Annotation of libelwix/src/iov.c, revision 1.1.2.2
1.1.2.1 misho 1: /*************************************************************************
2: * (C) 2021 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
1.1.2.2 ! misho 6: * $Id: iov.c,v 1.1.2.1 2021/03/18 13:57:21 misho Exp $
1.1.2.1 misho 7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004 - 2021
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47:
1.1.2.2 ! misho 48:
! 49: /*
! 50: * iov_Init() - Init new iovec array
! 51: *
! 52: * return: =NULL error, !=NULL ready array
! 53: */
! 54: iovec_t *
! 55: iov_Init()
! 56: {
! 57: iovec_t *iov;
! 58:
! 59: iov = e_malloc(sizeof(iovec_t));
! 60: if (iov)
! 61: memset(iov, 0, sizeof(iovec_t));
! 62:
! 63: return iov;
! 64: }
! 65:
! 66: /*
! 67: * iov_Destroy() - Destroy iovec array
! 68: *
! 69: * @iov = iovec array
! 70: * return: none
! 71: */
! 72: void
! 73: iov_Destroy(iovec_t ** __restrict iov)
! 74: {
! 75: if (iov && *iov) {
! 76: if ((*iov)->iov_array)
! 77: e_free((*iov)->iov_array);
! 78: e_free((*iov));
! 79: *iov = NULL;
! 80: }
! 81: }
! 82:
! 83: /*
! 84: * iov_Get() - Get data and length from position
! 85: *
! 86: * @iov = iovec array
! 87: * @pos = position
! 88: * @data = data
! 89: * @datlen = data length
! 90: * return: -1 error, 0 ok
! 91: */
! 92: int
! 93: iov_Get(iovec_t * __restrict iov, u_int pos, void **data, size_t *datlen)
! 94: {
! 95: if (!iov || !data || !datlen)
! 96: return -1;
! 97:
! 98: if (pos >= iov->iov_size)
! 99: return -1;
! 100:
! 101: *datlen = MIN(*datlen, iov->iov_array[pos].iov_len);
! 102: memcpy(*data, iov->iov_array[pos].iov_base, *datlen);
! 103:
! 104: return 0;
! 105: }
! 106:
! 107: /*
! 108: * iov_Insert() - Insert data at position into array
! 109: *
! 110: * @iov = iovec array
! 111: * @pos = position
! 112: * @data = data
! 113: * @datlen = data length
! 114: * return: -1 error, 0 ok
! 115: */
! 116: int
! 117: iov_Insert(iovec_t * __restrict iov, u_int pos, void *data, size_t datlen)
! 118: {
! 119: struct iovec *iv;
! 120:
! 121: if (!iov)
! 122: return -1;
! 123:
! 124: if (pos >= iov->iov_size) {
! 125: iv = e_realloc(iov->iov_array, sizeof(struct iovec) * (pos + 1));
! 126: if (!iv)
! 127: return -1;
! 128:
! 129: iov->iov_array = iv;
! 130: iov->iov_size = pos + 1;
! 131: }
! 132:
! 133: iov->iov_array[pos].iov_base = data;
! 134: iov->iov_array[pos].iov_len = datlen;
! 135:
! 136: return 0;
! 137: }
! 138:
! 139: /*
! 140: * iov_Delete() - Delete data at position into array
! 141: *
! 142: * @iov = iovec array
! 143: * @pos = position
! 144: * @mustfree = data must be free before delete
! 145: * return: -1 error, 0 ok
! 146: */
! 147: int
! 148: iov_Delete(iovec_t * __restrict iov, u_int pos, int mustfree)
! 149: {
! 150: if (!iov)
! 151: return -1;
! 152:
! 153: if (pos < iov->iov_size) {
! 154: if (mustfree)
! 155: e_free(iov->iov_array[pos].iov_base);
! 156: memset(iov->iov_array + pos, 0, sizeof(struct iovec));
! 157: }
! 158:
! 159: return 0;
! 160: }
! 161:
! 162: /*
! 163: * iov_Push() - Push data on first free position
! 164: *
! 165: * @iov = iovec array
! 166: * @data = data
! 167: * @datlen = data length
! 168: * return: -1 error, !=-1 pushed at position
! 169: */
! 170: int
! 171: iov_Push(iovec_t * __restrict iov, void *data, size_t datlen)
! 172: {
! 173: register int pos;
! 174:
! 175: if (!iov)
! 176: return -1;
! 177:
! 178: for (pos = 0; pos < iov->iov_size; pos++)
! 179: if (!iov->iov_array[pos].iov_len && !iov->iov_array[pos].iov_base)
! 180: break;
! 181:
! 182: if (iov_Insert(iov, pos, data, datlen))
! 183: return -1;
! 184:
! 185: return (int) pos;
! 186: }
! 187:
! 188: /*
! 189: * iov_Pop() - Pop data from last used position
! 190: *
! 191: * @iov = iovec array
! 192: * @data = data
! 193: * @datlen = data length
! 194: * @mustfree = data must be free before delete
! 195: * return: -1 error, !=-1 poped from position
! 196: */
! 197: int
! 198: iov_Pop(iovec_t * __restrict iov, void **data, size_t *datlen, int mustfree)
! 199: {
! 200: register int pos;
! 201:
! 202: if (!iov)
! 203: return -1;
! 204:
! 205: for (pos = iov->iov_size - 1; pos >= 0; pos--)
! 206: if (iov->iov_array[pos].iov_base)
! 207: break;
! 208:
! 209: iov_Get(iov, pos, data, datlen);
! 210: iov_Delete(iov, pos, mustfree);
! 211: return (int) pos;
! 212: }
! 213:
! 214: /*
! 215: * iov_PushPair() - Push pair/named data on first free position
! 216: *
! 217: * @iov = iovec array
! 218: * @name = name of data
! 219: * @data = data
! 220: * @datlen = data length
! 221: * return: -1 error, !=-1 pushed at position
! 222: */
! 223: int
! 224: iov_PushPair(iovec_t * __restrict iov, const char *name, void *data, size_t datlen)
! 225: {
! 226: char *str;
! 227: int pos;
! 228:
! 229: if (!iov)
! 230: return -1;
! 231:
! 232: str = e_strdup(name);
! 233: if (!str)
! 234: return -1;
! 235: if (datlen == (size_t) -1) {
! 236: if (data)
! 237: datlen = strlen(data) + 1;
! 238: else
! 239: datlen = 0;
! 240: }
! 241:
! 242: if ((pos = iov_Push(iov, str, strlen(str) + 1)) == -1) {
! 243: e_free(str);
! 244: return -1;
! 245: }
! 246: if (iov_Push(iov, data, datlen) == -1) {
! 247: iov_Delete(iov, pos, 42);
! 248: return -1;
! 249: }
! 250:
! 251: return pos;
! 252: }
! 253:
! 254: /*
! 255: * iov_PopPair() - Pop pair/named data from last used position
! 256: *
! 257: * @iov = iovec array
! 258: * @name = name of data
! 259: * @namlen = name length
! 260: * @data = data
! 261: * @datlen = data length
! 262: * @mustfree = data must be free before delete
! 263: * return: -1 error, !=-1 poped from position
! 264: */
! 265: int
! 266: iov_PopPair(iovec_t * __restrict iov, char **name, size_t *namlen, void **data, size_t *datlen)
! 267: {
! 268: int pos;
! 269:
! 270: if (!iov)
! 271: return -1;
! 272:
! 273: if (iov_Pop(iov, data, datlen, 0) == -1)
! 274: return -1;
! 275: if ((pos = iov_Pop(iov, (void**) name, namlen, 42)) == -1)
! 276: return -1;
! 277:
! 278: return pos;
! 279: }
! 280:
! 281: /*
! 282: * iov_Debug() - Debug of iovec array
! 283: *
! 284: * @iov = iovec array
! 285: * return: none
! 286: */
! 287: void
! 288: iov_Debug(iovec_t * __restrict iov)
! 289: {
! 290: register size_t pos;
! 291:
! 292: if (!iov)
! 293: return;
! 294:
! 295: for (pos = 0; pos < iov->iov_size; pos++)
! 296: printf("IOVEC[%zu] base=%p len=%zu (%s)\n", pos, iov->iov_array[pos].iov_base,
! 297: iov->iov_array[pos].iov_len, (char*) iov->iov_array[pos].iov_base);
! 298: }
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