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  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "carl9170.h"
  20 #include "printf.h"
  21
  22 #ifdef CONFIG_CARL9170FW_PRINTF
  23 static char *bf;
  24 static char buf[12];
  25 static unsigned int num;
  26 static char uc;
  27 static char zs;
  28
  29 static void out(const char c)
  30 {
  31         *bf++ = c;
  32 }
  33
  34 static void outDgt(const char dgt)
  35 {
  36         out(dgt + (dgt < 10 ? '0' : (uc ? 'A' : 'a') - 10));
  37         zs = 1;
  38 }
  39
  40 static void divOut(const unsigned int d)
  41 {
  42         unsigned char dgt = 0;
  43
  44         while (num >= d) {
  45                 num -= d;
  46                 dgt++;
  47         }
  48
  49         if (zs || dgt > 0)
  50                 outDgt(dgt);
  51 }
  52
  53 void tfp_printf(const char *fmt, ...)
  54 {
  55         va_list va;
  56         char *p;
  57         unsigned int i;
  58         char ch;
  59
  60         va_start(va, fmt);
  61
  62         while ((ch = *(fmt++))) {
  63                 if (ch != '%') {
  64                         putcharacter(ch);
  65                 } else {
  66                         char lz = 0;
  67                         char w = 0;
  68                         ch = *(fmt++);
  69
  70                         if (ch == '0') {
  71                                 ch = *(fmt++);
  72                                 lz = 1;
  73                         }
  74
  75                         if (ch >= '0' && ch <= '9') {
  76                                 w = 0;
  77                                 while (ch >= '0' && ch <= '9') {
  78                                         w = (((w << 2) + w) << 1) + ch - '0';
  79                                         ch = *fmt++;
  80                                         }
  81                         }
  82
  83                         bf = buf;
  84                         p = bf;
  85                         zs = 0;
  86
  87                         switch (ch) {
  88                         case 0:
  89                                 goto abort;
  90
  91                         case 'u':
  92                         case 'd':
  93                                 num = va_arg(va, unsigned int);
  94                                 if (ch == 'd' && (int) num < 0) {
  95                                         num = -(int)num;
  96                                         out('-');
  97                                 }
  98
  99                                 for (i = 100000000; i != 1; i /= 10)
 100                                         divOut(i);
 101
 102                                 outDgt(num);
 103                                 break;
 104
 105                         case 'p':
 106                         case 'x':
 107                         case 'X':
 108                                 uc = ch == 'X';
 109                                 num = va_arg(va, unsigned int);
 110                                 for (i = 0x10000000; i != 0x1; i >>= 4)
 111                                         divOut(i);
 112
 113                                 outDgt(num);
 114                                 break;
 115
 116                         case 'c':
 117                                 out((char)(va_arg(va, int)));
 118                                 break;
 119
 120                         case 's':
 121                                 p = va_arg(va, char*);
 122                                 break;
 123                         case '%':
 124                                 out('%');
 125                                 break;
 126
 127                         default:
 128                                 break;
 129                                 }
 130
 131                         *bf = 0;
 132                         bf = p;
 133                         while (*bf++ && w > 0)
 134                                 w--;
 135
 136                         while (w-- > 0)
 137                                 putcharacter(lz ? '0' : ' ');
 138
 139                         while ((ch = *p++))
 140                                 putcharacter(ch);
 141                 }
 142         }
 143
 144 abort:
 145         putcharacter('\0');
 146         va_end(va);
 147 }
 148
 149 #else
 150
 151 void min_printf(const char *fmt, ...)
 152 {
 153         char ch;
 154
 155         do {
 156                 ch = *(fmt++);
 157                 putcharacter(ch);
 158         } while (ch);
 159 }
 160
 161 #endif /* CONFIG_CARL9170FW_PRINTF */