src/libs/ConfigSource.cpp

   1 #include "utils.h"
   2 #include "ConfigSource.h"
   3 #include "ConfigValue.h"
   4 #include "ConfigCache.h"
   5
   6 #include "stdio.h"
   7
   8 ConfigValue* ConfigSource::process_line(const string &buffer)
   9 {
  10     if( buffer[0] == '#' ) {
  11         return NULL;
  12     }
  13     if( buffer.length() < 3 ) {
  14         return NULL;
  15     }
  16
  17     size_t begin_key = buffer.find_first_not_of(" \t");
  18     if(begin_key == string::npos || buffer[begin_key] == '#') return NULL; // comment line or blank line
  19
  20     size_t end_key = buffer.find_first_of(" \t", begin_key);
  21     if(end_key == string::npos) {
  22         printf("ERROR: config file line %s is invalid, no key value pair found\r\n", buffer.c_str());
  23         return NULL;
  24     }
  25
  26     size_t begin_value = buffer.find_first_not_of(" \t", end_key);
  27     if(begin_value == string::npos || buffer[begin_value] == '#') {
  28         printf("ERROR: config file line %s has no value\r\n", buffer.c_str());
  29         return NULL;
  30     }
  31
  32     string key= buffer.substr(begin_key,  end_key - begin_key);
  33     uint16_t check_sums[3];
  34     get_checksums(check_sums, key);
  35
  36     ConfigValue *result = new ConfigValue;
  37
  38     result->found = true;
  39     result->check_sums[0] = check_sums[0];
  40     result->check_sums[1] = check_sums[1];
  41     result->check_sums[2] = check_sums[2];
  42
  43     size_t end_value = buffer.find_first_of("\r\n# \t", begin_value + 1);
  44     size_t vsize = end_value == string::npos ? end_value : end_value - begin_value;
  45     result->value = buffer.substr(begin_value, vsize);
  46
  47     //printf("key: %s, value: %s\n\n", key.c_str(), result->value.c_str());
  48     return result;
  49 }
  50
  51 ConfigValue* ConfigSource::process_line_from_ascii_config(const string &buffer, ConfigCache *cache)
  52 {
  53     ConfigValue *result = process_line(buffer);
  54     if(result != NULL) {
  55         // Append the newly found value to the cache we were passed
  56         cache->replace_or_push_back(result);
  57         return result;
  58     }
  59     return NULL;
  60 }
  61
  62 string ConfigSource::process_line_from_ascii_config(const string &buffer, uint16_t line_checksums[3])
  63 {
  64     string value= "";
  65     ConfigValue *result = process_line(buffer);
  66     if(result != NULL) {
  67         if(result->check_sums[0] == line_checksums[0] && result->check_sums[1] == line_checksums[1] && result->check_sums[2] == line_checksums[2]) {
  68             value= result->value;
  69         }
  70         delete result;
  71     }
  72     return value;
  73 }