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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <stdint.h>
  4. #include <stdlib.h>
  5. #include <time.h>
  6.  
  7. #define RAND() ((unsigned int)((rand() & 0xff) | ((rand() & 0xff) << 8) | ((rand() & 0xff) << 16) | ((rand() & 0xff) << 24)))
  8. #define GIGA               (uint64_t)((uint64_t)0x400*(uint64_t)0x400*(uint64_t)0x400)
  9. #define MAX_LENGTH_SECTION 0x1f
  10. #define MAX_LENGTH_TEXT    0x7f
  11. #define MAX_LENGTH_BUF     0xff
  12. #define MAX_UINT32         0xffffffff
  13.  
  14. static char const* asz_mon[12] = {
  15. "Jan","Feb","Mar","Apr","May","Jun",
  16. "Jul","Aug","Sep","Oct","Nov","Dec"};
  17.  
  18. static char* gen_string1(char* sz_string, size_t u_length) {
  19.  
  20. 	unsigned char* psz_string = (unsigned char*)sz_string;
  21. 	unsigned char* psz_string_end = (unsigned char*)sz_string + u_length;
  22.  
  23. 	for (; psz_string < psz_string_end; ++psz_string) {
  24. 		*psz_string = 0x21 + (RAND() % 94);
  25. 	}
  26.  
  27. 	*psz_string = '\0';
  28. 	return sz_string;
  29. }
  30.  
  31. static char* gen_string2(char* sz_string, size_t u_length) {
  32.  
  33. 	unsigned char c;
  34. 	char* psz_string = sz_string;
  35. 	char* psz_string_end = sz_string + u_length;
  36.  
  37. 	for (; psz_string < psz_string_end; ++psz_string) {
  38. 		c = RAND() % 52;
  39. 		if (c < 26) {
  40. 			*psz_string = 'A' + c;
  41. 		} else {
  42. 			*psz_string = 'a' + (c -26);
  43. 		}
  44. 	}
  45.  
  46. 	*psz_string = '\0';
  47. 	return sz_string;
  48. }
  49.  
  50. int gen_data(FILE* fp, size_t u_GiB) {
  51.  
  52. 	char sz_buf[MAX_LENGTH_BUF+1];
  53.  
  54. 	unsigned int u_string_recs;
  55. 	unsigned int u_hatena;
  56. 	unsigned int u_xy_recs;
  57. 	unsigned int u_num_recs;
  58. 	char x_or_y;
  59. 	time_t u_time = time(NULL);
  60. 	tm*    pt_tm = ::localtime(&u_time);
  61. 	uint64_t u_pos;
  62.  
  63. 	::srand((unsigned int)time(NULL));
  64.  
  65. 	for (;;) {
  66. 		// ①ｾｸｼｮﾝ名
  67. 		// ex. SECTION_NAME　①
  68. 		::fprintf(fp, "%s\x0a", gen_string2(sz_buf, 1 + (RAND() % MAX_LENGTH_SECTION)));
  69.  
  70. 		// ②ｾｸｼｮﾝ集計値
  71. 		// ex. 11200 11200 2 Jun  9 23:23:00 2018　②
  72. //		u_xy_recs = RAND() % 0x8000000 + 1;
  73. 		u_xy_recs = RAND() % 0x8000 + 1;
  74. 		u_hatena  = u_xy_recs;
  75. 		u_string_recs = RAND() % 0x20 + 1;
  76. 		::sprintf(sz_buf, "%s %.2d %02d:%02d:%02d %d", asz_mon[pt_tm->tm_mon], pt_tm->tm_mday, pt_tm->tm_hour, pt_tm->tm_min, pt_tm->tm_sec, pt_tm->tm_year+1900);
  77. 		::fprintf(fp, "%u %u %u %s\x0a", u_xy_recs, u_hatena, u_string_recs, sz_buf);
  78.  
  79. 		// ③ﾃｷｽﾄ
  80. 		// ex. This is pen.　③
  81. 		//     hello world.　③
  82. 		for (unsigned int j = 0; j < u_string_recs; ++j) {
  83. 			::fprintf(fp, "%s\x0a", gen_string1(sz_buf, 1 + (RAND() % MAX_LENGTH_TEXT)));
  84. 		}
  85.  
  86. 		// ④数値
  87. 		// ex. x 1 2　④
  88. 		for (unsigned int j = 0; j < u_xy_recs; ++j) {
  89. 			x_or_y = (RAND() % 2) ? 'x' : 'y';
  90. //			u_num_recs = RAND() % 0x400 + 1;
  91. 			u_num_recs = RAND() % 0x100 + 1;
  92. 			::fprintf(fp, "%c %u %u\x0a", x_or_y, j + 1, u_num_recs);
  93. 			if (RAND() % 2) {
  94. 				// ⑤QQ 謎の行
  95. 				// QQ subname -1 0 0 1 -21000000 600000 2
  96. 				::fprintf(fp, "QQ %s %d %d %d %d %d %d %d\x0a",
  97. 					gen_string2(sz_buf, 1 + (RAND() % MAX_LENGTH_SECTION)),
  98. 					(int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND());
  99. 			}
  100. 			if (x_or_y == 'x') {
  101. 				for (unsigned int k = 0; k < u_num_recs; ++k) {
  102. 					// 100 1 -2000 10
  103. 					::fprintf(fp, "%d %d %d %d\x0a",
  104. 						(int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND(), (int32_t)RAND());
  105. 				}
  106. 			} else {
  107. 				for (unsigned int k = 0; k < u_num_recs; ++k) {
  108. 					// -100 10000
  109. 					::fprintf(fp, "%d %d\x0a",
  110. 						(int32_t)RAND(), (int32_t)RAND());
  111. 				}
  112. 			}
  113. 		}
  114.  
  115. 		u_pos = ftello(fp);
  116.  
  117. 		if (u_pos > GIGA * (uint64_t)u_GiB) {
  118. 			break;
  119. 		}
  120. 	}
  121.  
  122. 	return 0;
  123. }
  124.  
  125. int main(int argc, char** argv) {
  126.  
  127. 	if (argc != 3) {
  128. 		::fprintf(stderr, "Usage: %s <filepath> <buffer size>\n", argv[0]);
  129. 		return 1;
  130. 	}
  131.  
  132. 	char* filename = argv[1];
  133. 	size_t u_GiB = ::strtoul(argv[2], NULL, 10);;
  134.  
  135. 	if (u_GiB == 0) {
  136. 		::fprintf(stderr, "Usage: %s <filepath> <GiB size>\n", argv[0]);
  137. 		::fprintf(stderr, "<GiB size> must be greater than zero\n");
  138. 		return 1;
  139. 	}
  140.  
  141. 	FILE* fp = ::fopen(filename, "w");
  142.  
  143. 	if (::gen_data(fp, u_GiB) < 0) {fclose(fp); return -1;}
  144. 	fclose(fp);
  145. 	return 0;
  146. }
  147.  
Runtime error #stdin #stdout #stderr 0s 4384KB
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Standard input is empty
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Standard output is empty
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Usage: ./prog <filepath> <buffer size>
https://ideone.com/hi8bYd
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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