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utils

Old programs, got split in utils-std and utils-extra git clone https://anongit.hacktivis.me/git/utils.git/

humanize.c (2855B)

    

  1. // Collection of Unix tools, comparable to coreutils
  2. // SPDX-FileCopyrightText: 2017-2023 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
  3. // SPDX-License-Identifier: MPL-2.0
  5. #define _POSIX_C_SOURCE 200809L
  7. #include <err.h>     // errx
  8. #include <errno.h>   // EINVAL, ERANGE
  9. #include <limits.h>  // LLONG_MIN, LLONG_MAX
  10. #include <stdbool.h> // bool
  11. #include <stdio.h>   // fprintf, perror, sscanf
  12. #include <stdlib.h>  // strtonum
  13. #include <unistd.h>  // opt*, getopt
  15. void
  16. dtosi(double num, char *buf, size_t bufsize, bool iec)
  17. {
  18. #define PFX 11
  19. 	char *si_prefixes[PFX]  = {"", "k", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"};
  20. 	char *iec_prefixes[PFX] = {
  21. 	    "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB", "RiB", "QiB"};
  23. 	int div         = iec ? 1024 : 1000;
  24. 	char **prefixes = iec ? iec_prefixes : si_prefixes;
  26. 	unsigned quotient = 0;
  28. 	while(num > div && quotient < PFX)
  29. 	{
  30. 		num /= div;
  31. 		quotient += 1;
  32. 	}
  34. 	snprintf(buf, bufsize, "%g %s", num, prefixes[quotient]);
  35. }
  37. static void
  38. usage()
  39. {
  40. 	fprintf(stderr, "Usage: humanize [-bdt] number\n");
  41. }
  43. int
  44. main(int argc, char *argv[])
  45. {
  46. 	// default to -d
  47. 	bool iec = false, time = false;
  49. 	int c = -1;
  50. 	while((c = getopt(argc, argv, ":bdt")) != -1)
  51. 	{
  52. 		switch(c)
  53. 		{
  54. 		case 'b':
  55. 			iec = true;
  56. 			break;
  57. 		case 'd':
  58. 			iec = false;
  59. 			break;
  60. 		case 't':
  61. 			time = true;
  62. 			break;
  63. 		case ':':
  64. 			fprintf(stderr, "humanize: Error: Missing operand for option: '-%c'\n", optopt);
  65. 			usage();
  66. 			return 1;
  67. 		case '?':
  68. 			fprintf(stderr, "humanize: Error: Unrecognised option: '-%c'\n", optopt);
  69. 			usage();
  70. 			return 1;
  71. 		}
  72. 	}
  74. 	argc -= optind;
  75. 	argv += optind;
  77. 	if(argc < 1)
  78. 	{
  79. 		usage();
  80. 		return 1;
  81. 	}
  83. 	for(int argi = 0; argi < argc; argi++)
  84. 	{
  85. 		const char *errstr = NULL;
  86. 		char buf[32]       = "";
  88. 		if(time)
  89. 		{
  90. 			int year = 0, month = 0, mday = 0, hour = 0, min = 0, sec = 0;
  91. 			long int epoch = 0;
  93. 			if(sscanf(argv[argi], "%ld", &epoch) < 1)
  94. 			{
  95. 				perror("humanize: sscanf");
  96. 				return 1;
  97. 			}
  99. 			year = epoch / 31556926; // round(year)
  100. 			epoch %= 31556926;
  101. 			month = epoch / 2629743; // year/12
  102. 			epoch %= 2629743;
  103. 			mday = epoch / 86400;
  104. 			epoch %= 86400;
  106. 			hour = epoch / 3600;
  107. 			epoch %= 3600;
  108. 			min = epoch / 60;
  109. 			epoch %= 60;
  110. 			sec = epoch;
  112. 			if(year > 0) printf("%d年 ", year);
  113. 			if(month > 0) printf("%d月 ", month);
  114. 			if(mday > 0) printf("%d日 ", mday);
  115. 			if(hour > 0) printf("%dh ", hour);
  116. 			if(min > 0) printf("%dm ", min);
  117. 			if(sec > 0) printf("%ds", sec);
  118. 			printf("\n");
  120. 			continue;
  121. 		}
  123. 		errno       = 0;
  124. 		long long n = strtoll(argv[argi], NULL, 10);
  125. 		if(n == LLONG_MIN)
  126. 		{
  127. 			errx(1, "%s is too small", argv[argi]);
  128. 		}
  129. 		if(n == LLONG_MAX)
  130. 		{
  131. 			errx(1, "%s is too large", argv[argi]);
  132. 		}
  133. 		if(errno != 0)
  134. 		{
  135. 			perror("humanize: strtoll");
  136. 		}
  138. 		dtosi(n, buf, 32, iec);
  140. 		printf("%s\n", buf);
  141. 	}
  143. 	return 0;
  144. }