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101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
/*
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* Copyright 2008, 2009 University Corporation for Atmospheric Research
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*
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* This file is part of the UDUNITS-2 package. See the file LICENSE
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* in the top-level source-directory of the package for copying and
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* redistribution conditions.
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*/
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/*
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* Searchable unit-and-identifier tree.
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*/
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/*LINTLIBRARY*/
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#ifndef _XOPEN_SOURCE
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# define _XOPEN_SOURCE 500
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#endif
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "unitAndId.h"
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#include "udunits2.h"
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/*
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* Arguments:
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* unit The unit. May be freed upon return.
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* id The identifier (name or symbol). May be freed upon return.
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* Returns:
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* NULL Failure. "ut_get_status()" will be
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* UT_BAD_ARG "unit" or "id" is NULL.
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* UT_OS Operating-system failure. See "errno".
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* else Pointer to the new unit-and-identifier.
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*/
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UnitAndId*
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uaiNew(
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const ut_unit* const unit,
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const char* const id)
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{
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UnitAndId* entry = NULL; /* failure */
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if (id == NULL || unit == NULL) {
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ut_set_status(UT_BAD_ARG);
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ut_handle_error_message("uaiNew(): NULL argument");
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}
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else {
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entry = malloc(sizeof(UnitAndId));
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if (entry == NULL) {
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ut_set_status(UT_OS);
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ut_handle_error_message(strerror(errno));
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ut_handle_error_message("Couldn't allocate %lu-byte data-structure",
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sizeof(UnitAndId));
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}
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else {
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entry->id = strdup(id);
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if (entry->id == NULL) {
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ut_set_status(UT_OS);
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ut_handle_error_message(strerror(errno));
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ut_handle_error_message("Couldn't duplicate identifier");
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}
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else {
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entry->unit = ut_clone(unit);
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if (entry->unit == NULL) {
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assert(ut_get_status() != UT_SUCCESS);
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free(entry->id);
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}
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}
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if (ut_get_status() != UT_SUCCESS) {
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free(entry);
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entry = NULL;
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}
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}
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}
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return entry;
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}
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/*
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* Frees memory of a unit-and-identifier.
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*
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* Arguments:
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* entry Pointer to the unit-and-identifier or NULL.
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*/
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void
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uaiFree(
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UnitAndId* const entry)
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{
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if (entry != NULL) {
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free(entry->id);
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ut_free(entry->unit);
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free(entry);
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}
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}
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