DWARF_HASATTR(3)

DWARF_HASATTR(3) | Library Functions Manual | DWARF_HASATTR(3)

# NAME

`dwarf_hasattr` —
check for the presence of an attribute

# LIBRARY

DWARF Access Library (libdwarf, -ldwarf)

# SYNOPSIS

`#include <libdwarf.h>`

int
`dwarf_hasattr`(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret_bool, Dwarf_Error *err);

# DESCRIPTION

Function `dwarf_hasattr`() tests whether the debugging information entry referenced in argument die contains the attribute named by argument attr. Legal values for argument attr are those denoted by the `DW_AT_*` constants in the DWARF specification.

If the named attribute is present in the debugging information entry, function `dwarf_hasattr`() returns a non-zero value in the location pointed to by argument ret_bool. If the named attribute is not present, a zero is written instead.

If argument err is not `NULL`, it will be used to return an error descriptor in case of an error.

# RETURN VALUES

On success, function `dwarf_hasattr`() returns `DW_DLV_OK`. In case of an error, it returns `DW_DLV_ERROR` and sets argument err.

# ERRORS

Function `dwarf_hasattr`() can fail with the following error:

[`DW_DLE_ARGUMENT`]
  Either of argument die or ret_bool was `NULL`.

# SEE ALSO

dwarf(3), dwarf_attr(3), dwarf_whatattr(3)

April 17, 2010 | NetBSD 10.1