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gd_put_constant(3) | GETDATA | gd_put_constant(3) |
NAME¶
gd_put_constant — retrieve a scalar constant from a dirfile databaseSYNOPSIS¶
#include <getdata.h>int
gd_put_constant(DIRFILE *dirfile, const char
*field_code, gd_type_t data_type, const
void *data_in);
DESCRIPTION¶
The gd_put_constant() function queries a dirfile(5) database specified by dirfile and sets the CONST scalar field_code , which may not contain a representation suffix, to the value specified in data_in, which should be of the type indicated by data_type.- GD_UINT8
- unsigned 8-bit integer
- GD_INT8
- signed (two's complement) 8-bit integer
- GD_UINT16
- unsigned 16-bit integer
- GD_INT16
- signed (two's complement) 16-bit integer
- GD_UINT32
- unsigned 32-bit integer
- GD_INT32
- signed (two's complement) 32-bit integer
- GD_UINT64
- unsigned 64-bit integer
- GD_INT64
- signed (two's complement) 64-bit integer
- GD_FLOAT32 or GD_FLOAT
- IEEE-754 standard 32-bit single precision floating point number
- GD_FLOAT64 or GD_DOUBLE
- IEEE-754 standard 64-bit double precision floating point number
RETURN VALUE¶
On success, gd_put_constant() returns zero. On error, it returns -1 and sets the dirfile error to a non-zero value. Possible error values are:- GD_E_ACCMODE
- The specified dirfile was opened read-only.
- GD_E_BAD_CODE
- The field specified by field_code was not found in the database.
- GD_E_BAD_DIRFILE
- An invalid dirfile was supplied.
- GD_E_BAD_FIELD_TYPE
- The supplied field_code referred to a field of type other than CONST. The caller should use gd_putdata(3), gd_put_carray(3), or gd_put_string(3) instead.
- GD_E_BAD_REPR
- The representation suffix specified in field_code was not recognised.
- GD_E_BAD_TYPE
- An invalid data_type was specified.
- GD_E_INTERNAL_ERROR
- An internal error occurred in the library while trying to perform the task. This indicates a bug in the library. Please report the incident to the maintainer.
- GD_E_PROTECTED
- The fragment containing the constant was protected from change.
SEE ALSO¶
dirfile(5), gd_metaflush(3), gd_get_constant(3), gd_error(3), gd_error_string(3), gd_open(3), gd_put_carray(3), gd_put_string(3), gd_putdata(3)4 November 2010 | Version 0.7.0 |