Wed, 09 May 2018 20:15:10 +0200
adds new shift operations for UcxBuffer (including tests and a usage example in modules.md)
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
29 #include "ucx/utils.h"
31 #include <math.h>
32 #include <stdio.h>
33 #include <limits.h>
34 #include <errno.h>
36 /* COPY FUCNTIONS */
37 void* ucx_strcpy(const void* s, void* data) {
38 const char *str = (const char*) s;
39 size_t n = 1+strlen(str);
40 char *cpy = (char*) malloc(n);
41 memcpy(cpy, str, n);
42 return cpy;
43 }
45 void* ucx_memcpy(const void* m, void* n) {
46 size_t k = *((size_t*)n);
47 void *cpy = malloc(k);
48 memcpy(cpy, m, k);
49 return cpy;
50 }
52 size_t ucx_stream_bncopy(void *src, void *dest, read_func readfnc,
53 write_func writefnc, char* buf, size_t bufsize, size_t n) {
54 if(n == 0 || bufsize == 0) {
55 return 0;
56 }
58 char *lbuf;
59 size_t ncp = 0;
61 if(buf) {
62 lbuf = buf;
63 } else {
64 lbuf = (char*)malloc(bufsize);
65 if(lbuf == NULL) {
66 return 0;
67 }
68 }
70 size_t r;
71 size_t rn = bufsize > n ? n : bufsize;
72 while((r = readfnc(lbuf, 1, rn, src)) != 0) {
73 r = writefnc(lbuf, 1, r, dest);
74 ncp += r;
75 n -= r;
76 rn = bufsize > n ? n : bufsize;
77 if(r == 0 || n == 0) {
78 break;
79 }
80 }
82 if (lbuf != buf) {
83 free(lbuf);
84 }
86 return ncp;
87 }
89 /* COMPARE FUNCTIONS */
91 int ucx_strcmp(const void *s1, const void *s2, void *data) {
92 return strcmp((const char*)s1, (const char*)s2);
93 }
95 int ucx_strncmp(const void *s1, const void *s2, void *n) {
96 return strncmp((const char*)s1, (const char*)s2, *((size_t*) n));
97 }
99 int ucx_intcmp(const void *i1, const void *i2, void *data) {
100 int a = *((const int*) i1);
101 int b = *((const int*) i2);
102 if (a == b) {
103 return 0;
104 } else {
105 return a < b ? -1 : 1;
106 }
107 }
109 int ucx_longintcmp(const void *i1, const void *i2, void *data) {
110 int a = *((const long int*) i1);
111 int b = *((const long int*) i2);
112 if (a == b) {
113 return 0;
114 } else {
115 return a < b ? -1 : 1;
116 }
117 }
119 intmax_t ucx_intdist(const void *i1, const void *i2, void *data) {
120 intmax_t a = *((const int*) i1);
121 intmax_t b = *((const int*) i2);
122 return a - b;
123 }
125 intmax_t ucx_longintdist(const void *i1, const void *i2, void *data) {
126 intmax_t a = *((const long int*) i1);
127 intmax_t b = *((const long int*) i2);
128 return a - b;
129 }
131 int ucx_floatcmp(const void *f1, const void *f2, void *epsilon) {
132 float a = *((const float*) f1);
133 float b = *((const float*) f2);
134 float e = !epsilon ? 1e-6f : *((float*)epsilon);
135 if (fabsf(a - b) < e) {
136 return 0;
137 } else {
138 return a < b ? -1 : 1;
139 }
140 }
142 int ucx_doublecmp(const void *d1, const void *d2, void *epsilon) {
143 double a = *((const double*) d1);
144 double b = *((const double*) d2);
145 double e = !epsilon ? 1e-14 : *((double*)epsilon);
146 if (fabs(a - b) < e) {
147 return 0;
148 } else {
149 return a < b ? -1 : 1;
150 }
151 }
153 int ucx_ptrcmp(const void *ptr1, const void *ptr2, void *data) {
154 const intptr_t p1 = (const intptr_t) ptr1;
155 const intptr_t p2 = (const intptr_t) ptr2;
156 if (p1 == p2) {
157 return 0;
158 } else {
159 return p1 < p2 ? -1 : 1;
160 }
161 }
163 int ucx_memcmp(const void *ptr1, const void *ptr2, void *n) {
164 return memcmp(ptr1, ptr2, *((size_t*)n));
165 }
167 /* PRINTF FUNCTIONS */
169 #ifdef va_copy
170 #define UCX_PRINTF_BUFSIZE 256
171 #else
172 #pragma message("WARNING: C99 va_copy macro not supported by this platform" \
173 " - limiting ucx_*printf to 2 KiB")
174 #define UCX_PRINTF_BUFSIZE 0x800
175 #endif
177 int ucx_fprintf(void *stream, write_func wfc, const char *fmt, ...) {
178 int ret;
179 va_list ap;
180 va_start(ap, fmt);
181 ret = ucx_vfprintf(stream, wfc, fmt, ap);
182 va_end(ap);
183 return ret;
184 }
186 int ucx_vfprintf(void *stream, write_func wfc, const char *fmt, va_list ap) {
187 char buf[UCX_PRINTF_BUFSIZE];
188 #ifdef va_copy
189 va_list ap2;
190 va_copy(ap2, ap);
191 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
192 if (ret < 0) {
193 return ret;
194 } else if (ret < UCX_PRINTF_BUFSIZE) {
195 return (int)wfc(buf, 1, ret, stream);
196 } else {
197 if (ret == INT_MAX) {
198 errno = ENOMEM;
199 return -1;
200 }
202 int len = ret + 1;
203 char *newbuf = (char*)malloc(len);
204 if (!newbuf) {
205 return -1;
206 }
208 ret = vsnprintf(newbuf, len, fmt, ap2);
209 if (ret > 0) {
210 ret = (int)wfc(newbuf, 1, ret, stream);
211 }
212 free(newbuf);
213 }
214 return ret;
215 #else
216 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
217 if (ret < 0) {
218 return ret;
219 } else if (ret < UCX_PRINTF_BUFSIZE) {
220 return (int)wfc(buf, 1, ret, stream);
221 } else {
222 errno = ENOMEM;
223 return -1;
224 }
225 #endif
226 }
228 sstr_t ucx_asprintf(UcxAllocator *allocator, const char *fmt, ...) {
229 va_list ap;
230 sstr_t ret;
231 va_start(ap, fmt);
232 ret = ucx_vasprintf(allocator, fmt, ap);
233 va_end(ap);
234 return ret;
235 }
237 sstr_t ucx_vasprintf(UcxAllocator *a, const char *fmt, va_list ap) {
238 sstr_t s;
239 s.ptr = NULL;
240 s.length = 0;
241 char buf[UCX_PRINTF_BUFSIZE];
242 #ifdef va_copy
243 va_list ap2;
244 va_copy(ap2, ap);
245 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
246 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {
247 s.ptr = (char*)almalloc(a, ret + 1);
248 if (s.ptr) {
249 s.length = (size_t)ret;
250 memcpy(s.ptr, buf, ret);
251 s.ptr[s.length] = '\0';
252 }
253 } else if (ret == INT_MAX) {
254 errno = ENOMEM;
255 } else {
256 int len = ret + 1;
257 s.ptr = (char*)almalloc(a, len);
258 if (s.ptr) {
259 ret = vsnprintf(s.ptr, len, fmt, ap2);
260 if (ret < 0) {
261 free(s.ptr);
262 s.ptr = NULL;
263 } else {
264 s.length = (size_t)ret;
265 }
266 }
267 }
268 #else
269 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
270 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {
271 s.ptr = (char*)almalloc(a, ret + 1);
272 if (s.ptr) {
273 s.length = (size_t)ret;
274 memcpy(s.ptr, buf, ret);
275 s.ptr[s.length] = '\0';
276 }
277 } else {
278 errno = ENOMEM;
279 }
280 #endif
281 return s;
282 }