summaryrefslogtreecommitdiff
path: root/src/common/utils.c
blob: f4e2612224119601d8652ea6557abfda5af2822e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
// Copyright (c) Hercules Dev Team, licensed under GNU GPL.
// See the LICENSE file
// Portions Copyright (c) Athena Dev Teams

#define HERCULES_CORE

#include "utils.h"

#include <math.h> // floor()
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h> // cache purposes [Ind/Hercules]

#include "../common/cbasetypes.h"
#include "../common/core.h"
#include "../common/malloc.h"
#include "../common/mmo.h"
#include "../common/showmsg.h"
#include "../common/socket.h"

#ifdef WIN32
#	include "../common/winapi.h"
#	ifndef F_OK
#		define F_OK   0x0
#	endif  /* F_OK */
#else
#	include <dirent.h>
#	include <sys/stat.h>
#	include <unistd.h>
#endif

struct HCache_interface HCache_s;

/// Dumps given buffer into file pointed to by a handle.
void WriteDump(FILE* fp, const void* buffer, size_t length)
{
	size_t i;
	char hex[48+1], ascii[16+1];

	fprintf(fp, "--- 00-01-02-03-04-05-06-07-08-09-0A-0B-0C-0D-0E-0F   0123456789ABCDEF\n");
	ascii[16] = 0;

	for( i = 0; i < length; i++ )
	{
		char c = RBUFB(buffer,i);

		ascii[i%16] = ISCNTRL(c) ? '.' : c;
		sprintf(hex+(i%16)*3, "%02X ", RBUFB(buffer,i));

		if( (i%16) == 15 )
		{
			fprintf(fp, "%03X %s  %s\n", (unsigned int)(i/16), hex, ascii);
		}
	}

	if( (i%16) != 0 )
	{
		ascii[i%16] = 0;
		fprintf(fp, "%03X %-48s  %-16s\n", (unsigned int)(i/16), hex, ascii);
	}
}


/// Dumps given buffer on the console.
void ShowDump(const void *buffer, size_t length) {
	size_t i;
	char hex[48+1], ascii[16+1];

	ShowDebug("--- 00-01-02-03-04-05-06-07-08-09-0A-0B-0C-0D-0E-0F   0123456789ABCDEF\n");
	ascii[16] = 0;

	for (i = 0; i < length; i++) {
		char c = RBUFB(buffer,i);

		ascii[i%16] = ISCNTRL(c) ? '.' : c;
		sprintf(hex+(i%16)*3, "%02X ", RBUFB(buffer,i));

		if ((i%16) == 15) {
			ShowDebug("%03"PRIXS" %s  %s\n", i/16, hex, ascii);
		}
	}

	if ((i%16) != 0) {
		ascii[i%16] = 0;
		ShowDebug("%03"PRIXS" %-48s  %-16s\n", i/16, hex, ascii);
	}
}


#ifdef WIN32

static char* checkpath(char *path, const char *srcpath)
{
	// just make sure the char*path is not const
	char *p=path;
	if(NULL!=path && NULL!=srcpath)
	while(*srcpath) {
		if (*srcpath=='/') {
			*p++ = '\\';
			srcpath++;
		}
		else
			*p++ = *srcpath++;
	}
	*p = *srcpath; //EOS
	return path;
}

void findfile(const char *p, const char *pat, void (func)(const char*))
{
	WIN32_FIND_DATAA FindFileData;
	HANDLE hFind;
	char tmppath[MAX_PATH+1];
	const char *path    = (p  ==NULL)? "." : p;
	const char *pattern = (pat==NULL)? "" : pat;

	checkpath(tmppath,path);
	if( PATHSEP != tmppath[strlen(tmppath)-1])
		strcat(tmppath, "\\*");
	else
		strcat(tmppath, "*");

	hFind = FindFirstFileA(tmppath, &FindFileData);
	if (hFind != INVALID_HANDLE_VALUE)
	{
		do
		{
			if (strcmp(FindFileData.cFileName, ".") == 0)
				continue;
			if (strcmp(FindFileData.cFileName, "..") == 0)
				continue;

			sprintf(tmppath,"%s%c%s",path,PATHSEP,FindFileData.cFileName);

			if (strstr(FindFileData.cFileName, pattern)) {
				func( tmppath );
			}


			if( FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
			{
				findfile(tmppath, pat, func);
			}
		}while (FindNextFileA(hFind, &FindFileData) != 0);
		FindClose(hFind);
	}
	return;
}
#else

#define MAX_DIR_PATH 2048

static char* checkpath(char *path, const char*srcpath)
{
	// just make sure the char*path is not const
	char *p=path;
	if(NULL!=path && NULL!=srcpath)
	while(*srcpath) {
		if (*srcpath=='\\') {
			*p++ = '/';
			srcpath++;
		}
		else
			*p++ = *srcpath++;
	}
	*p = *srcpath; //EOS
	return path;
}

void findfile(const char *p, const char *pat, void (func)(const char*))
{
	DIR* dir;             ///< pointer to the scanned directory.
	struct dirent* entry; ///< pointer to one directory entry.
	struct stat dir_stat; ///< used by stat().
	char tmppath[MAX_DIR_PATH+1];
	char path[MAX_DIR_PATH+1]= ".";
	const char *pattern = (pat==NULL)? "" : pat;
	if(p!=NULL) strcpy(path,p);

	// open the directory for reading
	dir = opendir( checkpath(path, path) );
	if (!dir) {
		ShowError("Cannot read directory '%s'\n", path);
		return;
	}

	// scan the directory, traversing each sub-directory
	// matching the pattern for each file name.
	while ((entry = readdir(dir))) {
		// skip the "." and ".." entries.
		if (strcmp(entry->d_name, ".") == 0)
			continue;
		if (strcmp(entry->d_name, "..") == 0)
			continue;

		sprintf(tmppath,"%s%c%s",path, PATHSEP, entry->d_name);

		// check if the pattern matches.
		if (entry->d_name && strstr(entry->d_name, pattern)) {
			func( tmppath );
		}
		// check if it is a directory.
		if (stat(tmppath, &dir_stat) == -1) {
			ShowError("stat error %s\n': ", tmppath);
			continue;
		}
		// is this a directory?
		if (S_ISDIR(dir_stat.st_mode)) {
			// decent recursively
			findfile(tmppath, pat, func);
		}
	}//end while

	closedir(dir);
}
#endif

bool exists(const char* filename)
{
	return !access(filename, F_OK);
}

uint8 GetByte(uint32 val, int idx)
{
	switch( idx )
	{
	case 0: return (uint8)( (val & 0x000000FF)         );
	case 1: return (uint8)( (val & 0x0000FF00) >> 0x08 );
	case 2: return (uint8)( (val & 0x00FF0000) >> 0x10 );
	case 3: return (uint8)( (val & 0xFF000000) >> 0x18 );
	default:
#if defined(DEBUG)
		ShowDebug("GetByte: invalid index (idx=%d)\n", idx);
#endif
		return 0;
	}
}

uint16 GetWord(uint32 val, int idx)
{
	switch( idx )
	{
	case 0: return (uint16)( (val & 0x0000FFFF)         );
	case 1: return (uint16)( (val & 0xFFFF0000) >> 0x10 );
	default:
#if defined(DEBUG)
		ShowDebug("GetWord: invalid index (idx=%d)\n", idx);
#endif
		return 0;
	}
}
uint16 MakeWord(uint8 byte0, uint8 byte1)
{
	return byte0 | (byte1 << 0x08);
}

uint32 MakeDWord(uint16 word0, uint16 word1)
{
	return
		( (uint32)(word0        ) )|
		( (uint32)(word1 << 0x10) );
}

/*************************************
* Big-endian compatibility functions *
*************************************/

// Converts an int16 from current machine order to little-endian
int16 MakeShortLE(int16 val)
{
	unsigned char buf[2];
	buf[0] = (unsigned char)( (val & 0x00FF)         );
	buf[1] = (unsigned char)( (val & 0xFF00) >> 0x08 );
	return *((int16*)buf);
}

// Converts an int32 from current machine order to little-endian
int32 MakeLongLE(int32 val)
{
	unsigned char buf[4];
	buf[0] = (unsigned char)( (val & 0x000000FF)         );
	buf[1] = (unsigned char)( (val & 0x0000FF00) >> 0x08 );
	buf[2] = (unsigned char)( (val & 0x00FF0000) >> 0x10 );
	buf[3] = (unsigned char)( (val & 0xFF000000) >> 0x18 );
	return *((int32*)buf);
}

// Reads an uint16 in little-endian from the buffer
uint16 GetUShort(const unsigned char* buf)
{
	return ( ((uint16)(buf[0]))         )
	     | ( ((uint16)(buf[1])) << 0x08 );
}

// Reads an uint32 in little-endian from the buffer
uint32 GetULong(const unsigned char* buf)
{
	return ( ((uint32)(buf[0]))         )
	     | ( ((uint32)(buf[1])) << 0x08 )
	     | ( ((uint32)(buf[2])) << 0x10 )
	     | ( ((uint32)(buf[3])) << 0x18 );
}

// Reads an int32 in little-endian from the buffer
int32 GetLong(const unsigned char* buf)
{
	return (int32)GetULong(buf);
}

// Reads a float (32 bits) from the buffer
float GetFloat(const unsigned char* buf)
{
	uint32 val = GetULong(buf);
	return *((float*)(void*)&val);
}

/// calculates the value of A / B, in percent (rounded down)
unsigned int get_percentage(const unsigned int A, const unsigned int B)
{
	double result;

	if( B == 0 )
	{
		ShowError("get_percentage(): division by zero! (A=%u,B=%u)\n", A, B);
		return ~0U;
	}

	result = 100 * ((double)A / (double)B);

	if( result > UINT_MAX )
	{
		ShowError("get_percentage(): result percentage too high! (A=%u,B=%u,result=%g)\n", A, B, result);
		return UINT_MAX;
	}

	return (unsigned int)floor(result);
}

//-----------------------------------------------------
// custom timestamp formatting (from eApp)
//-----------------------------------------------------
const char* timestamp2string(char* str, size_t size, time_t timestamp, const char* format)
{
	size_t len = strftime(str, size, format, localtime(&timestamp));
	memset(str + len, '\0', size - len);
	return str;
}


/* [Ind/Hercules] Caching */
bool HCache_check(const char *file) {
	struct stat bufa, bufb;
	FILE *first, *second;
	char s_path[255], dT[1];
	time_t rtime;

	if( !(first = fopen(file,"rb")) )
		return false;

	if( file[0] == '.' && file[1] == '/' )
		file += 2;
	else if( file[0] == '.' )
		file++;

	snprintf(s_path, 255, "./cache/%s", file);

	if( !(second = fopen(s_path,"rb")) ) {
		fclose(first);
		return false;
	}

	if( fread(dT,sizeof(dT),1,second) != 1 || fread(&rtime,sizeof(rtime),1,second) != 1 || dT[0] != HCACHE_KEY || HCache->recompile_time > rtime ) {
		fclose(first);
		fclose(second);
		return false;
	}

	fstat(fileno(first), &bufa);
	fstat(fileno(second), &bufb);

	fclose(first);
	fclose(second);

	if( bufa.st_mtime > bufb.st_mtime )
		return false;

	return true;
}

FILE *HCache_open(const char *file, const char *opt) {
	FILE *first;
	char s_path[255];

	if( file[0] == '.' && file[1] == '/' )
		file += 2;
	else if( file[0] == '.' )
		file++;

	snprintf(s_path, 255, "./cache/%s", file);

	if( !(first = fopen(s_path,opt)) ) {
		return NULL;
	}

	if( opt[0] != 'r' ) {
		char dT[1];/* 1-byte key to ensure our method is the latest, we can modify to ensure the method matches */
		dT[0] = HCACHE_KEY;
		hwrite(dT,sizeof(dT),1,first);
		hwrite(&HCache->recompile_time,sizeof(HCache->recompile_time),1,first);
	}
	fseek(first, 20, SEEK_SET);/* skip first 20, might wanna store something else later */

	return first;
}
void HCache_init(void) {
	FILE *server;

	if( (server = fopen(SERVER_NAME,"rb")) ) {
		struct stat buf;

		fstat(fileno(server), &buf);
		HCache->recompile_time = buf.st_mtime;
		fclose(server);

		HCache->enabled = true;
	} else
		ShowWarning("Unable to open '%s', caching capabilities have been disabled!\n",SERVER_NAME);
}
/* transit to fread, shields vs warn_unused_result */
size_t hread(void * ptr, size_t size, size_t count, FILE * stream) {
	return fread(ptr, size, count, stream);
}
/* transit to fwrite, shields vs warn_unused_result */
size_t hwrite(const void * ptr, size_t size, size_t count, FILE * stream) {
	return fwrite(ptr, size, count, stream);
}

void HCache_defaults(void) {
	HCache = &HCache_s;

	HCache->init = HCache_init;

	HCache->check = HCache_check;
	HCache->open = HCache_open;
	HCache->recompile_time = 0;
	HCache->enabled = false;
}