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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 if first is smaller, 1 if second smaller.
  83.  *
  84.  */
  85. int strncmp(const char *src, const char *dst, size_t len)
  86. {
  87.     int i;
  88.    
  89.     i = 0;
  90.     for (;*src && *dst && i < len;src++,dst++,i++) {
  91.         if (*src < *dst)
  92.             return -1;
  93.         if (*src > *dst)
  94.             return 1;
  95.     }
  96.     if (i == len || *src == *dst)
  97.         return 0;
  98.     if (*src < *dst)
  99.         return -1;
  100.     return 1;
  101. }
  102.  
  103. /** Copy NULL terminated string.
  104.  *
  105.  * Copy at most 'len' characters from string 'src' to 'dest'.
  106.  * If 'src' is shorter than 'len', '\0' is inserted behind the
  107.  * last copied character.
  108.  *
  109.  * @param src Source string.
  110.  * @param dst Destination buffer.
  111.  * @param len Size of destination buffer.
  112.  */
  113. void strncpy(char *dest, const char *src, size_t len)
  114. {
  115.     int i;
  116.     for (i = 0; i < len; i++) {
  117.         if (!(dest[i] = src[i]))
  118.             return;
  119.     }
  120.     dest[i-1] = '\0';
  121. }
  122.  
  123. /** Convert ascii representation to __native
  124.  *
  125.  * Supports 0x for hexa & 0 for octal notation.
  126.  * Does not check for overflows, does not support negative numbers
  127.  *
  128.  * @param text Textual representation of number
  129.  * @return Converted number or 0 if no valid number ofund
  130.  */
  131. __native atoi(const char *text)
  132. {
  133.     int base = 10;
  134.     __native result = 0;
  135.  
  136.     if (text[0] == '0' && text[1] == 'x') {
  137.         base = 16;
  138.         text += 2;
  139.     } else if (text[0] == '0')
  140.         base = 8;
  141.  
  142.     while (*text) {
  143.         if (base != 16 && *text >= 'A' && *text <= 'F')
  144.             break;
  145.         if (base == 8 && *text >='8')
  146.             break;
  147.  
  148.         if (*text >= '0' && *text <= '9') {
  149.             result *= base;
  150.             result += *text - '0';
  151.         } else if (*text >= 'A' && *text <= 'F') {
  152.             result *= base;
  153.             result += *text - 'A' + 10;
  154.         } else
  155.             break;
  156.         text++;
  157.     }
  158.  
  159.     return result;
  160. }
  161.