1 | // lognestmonster Copyright (c) 2019 Joshua 'joshuas3' Stockin |
2 | // lognestmonster.h |
3 | // C header file for implementation of the lognestmonster logging library |
4 |
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5 | // <https://github.com/JoshuaS3/lognestmonster/>. |
6 |
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7 |
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8 | // This file is part of lognestmonster. |
9 |
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10 | // lognestmonster is free software: you can redistribute it and/or modify |
11 | // it under the terms of the GNU General Public License as published by |
12 | // the Free Software Foundation, either version 3 of the License, or |
13 | // (at your option) any later version. |
14 |
|
15 | // lognestmonster is distributed in the hope that it will be useful, |
16 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | // GNU General Public License for more details. |
19 |
|
20 | // You should have received a copy of the GNU General Public License |
21 | // along with lognestmonster. If not, see <https://www.gnu.org/licenses/>. |
22 |
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23 |
|
24 | // SEMANTICS |
25 | // internal definitions: lnm_lower_camel_case |
26 | // public definitions: lnmUpperCamelCase |
27 |
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28 |
|
29 | // Declarations |
30 | #ifndef LOGNESTMONSTER_H |
31 | #define LOGNESTMONSTER_H 1 |
32 |
|
33 | // stdc inclusions |
34 |
|
35 | #include <stdint.h> |
36 | #include <inttypes.h> |
37 | #include <stdio.h> |
38 | #include <stdlib.h> |
39 | #include <string.h> |
40 |
|
41 | // non-universal inclusions |
42 |
|
43 | #include <sys/time.h> |
44 |
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45 |
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46 | enum lnmVerbosityLevel {lnmInfo, lnmDebug, lnmVerbose, lnmVeryVerbose, lnmWarning, lnmError}; |
47 | typedef uint8_t * lnmItem; |
48 | typedef uint8_t * lnmQueue; |
49 |
|
50 | lnmQueue lnmQueueInit(char * name, char * out_path); |
51 | lnmQueue lnmQueueByName(char * name); |
52 | lnmItem lnmStatement(uint8_t verbosity, char * tag, char * message); |
53 | lnmItem lnmEvent(void); |
54 | void lnmEventPush(lnmItem event, lnmItem item); |
55 | void lnmEventPushS(lnmItem event, uint8_t verbosity, char * tag, char * message); |
56 | lnmItem lnmEventI(lnmItem item); |
57 | lnmItem lnmEventS(uint8_t verbosity, char * tag, char * message); |
58 |
|
59 | void lnm_debug_parse_item(); |
60 | void lnm_debug_parse_registry(); |
61 |
|
62 | #endif |
63 |
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64 |
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65 | #ifdef DEFINE_LOGNESTMONSTER // one-time definitions |
66 | |
67 |
|
68 | // Pushable structure |
69 |
|
70 | typedef struct { |
71 | uint32_t capacity; |
72 | uint32_t length; |
73 | lnmItem * pushed; |
74 | } lnm_pushable; |
75 |
|
76 | void lnm_pushable_realloc(lnm_pushable * pushable) { |
77 | if (pushable->length > pushable->capacity) { |
78 | if (pushable->capacity >= 4294967295) { |
79 | printf("lognestmonster (lnm_pushable_realloc): pushable reached max length of 2^32. exiting...\n"); |
80 | exit(1); |
81 | } |
82 | pushable->pushed = realloc(pushable->pushed, sizeof(lnmItem) * (pushable->capacity *= 2)); |
83 | } else if (pushable->length < (pushable->capacity / 2)) { |
84 | if (pushable->capacity > 8) { |
85 | pushable->pushed = realloc(pushable->pushed, sizeof(lnmItem) * (pushable->capacity /= 2)); |
86 | } |
87 | } |
88 | } |
89 |
|
90 | lnm_pushable * lnm_new_pushable() { |
91 | lnm_pushable * new_pushable = malloc(sizeof(lnm_pushable)); |
92 | new_pushable->capacity = 8; |
93 | new_pushable->length = 0; |
94 | new_pushable->pushed = malloc(sizeof(lnmItem)*new_pushable->capacity); |
95 | return new_pushable; |
96 | } |
97 |
|
98 | void lnm_pushable_push(lnm_pushable * pushable, lnmItem item) { |
99 | pushable->length++; |
100 | lnm_pushable_realloc(pushable); |
101 | pushable->pushed[pushable->length-1] = item; |
102 | } |
103 |
|
104 | int lnm_pushable_indexof(lnm_pushable * pushable, lnmItem item) { |
105 | int len = pushable->length; |
106 | for (int iter = 0; iter<len; iter++) { |
107 | if (item == pushable->pushed[iter]) return iter; |
108 | } |
109 | printf("lognestmonster (lnm_pushable_indexof): cannot find item in pushable. exiting...\n"); |
110 | exit(1); |
111 | } |
112 |
|
113 | void lnm_pushable_pop(lnm_pushable * pushable) { |
114 | pushable->length--; |
115 | lnm_pushable_realloc(pushable); |
116 | } |
117 |
|
118 | void lnm_pushable_remove(lnm_pushable * pushable, uint32_t index) { |
119 | if (index>=pushable->length) { |
120 | printf("lognestmonster (lnm_pushable_remove): attempt to remove index out of pushable bounds. exiting...\n"); |
121 | exit(1); |
122 | } |
123 | for (uint32_t iter = index; iter<pushable->length-1; iter++) { |
124 | pushable->pushed[iter] = pushable->pushed[iter+1]; |
125 | } |
126 | pushable->length--; |
127 | lnm_pushable_realloc(pushable); |
128 | } |
129 |
|
130 | void lnm_pushable_free(lnm_pushable * pushable) { |
131 | free(pushable->pushed); |
132 | free(pushable); |
133 | } |
134 |
|
135 |
|
136 | // Statement and event structure definitions |
137 |
|
138 | typedef struct { |
139 | uint8_t type:1; // Used internally; 0 = statement, 1 = event |
140 | uint8_t boolpushed:1; // whether or not this log item has been pushed |
141 | lnm_pushable * pushed; // array of memory locations for lnm_log_event and lnm_log_statement structs |
142 | } lnm_log_event; |
143 |
|
144 | typedef struct { |
145 | // word 1, 4 bytes data 4 bytes padding |
146 | uint8_t type:1; // Used internally; 0 = statement, 1 = event |
147 | uint8_t boolpushed:1; // whether or not this log item has been pushed |
148 | uint8_t verbosity:3; // lnmVerbosityLevel, 0-5 |
149 | uint8_t tag_size; // character length of the tag |
150 | uint16_t message_size; // character length of the message |
151 |
|
152 | // word 2, 8 bytes data |
153 | uint64_t timestamp; // 64-bit millisecond timestamp |
154 |
|
155 | // word 3, 8 bytes data |
156 | char * log; // tag string + message string |
157 | } lnm_log_statement; |
158 |
|
159 |
|
160 | // Queue structure definition |
161 |
|
162 | typedef struct { |
163 | char * name; |
164 | char * out_path; |
165 | uint64_t timestamp; |
166 | lnm_pushable * pushed; |
167 | } lnm_queue; |
168 |
|
169 |
|
170 | // Library utilities |
171 |
|
172 | unsigned long lnm_getus(void) { |
173 | struct timeval current_time; |
174 | gettimeofday(¤t_time, NULL); |
175 | unsigned long ms = (current_time.tv_sec*1000000+current_time.tv_usec); |
176 | return ms; |
177 | } |
178 |
|
179 | unsigned long lnm_getms(void) { |
180 | return lnm_getus()/1000; |
181 | } |
182 |
|
183 |
|
184 | int lnm_isstatement(lnmItem item) { |
185 | lnm_log_statement * s = (lnm_log_statement *)item; |
186 | return !s->type; |
187 | } |
188 |
|
189 |
|
190 | // Item registry utils |
191 |
|
192 | static lnm_pushable * lnm_registered_queues; |
193 | static lnm_pushable * lnm_registered_items; |
194 | static int lnm_registry_update_count; |
195 |
|
196 | void lnm_registry_update(void) { // scan each registered item |
197 | for (uint32_t iter = 0; iter < lnm_registered_items->length; iter++) { |
198 | lnm_log_statement * s = (lnm_log_statement *)lnm_registered_items->pushed[iter]; |
199 | if (s->boolpushed == 1) { // if the registered item has been pushed elsewhere, remove it from the top level of the registry |
200 | lnm_registry_update_count++; |
201 | lnm_pushable_remove(lnm_registered_items, iter); |
202 | iter--; |
203 | } |
204 | } |
205 | } |
206 |
|
207 |
|
208 | // Core library |
209 |
|
210 | void lnm_free_item(lnmItem item) { // i'm so sorry |
211 | lnm_log_statement * item_cast = (lnm_log_statement *)item; |
212 | if (item_cast->boolpushed == 0) { // flush item out of registry |
213 | item_cast->boolpushed = 1; |
214 | lnm_registry_update(); |
215 | } |
216 | if (item_cast->type == 0) { |
217 | free(item_cast->log); |
218 | free(item_cast); |
219 | } else if (item_cast->type == 1) { |
220 | lnm_log_event * event_cast = (lnm_log_event *)item_cast; |
221 |
|
222 | lnm_pushable * breadcrumb = lnm_new_pushable(); |
223 | lnm_pushable_push(breadcrumb, (lnmItem)event_cast); // add event_cast as the first step down the breadcrumb |
224 | while (breadcrumb->length > 0) { // while there are items still in the breadcrumb |
225 | lnm_log_statement * breadcrumb_item = (lnm_log_statement *)breadcrumb->pushed[breadcrumb->length-1]; // fetch the last (deepest) item |
226 | if (breadcrumb_item->type == 0) { // the item is a statement |
227 | lnm_pushable_pop(breadcrumb); // remove it from the breadcrumb |
228 | free(breadcrumb_item->log); // and free it |
229 | free(breadcrumb_item); |
230 | } else if (breadcrumb_item->type == 1) { |
231 | lnm_log_event * breadcrumb_item_cast = (lnm_log_event *)breadcrumb_item; // item is an event, cast pointer |
232 | if (breadcrumb_item_cast->pushed->length > 0) { // if the event is not empty |
233 | lnm_pushable_push(breadcrumb, breadcrumb_item_cast->pushed->pushed[breadcrumb_item_cast->pushed->length-1]); // push the last item of event into the breadcrumb |
234 | lnm_pushable_pop(breadcrumb_item_cast->pushed); // and remove it from this event's index |
235 | // there is now a new breadcrumb navigation layer. loop back to check the new item... |
236 | } else { |
237 | lnm_pushable_pop(breadcrumb); // event is finally empty, remove it from the breadcrumb and free it |
238 | lnm_pushable_free(breadcrumb_item_cast->pushed); |
239 | free(breadcrumb_item_cast); |
240 | } |
241 | } |
242 | } |
243 | } else { |
244 | printf("lognestmonster (lnm_free_item): non-log item passed to function. exiting...\n"); |
245 | exit(1); |
246 | } |
247 | } |
248 |
|
249 | void lnm_free_registry() { |
250 | for (uint32_t iter = 0; iter < lnm_registered_items->length; iter++) { |
251 | lnm_free_item(lnm_registered_items->pushed[iter]); |
252 | } |
253 | } |
254 |
|
255 |
|
256 | lnmQueue lnmQueueInit(char * name, char * out_path) { |
257 | if (lnm_registered_queues == NULL) { |
258 | lnm_registered_queues = lnm_new_pushable(); |
259 | } |
260 | if (lnm_registered_items == NULL) { |
261 | lnm_registered_items = lnm_new_pushable(); |
262 | } |
263 |
|
264 | lnm_queue * new_queue = malloc(sizeof(lnm_queue)); |
265 | new_queue->name = malloc(strlen(name)+1); |
266 | new_queue->out_path = malloc(strlen(out_path)+1); |
267 | strcpy(new_queue->name, name); |
268 | strcpy(new_queue->out_path, out_path); |
269 | new_queue->pushed = lnm_new_pushable(); |
270 |
|
271 | lnm_pushable_push(lnm_registered_queues, (lnmQueue)new_queue); |
272 | return (lnmQueue)new_queue; |
273 | } |
274 |
|
275 | lnmQueue lnmQueueByName(char * name) { |
276 | if (lnm_registered_queues == NULL) { |
277 | printf("lognestmonster (lnmQueueByName): queue registry is nonexistant. exiting...\n"); |
278 | exit(1); |
279 | } |
280 | if (lnm_registered_queues->length == 0) { |
281 | printf("lognestmonster (lnmQueueByName): queue registry is empty. exiting...\n"); |
282 | exit(1); |
283 | } |
284 | for (uint32_t iter = 0; iter<lnm_registered_queues->length; iter++) { |
285 | lnm_queue * iterqueue = (lnm_queue *)lnm_registered_queues->pushed[iter]; |
286 | if (strcmp(iterqueue->name, name)==0) { |
287 | return (lnmQueue)iterqueue; |
288 | } |
289 | } |
290 | printf("lognestmonster (lnmQueueByName): queue not found in registry. exiting...\n"); |
291 | exit(1); |
292 | } |
293 |
|
294 |
|
295 | lnmItem lnmStatement(uint8_t verbosity, char * tag, char * message) { |
296 | lnm_log_statement * new_statement = malloc(sizeof(lnm_log_statement)); |
297 | new_statement->type = 0; |
298 | new_statement->verbosity = verbosity; |
299 | new_statement->timestamp = lnm_getus(); |
300 | int tlen = strlen(tag); |
301 | if (tlen > 256 || tlen < 0) { |
302 | printf("lognestmonster (lnmStatement): tag length %i is longer than the cap 256 characters. exiting...\n", tlen); |
303 | exit(1); |
304 | } |
305 | int mlen = strlen(message); |
306 | if (mlen > 65536 || mlen < 0) { |
307 | printf("lognestmonster (lnmStatement): message length %i is longer than the cap 65536 characters. exiting...\n", mlen); |
308 | exit(1); |
309 | } |
310 | new_statement->tag_size = tlen; |
311 | new_statement->message_size = mlen; |
312 | new_statement->log = malloc(tlen+mlen+1); |
313 | strcpy(new_statement->log, tag); |
314 | strcat(new_statement->log, message); |
315 | lnm_registry_update(); |
316 | lnm_pushable_push(lnm_registered_items, (lnmItem)new_statement); |
317 | return (lnmItem)new_statement; |
318 | } |
319 |
|
320 |
|
321 | lnmItem lnmEvent(void) { |
322 | lnm_log_event * new_event = malloc(sizeof(lnm_log_event)); |
323 | new_event->type = 1; |
324 | new_event->pushed = lnm_new_pushable(); |
325 | lnm_registry_update(); |
326 | lnm_pushable_push(lnm_registered_items, (lnmItem)new_event); |
327 | return (lnmItem)new_event; |
328 | } |
329 |
|
330 | void lnmEventPush(lnmItem event, lnmItem item) { |
331 | if (event == item) { |
332 | printf("lognestmonster (lnmEventPush): attempt to push event to self. exiting...\n"); |
333 | exit(1); |
334 | } |
335 | lnm_log_statement * item_cast = (lnm_log_statement *)item; |
336 | if (item_cast->boolpushed == 1) { |
337 | printf("lognestmonster (lnmEventPush): attempt to push an already-pushed log item. exiting...\n"); |
338 | exit(1); |
339 | } |
340 | lnm_log_event * event_t = (lnm_log_event *)event; |
341 | if (event_t->type != 1) { |
342 | printf("lognestmonster (lnmEventPush): cannot cast non-event to event type. exiting...\n"); |
343 | exit(1); |
344 | } |
345 | lnm_pushable_push(event_t->pushed, item); |
346 | item_cast->boolpushed = 1; |
347 | lnm_registry_update(); |
348 | } |
349 |
|
350 | void lnmEventPushS(lnmItem event, uint8_t verbosity, char * tag, char * message) { |
351 | lnmItem statement = lnmStatement(verbosity, tag, message); |
352 | lnmEventPush(event, statement); |
353 | } |
354 |
|
355 | lnmItem lnmEventI(lnmItem item) { |
356 | lnmItem event = lnmEvent(); |
357 | lnmEventPush(event, item); |
358 | return event; |
359 | } |
360 |
|
361 | lnmItem lnmEventS(uint8_t verbosity, char * tag, char * message) { |
362 | lnmItem statement = lnmStatement(verbosity, tag, message); |
363 | return lnmEventI(statement); |
364 | } |
365 |
|
366 |
|
367 | void lnm_debug_tabs(int count) { |
368 | for (int i = 0; i < count; i++) { |
369 | printf(" "); |
370 | } |
371 | } |
372 |
|
373 | void lnm_debug_parse_item(lnmItem item, int tabcount) { |
374 | if (lnm_isstatement(item)) { |
375 | lnm_log_statement * statement = (lnm_log_statement *) item; |
376 | lnm_debug_tabs(tabcount); |
377 | printf("Statement {\n"); |
378 |
|
379 | lnm_debug_tabs(tabcount+1); |
380 | char * verbosity; |
381 | switch (statement->verbosity) { |
382 | case 0: |
383 | verbosity = "INFO"; |
384 | break; |
385 | case 1: |
386 | verbosity = "DEBUG"; |
387 | break; |
388 | case 2: |
389 | verbosity = "VERBOSE"; |
390 | break; |
391 | case 3: |
392 | verbosity = "VERYVERBOSE"; |
393 | break; |
394 | case 4: |
395 | verbosity = "WARNING"; |
396 | break; |
397 | case 5: |
398 | verbosity = "ERROR"; |
399 | break; |
400 | } |
401 | printf("Verbosity %s\n", verbosity); |
402 |
|
403 | lnm_debug_tabs(tabcount+1); |
404 | printf("Timestamp %" PRIu64 "\n", statement->timestamp); |
405 |
|
406 | lnm_debug_tabs(tabcount+1); |
407 | char tag[statement->tag_size+1]; |
408 | strncpy(tag, statement->log, statement->tag_size); |
409 | tag[statement->tag_size] = '\0'; |
410 | printf("Tag (%" PRIu8 ") \"%s\"\n", statement->tag_size, tag); |
411 |
|
412 | lnm_debug_tabs(tabcount+1); |
413 | char message[statement->message_size+1]; |
414 | strncpy(message, statement->log+statement->tag_size, statement->message_size); |
415 | message[statement->message_size] = '\0'; |
416 | printf("Message (%" PRIu16 ") \"%s\"\n", statement->message_size, message); |
417 |
|
418 | lnm_debug_tabs(tabcount); |
419 | printf("}\n"); |
420 | } else if (!lnm_isstatement(item)) { |
421 | lnm_log_event * event = (lnm_log_event *) item; |
422 | lnm_debug_tabs(tabcount); |
423 | printf("Event (%" PRIu32 ") [%" PRIu32 "] [\n", event->pushed->length, event->pushed->capacity); |
424 | for (uint32_t i = 0; i < event->pushed->length; i++) { |
425 | lnmItem item = event->pushed->pushed[i]; |
426 | lnm_debug_parse_item(item, tabcount + 1); |
427 | } |
428 | lnm_debug_tabs(tabcount); |
429 | printf("]\n"); |
430 | } else { |
431 | printf("lognestmonster (lnm_debug_parse_item): unknown item type. exiting...\n"); |
432 | exit(1); |
433 | } |
434 | } |
435 |
|
436 | void lnm_debug_parse_registry() { |
437 | printf("Top level registry (%" PRIu32 ") [%" PRIu32 "] {\n", lnm_registered_items->length, lnm_registered_items->capacity); |
438 | for (uint32_t iter = 0; iter < lnm_registered_items->length; iter++) { |
439 | lnm_debug_parse_item(lnm_registered_items->pushed[iter], 1); |
440 | } |
441 | printf("}\n"); |
442 | } |
443 |
|
444 | #endif // DEFINE_LOGNESTMONSTER |
445 |
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