1 | /* |
---|
2 | * (C) Copyright 1997 - |
---|
3 | * - NavIST Group - Real-Time Distributed Systems and Industrial Automation |
---|
4 | * |
---|
5 | * http://pandora.ist.utl.pt |
---|
6 | * |
---|
7 | * Instituto Superior Tecnico * Lisboa * PORTUGAL |
---|
8 | * |
---|
9 | * Disclaimer: |
---|
10 | * |
---|
11 | * This file is provided "AS IS" without warranty of any kind, either |
---|
12 | * expressed or implied. |
---|
13 | * |
---|
14 | * This code is based on code by: Jose Rufino - IST |
---|
15 | */ |
---|
16 | |
---|
17 | #if HAVE_CONFIG_H |
---|
18 | #include "config.h" |
---|
19 | #endif |
---|
20 | |
---|
21 | #include <stdarg.h> |
---|
22 | #include <stdio.h> |
---|
23 | #include <stdbool.h> |
---|
24 | #include <rtems/bspIo.h> |
---|
25 | |
---|
26 | static void printNum( |
---|
27 | long num, |
---|
28 | unsigned base, |
---|
29 | bool sign, |
---|
30 | unsigned maxwidth, |
---|
31 | char lead |
---|
32 | ); |
---|
33 | |
---|
34 | /* |
---|
35 | * vprintk |
---|
36 | * |
---|
37 | * A simplified version of printf intended for use when the |
---|
38 | * console is not yet initialized or in ISR's. |
---|
39 | * |
---|
40 | * Arguments: |
---|
41 | * as in printf: fmt - format string, ... - unnamed arguments. |
---|
42 | */ |
---|
43 | void vprintk( |
---|
44 | const char *fmt, |
---|
45 | va_list ap |
---|
46 | ) |
---|
47 | { |
---|
48 | for (; *fmt != '\0'; fmt++) { |
---|
49 | unsigned base = 0; |
---|
50 | unsigned width = 0; |
---|
51 | bool lflag = false; |
---|
52 | bool minus = false; |
---|
53 | bool sign = false; |
---|
54 | char lead = ' '; |
---|
55 | char c; |
---|
56 | |
---|
57 | if (*fmt != '%') { |
---|
58 | rtems_putc(*fmt); |
---|
59 | continue; |
---|
60 | } |
---|
61 | fmt++; |
---|
62 | if (*fmt == '0' ) { |
---|
63 | lead = '0'; |
---|
64 | fmt++; |
---|
65 | } |
---|
66 | if (*fmt == '-' ) { |
---|
67 | minus = true; |
---|
68 | fmt++; |
---|
69 | } |
---|
70 | while (*fmt >= '0' && *fmt <= '9' ) { |
---|
71 | width *= 10; |
---|
72 | width += ((unsigned) *fmt - '0'); |
---|
73 | fmt++; |
---|
74 | } |
---|
75 | |
---|
76 | if ((c = *fmt) == 'l') { |
---|
77 | lflag = true; |
---|
78 | c = *++fmt; |
---|
79 | } |
---|
80 | if ( c == 'c' ) { |
---|
81 | /* need a cast here since va_arg() only takes fully promoted types */ |
---|
82 | char chr = (char) va_arg(ap, int); |
---|
83 | rtems_putc(chr); |
---|
84 | continue; |
---|
85 | } |
---|
86 | if ( c == 's' ) { |
---|
87 | unsigned i, len; |
---|
88 | char *s, *str; |
---|
89 | |
---|
90 | str = va_arg(ap, char *); |
---|
91 | |
---|
92 | if ( str == NULL ) { |
---|
93 | str = ""; |
---|
94 | } |
---|
95 | |
---|
96 | /* calculate length of string */ |
---|
97 | for ( len=0, s=str ; *s ; len++, s++ ) |
---|
98 | ; |
---|
99 | |
---|
100 | /* leading spaces */ |
---|
101 | if ( !minus ) |
---|
102 | for ( i=len ; i<width ; i++ ) |
---|
103 | rtems_putc(' '); |
---|
104 | |
---|
105 | /* no width option */ |
---|
106 | if (width == 0) { |
---|
107 | width = len; |
---|
108 | } |
---|
109 | |
---|
110 | /* output the string */ |
---|
111 | for ( i=0 ; i<width && *str ; str++ ) |
---|
112 | rtems_putc(*str); |
---|
113 | |
---|
114 | /* trailing spaces */ |
---|
115 | if ( minus ) |
---|
116 | for ( i=len ; i<width ; i++ ) |
---|
117 | rtems_putc(' '); |
---|
118 | |
---|
119 | continue; |
---|
120 | } |
---|
121 | |
---|
122 | /* must be a numeric format or something unsupported */ |
---|
123 | if ( c == 'o' || c == 'O' ) { |
---|
124 | base = 8; sign = false; |
---|
125 | } else if ( c == 'i' || c == 'I' || |
---|
126 | c == 'd' || c == 'D' ) { |
---|
127 | base = 10; sign = true; |
---|
128 | } else if ( c == 'u' || c == 'U' ) { |
---|
129 | base = 10; sign = false; |
---|
130 | } else if ( c == 'x' || c == 'X' ) { |
---|
131 | base = 16; sign = false; |
---|
132 | } else if ( c == 'p' ) { |
---|
133 | base = 16; sign = false; lflag = true; |
---|
134 | } else { |
---|
135 | rtems_putc(c); |
---|
136 | continue; |
---|
137 | } |
---|
138 | |
---|
139 | printNum( |
---|
140 | lflag ? va_arg(ap, long) : (long) va_arg(ap, int), |
---|
141 | base, |
---|
142 | sign, |
---|
143 | width, |
---|
144 | lead |
---|
145 | ); |
---|
146 | } |
---|
147 | } |
---|
148 | |
---|
149 | /* |
---|
150 | * printNum - print number in a given base. |
---|
151 | * Arguments |
---|
152 | * num - number to print |
---|
153 | * base - base used to print the number. |
---|
154 | */ |
---|
155 | static void printNum( |
---|
156 | long num, |
---|
157 | unsigned base, |
---|
158 | bool sign, |
---|
159 | unsigned maxwidth, |
---|
160 | char lead |
---|
161 | ) |
---|
162 | { |
---|
163 | unsigned long unsigned_num; |
---|
164 | unsigned long n; |
---|
165 | unsigned count; |
---|
166 | char toPrint[20]; |
---|
167 | |
---|
168 | if ( sign && (num < 0) ) { |
---|
169 | rtems_putc('-'); |
---|
170 | unsigned_num = (unsigned long) -num; |
---|
171 | if (maxwidth) maxwidth--; |
---|
172 | } else { |
---|
173 | unsigned_num = (unsigned long) num; |
---|
174 | } |
---|
175 | |
---|
176 | count = 0; |
---|
177 | while ((n = unsigned_num / base) > 0) { |
---|
178 | toPrint[count++] = (char) (unsigned_num - (n * base)); |
---|
179 | unsigned_num = n; |
---|
180 | } |
---|
181 | toPrint[count++] = (char) unsigned_num; |
---|
182 | |
---|
183 | for (n=maxwidth ; n > count; n-- ) |
---|
184 | rtems_putc(lead); |
---|
185 | |
---|
186 | for (n = 0; n < count; n++) { |
---|
187 | rtems_putc("0123456789ABCDEF"[(int)(toPrint[count-(n+1)])]); |
---|
188 | } |
---|
189 | } |
---|