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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. enum {
  6. 	SIZE = 8192
  7. };
  8.  
  9. size_t count(const char *s, int c)
  10. {
  11. 	size_t r;
  12.  
  13. 	for (r = 0; *s; r += *s++ == (char) c)
  14. 		;
  15. 	return r;
  16. }
  17.  
  18. size_t max_strcspn(const char *s, int c)
  19. {
  20. 	size_t max, tmp;
  21.  
  22. 	for (max = tmp = 0; *s; s++) {
  23. 		if (*s != (char) c) {
  24. 			tmp++;
  25. 			continue;
  26. 		}
  27. 		if (tmp > max)
  28. 			max = tmp;
  29. 		tmp = 0;
  30. 	}
  31. 	return max;
  32. }
  33.  
  34. char *fill(char *to, size_t longest, size_t lines, const char *from)
  35. {
  36. 	char *save = to;
  37. 	size_t n;
  38.  
  39. 	for (n = longest; lines; from++)
  40. 		if (*from == '\n') {
  41. 			memset(to, ' ', n);
  42. 			to += n;
  43. 			n = longest;
  44. 			lines--;
  45. 		} else {
  46. 			*to++ = *from;
  47. 			n--;
  48. 		}
  49. 	return save;
  50. }
  51.  
  52. char *readall(FILE *iop)
  53. {
  54. 	char buf[SIZE];
  55. 	size_t a = 0, n;
  56. 	char *r, *tmp;
  57.  
  58. 	for (r = 0; (n = fread(buf, 1, SIZE, iop)) == SIZE; r = tmp) {
  59. 		if (!(tmp = realloc(r, a + SIZE))) {
  60. 			free(r);
  61. 			return 0;
  62. 		}
  63. 		memcpy(tmp + SIZE, buf, SIZE);
  64. 		a += SIZE;
  65. 	}
  66. 	if (!(tmp = realloc(r, a + n + 1))) {
  67. 		free(r);
  68. 		return 0;
  69. 	}
  70. 	memcpy(tmp + a, buf, n);
  71. 	tmp[a + n] = '\0';
  72. 	return tmp;
  73. }
  74.  
  75. int main(void)
  76. {
  77. 	size_t lines, longest;
  78. 	char *ptr, *s;
  79.  
  80. 	if (!(s = readall(stdin))
  81. 	 || !(ptr = malloc((lines = count(s, '\n')) *
  82. 			   (longest = max_strcspn(s, '\n'))))) {
  83. 		free(s);
  84. 		return EXIT_FAILURE;
  85. 	}
  86. 	fill(ptr, longest, lines, s);
  87. 	for (size_t i = 0; i < longest; i++) {
  88. 		for (size_t n = 0; n < lines; n++)
  89. 			putchar(ptr[longest * n + i]);
  90. 		puts("");
  91. 	}
  92. 	free(s);
  93. 	free(ptr);
  94. }
Success #stdin #stdout 0s 1968KB
comments (?)
stdin
copy 
The quick brown fox
jumped over the
lazy retoids.
stdout
copy 
Tjl
hua
emz
 py
qe 
udr
i e
cot
kvo
 ei
brd
r s
ot.
wh 
ne 
   
f  
o  
x
https://ideone.com/SnV26P
language:
C99 (gcc 8.3)
created:
12 years ago
visibility:
secret

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