gd_nmfields_by_type(3) GETDATA gd_nmfields_by_type(3)NAME
gd_nmfields_by_type -- report the number of fields of a given type in a dirfile
SYNOPSIS
#include <getdata.h>
unsigned int gd_nmfields_by_type(DIRFILE *dirfile, const char *parent, gd_entype_t type);
DESCRIPTION
The gd_nmfields_by_type() function queries a dirfile(5) database specified by dirfile and returns the number of metafields defined in the
database for the supplied parent field.
The dirfile argument must point to a valid DIRFILE object previously created by a call to gd_open(3). The type argument should be one of
the following symbols indicating the type of field to count:
GD_BIT_ENTRY, GD_CARRAY_ENTRY, GD_CONST_ENTRY, GD_DIVIDE_ENTRY, GD_INDEX_ENTRY, GD_LINCOM_ENTRY, GD_LINTERP_ENTRY,
GD_MULTIPLY_ENTRY, GD_PHASE_ENTRY, GD_POLYNOM_ENTRY, GD_RECIP_ENTRY, GD_SBIT_ENTRY, GD_STRING_ENTRY.
RETURN VALUE
Upon successful completion, gd_nmfields_by_type() returns the number of defined metafields for the given parent. On error, it returns zero
and sets the dirfile error to a non-zero error value. Possible error values are:
GD_E_BAD_CODE
The supplied parent field code was not found, or referred to a metafield itself.
GD_E_BAD_DIRFILE
The supplied dirfile was invalid.
The dirfile error may be retrieved by calling gd_error(3). A descriptive error string for the last error encountered can be obtained from
a call to gd_error_string(3).
SEE ALSO dirfile(5), gd_open(3), gd_error(3), gd_error_string(3), gd_mfield_list_by_type(3), gd_nmfields(3), gd_nfields_by_type(3)Version 0.7.0 3 November 2010 gd_nmfields_by_type(3)
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gd_mfield_list(3) GETDATA gd_mfield_list(3)NAME
gd_mfield_list -- retrieve a list of fields in a dirfile
SYNOPSIS
#include <getdata.h>
const char **gd_mfield_list(DIRFILE *dirfile, const char *parent);
DESCRIPTION
The gd_mfield_list() function queries a dirfile(5) database specified by dirfile and returns a read-only list of names of the all
metafields for the specified parent field in the database.
The dirfile argument must point to a valid DIRFILE object previously created by a call to gd_open(3).
The array returned will be de-allocated by a call to gd_close(3) and should not be de-allocated by the caller. The list returned should
not be assumed to be in any particular order. The array is terminated by a NULL pointer. The number of strings in the array can be ob-
tained from a call to gd_nmfields(3).
The caller may not modify any strings in the array, or the array itself. Doing so may cause database corruption. The pointer returned is
guaranteed to be valid until gd_mfield_list() is called again with the same arguments, or until the array is de-allocated by a call to
gd_close(3).
RETURN VALUE
Upon successful completion, gd_mfield_list() returns a pointer to an array of strings containing the names of all the metafields of the
given parent. On error it returns NULL and sets the dirfile error to a non-zero error value. Possible error values are:
GD_E_ALLOC
The library was unable to allocate memory.
GD_E_BAD_CODE
The supplied parent field code was not found, or referred to a metafield itself.
GD_E_BAD_DIRFILE
The supplied dirfile was invalid.
The dirfile error may be retrieved by calling gd_error(3). A descriptive error string for the last error encountered can be obtained from
a call to gd_error_string(3).
SEE ALSO dirfile(5), gd_open(3), gd_error(3), gd_error_string(3), gd_mfield_list_by_type(3), gd_mvector_list(3), gd_nfields(3)Version 0.7.0 15 October 2010 gd_mfield_list(3)
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