Drizzled Public API Documentation

memc_decrement.cc
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31 
32 #include <config.h>
33 #include <drizzled/function/str/strfunc.h>
34 
35 #include "memcached_functions.h"
36 #include "memc_decrement.h"
37 
38 #include <libmemcached/memcached.h>
39 
40 #include <string>
41 
42 using namespace std;
43 using namespace drizzled;
44 
46 {
47  memcached_return rc;
48  uint32_t offset;
49  uint64_t value;
50  size_t val_len;
51  char tmp_buff[32]= "";
52  String *key;
53  String *dec_str;
54  null_value= false;
55 
56  if ((arg_count != 1 && arg_count != 2) ||
57  ! (key= args[0]->val_str(str)) ||
58  ! memc)
59  {
60  return &failure_buff;
61  }
62 
63  if (arg_count == 2) {
64  dec_str= args[1]->val_str(str);
65  offset= static_cast<uint32_t>(atoi(dec_str->c_ptr()));
66  }
67  else
68  {
69  offset= 1;
70  }
71 
72  rc= memcached_decrement(memc,
73  key->c_ptr(),
74  key->length(),
75  offset,
76  &value);
77 
78  snprintf(tmp_buff, 32, "%"PRIu64, value);
79  val_len= strlen(tmp_buff);
80 
81  if (rc != MEMCACHED_SUCCESS)
82  {
83  return &failure_buff;
84  }
85 
86  buffer.realloc(val_len);
87  buffer.length(val_len);
88  memcpy(buffer.ptr(), tmp_buff, val_len);
89 
90  return &buffer;
91 }
92