Simplify and change license to ISC

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 0 insertions, 193 deletions

diff --git a/src/learn-your-telephone-number.c b/src/learn-your-telephone-number.c
deleted file mode 100644
index 6540feb..0000000
--- a/src/learn-your-telephone-number.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/**
- * Copyright © 2016  Mattias Andrée <maandree@member.fsf.org>
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-#define _DEFAULT_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <alloca.h>
-#include <errno.h>
-#include <string.h>
-
-
-#define t(...)  do { if (__VA_ARGS__) goto fail; } while (0)
-
-
-static const char* argv0;
-
-
-char* compare(const char* restrict e, const char* restrict c)
-{
-  size_t en = strlen(e);
-  size_t cn = strlen(c);
-  size_t** matrix = alloca((en + 1) * sizeof(size_t*));
-  char** path_matrix = alloca((en + 1) * sizeof(char*));
-  size_t ei, ci, ri = 0;
-  char* rc = NULL;
-  
-  for (ei = 0; ei <= en; ei++)
-    {
-      matrix[ei] = alloca((cn + 1) * sizeof(size_t));
-      matrix[ei][0] = ei;
-      path_matrix[ei] = alloca((cn + 1) * sizeof(char));
-      path_matrix[ei][0] = '|';
-    }
-  for (ci = 0; ci <= cn; ci++)
-    {
-      matrix[0][ci] = ci;
-      path_matrix[0][ci] = '-';
-    }
-  path_matrix[0][0] = '\0';
-  
-  e--, c--;
-  
-  for (ei = 1; ei <= en; ei++)
-    for (ci = 1; ci <= cn; ci++)
-      {
-	size_t d = matrix[ei - 1][ci - 1];
-	size_t l = matrix[ei + 0][ci - 1];
-	size_t u = matrix[ei - 1][ci + 0];
-	size_t lu = 1 + (l < u ? l : u);
-	int ch = (e[ei] != c[ci]);
-	d += (size_t)ch;
-	matrix[ei][ci] = d < lu ? d : lu;
-	path_matrix[ei][ci] = d < lu ? (ch ? '\\' : '=') : (l < u ? '-' : '|');
-      }
-  
-  t (!(rc = malloc((en + cn + 2) * sizeof(char))));
-  
-#if 0
-  for (ei = 0; ei <= en; ei++)
-    {
-      for (ci = 0; ci <= cn; ci++)
-	printf("%zu%s", matrix[ei][ci], ci == cn ? "" :
-	                                path_matrix[ei][ci + 1] == '-' ? "\033[1;32m-\033[m" : " ");
-      printf("\n");
-      if (ei < en)
-	for (ci = 0; ci < cn; ci++)
-	  printf("%s%s", path_matrix[ei + 1][ci + 0] == '|' ? "\033[1;31m|\033[m" : " ",
-			 path_matrix[ei + 1][ci + 1] == '\\' ? "\033[1;33m\\\033[m" :
-			 path_matrix[ei + 1][ci + 1] == '=' ? "\033[1;39m\\\033[m" : " ");
-      printf("\n");
-    }
-#endif
-  
-  rc[ri++] = '\0';
-  for (ei = en, ci = cn; ei + ci;)
-    switch (path_matrix[ei][ci])
-      {
-      case '=':   ei--, ci--;  rc[ri++] = '=';  break;
-      case '\\':  ei--, ci--;  rc[ri++] = '!';  break;
-      case '|':   ei--;        rc[ri++] = '-';  break;
-      case '-':         ci--;  rc[ri++] = '+';  break;
-      default:
-	abort();
-      }
-  rc[ri] = '\0';
-  
- fail:
-  return rc;
-}
-
-
-int main(int argc, char* argv[])
-{
-  char* correct;
-  char* entered = NULL;
-  size_t n = 0;
-  void* new;
-  char* w;
-  char* r;
-  char* path = NULL;
-  char* path_;
-  char* p;
-  int rc = 0;
-  
-  argv0 = argc ? argv[0] : "learn-your-telephone-number";
-  if (argc != 2)
-    goto usage;
-  
-  correct = alloca((2 * strlen(argv[1]) + 1) * sizeof(char));
-  for (w = correct, r = argv[1]; *r; r++)
-    if      (isdigit(*r))  *w++ = *r;
-    else if (isalpha(*r))  goto usage;
-    else if (*r == '+')    *w++ = '0', *w++ = '0';
-  *w = '\0';
-  
-  t (fprintf(stdout, "Enter your telephone number: ") < 0);
-  t (fflush(stdout));
-  t (errno = 0, getline(&entered, &n, stdin) < 0);
-  n = strlen(entered) - 1;
-  entered[n] = '\0';
-  
-  t (!(new = realloc(entered, (2 * n + 1) * sizeof(char))));
-  entered = new;
-  memmove(r = (entered + n), w = (entered), n + 1);
-  for (; *r; r++)
-    if      (isdigit(*r))  *w++ = *r;
-    else if (*r == '+')    *w++ = '0', *w++ = '0';
-  *w = '\0';
-  
-  if (!strcmp(entered, correct))
-    goto done;
-  t (!(path = compare(entered, correct)));
-  
-  path_ = strchr(path + 1, '\0');
-  t (fprintf(stdout, "\033[A\033[KEntered: ") < 0);
-  for (p = entered; *--path_;)
-    switch (*path_)
-      {
-      case '=':  t (fprintf(stdout, "\033[39m%c", *p++) < 0);  break;
-      case '!':  t (fprintf(stdout, "\033[31m%c", *p++) < 0);  break;
-      case '+':  t (fprintf(stdout, " ")                < 0);  break;
-      case '-':  t (fprintf(stdout, "\033[31m%c", *p++) < 0);  break;
-      }
-  t (fprintf(stdout, "\033[m\n") < 0);
-  
-  path_ = strchr(path + 1, '\0');
-  t (fprintf(stdout, "Correct: ") < 0);
-  for (p = correct; *--path_;)
-    switch (*path_)
-      {
-      case '=':  t (fprintf(stdout, "\033[39m%c", *p++) < 0);  break;
-      case '!':  t (fprintf(stdout, "\033[32m%c", *p++) < 0);  break;
-      case '+':  t (fprintf(stdout, "\033[32m%c", *p++) < 0);  break;
-      case '-':  t (fprintf(stdout, " ")                < 0);  break;
-      }
-  t (fprintf(stdout, "\033[m\n") < 0);
-  
-  rc = 1;
- done:
-  free(entered);
-  free(path);
-  return rc;
- fail:
-  rc = 1;
-  if (errno == 0)
-    goto done;
-  perror(argv0);
-  rc = 2;
-  goto done;
- usage:
-  fprintf(stderr, "usage: %s YOUR-TELEPHONE-NUMBER\n", argv0);
-  return 2;
-}
-