gd_add_spec(3) GETDATA gd_add_spec(3)NAME
gd_add_spec, gd_madd_spec — add a field to a dirfile
SYNOPSIS
#include <getdata.h>
int gd_add_spec(DIRFILE *dirfile, const char *line, int
fragment_index);
int gd_madd_spec(DIRFILE *dirfile, const char *line, const char
*parent);
DESCRIPTION
The gd_add_spec() function adds the field described by the field speci‐
fication line in line to the dirfile specified by dirfile. The
gd_madd_spec() function behaves similarly, but adds the field as a
metafield under the field indicated by the field parent. Field speci‐
fication lines are described in detail in dirfile-format(5). Since
Standards Version 7 (see dirfile(5)) permits specifying metafield with‐
out the use of the /META directive, gd_add_spec() may also be used to
add metafields, by specifying the metafield's full field code. See
dirfile-format(5) for full details.
When using gd_madd_spec(), line should only contain a field specifica‐
tion, and not a /META directive.
Passing these functions a directive line instead of a field specifica‐
tion line will result in a syntax error. These functions never call
the registered parser callback function, even if line contains a syntax
error.
RETURN VALUE
On success, gd_add_spec() and gd_madd_spec() return 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 parent field code was not found, or was already a
metafield.
GD_E_BAD_DIRFILE
The supplied dirfile was invalid.
GD_E_BAD_INDEX
The fragment_index argument was out of range.
GD_E_FORMAT
A syntax error was encountered in line.
GD_E_LINE_TOO_LONG
The supplied line was longer than the parser was able to deal
with. Lines are limited by the storage size of ssize_t. On
32-bit systems, this limits line to 2**31 bytes. The limit is
larger on 64-bit systems.
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 indicated format specification frag‐
ment 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 indicated format specification frag‐
ment does not support creating an empty binary file to be asso‐
ciated with a newly added RAW field.
The dirfile error may be retrieved by calling gd_error(3). A descrip‐
tive error string for the last error encountered can be obtained from a
call to gd_error_string(3).
SEE ALSOgd_add(3), gd_add_bit(3), gd_add_carray(3), gd_add_const(3), gd_add_di‐
vide(3), gd_add_lincom(3), gd_add_linterp(3), gd_add_multiply(3),
gd_add_phase(3), gd_add_recip(3), gd_add_raw(3), gd_error(3), gd_er‐
ror_string(3), gd_madd(3), gd_madd_bit(3), gd_madd_carray(3),
gd_madd_const(3), gd_madd_divide(3), gd_madd_lincom(3), gd_madd_lin‐
terp(3), gd_madd_multiply(3), gd_madd_phase(3), gd_madd_polynom(3),
gd_madd_recip(3), gd_madd_string(3), gd_metaflush(3), gd_open(3),
dirfile-format(5)Version 0.7.0 4 November 2010 gd_add_spec(3)
