dirfile_add_lincom (3) - Linux Man Pages

dirfile_add_lincom: add a field to a dirfile

NAME

dirfile_add_bit, dirfile_add_clincom, dirfile_add_const, dirfile_add_cpolynom, dirfile_add_lincom, dirfile_add_linterp, dirfile_add_multiply, dirfile_add_phase, dirfile_add_polynom, dirfile_add_raw, dirfile_add_sbit, dirfile_add_string --- add a field to a dirfile

SYNOPSIS

#include <getdata.h>
int dirfile_add_bit(DIRFILE *dirfile, const char *field_name, const char *in_field, gd_bit_t bitnum, gd_bit_t numbits, int fragment_index);
int dirfile_add_clincom(DIRFILE *dirfile, const char *field_name, int n_fields, const char **in_fields, const double complex *cm, const double complex *cb, int fragment_index);
int dirfile_add_const(DIRFILE *dirfile, const char *field_name, gd_type_t const_type, gd_type_t data_type, void *value, int fragment_index);
int dirfile_add_cpolynom(DIRFILE *dirfile, const char *field_name, int poly_ord, const char *in_fields, const double complex *ca, int fragment_index );
int dirfile_add_lincom(DIRFILE *dirfile, const char *field_name, int n_fields, const char **in_fields, const double *m, const double *b, int fragment_index);
int dirfile_add_linterp(DIRFILE *dirfile, const char *field_name, const char *in_field, const char *table, int fragment_index);
int dirfile_add_multiply(DIRFILE *dirfile, const char *field_name, const char *in_field1, const char *in_field2, int fragment_index);
int dirfile_add_phase(DIRFILE *dirfile, const char *field_name, const char *in_field, gd_shift_t shift, int fragment_index);
int dirfile_add_polynom(DIRFILE *dirfile, const char *field_name, int poly_ord, const char *in_fields, const double *a, int fragment_index );
int dirfile_add_raw(DIRFILE *dirfile, const char *field_name, gd_type_t data_type, gd_spf_t spf, int fragment_index);
int dirfile_add_sbit(DIRFILE *dirfile, const char *field_name, const char *in_field, gd_bit_t bitnum, gd_bit_t numbits, int fragment_index);
int dirfile_add_string(DIRFILE *dirfile, const char *field_name, const char *value, int fragment_index);

DESCRIPTION

These functions provide alternatives to using the dirfile_add(3) function to add a new field of the indicated type to the dirfile specified by dirfile. In all of these calls, field_name indicates the name of the field to be added. Further, fragment_index is the index of the format file fragment into which the field should be added. (To convert a fragment index to its file name, see get_fragmentname(3).) The meaning and valid types of other arguments may be obtained from the get_entry(3) and dirfile-format(5) manual pages.

The dirfile_add_clincom() and dirfile_add_cpolynom() functions are identical to dirfile_add_lincom() and dirfile_add_polynom(), except they take complex scalar parameters, instead of purely real values.

The dirfile_add_lincom() and dirfile_add_clincom() functions takes pointers to three arrays of length n_fields containing the input field names (in_fields), the gain factors (m or cm), and the offset terms (b or cb). Similarly, dirfile_add_polynom() and dirfile_add_cpolynom() take an array of length poly_ord + 1 containing the polynomial co-efficients (a or ca).

The dirfile_add_string() and dirfile_add_const() functions both add the field and set the value of the field to value. For dirfile_add_const(), the const_type argument specifies the storage type for the const, while data_type specifies the data type of the value pointed to by value.

The gd_bit_t type is a signed 16-bit integer type. The gd_shift_t type is a signed 64-bit integer type. The gd_spf_t type is an unsigned 16-bit integer type.

All fields added with this interface must contain numerical parameters. Fields with CONST fields as parameters cannot be added with these functions. Those fields must be added with dirfile_add(3) or dirfile_add_spec(3).

See NOTES below for information on using dirfile_add_clincom() and dirfile_add_cpolynom() in the C89 GetData API.

RETURN VALUE

On success, any of these functions returns zero. On error, -1 is returned and the dirfile error is set to a non-zero error value. Possible error values are:
GD_E_ACCMODE
The specified dirfile was opened read-only.
GD_E_ALLOC
The library was unable to allocate memory.
GD_E_BAD_CODE
The field_name argument contained invalid characters.
GD_E_BAD_DIRFILE
The supplied dirfile was invalid.
GD_E_BAD_ENTRY
One or more of the field parameters specified was invalid.
GD_E_BAD_INDEX
The fragment_index argument was out of range.
GD_E_BAD_TYPE
The data_type or const_type argument provided to dirfile_add_raw() or dirfile_add_const(), was invalid.
GD_E_DUPLICATE
The field_name provided duplicated that of an already existing field.
GD_E_PROTECTED
The metadata of the fragment was protected from change. Or, the creation of a RAW field was attempted and the data of the fragment was protected.
GD_E_RAW_IO
An I/O error occurred while creating an empty binary file to be associated with a newly added RAW field.
GD_E_UNKNOWN_ENCODING
The encoding scheme of the specified format file fragment is not known to the library. As a result, the library was unable to create an empty binary file to be associated with a newly added RAW field.
GD_E_UNSUPPORTED
The encoding scheme of the specified format file fragment does not support creating an empty binary file to be associated with a newly added RAW field. The dirfile error may be retrieved by calling get_error(3). A descriptive error string for the last error encountered can be obtained from a call to get_error_string(3).

NOTES

The C89 GetData API provides different prototypes for dirfile_add_clincom() and dirfile_add_cpolynom():
#define GETDATA_C89_API
#include <getdata.h>
int dirfile_add_clincom(DIRFILE *dirfile, const char *field_name, int n_fields, const char **in_fields, const double *cm, const double *cb, int fragment_index);
int dirfile_add_cpolynom(DIRFILE *dirfile, const char *field_name, int poly_ord, const char *in_fields, const double *ca, int fragment_index );
In this case, the array pointers passed as cm,~cb or ca should have twice as many (purely real) elements, consisting of alternating real and imaginary parts for the complex data. For example, ca[0] should be the real part of the first co-efficient, ca[1] the imaginary part of the first co-efficient, ca[2] the real part of the second co-efficient, ca[3] the imaginary part of the second co-efficient, and so on.

SEE ALSO

dirfile_add(3), dirfile_add_spec(3), dirfile_madd_bit(3), dirfile_madd_clincom(3), dirfile_madd_const(3), dirfile_madd_cpolynom(3), dirfile_madd_lincom(3), dirfile_madd_linterp(3), dirfile_madd_multiply(3), dirfile_madd_phase(3), dirfile_madd_polynom(3), dirfile_madd_sbit(3), dirfile_madd_string(3), dirfile_metaflush(3), dirfile_open(3), get_error(3), get_error_string(3), dirfile-format(5)