libwreport 3.38
varinfo.h
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1#ifndef WREPORT_VARINFO_H
2#define WREPORT_VARINFO_H
3
4#include <cstdint>
5#include <string>
6#include <iosfwd>
7#include <wreport/fwd.h>
8
9namespace wreport {
10
59typedef uint16_t Varcode;
60
62std::string varcode_format(Varcode code);
63
67#define WR_VAR(f, x, y) (static_cast<wreport::Varcode>( (static_cast<unsigned>(f)<<14) | (static_cast<unsigned>(x)<<8) | static_cast<unsigned>(y) ))
68
75#define WR_STRING_TO_VAR(str) static_cast<wreport::Varcode>( \
76 (( ((str)[0] - '0')*10 + ((str)[1] - '0') ) << 8) | \
77 ( ((str)[2] - '0')*100 + ((str)[3] - '0')*10 + ((str)[4] - '0') ) \
78)
79
81#define WR_VAR_F(code) (((code) >> 14) & 0x3)
82
84#define WR_VAR_X(code) ((code) >> 8 & 0x3f)
85
87#define WR_VAR_Y(code) ((code) & 0xff)
88
96#define WR_VAR_FXY(code) WR_VAR_F(code), WR_VAR_X(code), WR_VAR_Y(code)
97
108Varcode varcode_parse(const char* desc);
109
110
112enum class Vartype : unsigned
113{
114 // Integer value
115 Integer,
116 // Floating point value
117 Decimal,
118 // String value
119 String,
120 // Opaque binary value
121 Binary,
122};
123
124
126const char* vartype_format(Vartype type);
127
129Vartype vartype_parse(const char* s);
130
131std::ostream& operator<<(std::ostream& out, const Vartype& t);
132
139{
142
145
147 char desc[64];
148
151 char unit[24];
152
159 int scale;
160
162 unsigned len;
163
171
173 unsigned bit_len;
174
176 int imin;
177
179 int imax;
180
182 double dmin;
183
185 double dmax;
186
196 int encode_decimal(double fval) const;
197
201 double round_decimal(double val) const;
202
212 uint32_t encode_binary(double fval) const;
213
223 double decode_decimal(int val) const;
224
234 double decode_binary(uint32_t val) const;
235
238 const char* desc,
239 const char* unit,
240 int scale=0, unsigned len=0,
241 int bit_ref=0, int bit_len=0);
242
245 const char* desc,
246 const char* unit,
247 int scale=0, unsigned len=0);
248
256 void set_string(Varcode code, const char* desc, unsigned len);
257
265 void set_binary(Varcode code, const char* desc, unsigned bit_len);
266
273};
274
275
284typedef const _Varinfo* Varinfo;
285
286}
287#endif
String functions.
Definition benchmark.h:13
Vartype vartype_parse(const char *s)
Return a Vartype from its string description.
Vartype
Variable type.
Definition varinfo.h:113
std::string varcode_format(Varcode code)
Format a varcode into a string.
const char * vartype_format(Vartype type)
Return a string description of a Vartype.
const _Varinfo * Varinfo
Varinfo reference.
Definition fwd.h:11
Varcode varcode_parse(const char *desc)
Convert a FXXYYY string descriptor code into its short integer representation.
uint16_t Varcode
Holds the WMO variable code of a variable.
Definition fwd.h:12
Information about a variable.
Definition varinfo.h:139
double decode_decimal(int val) const
Decode a double value from a decimal integer value using Varinfo decimal encoding informations (scale...
double round_decimal(double val) const
Round val so that it only fits the significant digits given in scale.
int imin
Minimum unscaled decimal integer value the field can have.
Definition varinfo.h:176
Varcode code
Variable code, as in WMO BUFR/CREX table B.
Definition varinfo.h:141
char unit[24]
Measurement unit of the variable, using the units defined in WMO BUFR/CREX table B.
Definition varinfo.h:151
unsigned len
Length in digits of the variable encoded as a decimal integer.
Definition varinfo.h:162
double dmin
Minimum value the field can have.
Definition varinfo.h:182
int bit_ref
Binary reference value for the variable.
Definition varinfo.h:170
int scale
Scale of the variable, defining its decimal precision.
Definition varinfo.h:159
unsigned bit_len
Length in bits of the variable when encoded as an unsigned binary value.
Definition varinfo.h:173
int imax
Minimum unscaled decimal integer value the field can have.
Definition varinfo.h:179
double decode_binary(uint32_t val) const
Decode a double value from a decimal integer value using Varinfo binary encoding informations (bit_re...
char desc[64]
Freeform variable description.
Definition varinfo.h:147
void set_crex(Varcode code, const char *desc, const char *unit, int scale=0, unsigned len=0)
Set all the base Varinfo fields, then call compute_range.
void compute_range()
Compute the widest ranges for imin, imax, dmin and dmax that can fit any value that can be encoded bo...
double dmax
Maximum value the field can have.
Definition varinfo.h:185
uint32_t encode_binary(double fval) const
Encode a double value into a positive integer value using Varinfo binary encoding informations (bit_r...
void set_string(Varcode code, const char *desc, unsigned len)
Set all the fields to represent a string variable.
int encode_decimal(double fval) const
Encode a double value into a decimal integer value using Varinfo decimal encoding informations (scale...
Vartype type
Type of the value stored in the variable.
Definition varinfo.h:144
void set_binary(Varcode code, const char *desc, unsigned bit_len)
Set all the fields to represent an opaque binary variable.
void set_bufr(Varcode code, const char *desc, const char *unit, int scale=0, unsigned len=0, int bit_ref=0, int bit_len=0)
Set all the base Varinfo fields, then call compute_range.