1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
* Tiny printf version for SPL
*
* Copied from:
* http://www.sparetimelabs.com/printfrevisited/printfrevisited.php
*
* Copyright (C) 2004,2008 Kustaa Nyholm
*
* SPDX-License-Identifier: LGPL-2.1+
*/
#include <common.h>
#include <stdarg.h>
#include <serial.h>
static char *bf;
static char zs;
/* Current position in sprintf() output string */
static char *outstr;
static void out(char c)
{
*bf++ = c;
}
static void out_dgt(char dgt)
{
out(dgt + (dgt < 10 ? '0' : 'a' - 10));
zs = 1;
}
static void div_out(unsigned int *num, unsigned int div)
{
unsigned char dgt = 0;
while (*num >= div) {
*num -= div;
dgt++;
}
if (zs || dgt > 0)
out_dgt(dgt);
}
int _vprintf(const char *fmt, va_list va, void (*putc)(const char ch))
{
char ch;
char *p;
unsigned int num;
char buf[12];
unsigned int div;
while ((ch = *(fmt++))) {
if (ch != '%') {
putc(ch);
} else {
bool lz = false;
int width = 0;
ch = *(fmt++);
if (ch == '0') {
ch = *(fmt++);
lz = 1;
}
if (ch >= '0' && ch <= '9') {
width = 0;
while (ch >= '0' && ch <= '9') {
width = (width * 10) + ch - '0';
ch = *fmt++;
}
}
bf = buf;
p = bf;
zs = 0;
switch (ch) {
case '\0':
goto abort;
case 'u':
case 'd':
num = va_arg(va, unsigned int);
if (ch == 'd' && (int)num < 0) {
num = -(int)num;
out('-');
}
if (!num) {
out_dgt(0);
} else {
for (div = 1000000000; div; div /= 10)
div_out(&num, div);
}
break;
case 'x':
num = va_arg(va, unsigned int);
if (!num) {
out_dgt(0);
} else {
for (div = 0x10000000; div; div /= 0x10)
div_out(&num, div);
}
break;
case 'c':
out((char)(va_arg(va, int)));
break;
case 's':
p = va_arg(va, char*);
break;
case '%':
out('%');
default:
break;
}
*bf = 0;
bf = p;
while (*bf++ && width > 0)
width--;
while (width-- > 0)
putc(lz ? '0' : ' ');
if (p) {
while ((ch = *p++))
putc(ch);
}
}
}
abort:
return 0;
}
int vprintf(const char *fmt, va_list va)
{
return _vprintf(fmt, va, putc);
}
int printf(const char *fmt, ...)
{
va_list va;
int ret;
va_start(va, fmt);
ret = _vprintf(fmt, va, putc);
va_end(va);
return ret;
}
static void putc_outstr(char ch)
{
*outstr++ = ch;
}
int sprintf(char *buf, const char *fmt, ...)
{
va_list va;
int ret;
va_start(va, fmt);
outstr = buf;
ret = _vprintf(fmt, va, putc_outstr);
va_end(va);
*outstr = '\0';
return ret;
}
/* Note that size is ignored */
int snprintf(char *buf, size_t size, const char *fmt, ...)
{
va_list va;
int ret;
va_start(va, fmt);
outstr = buf;
ret = _vprintf(fmt, va, putc_outstr);
va_end(va);
*outstr = '\0';
return ret;
}
|
