newlib/libc/sys/epiphany/e_printf.c

   1 /* e_printf.c
   2
   3    Copyright (c) 2011, Adapteva, Inc.
   4    All rights reserved.
   5
   6    Redistribution and use in source and binary forms, with or without
   7    modification, are permitted provided that the following conditions are met:
   8     * Redistributions of source code must retain the above copyright notice,
   9       this list of conditions and the following disclaimer.
  10     * Redistributions in binary form must reproduce the above copyright
  11       notice, this list of conditions and the following disclaimer in the
  12       documentation and/or other materials provided with the distribution.
  13     * Neither the name of Adapteva nor the names of its contributors may be
  14       used to endorse or promote products derived from this software without
  15       specific prior written permission.
  16
  17    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  21    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27    POSSIBILITY OF SUCH DAMAGE.                                               */
  28 #include <stdarg.h>
  29 #include <string.h>
  30
  31
  32
  33
  34 int trap_7( char *s , int _bsize, int _argsize) {
  35         volatile  register void* buff_adrr asm("r0") = s;
  36         volatile register unsigned bsize asm("r1") = _bsize;
  37         volatile register unsigned argsize asm("r2") = _argsize;
  38         volatile register int result asm("r0");
  39         __asm__ __volatile__ ("trap 7" : "=r" (result) : "r" (buff_adrr), "r" (bsize) , "r" (argsize));
  40         return result;
  41
  42 }
  43
  44 //#include <stdio.h>
  45 //#include <string.h>
  46 //#include <stdlib.h>
  47
  48 volatile static int*fp_int =0;
  49 volatile int getIntFromFloat(float *f) {
  50         fp_int= (int*)f;
  51
  52         return *fp_int;
  53 }
  54
  55
  56 int e_printf(const char *fmt, ...) {
  57
  58         char buf[256],*p,*fmt_p;
  59         va_list args;
  60         int percentMet=0;
  61         int pos = 0;
  62
  63         char *v_arg_s;
  64         unsigned v_arg_int;
  65         float fl_f[1];
  66
  67         unsigned fmt_len =  strnlen(fmt,128);
  68
  69         fmt_p = (char*)fmt;
  70
  71         //printf("---- 111 +++  %d  \n", strlen(fmt));
  72
  73         va_start(args, fmt);
  74
  75         p = (char*)buf;
  76
  77         strcpy(buf,fmt);
  78         pos =fmt_len;
  79         p[pos] = '\0';
  80         pos++;
  81
  82         va_start(args, fmt);
  83
  84         while (*fmt_p) {
  85
  86 //              putchar(*p);
  87 //              puts("");
  88
  89                 if(*fmt_p == '%') {
  90                         percentMet=1;
  91                 }
  92                 if(*fmt_p == 's'  && percentMet == 1 ) {
  93                         percentMet=0;
  94                         v_arg_s = va_arg(args, char *);
  95                         if (!v_arg_s) v_arg_s = "<NULL>";
  96
  97                         strcpy(p + pos , v_arg_s );
  98                         pos+=strlen(v_arg_s);
  99
 100                         p[pos] = '\0';
 101                         pos++;
 102                 }
 103
 104                 if((*fmt_p == 'i' || *fmt_p == 'd' || *fmt_p == 'u'   || *fmt_p == 'x' || *fmt_p == 'f' )  && percentMet == 1 ) {
 105                         percentMet=0;
 106                         if(*fmt_p == 'f' ) {
 107                                 fl_f[0] = (float)va_arg(args, double);
 108                                 //printf("v_arg_ float  --- %f \n", fl_f[0]);
 109                                 //printf("v_arg_ p  --- %x \n", *( (unsigned *)fl_f));
 110
 111                                 v_arg_int = getIntFromFloat (fl_f);
 112
 113                                 //v_arg_int = 0;
 114
 115                         } else {
 116                                 v_arg_int =  (int)va_arg(args, int);
 117                         }
 118
 119 //                      if(*fmt_p == 'd') {
 120 //                              printf("v_arg_int --- %d \n", v_arg_int);
 121 //                      }
 122 //                      if(*fmt_p == 'x') {
 123 //                              printf("v_arg_int --- %x \n", v_arg_int);
 124 //                      }
 125 //                      if(*fmt_p == 'f') {
 126 //                              printf("fff++v_arg_int --- %x \n", v_arg_int);
 127 //                              fl = (float*)&v_arg_int;
 128 //                              printf("fff++ v_arg_float --- %f \n", *fl);
 129 //                      }
 130
 131                         *(p + pos) = ((v_arg_int>>24) & 0xff);
 132                         pos++;
 133                         *(p + pos) = ((v_arg_int>>16) & 0xff);
 134                         pos++;
 135                         *(p + pos) = ((v_arg_int>>8) & 0xff);
 136                         pos++;
 137                         *(p + pos) = ((v_arg_int>>0) & 0xff);
 138                         pos++;
 139                 }
 140
 141                 fmt_p++;
 142         }
 143
 144         va_end(args);
 145
 146         //printf(" +++  %d %d \n" , strlen(fmt), pos);
 147
 148         return trap_7((char*)buf ,fmt_len, pos) ;
 149         //return 1;
 150 }