Annotation of embedaddon/mpd/src/contrib/libpdel/structs/structs_generic.c, revision 1.1
1.1 ! misho 1:
! 2: /*
! 3: * Copyright (c) 2001-2002 Packet Design, LLC.
! 4: * All rights reserved.
! 5: *
! 6: * Subject to the following obligations and disclaimer of warranty,
! 7: * use and redistribution of this software, in source or object code
! 8: * forms, with or without modifications are expressly permitted by
! 9: * Packet Design; provided, however, that:
! 10: *
! 11: * (i) Any and all reproductions of the source or object code
! 12: * must include the copyright notice above and the following
! 13: * disclaimer of warranties; and
! 14: * (ii) No rights are granted, in any manner or form, to use
! 15: * Packet Design trademarks, including the mark "PACKET DESIGN"
! 16: * on advertising, endorsements, or otherwise except as such
! 17: * appears in the above copyright notice or in the software.
! 18: *
! 19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
! 20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
! 21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
! 22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
! 23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
! 24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
! 25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
! 26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
! 27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
! 28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
! 29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
! 30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
! 31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
! 32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
! 33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
! 35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
! 36: * THE POSSIBILITY OF SUCH DAMAGE.
! 37: *
! 38: * Author: Archie Cobbs <archie@freebsd.org>
! 39: */
! 40:
! 41: #include <sys/types.h>
! 42: #ifdef __linux__
! 43: #include <endian.h>
! 44: #else
! 45: #include <machine/endian.h>
! 46: #endif
! 47:
! 48: #include <stdio.h>
! 49: #include <stdlib.h>
! 50: #include <stdarg.h>
! 51: #include <string.h>
! 52: #include <errno.h>
! 53:
! 54: #include "structs/structs.h"
! 55: #include "structs/type/array.h"
! 56: #include "util/typed_mem.h"
! 57:
! 58: #ifndef BYTE_ORDER
! 59: #error BYTE_ORDER is undefined
! 60: #endif
! 61:
! 62: /*********************************************************************
! 63: GENERIC FUNCTIONS
! 64: *********************************************************************/
! 65:
! 66: int
! 67: structs_region_init(const struct structs_type *type, void *data)
! 68: {
! 69: memset(data, 0, type->size);
! 70: return (0);
! 71: }
! 72:
! 73: int
! 74: structs_region_copy(const struct structs_type *type, const void *from, void *to)
! 75: {
! 76: memcpy(to, from, type->size);
! 77: return (0);
! 78: }
! 79:
! 80: int
! 81: structs_region_equal(const struct structs_type *type,
! 82: const void *v1, const void *v2)
! 83: {
! 84: return (memcmp(v1, v2, type->size) == 0);
! 85: }
! 86:
! 87: int
! 88: structs_region_encode(const struct structs_type *type, const char *mtype,
! 89: struct structs_data *code, const void *data)
! 90: {
! 91: if ((code->data = MALLOC(mtype, type->size)) == NULL)
! 92: return (-1);
! 93: memcpy(code->data, data, type->size);
! 94: code->length = type->size;
! 95: return (0);
! 96: }
! 97:
! 98: int
! 99: structs_region_decode(const struct structs_type *type,
! 100: const u_char *code, size_t cmax, void *data, char *ebuf, size_t emax)
! 101: {
! 102: if (cmax < type->size) {
! 103: strlcpy(ebuf, "encoded data is truncated", emax);
! 104: errno = EINVAL;
! 105: return (-1);
! 106: }
! 107: memcpy(data, code, type->size);
! 108: return (type->size);
! 109: }
! 110:
! 111: int
! 112: structs_region_encode_netorder(const struct structs_type *type,
! 113: const char *mtype, struct structs_data *code, const void *data)
! 114: {
! 115: if (structs_region_encode(type, mtype, code, data) == -1)
! 116: return (-1);
! 117: #if BYTE_ORDER == LITTLE_ENDIAN
! 118: {
! 119: u_char temp;
! 120: u_int i;
! 121:
! 122: for (i = 0; i < code->length / 2; i++) {
! 123: temp = code->data[i];
! 124: code->data[i] = code->data[code->length - 1 - i];
! 125: code->data[code->length - 1 - i] = temp;
! 126: }
! 127: }
! 128: #endif
! 129: return (0);
! 130: }
! 131:
! 132: int
! 133: structs_region_decode_netorder(const struct structs_type *type,
! 134: const u_char *code, size_t cmax, void *data, char *ebuf, size_t emax)
! 135: {
! 136: #if BYTE_ORDER == LITTLE_ENDIAN
! 137: u_char buf[16];
! 138: u_char temp;
! 139: u_int i;
! 140:
! 141: if (type->size > sizeof(buf)) {
! 142: errno = ERANGE; /* XXX oops fixed buffer is too small */
! 143: return (-1);
! 144: }
! 145: if (cmax > type->size)
! 146: cmax = type->size;
! 147: memcpy(buf, code, cmax);
! 148: for (i = 0; i < type->size / 2; i++) {
! 149: temp = buf[i];
! 150: buf[i] = buf[type->size - 1 - i];
! 151: buf[type->size - 1 - i] = temp;
! 152: }
! 153: code = buf;
! 154: #endif
! 155: return (structs_region_decode(type, code, cmax, data, ebuf, emax));
! 156: }
! 157:
! 158: char *
! 159: structs_notsupp_ascify(const struct structs_type *type,
! 160: const char *mtype, const void *data)
! 161: {
! 162: errno = EOPNOTSUPP;
! 163: return (NULL);
! 164: }
! 165:
! 166: int
! 167: structs_notsupp_init(const struct structs_type *type, void *data)
! 168: {
! 169: errno = EOPNOTSUPP;
! 170: return (-1);
! 171: }
! 172:
! 173: int
! 174: structs_notsupp_copy(const struct structs_type *type,
! 175: const void *from, void *to)
! 176: {
! 177: errno = EOPNOTSUPP;
! 178: return (-1);
! 179: }
! 180:
! 181: int
! 182: structs_notsupp_equal(const struct structs_type *type,
! 183: const void *v1, const void *v2)
! 184: {
! 185: errno = EOPNOTSUPP;
! 186: return (-1);
! 187: }
! 188:
! 189:
! 190: int
! 191: structs_notsupp_binify(const struct structs_type *type,
! 192: const char *ascii, void *data, char *ebuf, size_t emax)
! 193: {
! 194: strlcpy(ebuf,
! 195: "parsing from ASCII is not supported by this structs type", emax);
! 196: errno = EOPNOTSUPP;
! 197: return (-1);
! 198: }
! 199:
! 200: int
! 201: structs_notsupp_encode(const struct structs_type *type, const char *mtype,
! 202: struct structs_data *code, const void *data)
! 203: {
! 204: errno = EOPNOTSUPP;
! 205: return (-1);
! 206: }
! 207:
! 208: int
! 209: structs_notsupp_decode(const struct structs_type *type,
! 210: const u_char *code, size_t cmax, void *data, char *ebuf, size_t emax)
! 211: {
! 212: strlcpy(ebuf,
! 213: "binary decoding is not supported by this structs type", emax);
! 214: errno = EOPNOTSUPP;
! 215: return (-1);
! 216: }
! 217:
! 218: void
! 219: structs_nothing_free(const struct structs_type *type, void *data)
! 220: {
! 221: return;
! 222: }
! 223:
! 224: int
! 225: structs_ascii_copy(const struct structs_type *type, const void *from, void *to)
! 226: {
! 227: char *ascii;
! 228: int rtn;
! 229:
! 230: if ((ascii = (*type->ascify)(type, TYPED_MEM_TEMP, from)) == NULL)
! 231: return (-1);
! 232: rtn = (*type->binify)(type, ascii, to, NULL, 0);
! 233: FREE(TYPED_MEM_TEMP, ascii);
! 234: return (rtn);
! 235: }
! 236:
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