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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <func.h>
  30. #include <print.h>
  31. #include <cpu.h>
  32. #include <arch/asm.h>
  33. #include <arch.h>
  34. #include <typedefs.h>
  35.  
  36. __u32   haltstate = 0; /**< Halt flag */
  37.  
  38.  
  39. /** Halt wrapper
  40.  *
  41.  * Set halt flag and halt the cpu.
  42.  *
  43.  */
  44. void halt(void)
  45. {
  46.     haltstate = 1;
  47.     interrupts_disable();
  48.     if (CPU)
  49.         printf("cpu%d: halted\n", CPU->id);
  50.     else
  51.         printf("cpu: halted\n");
  52.     cpu_halt();
  53. }
  54.  
  55. /** Return number of characters in a string.
  56.  *
  57.  * @param str NULL terminated string.
  58.  *
  59.  * @return Number of characters in str.
  60.  */
  61. size_t strlen(const char *str)
  62. {
  63.     int i;
  64.    
  65.     for (i = 0; str[i]; i++)
  66.         ;
  67.    
  68.     return i;
  69. }
  70.  
  71. /** Compare two NULL terminated strings
  72.  *
  73.  * Do a char-by-char comparison of two NULL terminated strings.
  74.  * The strings are considered equal iff they consist of the same
  75.  * characters on the minimum of their lengths and specified maximal
  76.  * length.
  77.  *
  78.  * @param src First string to compare.
  79.  * @param dst Second string to compare.
  80.  * @param len Maximal length for comparison.
  81.  *
  82.  * @return 0 if the strings are equal, 1 otherwise.
  83.  *
  84.  */
  85. int strncmp(const char *src, const char *dst, size_t len)
  86. {
  87.     int i;
  88.    
  89.     i = 0;
  90.     while ((i < len) && (src[i] == dst[i])) {
  91.         if ((i == len - 1) || (src[i] == '\0'))
  92.             return 0;
  93.         i++;
  94.     }
  95.     return 1;
  96. }
  97.  
  98. /** Copy NULL terminated string.
  99.  *
  100.  * Copy at most 'len' characters from string 'src' to 'dest'.
  101.  * If 'src' is shorter than 'len', '\0' is inserted behind the
  102.  * last copied character.
  103.  *
  104.  * @param src Source string.
  105.  * @param dst Destination buffer.
  106.  * @param len Size of destination buffer.
  107.  */
  108. void strncpy(char *dest, const char *src, size_t len)
  109. {
  110.     int i;
  111.     for (i = 0; i < len; i++) {
  112.         if (!(dest[i] = src[i]))
  113.             return;
  114.     }
  115.     dest[i-1] = '\0';
  116. }
  117.  
  118. /** Convert ascii representation to __native
  119.  *
  120.  * Supports 0x for hexa & 0 for octal notation.
  121.  * Does not check for overflows, does not support negative numbers
  122.  *
  123.  * @param text Textual representation of number
  124.  * @return Converted number or 0 if no valid number ofund
  125.  */
  126. __native atoi(const char *text)
  127. {
  128.     int base = 10;
  129.     __native result = 0;
  130.  
  131.     if (text[0] == '0' && text[1] == 'x') {
  132.         base = 16;
  133.         text += 2;
  134.     } else if (text[0] == '0')
  135.         base = 8;
  136.  
  137.     while (*text) {
  138.         result *= base;
  139.         if (base != 16 && *text >= 'A' && *text <= 'F')
  140.             break;
  141.         if (base == 8 && *text >='8')
  142.             break;
  143.  
  144.         if (*text >= '0' && *text <= '9')
  145.             result += *text - '0';
  146.         else if (*text >= 'A' && *text <= 'F')
  147.             result += *text - 'A' + 10;
  148.         else
  149.             break;
  150.         text++;
  151.     }
  152.  
  153.     return result;
  154. }
  155.