Annotation of libelwix/src/elwix.c, revision 1.10
1.1 misho 1: /*************************************************************************
2: * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
1.10 ! misho 6: * $Id: elwix.c,v 1.9.56.2 2022/09/26 18:55:51 misho Exp $
1.1 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:
1.10 ! misho 15: Copyright 2004 - 2022
1.1 misho 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:
48:
49: int elwix_Debug;
50: int elwix_Verbose;
51:
52:
53: /* Memory management */
54:
55: void *(*e_malloc)(size_t) = malloc;
56: void *(*e_calloc)(size_t, size_t) = calloc;
57: void *(*e_realloc)(void*, size_t) = realloc;
58: char *(*e_strdup)(const char*) = strdup;
59: void (*e_free)(void*) = free;
60:
61:
62: #pragma GCC visibility push(hidden)
63:
64: int use_mm;
65: const char elwix_Prog[STRSIZ];
66:
67: int elwix_Errno;
68: char elwix_Error[STRSIZ];
69:
70: #pragma GCC visibility pop
71:
72:
73: // elwix_SetProg() Set program memory pool name
1.2 misho 74: void
1.1 misho 75: elwix_SetProg(const char *csProgName)
76: {
77: strlcpy((char*) elwix_Prog, csProgName, sizeof elwix_Prog);
78: }
79:
80: // elwix_GetProg() Get program memory pool name
1.2 misho 81: const char *
1.1 misho 82: elwix_GetProg()
83: {
84: return elwix_Prog;
85: }
86:
87: // elwix_GetErrno() Get error code of last operation
1.2 misho 88: int
1.1 misho 89: elwix_GetErrno()
90: {
91: return elwix_Errno;
92: }
93:
94: // elwix_GetError() Get error text of last operation
1.2 misho 95: const char *
1.1 misho 96: elwix_GetError()
97: {
98: return elwix_Error;
99: }
100:
101: // elwix_SetErr() Set error to variables for internal use!!!
1.2 misho 102: void
1.1 misho 103: elwix_SetErr(int eno, char *estr, ...)
104: {
105: va_list lst;
106:
107: elwix_Errno = eno;
108: memset(elwix_Error, 0, sizeof elwix_Error);
109: va_start(lst, estr);
110: vsnprintf(elwix_Error, sizeof elwix_Error, estr, lst);
111: va_end(lst);
112: }
113:
114: // elwix_mm_inuse() Check for memory management model
1.2 misho 115: int
1.1 misho 116: elwix_mm_inuse()
117: {
118: return use_mm & ELWIX_MPOOL;
119: }
120:
121:
1.5 misho 122: #pragma GCC visibility push(hidden)
1.1 misho 123: // init libelwix routine
1.5 misho 124: __attribute__((constructor)) static void
1.1 misho 125: _elwix_init()
126: {
1.6 misho 127: elwixInit(MEMMGR, 0);
1.1 misho 128: }
129:
130: // fini libelwix routine
1.5 misho 131: __attribute__((destructor)) static void
1.1 misho 132: _elwix_fini()
133: {
134: elwixFini();
135: }
136:
137: /*
138: * elwixInit() - Init libelwix library memory management
139: *
140: * @mm = memory management (ELWIX_SYSM or ELWIX_MPOOL)
141: * @maxmem = memory limit
142: * return: -1 error or !=-1 used memory management model
143: */
144: int
145: elwixInit(int mm, u_long maxmem)
146: {
147: switch (mm) {
148: case ELWIX_MPOOL: /* mpool */
149: elwix_mpool = mpool_init(maxmem);
150: if (elwix_mpool) {
151: e_malloc = mpool_xmalloc;
152: e_calloc = mpool_xcalloc;
153: e_realloc = mpool_xrealloc;
154: e_strdup = mpool_xstrdup;
155: e_free = mpool_xfree;
156: break;
157: } else {
158: mm = ELWIX_SYSM;
159: #undef USE_MPOOL
160: }
161: case ELWIX_SYSM: /* system */
162: e_malloc = malloc;
163: e_calloc = calloc;
164: e_realloc = realloc;
165: e_strdup = strdup;
166: e_free = free;
167: break;
168: default: /* not supported */
169: elwix_SetErr(EINVAL, "Not supported memory management");
170: return -1;
171: }
172:
173: return (use_mm = mm);
174: }
175:
176: /*
1.4 misho 177: * elwixFini() - Finish libelwix library memory management
1.1 misho 178: *
179: * return: none
180: */
181: void
182: elwixFini()
183: {
184: switch (use_mm) {
185: case ELWIX_MPOOL:
186: e_malloc = malloc;
187: e_calloc = calloc;
188: e_realloc = realloc;
189: e_strdup = strdup;
190: e_free = free;
191: use_mm = ELWIX_SYSM;
192:
193: mpool_destroy(&elwix_mpool);
194: break;
195: }
196: }
1.5 misho 197: #pragma GCC visibility pop
1.4 misho 198:
199: /*
200: * elwix_byteOrder() - Detect platform byte order
201: *
202: * return: 1 = little endian or 0 big endian
203: */
204: int
205: elwix_byteOrder()
206: {
207: int x = 1;
208:
209: return *(char*) &x;
210: }
1.8 misho 211:
1.10 ! misho 212: #ifndef HAVE_STRLCPY
1.8 misho 213: /*
214: * Copy src to string dst of size siz. At most siz-1 characters
215: * will be copied. Always NUL terminates (unless siz == 0).
216: * Returns strlen(src); if retval >= siz, truncation occurred.
217: */
218: size_t
219: strlcpy(char *dst, const char *src, size_t siz)
220: {
221: char *d = dst;
222: const char *s = src;
223: register size_t n = siz;
224:
225: /* Copy as many bytes as will fit */
226: if (n)
227: while (--n)
228: if ((*d++ = *s++) == '\0')
229: break;
230:
231: /* Not enough room in dst, add NUL and traverse rest of src */
232: if (!n) {
233: if (siz)
234: *d = '\0'; /* NUL-terminate dst */
235: while (*s++);
236: }
237:
238: return (s - src - 1); /* count does not include NUL */
239: }
240: #endif
241:
242: #ifndef strlcat
243: /*
244: * Appends src to string dst of size siz (unlike strncat, siz is the
245: * full size of dst, not space left). At most siz-1 characters
246: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
247: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
248: * If retval >= siz, truncation occurred.
249: */
250: size_t
251: strlcat(char *dst, const char *src, size_t siz)
252: {
253: char *d = dst;
254: const char *s = src;
255: register size_t n = siz;
256: size_t dlen;
257:
258: /* Find the end of dst and adjust bytes left but don't go past end */
259: while (n-- && *d != '\0')
260: d++;
261:
262: dlen = d - dst;
263: n = siz - dlen;
264: if (!n)
265: return (dlen + strlen(s));
266:
267: while (*s != '\0') {
268: if (n != 1) {
269: *d++ = *s;
270: n--;
271: }
272: s++;
273: }
274: *d = '\0';
275:
276: return (dlen + (s - src)); /* count does not include NUL */
277: }
278: #endif
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