git.gag.com Git - fw/sdcc/blob - as/link/z80/lkihx.c

   1 /* lkihx.c */
   2
   3 /*
   4  * (C) Copyright 1989-1995
   5  * All Rights Reserved
   6  *
   7  * Alan R. Baldwin
   8  * 721 Berkeley St.
   9  * Kent, Ohio  44240
  10  */
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 //#include <alloc.h>
  15 #include "aslink.h"
  16
  17 /*)Module       lkihx.c
  18  *
  19  *      The module lkihx.c contains the function to
  20  *      output the relocated object code in the
  21  *      Intel Hex format.
  22  *
  23  *      lkihx.c contains the following function:
  24  *              VOID    ihx(i)
  25  *
  26  *      lkihx.c contains no local variables.
  27  */
  28
  29 /*Intel Hex Format
  30  *      Record Mark Field    -  This  field  signifies  the  start  of a
  31  *                              record, and consists of an  ascii  colon
  32  *                              (:).
  33  *
  34  *      Record Length Field  -  This   field   consists   of  two  ascii
  35  *                              characters which indicate the number  of
  36  *                              data   bytes   in   this   record.   The
  37  *                              characters are the result of  converting
  38  *                              the  number  of  bytes  in binary to two
  39  *                              ascii characters, high digit first.   An
  40  *                              End  of  File  record contains two ascii
  41  *                              zeros in this field.
  42  *
  43  *      Load Address Field   -  This  field  consists  of the four ascii
  44  *                              characters which result from  converting
  45  *                              the  the  binary value of the address in
  46  *                              which to begin loading this record.  The
  47  *                              order is as follows:
  48  *
  49  *                                  High digit of high byte of address.
  50  *                                  Low digit of high byte of address.
  51  *                                  High digit of low byte of address.
  52  *                                  Low digit of low byte of address.
  53  *
  54  *                              In an End of File record this field con-
  55  *                              sists of either four ascii zeros or  the
  56  *                              program  entry  address.   Currently the
  57  *                              entry address option is not supported.
  58  *
  59  *      Record Type Field    -  This  field  identifies the record type,
  60  *                              which is either 0 for data records or  1
  61  *                              for  an End of File record.  It consists
  62  *                              of two ascii characters, with  the  high
  63  *                              digit of the record type first, followed
  64  *                              by the low digit of the record type.
  65  *
  66  *      Data Field           -  This  field consists of the actual data,
  67  *                              converted to two ascii characters,  high
  68  *                              digit first.  There are no data bytes in
  69  *                              the End of File record.
  70  *
  71  *      Checksum Field       -  The  checksum  field is the 8 bit binary
  72  *                              sum of the record length field, the load
  73  *                              address  field,  the  record type field,
  74  *                              and the data field.  This  sum  is  then
  75  *                              negated  (2's  complement) and converted
  76  *                              to  two  ascii  characters,  high  digit
  77  *                              first.
  78  */
  79
  80 /*)Function     ihx(i)
  81  *
  82  *              int     i               0 - process data
  83  *                                      1 - end of data
  84  *
  85  *      The function ihx() outputs the relocated data
  86  *      in the standard Intel Hex format.
  87  *
  88  *      local variables:
  89  *              Addr_T  chksum          byte checksum
  90  *
  91  *      global variables:
  92  *              int     hilo            byte order
  93  *              FILE *  ofp             output file handle
  94  *              int     rtcnt           count of data words
  95  *              int     rtflg[]         output the data flag
  96  *              Addr_T  rtval[]         relocated data
  97  *
  98  *      functions called:
  99  *              int     fprintf()       c_library
 100  *
 101  *      side effects:
 102  *              The data is output to the file defined by ofp.
 103  */
 104
 105 VOID
 106 ihx(i)
 107 {
 108         register Addr_T chksum;
 109
 110         if (i) {
 111                 if (hilo == 0) {
 112                         chksum = rtval[0];
 113                         rtval[0] = rtval[1];
 114                         rtval[1] = chksum;
 115                 }
 116                 for (i = 0, chksum = -2; i < rtcnt; i++) {
 117                         if (rtflg[i])
 118                                 chksum++;
 119                 }
 120                 fprintf(ofp, ":%02X", chksum);
 121                 for (i = 0; i < rtcnt ; i++) {
 122                         if (rtflg[i]) {
 123                                 fprintf(ofp, "%02X", rtval[i]);
 124                                 chksum += rtval[i];
 125                         }
 126                         if (i == 1) {
 127                                 fprintf(ofp, "00");
 128                         }
 129                 }
 130                 fprintf(ofp, "%02X\n", (0-chksum) & 0xff);
 131         } else {
 132                 fprintf(ofp, ":00000001FF\n");
 133         }
 134 }