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Diffstat (limited to 'omapip/array.c')
| -rw-r--r-- | omapip/array.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/omapip/array.c b/omapip/array.c new file mode 100644 index 0000000..0a3ac61 --- /dev/null +++ b/omapip/array.c @@ -0,0 +1,162 @@ +/* listener.c + + Subroutines that support the omapi extensible array type. */ + +/* + * Copyright (c) 2004-2007,2009 by Internet Systems Consortium, Inc. ("ISC") + * Copyright (c) 2001-2003 by Internet Software Consortium + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Internet Systems Consortium, Inc. + * 950 Charter Street + * Redwood City, CA 94063 + * <info@isc.org> + * https://www.isc.org/ + * + * This software has been written for Internet Systems Consortium + * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc. + * To learn more about Internet Systems Consortium, see + * ``https://www.isc.org/''. To learn more about Vixie Enterprises, + * see ``http://www.vix.com''. To learn more about Nominum, Inc., see + * ``http://www.nominum.com''. + */ + +#include "dhcpd.h" + +#include <omapip/omapip_p.h> + +/* Allocate a new extensible array. */ + +isc_result_t omapi_array_allocate (omapi_array_t **array, + omapi_array_ref_t ref, + omapi_array_deref_t deref, + const char *file, int line) +{ + omapi_array_t *aptr; + + if (!array || *array) + return DHCP_R_INVALIDARG; + aptr = dmalloc (sizeof (omapi_array_t),file, line); + if (!aptr) + return ISC_R_NOMEMORY; + *array = aptr; + aptr -> ref = ref; + aptr -> deref = deref; + return ISC_R_SUCCESS; +} + +isc_result_t omapi_array_free (omapi_array_t **array, + const char *file, int line) +{ + omapi_array_t *aptr; + int i; + + if (!array || !*array) + return DHCP_R_INVALIDARG; + aptr = *array; + for (i = 0; i < aptr -> count; i++) + if (aptr -> data [i] && aptr -> deref) + (*aptr -> deref) (&aptr -> data [i], file, line); + dfree (aptr -> data, MDL); + dfree (aptr, MDL); + *array = (omapi_array_t *)0; + return ISC_R_SUCCESS; +} + +/* Extend the size of the array by one entry (we may allocate more than that) + and store the specified value in the new array element. */ + +isc_result_t omapi_array_extend (omapi_array_t *array, char *ptr, + int *index, const char *file, int line) +{ + isc_result_t status; + int new = array -> count; + status = omapi_array_set (array, ptr, new, file, line); + if (index && status == ISC_R_SUCCESS) + *index = new; + return status; +} + +/* Set a value in the specified array, extending it if necessary. */ + +isc_result_t omapi_array_set (omapi_array_t *array, void *ptr, int index, + const char *file, int line) +{ + char **newbuf; + int delta; + isc_result_t status; + + if (!array) + return DHCP_R_INVALIDARG; + if (!ptr) + return DHCP_R_INVALIDARG; + if (index < 0) + return DHCP_R_INVALIDARG; + + /* If the proposed index is larger than the current available + space in the array, make more space in the array. */ + if (array -> max <= index) { + delta = index - array -> max + 10; + newbuf = dmalloc ((array -> max + delta) * sizeof (char *), + file, line); + if (!newbuf) + return ISC_R_NOMEMORY; + /* Zero the new elements. */ + memset (&newbuf [array -> max], 0, (sizeof (char *)) * delta); + array -> max += delta; + /* Copy the old array data into the new buffer. */ + if (array -> data) { + memcpy (newbuf, + array -> data, array -> count * sizeof (char *)); + dfree (array -> data, file, line); + } + array -> data = newbuf; + } else { + /* If there's already data there, and this is an array + of references, dereference what's there. */ + if (array -> data [index]) { + status = ((*array -> deref) (&array -> data [index], + file, line)); + + if (status != ISC_R_SUCCESS) + return status; + } + } + + /* Store the pointer using the referencer function. We have + either just memset this to zero or dereferenced what was + there previously, so there is no need to do anything if the + pointer we have been asked to store is null. */ + if (ptr) { + status = (*array -> ref) (&array -> data [index], ptr, + file, line); + if (status != ISC_R_SUCCESS) + return status; + } + if (index >= array -> count) + array -> count = index + 1; + return ISC_R_SUCCESS; +} + +isc_result_t omapi_array_lookup (char **ptr, omapi_array_t *array, int index, + const char *file, int line) +{ + if (!array || !ptr || *ptr || index < 0 || index >= array -> count) + return DHCP_R_INVALIDARG; + if (array -> data [index]) + return (*array -> ref) (ptr, + array -> data [index], file, line); + return ISC_R_NOTFOUND; +} + |