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comparison: ucx/cx/printf.h

ucx/cx/printf.h

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1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2021 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 */
28 /**
29 * \file printf.h
30 * \brief Wrapper for write functions with a printf-like interface.
31 * \author Mike Becker
32 * \author Olaf Wintermann
33 * \copyright 2-Clause BSD License
34 */
35
36 #ifndef UCX_PRINTF_H
37 #define UCX_PRINTF_H
38
39 #include "common.h"
40 #include "string.h"
41 #include <stdarg.h>
42
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46
47
48 /**
49 * The maximum string length that fits into stack memory.
50 */
51 extern unsigned const cx_printf_sbo_size;
52
53 /**
54 * A \c fprintf like function which writes the output to a stream by
55 * using a write_func.
56 *
57 * @param stream the stream the data is written to
58 * @param wfc the write function
59 * @param fmt format string
60 * @param ... additional arguments
61 * @return the total number of bytes written
62 */
63 __attribute__((__nonnull__(1, 2, 3), __format__(printf, 3, 4)))
64 int cx_fprintf(
65 void *stream,
66 cx_write_func wfc,
67 char const *fmt,
68 ...
69 );
70
71 /**
72 * A \c vfprintf like function which writes the output to a stream by
73 * using a write_func.
74 *
75 * @param stream the stream the data is written to
76 * @param wfc the write function
77 * @param fmt format string
78 * @param ap argument list
79 * @return the total number of bytes written
80 * @see cx_fprintf()
81 */
82 __attribute__((__nonnull__))
83 int cx_vfprintf(
84 void *stream,
85 cx_write_func wfc,
86 char const *fmt,
87 va_list ap
88 );
89
90 /**
91 * A \c asprintf like function which allocates space for a string
92 * the result is written to.
93 *
94 * \note The resulting string is guaranteed to be zero-terminated.
95 *
96 * @param allocator the CxAllocator used for allocating the string
97 * @param fmt format string
98 * @param ... additional arguments
99 * @return the formatted string
100 * @see cx_strfree_a()
101 */
102 __attribute__((__nonnull__(1, 2), __format__(printf, 2, 3)))
103 cxmutstr cx_asprintf_a(
104 CxAllocator const *allocator,
105 char const *fmt,
106 ...
107 );
108
109 /**
110 * A \c asprintf like function which allocates space for a string
111 * the result is written to.
112 *
113 * \note The resulting string is guaranteed to be zero-terminated.
114 *
115 * @param fmt format string
116 * @param ... additional arguments
117 * @return the formatted string
118 * @see cx_strfree()
119 */
120 #define cx_asprintf(fmt, ...) \
121 cx_asprintf_a(cxDefaultAllocator, fmt, __VA_ARGS__)
122
123 /**
124 * A \c vasprintf like function which allocates space for a string
125 * the result is written to.
126 *
127 * \note The resulting string is guaranteed to be zero-terminated.
128 *
129 * @param allocator the CxAllocator used for allocating the string
130 * @param fmt format string
131 * @param ap argument list
132 * @return the formatted string
133 * @see cx_asprintf_a()
134 */
135 __attribute__((__nonnull__))
136 cxmutstr cx_vasprintf_a(
137 CxAllocator const *allocator,
138 char const *fmt,
139 va_list ap
140 );
141
142 /**
143 * A \c vasprintf like function which allocates space for a string
144 * the result is written to.
145 *
146 * \note The resulting string is guaranteed to be zero-terminated.
147 *
148 * @param fmt format string
149 * @param ap argument list
150 * @return the formatted string
151 * @see cx_asprintf()
152 */
153 #define cx_vasprintf(fmt, ap) cx_vasprintf_a(cxDefaultAllocator, fmt, ap)
154
155 /**
156 * A \c printf like function which writes the output to a CxBuffer.
157 *
158 * @param buffer a pointer to the buffer the data is written to
159 * @param fmt the format string
160 * @param ... additional arguments
161 * @return the total number of bytes written
162 * @see ucx_fprintf()
163 */
164 #define cx_bprintf(buffer, fmt, ...) cx_fprintf((CxBuffer*)buffer, \
165 (cx_write_func) cxBufferWrite, fmt, __VA_ARGS__)
166
167
168 /**
169 * An \c sprintf like function which reallocates the string when the buffer is not large enough.
170 *
171 * The size of the buffer will be updated in \p len when necessary.
172 *
173 * \note The resulting string is guaranteed to be zero-terminated.
174 *
175 * @param str a pointer to the string buffer
176 * @param len a pointer to the length of the buffer
177 * @param fmt the format string
178 * @param ... additional arguments
179 * @return the length of produced string
180 */
181 #define cx_sprintf(str, len, fmt, ...) cx_sprintf_a(cxDefaultAllocator, str, len, fmt, __VA_ARGS__)
182
183 /**
184 * An \c sprintf like function which reallocates the string when the buffer is not large enough.
185 *
186 * The size of the buffer will be updated in \p len when necessary.
187 *
188 * \note The resulting string is guaranteed to be zero-terminated.
189 *
190 * \attention The original buffer MUST have been allocated with the same allocator!
191 *
192 * @param alloc the allocator to use
193 * @param str a pointer to the string buffer
194 * @param len a pointer to the length of the buffer
195 * @param fmt the format string
196 * @param ... additional arguments
197 * @return the length of produced string
198 */
199 __attribute__((__nonnull__(1, 2, 3, 4), __format__(printf, 4, 5)))
200 int cx_sprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, ... );
201
202
203 /**
204 * An \c sprintf like function which reallocates the string when the buffer is not large enough.
205 *
206 * The size of the buffer will be updated in \p len when necessary.
207 *
208 * \note The resulting string is guaranteed to be zero-terminated.
209 *
210 * @param str a pointer to the string buffer
211 * @param len a pointer to the length of the buffer
212 * @param fmt the format string
213 * @param ap argument list
214 * @return the length of produced string
215 */
216 #define cx_vsprintf(str, len, fmt, ap) cx_vsprintf_a(cxDefaultAllocator, str, len, fmt, ap)
217
218 /**
219 * An \c sprintf like function which reallocates the string when the buffer is not large enough.
220 *
221 * The size of the buffer will be updated in \p len when necessary.
222 *
223 * \note The resulting string is guaranteed to be zero-terminated.
224 *
225 * \attention The original buffer MUST have been allocated with the same allocator!
226 *
227 * @param alloc the allocator to use
228 * @param str a pointer to the string buffer
229 * @param len a pointer to the length of the buffer
230 * @param fmt the format string
231 * @param ap argument list
232 * @return the length of produced string
233 */
234 __attribute__((__nonnull__))
235 int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, va_list ap);
236
237
238 /**
239 * An \c sprintf like function which allocates a new string when the buffer is not large enough.
240 *
241 * The size of the buffer will be updated in \p len when necessary.
242 *
243 * The location of the resulting string will \em always be stored to \p str. When the buffer
244 * was sufficiently large, \p buf itself will be stored to the location of \p str.
245 *
246 * \note The resulting string is guaranteed to be zero-terminated.
247 *
248 * \remark When a new string needed to be allocated, the contents of \p buf will be
249 * poisoned after the call, because this function tries to produce the string in \p buf, first.
250 *
251 * @param buf a pointer to the buffer
252 * @param len a pointer to the length of the buffer
253 * @param str a pointer to the location
254 * @param fmt the format string
255 * @param ... additional arguments
256 * @return the length of produced string
257 */
258 #define cx_sprintf_s(buf, len, str, fmt, ...) cx_sprintf_sa(cxDefaultAllocator, buf, len, str, fmt, __VA_ARGS__)
259
260 /**
261 * An \c sprintf like function which allocates a new string when the buffer is not large enough.
262 *
263 * The size of the buffer will be updated in \p len when necessary.
264 *
265 * The location of the resulting string will \em always be stored to \p str. When the buffer
266 * was sufficiently large, \p buf itself will be stored to the location of \p str.
267 *
268 * \note The resulting string is guaranteed to be zero-terminated.
269 *
270 * \remark When a new string needed to be allocated, the contents of \p buf will be
271 * poisoned after the call, because this function tries to produce the string in \p buf, first.
272 *
273 * @param alloc the allocator to use
274 * @param buf a pointer to the buffer
275 * @param len a pointer to the length of the buffer
276 * @param str a pointer to the location
277 * @param fmt the format string
278 * @param ... additional arguments
279 * @return the length of produced string
280 */
281 __attribute__((__nonnull__(1, 2, 4, 5), __format__(printf, 5, 6)))
282 int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, ... );
283
284 /**
285 * An \c sprintf like function which allocates a new string when the buffer is not large enough.
286 *
287 * The size of the buffer will be updated in \p len when necessary.
288 *
289 * The location of the resulting string will \em always be stored to \p str. When the buffer
290 * was sufficiently large, \p buf itself will be stored to the location of \p str.
291 *
292 * \note The resulting string is guaranteed to be zero-terminated.
293 *
294 * \remark When a new string needed to be allocated, the contents of \p buf will be
295 * poisoned after the call, because this function tries to produce the string in \p buf, first.
296 *
297 * @param buf a pointer to the buffer
298 * @param len a pointer to the length of the buffer
299 * @param str a pointer to the location
300 * @param fmt the format string
301 * @param ap argument list
302 * @return the length of produced string
303 */
304 #define cx_vsprintf_s(buf, len, str, fmt, ap) cx_vsprintf_sa(cxDefaultAllocator, buf, len, str, fmt, ap)
305
306 /**
307 * An \c sprintf like function which allocates a new string when the buffer is not large enough.
308 *
309 * The size of the buffer will be updated in \p len when necessary.
310 *
311 * The location of the resulting string will \em always be stored to \p str. When the buffer
312 * was sufficiently large, \p buf itself will be stored to the location of \p str.
313 *
314 * \note The resulting string is guaranteed to be zero-terminated.
315 *
316 * \remark When a new string needed to be allocated, the contents of \p buf will be
317 * poisoned after the call, because this function tries to produce the string in \p buf, first.
318 *
319 * @param alloc the allocator to use
320 * @param buf a pointer to the buffer
321 * @param len a pointer to the length of the buffer
322 * @param str a pointer to the location
323 * @param fmt the format string
324 * @param ap argument list
325 * @return the length of produced string
326 */
327 __attribute__((__nonnull__))
328 int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, va_list ap);
329
330
331 #ifdef __cplusplus
332 } // extern "C"
333 #endif
334
335 #endif //UCX_PRINTF_H

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