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annotate packages/cygmon/current/misc/bsp/common/hex-utils.c @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
parents
children e0c0827131d1
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76
435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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1 //==========================================================================
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2 //
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3 // hex-utils.c
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4 //
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5 // Utilities for dealing with hexadecimal strings.
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s):
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35 // Contributors: gthomas
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36 // Date: 1999-10-20
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37 // Purpose:
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38 // Description:
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39 //
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //=========================================================================
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44
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45
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46 #include <bsp/hex-utils.h>
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47
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48 int
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49 __hex(char ch)
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50 {
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51 if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10);
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52 if ((ch >= '0') && (ch <= '9')) return (ch-'0');
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53 if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10);
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54 return (-1);
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55 }
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56
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57
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58 /*
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59 * Convert the hex data in 'buf' into 'count' bytes to be placed in 'mem'.
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60 * Returns a pointer to the character in mem AFTER the last byte written.
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61 */
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62 char *
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63 __unpack_bytes_to_mem(char *buf, char *mem, int count)
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64 {
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65 int i;
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66 char ch;
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67
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68 for (i = 0; i < count; i++) {
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69 ch = __hex(*buf++) << 4;
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70 ch = ch + __hex(*buf++);
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71 *mem++ = ch;
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72 }
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73 return(mem);
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74 }
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75
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76 /*
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77 * While finding valid hex chars, build an unsigned long int.
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78 * Return number of hex chars processed.
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79 */
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80 int
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81 __unpack_ulong(char **ptr, unsigned long *val)
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82 {
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83 int numChars = 0;
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84 int hexValue;
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85
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86 *val = 0;
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87
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88 while (**ptr) {
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89 hexValue = __hex(**ptr);
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90 if (hexValue >= 0) {
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91 *val = (*val << 4) | hexValue;
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92 numChars ++;
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93 } else
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94 break;
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95 (*ptr)++;
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96 }
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97 return (numChars);
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98 }
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99
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100
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101 /*
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102 * Unpack 'count' hex characters, forming them into a binary value.
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103 * Return that value as an int. Adjust the source pointer accordingly.
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104 */
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105 int
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106 __unpack_nibbles(char **ptr, int count)
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107 {
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108 int value = 0;
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109
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110 while (--count >= 0) {
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111 value = (value << 4) | __hex(**ptr);
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112 (*ptr)++;
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113 }
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114 return value;
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115 }
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116
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117