1 /*****************************************************************************
2 * RRDtool 1.4.8 Copyright by Tobi Oetiker, 1997-2013
3 *****************************************************************************
4 * rrd_format.c RRD Database Format helper functions
5 *****************************************************************************
6 * $Id$
7 * $Log$
8 * Revision 1.5 2004/05/18 18:53:03 oetiker
9 * big spell checking patch -- slif@bellsouth.net
10 *
11 * Revision 1.4 2003/02/13 07:05:27 oetiker
12 * Find attached the patch I promised to send to you. Please note that there
13 * are three new source files (src/rrd_is_thread_safe.h, src/rrd_thread_safe.c
14 * and src/rrd_not_thread_safe.c) and the introduction of librrd_th. This
15 * library is identical to librrd, but it contains support code for per-thread
16 * global variables currently used for error information only. This is similar
17 * to how errno per-thread variables are implemented. librrd_th must be linked
18 * alongside of libpthred
19 *
20 * There is also a new file "THREADS", holding some documentation.
21 *
22 * -- Peter Stamfest <peter@stamfest.at>
23 *
24 * Revision 1.3 2002/02/01 20:34:49 oetiker
25 * fixed version number and date/time
26 *
27 * Revision 1.2 2001/03/10 23:54:39 oetiker
28 * Support for COMPUTE data sources (CDEF data sources). Removes the RPN
29 * parser and calculator from rrd_graph and puts then in a new file,
30 * rrd_rpncalc.c. Changes to core files rrd_create and rrd_update. Some
31 * clean-up of aberrant behavior stuff, including a bug fix.
32 * Documentation update (rrdcreate.pod, rrdupdate.pod). Change xml format.
33 * -- Jake Brutlag <jakeb@corp.webtv.net>
34 *
35 * Revision 1.1.1.1 2001/02/25 22:25:05 oetiker
36 * checkin
37 *
38 * Revision 1.3 1998/03/08 12:35:11 oetiker
39 * checkpointing things because the current setup seems to work
40 * according to the things said in the manpages
41 *
42 * Revision 1.2 1998/02/26 22:58:22 oetiker
43 * fixed define
44 *
45 * Revision 1.1 1998/02/21 16:14:41 oetiker
46 * Initial revision
47 *
48 *
49 *****************************************************************************/
50 #include "rrd_tool.h"
51 #ifdef WIN32
52 #include "stdlib.h"
53 #endif
55 #define converter(VV,VVV) \
56 if (strcmp(#VV, string) == 0) return VVV;
58 /* conversion functions to allow symbolic entry of enumerations */
59 enum dst_en dst_conv(
60 char *string)
61 {
62 converter(COUNTER, DST_COUNTER)
63 converter(ABSOLUTE, DST_ABSOLUTE)
64 converter(GAUGE, DST_GAUGE)
65 converter(DERIVE, DST_DERIVE)
66 converter(COMPUTE, DST_CDEF)
67 rrd_set_error("unknown data acquisition function '%s'", string);
68 return (enum dst_en)(-1);
69 }
72 enum cf_en cf_conv(
73 const char *string)
74 {
76 converter(AVERAGE, CF_AVERAGE)
77 converter(MIN, CF_MINIMUM)
78 converter(MAX, CF_MAXIMUM)
79 converter(LAST, CF_LAST)
80 converter(HWPREDICT, CF_HWPREDICT)
81 converter(MHWPREDICT, CF_MHWPREDICT)
82 converter(DEVPREDICT, CF_DEVPREDICT)
83 converter(SEASONAL, CF_SEASONAL)
84 converter(DEVSEASONAL, CF_DEVSEASONAL)
85 converter(FAILURES, CF_FAILURES)
86 rrd_set_error("unknown consolidation function '%s'", string);
87 return (enum cf_en)(-1);
88 }
90 #undef converter
92 long ds_match(
93 rrd_t *rrd,
94 char *ds_nam)
95 {
96 unsigned long i;
98 for (i = 0; i < rrd->stat_head->ds_cnt; i++)
99 if ((strcmp(ds_nam, rrd->ds_def[i].ds_nam)) == 0)
100 return i;
101 rrd_set_error("unknown data source name '%s'", ds_nam);
102 return -1;
103 }
105 off_t rrd_get_header_size(
106 rrd_t *rrd)
107 {
108 return sizeof(stat_head_t) + \
109 sizeof(ds_def_t) * rrd->stat_head->ds_cnt + \
110 sizeof(rra_def_t) * rrd->stat_head->rra_cnt + \
111 ( atoi(rrd->stat_head->version) < 3 ? sizeof(time_t) : sizeof(live_head_t) ) + \
112 sizeof(pdp_prep_t) * rrd->stat_head->ds_cnt + \
113 sizeof(cdp_prep_t) * rrd->stat_head->ds_cnt * rrd->stat_head->rra_cnt + \
114 sizeof(rra_ptr_t) * rrd->stat_head->rra_cnt;
115 }