            in2=in1;
+            in1/=10;
+            buf[counter]=in2-in1*10 + '0';
+            counter++;
+        }
+    }
+    counter = (counter>=DEFAULT_DOUBLE_BUFFER_SIZE?DEFAULT_DOUBLE_BUFFER_SIZE:counter);
+    while (counter>0) {
+        putchar(buf[--counter]);
+    };
+    return;
+}
 /** Print NULL terminated string
+ *
  * Print characters from str using putchar() until
  * \x00 character is reached.
+ *
  * @param str Characters to print.
+ *
  */
 void print_str(const char *str)
+{
     int i = 0;
     char c;
     while (c = str[i++])
         putchar(c);
+}
 /** Print hexadecimal digits
+ *
  * Print fixed count of hexadecimal digits from
  * the number num. The digits are printed in
  * natural left-to-right order starting with
  * the width-th digit.
+ *
  * @param num   Number containing digits.
  * @param width Count of digits to print.
+ *
  */
 void print_fixed_hex(const __u64 num, const int width)
+{
     int i;
     for (i = width*8 - 4; i >= 0; i -= 4)
         putchar(digits[(num>>i) & 0xf]);
+}
 /** Print number in given base
+ *
  * Print significant digits of a number in given
  * base.
+ *
  * @param num  Number to print.
  * @param base Base to print the number in (should
  *             be in range 2 .. 16).
+ *
  */
 void print_number(const __native num, const unsigned int base)
+{
     int val = num;
     char d[sizeof(__native)*8+1];       /* this is good enough even for base == 2 */
     int i = sizeof(__native)*8-1;
     do {
         d[i--] = digits[val % base];
     } while (val /= base);
     d[sizeof(__native)*8] = 0;
     print_str(&d[i + 1]);
+}
 /** General formatted text print
+ *
  * Print text formatted according the fmt parameter
  * and variant arguments. Each formatting directive
  * begins with % (percentage) character and one of the
  * following character:
+ *
  * %    Prints the percentage character.
  * s    The next variant argument is treated as char*
  *      and printed as a NULL terminated string.
  * c    The next variant argument is treated as a single char.
  * p    The next variant argument is treated as a maximum
  *      bit-width integer with respect to architecture
  *      and printed in full hexadecimal width.
  * P    As with 'p', but '0x' is prefixed.
  * q    The next variant argument is treated as a 64b integer
  *      and printed in full hexadecimal width.
  * Q    As with 'q', but '0x' is prefixed.
  * l    The next variant argument is treated as a 32b integer
  *      and printed in full hexadecimal width.
  * L    As with 'l', but '0x' is prefixed.
  * w    The next variant argument is treated as a 16b integer
  *      and printed in full hexadecimal width.
  * W    As with 'w', but '0x' is prefixed.
  * b    The next variant argument is treated as a 8b integer
  *      and printed in full hexadecimal width.
  * N    As with 'b', but '0x' is prefixed.
  * d    The next variant argument is treated as integer
  *      and printed in standard decimal format (only significant
  *      digits).
  * x    The next variant argument is treated as integer
  *      and printed in standard hexadecimal format (only significant
  *      digits).
  * X    As with 'x', but '0x' is prefixed.
+ *
  * All other characters from fmt except the formatting directives
  * are printed in verbatim.
+ *
  * @param fmt Formatting NULL terminated string.
+ *
  */
 void printf(const char *fmt, ...)
+{
     int irqpri, i = 0;
     va_list ap;
     char c;
     va_start(ap, fmt);
     irqpri = cpu_priority_high();
     spinlock_lock(&printflock);
     while (c = fmt[i++]) {
         switch (c) {
             /* control character */
             case '%':
                 switch (c = fmt[i++]) {
                 /* percentile itself */
                 case '%':
                     break;
                 /*
                  * String and character conversions.
                  */
                 case 's':
                     print_str(va_arg(ap, char_ptr));
                     goto loop;
                 case 'c':
                     c = (char) va_arg(ap, int);
                     break;
                 /*
                          * Hexadecimal conversions with fixed width.
                          */
                 case 'P':
                     print_str("0x");
                 case 'p':
                         print_fixed_hex(va_arg(ap, __native), sizeof(__native));
                     goto loop;
                 case 'Q':
                     print_str("0x");
                 case 'q':
                         print_fixed_hex(va_arg(ap, __u64), INT64);
                     goto loop;
                 case 'L':
                     print_str("0x");
                 case 'l':
                         print_fixed_hex(va_arg(ap, __native), INT32);
                     goto loop;
                 case 'W':
                     print_str("0x");
                 case 'w':
                         print_fixed_hex(va_arg(ap, __native), INT16);
                     goto loop;
                 case 'B':
                     print_str("0x");
                 case 'b':
                         print_fixed_hex(va_arg(ap, __native), INT8);
                     goto loop;
                 /*
+                         * Floating point conversions.
+                         */
+                case 'F':
+                case 'f':
+                        print_double(va_arg(ap, double),DEFAULT_DOUBLE_PRECISION);
+                    goto loop;
+                /*
                          * Decimal and hexadecimal conversions.
                          */
                 case 'd':
                         print_number(va_arg(ap, __native), 10);
                     goto loop;
                 case 'X':
                             print_str("0x");
                 case 'x':
                         print_number(va_arg(ap, __native), 16);
                     goto loop;
                 /*
                  * Bad formatting.
                  */
                 default:
                     goto out;
+                }
             default: putchar(c);
+        }
 loop:
+        ;
+    }
 out:
     spinlock_unlock(&printflock);
     cpu_priority_restore(irqpri);
     va_end(ap);
+}

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