mbed_controller / dconfig

The key and value pairs config wrapper class for managing app setting.

Dependents:   dconfig_demo mbed_controller_demo

dconfig.cpp@2:989178d925e9, 2015-03-25 (annotated)

Committer:
hillkim7
Date:
Wed Mar 25 21:04:58 2015 +0000
Revision:
2:989178d925e9
Parent:
1:4f7c80fbd4a1 
Add print_all() method.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hillkim7 1:4f7c80fbd4a1 1 /**
hillkim7 1:4f7c80fbd4a1 2 * @file dconfig.h
hillkim7 1:4f7c80fbd4a1 3 *
hillkim7 1:4f7c80fbd4a1 4 * @author hillkim7@gmail.com
hillkim7 1:4f7c80fbd4a1 5 * @brief The key and value pairs config wrapper class for managing app setting.
hillkim7 1:4f7c80fbd4a1 6 *
hillkim7 1:4f7c80fbd4a1 7 */
hillkim7 1:4f7c80fbd4a1 8
hillkim7 1:4f7c80fbd4a1 9 #include <string.h>
hillkim7 1:4f7c80fbd4a1 10 #include <stdio.h>
hillkim7 1:4f7c80fbd4a1 11 #include "dconfig.h"
hillkim7 1:4f7c80fbd4a1 12
hillkim7 1:4f7c80fbd4a1 13 int DConfig::lookup_as_int( const std::string &key_name, int default_value ) const
hillkim7 1:4f7c80fbd4a1 14 {
hillkim7 1:4f7c80fbd4a1 15 std::string val;
hillkim7 1:4f7c80fbd4a1 16
hillkim7 1:4f7c80fbd4a1 17 if (lookup(key_name, val))
hillkim7 1:4f7c80fbd4a1 18 return atoi(val.c_str());
hillkim7 1:4f7c80fbd4a1 19 else
hillkim7 1:4f7c80fbd4a1 20 return default_value;
hillkim7 1:4f7c80fbd4a1 21 }
hillkim7 1:4f7c80fbd4a1 22
hillkim7 1:4f7c80fbd4a1 23 const char * DConfig::lookup_as_cstr( const std::string &key_name, const char *default_value ) const
hillkim7 1:4f7c80fbd4a1 24 {
hillkim7 1:4f7c80fbd4a1 25 std::map<std::string, std::string>::const_iterator it = this->find(key_name);
hillkim7 1:4f7c80fbd4a1 26 if (it != this->end())
hillkim7 1:4f7c80fbd4a1 27 return it->second.c_str();
hillkim7 1:4f7c80fbd4a1 28
hillkim7 1:4f7c80fbd4a1 29 return default_value;
hillkim7 1:4f7c80fbd4a1 30 }
hillkim7 1:4f7c80fbd4a1 31
hillkim7 1:4f7c80fbd4a1 32 bool DConfig::lookup( const std::string &key_name, std::string &value ) const
hillkim7 1:4f7c80fbd4a1 33 {
hillkim7 1:4f7c80fbd4a1 34 std::map<std::string, std::string>::const_iterator it = this->find(key_name);
hillkim7 1:4f7c80fbd4a1 35 if (it != this->end())
hillkim7 1:4f7c80fbd4a1 36 {
hillkim7 1:4f7c80fbd4a1 37 value = it->second;
hillkim7 1:4f7c80fbd4a1 38 return true;
hillkim7 1:4f7c80fbd4a1 39 }
hillkim7 1:4f7c80fbd4a1 40
hillkim7 1:4f7c80fbd4a1 41 return false;
hillkim7 1:4f7c80fbd4a1 42 }
hillkim7 1:4f7c80fbd4a1 43
hillkim7 1:4f7c80fbd4a1 44 std::string DConfig::lookup( const std::string &key_name ) const
hillkim7 1:4f7c80fbd4a1 45 {
hillkim7 1:4f7c80fbd4a1 46 std::string s;
hillkim7 1:4f7c80fbd4a1 47
hillkim7 1:4f7c80fbd4a1 48 lookup(key_name, s);
hillkim7 1:4f7c80fbd4a1 49
hillkim7 1:4f7c80fbd4a1 50 return s;
hillkim7 1:4f7c80fbd4a1 51 }
hillkim7 1:4f7c80fbd4a1 52
hillkim7 2:989178d925e9 53 bool DConfig::load_from( const char *ptr, size_t ptr_len )
hillkim7 1:4f7c80fbd4a1 54 {
hillkim7 1:4f7c80fbd4a1 55 const char *end = ptr + ptr_len;
hillkim7 1:4f7c80fbd4a1 56 const char *begin;
hillkim7 1:4f7c80fbd4a1 57 std::string str_key, str_value;
hillkim7 1:4f7c80fbd4a1 58
hillkim7 1:4f7c80fbd4a1 59 while (ptr < end)
hillkim7 1:4f7c80fbd4a1 60 {
hillkim7 1:4f7c80fbd4a1 61 // load key part
hillkim7 1:4f7c80fbd4a1 62 begin = ptr;
hillkim7 2:989178d925e9 63 while (*ptr != kv_delimiter_) // go until it reaches delimiter
hillkim7 1:4f7c80fbd4a1 64 {
hillkim7 1:4f7c80fbd4a1 65 ptr++;
hillkim7 1:4f7c80fbd4a1 66 if (ptr > end)
hillkim7 1:4f7c80fbd4a1 67 {
hillkim7 1:4f7c80fbd4a1 68 return false;
hillkim7 1:4f7c80fbd4a1 69 }
hillkim7 1:4f7c80fbd4a1 70 }
hillkim7 1:4f7c80fbd4a1 71
hillkim7 1:4f7c80fbd4a1 72 std::string key(begin, ptr);
hillkim7 1:4f7c80fbd4a1 73 ++ptr; // skip delimiter
hillkim7 1:4f7c80fbd4a1 74 if (ptr >= end)
hillkim7 1:4f7c80fbd4a1 75 {
hillkim7 1:4f7c80fbd4a1 76 return false;
hillkim7 1:4f7c80fbd4a1 77 }
hillkim7 0:7e982de4d3f5 78
hillkim7 1:4f7c80fbd4a1 79 // load value part
hillkim7 1:4f7c80fbd4a1 80 begin = ptr;
hillkim7 2:989178d925e9 81 while (*ptr != item_delimiter_)
hillkim7 1:4f7c80fbd4a1 82 {
hillkim7 1:4f7c80fbd4a1 83 ptr++;
hillkim7 1:4f7c80fbd4a1 84 if (ptr > end)
hillkim7 1:4f7c80fbd4a1 85 {
hillkim7 1:4f7c80fbd4a1 86 return false;
hillkim7 1:4f7c80fbd4a1 87 }
hillkim7 1:4f7c80fbd4a1 88 }
hillkim7 1:4f7c80fbd4a1 89
hillkim7 1:4f7c80fbd4a1 90 std::string val(begin, ptr);
hillkim7 1:4f7c80fbd4a1 91 ++ptr;
hillkim7 1:4f7c80fbd4a1 92 if (ptr > end)
hillkim7 1:4f7c80fbd4a1 93 {
hillkim7 1:4f7c80fbd4a1 94 return false;
hillkim7 1:4f7c80fbd4a1 95 }
hillkim7 1:4f7c80fbd4a1 96
hillkim7 1:4f7c80fbd4a1 97 (*this)[key] = val;
hillkim7 1:4f7c80fbd4a1 98 }
hillkim7 1:4f7c80fbd4a1 99
hillkim7 1:4f7c80fbd4a1 100 return true;
hillkim7 1:4f7c80fbd4a1 101 }
hillkim7 1:4f7c80fbd4a1 102
hillkim7 1:4f7c80fbd4a1 103 static bool put_cstring(DConfigOutput_t func, void *user_data, const char *s, char delimiter)
hillkim7 1:4f7c80fbd4a1 104 {
hillkim7 1:4f7c80fbd4a1 105 while (*s && func(user_data, *s))
hillkim7 1:4f7c80fbd4a1 106 s++;
hillkim7 1:4f7c80fbd4a1 107
hillkim7 1:4f7c80fbd4a1 108 return func(user_data, delimiter);
hillkim7 1:4f7c80fbd4a1 109 }
hillkim7 1:4f7c80fbd4a1 110
hillkim7 2:989178d925e9 111 bool DConfig::save_to( DConfigOutput_t func, void *user_data ) const
hillkim7 1:4f7c80fbd4a1 112 {
hillkim7 1:4f7c80fbd4a1 113 for (std::map<std::string, std::string>::const_iterator it = this->begin();
hillkim7 1:4f7c80fbd4a1 114 it != this->end(); ++it)
hillkim7 1:4f7c80fbd4a1 115 {
hillkim7 2:989178d925e9 116 if (!put_cstring(func, user_data, it->first.c_str(), kv_delimiter_))
hillkim7 1:4f7c80fbd4a1 117 return false;
hillkim7 1:4f7c80fbd4a1 118
hillkim7 2:989178d925e9 119 if (!put_cstring(func, user_data, it->second.c_str(), item_delimiter_))
hillkim7 1:4f7c80fbd4a1 120 return false;
hillkim7 1:4f7c80fbd4a1 121 }
hillkim7 1:4f7c80fbd4a1 122
hillkim7 1:4f7c80fbd4a1 123 return true;
hillkim7 1:4f7c80fbd4a1 124 }
hillkim7 1:4f7c80fbd4a1 125
hillkim7 2:989178d925e9 126
hillkim7 2:989178d925e9 127 static bool print_char(void *user_data, char c)
hillkim7 2:989178d925e9 128 {
hillkim7 2:989178d925e9 129 if (c == '\n')
hillkim7 2:989178d925e9 130 putchar('\r');
hillkim7 2:989178d925e9 131 putchar(c);
hillkim7 2:989178d925e9 132
hillkim7 2:989178d925e9 133 return true;
hillkim7 2:989178d925e9 134 }
hillkim7 2:989178d925e9 135
hillkim7 2:989178d925e9 136 void DConfig::print_all( void ) const
hillkim7 2:989178d925e9 137 {
hillkim7 2:989178d925e9 138 save_to(print_char, NULL);
hillkim7 2:989178d925e9 139 }
hillkim7 2:989178d925e9 140
hillkim7 1:4f7c80fbd4a1 141 static bool count_config(void *user_data, char c)
hillkim7 1:4f7c80fbd4a1 142 {
hillkim7 1:4f7c80fbd4a1 143 size_t *cnt = (size_t*)user_data;
hillkim7 1:4f7c80fbd4a1 144
hillkim7 1:4f7c80fbd4a1 145 *cnt += 1;
hillkim7 1:4f7c80fbd4a1 146
hillkim7 1:4f7c80fbd4a1 147 return true;
hillkim7 1:4f7c80fbd4a1 148 }
hillkim7 1:4f7c80fbd4a1 149
hillkim7 1:4f7c80fbd4a1 150 size_t DConfig::estimate_save( void ) const
hillkim7 1:4f7c80fbd4a1 151 {
hillkim7 1:4f7c80fbd4a1 152 size_t cnt = 0;
hillkim7 1:4f7c80fbd4a1 153
hillkim7 1:4f7c80fbd4a1 154 save_to(count_config, &cnt);
hillkim7 1:4f7c80fbd4a1 155
hillkim7 1:4f7c80fbd4a1 156 return cnt;
hillkim7 1:4f7c80fbd4a1 157 }
hillkim7 1:4f7c80fbd4a1 158
hillkim7 1:4f7c80fbd4a1 159 bool DConfig::value_replace( const std::string &key_name, std::string value )
hillkim7 1:4f7c80fbd4a1 160 {
hillkim7 1:4f7c80fbd4a1 161 if (!has_key(key_name))
hillkim7 1:4f7c80fbd4a1 162 return false;
hillkim7 1:4f7c80fbd4a1 163
hillkim7 1:4f7c80fbd4a1 164 (*this)[key_name] = value;
hillkim7 1:4f7c80fbd4a1 165
hillkim7 1:4f7c80fbd4a1 166 return true;
hillkim7 1:4f7c80fbd4a1 167 }
hillkim7 1:4f7c80fbd4a1 168
hillkim7 1:4f7c80fbd4a1 169 bool DConfig::value_replace( const std::string &key_name, int value )
hillkim7 1:4f7c80fbd4a1 170 {
hillkim7 1:4f7c80fbd4a1 171 char tmp[16];
hillkim7 1:4f7c80fbd4a1 172
hillkim7 1:4f7c80fbd4a1 173 sprintf(tmp, "%d", value);
hillkim7 1:4f7c80fbd4a1 174
hillkim7 1:4f7c80fbd4a1 175 return value_replace(key_name, tmp);
hillkim7 1:4f7c80fbd4a1 176 }
hillkim7 2:989178d925e9 177