Subversion Repositories HelenOS

Rev

Rev 601 | Rev 607 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 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>
517 jermar 34
#include <typedefs.h>
1 jermar 35
 
62 decky 36
__u32   haltstate = 0; /**< Halt flag */
1 jermar 37
 
62 decky 38
 
39
/** Halt wrapper
40
 *
41
 * Set halt flag and halt the cpu.
42
 *
43
 */
1 jermar 44
void halt(void)
45
{
46
    haltstate = 1;
413 jermar 47
    interrupts_disable();
227 jermar 48
    if (CPU)
49
        printf("cpu%d: halted\n", CPU->id);
50
    else
51
        printf("cpu: halted\n");
1 jermar 52
    cpu_halt();
53
}
54
 
517 jermar 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
}
1 jermar 70
 
62 decky 71
/** Compare two NULL terminated strings
72
 *
517 jermar 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.
62 decky 77
 *
78
 * @param src First string to compare.
79
 * @param dst Second string to compare.
517 jermar 80
 * @param len Maximal length for comparison.
62 decky 81
 *
601 palkovsky 82
 * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller.
62 decky 83
 *
1 jermar 84
 */
518 jermar 85
int strncmp(const char *src, const char *dst, size_t len)
1 jermar 86
{
87
    int i;
88
 
89
    i = 0;
601 palkovsky 90
    for (;*src && *dst && i < len;src++,dst++,i++) {
91
        if (*src < *dst)
92
            return -1;
93
        if (*src > *dst)
94
            return 1;
1 jermar 95
    }
601 palkovsky 96
    if (i == len || *src == *dst)
97
        return 0;
98
    if (*src < *dst)
99
        return -1;
1 jermar 100
    return 1;
101
}
331 bondari 102
 
518 jermar 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
    }
585 palkovsky 120
    dest[i-1] = '\0';
518 jermar 121
}
582 palkovsky 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) {
603 palkovsky 143
        if (base != 16 && \
144
            ((*text >= 'A' && *text <= 'F' )
145
             || (*text >='a' && *text <='f')))
582 palkovsky 146
            break;
147
        if (base == 8 && *text >='8')
148
            break;
149
 
591 palkovsky 150
        if (*text >= '0' && *text <= '9') {
151
            result *= base;
582 palkovsky 152
            result += *text - '0';
591 palkovsky 153
        } else if (*text >= 'A' && *text <= 'F') {
154
            result *= base;
582 palkovsky 155
            result += *text - 'A' + 10;
603 palkovsky 156
        } else if (*text >= 'a' && *text <= 'f') {
157
            result *= base;
158
            result += *text - 'a' + 10;
591 palkovsky 159
        } else
582 palkovsky 160
            break;
161
        text++;
162
    }
163
 
164
    return result;
165
}