carl9170fw/carlfw/src/printf.c

   1 /*
   2  * Copyright (C) 2004,2008  Kustaa Nyholm
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * with this program; If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "carl9170.h"
  19 #include "printf.h"
  20
  21 #ifdef CONFIG_CARL9170FW_PRINTF
  22 static char *bf;
  23 static char buf[12];
  24 static unsigned int num;
  25 static char uc;
  26 static char zs;
  27
  28 static void out(const char c)
  29 {
  30         *bf++ = c;
  31 }
  32
  33 static void outDgt(const char dgt)
  34 {
  35         out(dgt + (dgt < 10 ? '0' : (uc ? 'A' : 'a') - 10));
  36         zs = 1;
  37 }
  38
  39 static void divOut(const unsigned int d)
  40 {
  41         unsigned char dgt = 0;
  42
  43         while (num >= d) {
  44                 num -= d;
  45                 dgt++;
  46         }
  47
  48         if (zs || dgt > 0)
  49                 outDgt(dgt);
  50 }
  51
  52 void tfp_printf(const char *fmt, ...)
  53 {
  54         va_list va;
  55         char *p;
  56         unsigned int i;
  57         char ch;
  58
  59         va_start(va, fmt);
  60
  61         while ((ch = *(fmt++))) {
  62                 if (ch != '%') {
  63                         putcharacter(ch);
  64                 } else {
  65                         char lz = 0;
  66                         char w = 0;
  67                         ch = *(fmt++);
  68
  69                         if (ch == '0') {
  70                                 ch = *(fmt++);
  71                                 lz = 1;
  72                         }
  73
  74                         if (ch >= '0' && ch <= '9') {
  75                                 w = 0;
  76                                 while (ch >= '0' && ch <= '9') {
  77                                         w = (((w << 2) + w) << 1) + ch - '0';
  78                                         ch = *fmt++;
  79                                         }
  80                         }
  81
  82                         bf = buf;
  83                         p = bf;
  84                         zs = 0;
  85
  86                         switch (ch) {
  87                         case 0:
  88                                 goto abort;
  89
  90                         case 'u':
  91                         case 'd':
  92                                 num = va_arg(va, unsigned int);
  93                                 if (ch == 'd' && (int) num < 0) {
  94                                         num = -(int)num;
  95                                         out('-');
  96                                 }
  97
  98                                 for (i = 100000000; i != 1; i /= 10)
  99                                         divOut(i);
 100
 101                                 outDgt(num);
 102                                 break;
 103
 104                         case 'p':
 105                         case 'x':
 106                         case 'X':
 107                                 uc = ch == 'X';
 108                                 num = va_arg(va, unsigned int);
 109                                 for (i = 0x10000000; i != 0x1; i >>= 4)
 110                                         divOut(i);
 111
 112                                 outDgt(num);
 113                                 break;
 114
 115                         case 'c':
 116                                 out((char)(va_arg(va, int)));
 117                                 break;
 118
 119                         case 's':
 120                                 p = va_arg(va, char*);
 121                                 break;
 122                         case '%':
 123                                 out('%');
 124                                 break;
 125
 126                         default:
 127                                 break;
 128                                 }
 129
 130                         *bf = 0;
 131                         bf = p;
 132                         while (*bf++ && w > 0)
 133                                 w--;
 134
 135                         while (w-- > 0)
 136                                 putcharacter(lz ? '0' : ' ');
 137
 138                         while ((ch = *p++))
 139                                 putcharacter(ch);
 140                 }
 141         }
 142
 143 abort:
 144         putcharacter('\0');
 145         va_end(va);
 146 }
 147
 148 #else
 149
 150 void min_printf(const char *fmt, ...)
 151 {
 152         char ch;
 153
 154         do {
 155                 ch = *(fmt++);
 156                 putcharacter(ch);
 157         } while (ch);
 158 }
 159
 160 #endif /* CONFIG_CARL9170FW_PRINTF */