diff options
| -rw-r--r-- | codeword.c | 96 |
1 files changed, 93 insertions, 3 deletions
@@ -2,6 +2,7 @@ #include <stdio.h> #include <string.h> #include <errno.h> +#include <ctype.h> typedef struct { @@ -10,14 +11,20 @@ typedef struct char letter; } Character; -static void Chomp(char *p) +static void PrepLine(char *p) { size_t l = strlen(p); + size_t f; while (l && p[l-1] == '\n') { p[--l] = 0; } + + for(f = 0; f < l; f++) + { + p[f] = tolower((unsigned char)p[f]); + } } static void Error(const char *p) @@ -26,6 +33,82 @@ static void Error(const char *p) exit(EXIT_FAILURE); } +static int ContainsLetter(char c, const Character *chars, int no_chars) +{ + int f; + + for(f=0; f < no_chars; f++) + { + if (chars[f].is_letter && chars[f].letter == c) + { + return 1; + } + } + + return 0; +} + +static int CheckLettersAndLength(const char *buff, + const Character *chars, + int no_chars) +{ + size_t l = strlen(buff); + int f; + + if (l != no_chars) + { + return 0; + } + + for(f=0; f < no_chars; f++) + { + if (chars[f].is_letter && + (chars[f].letter != buff[f])) + { + return 0; + } + } + + return 1; +} + +static int CheckNumbers(const char *buff, const Character *chars, int no_chars) +{ + int f; + int n; + char code[27] = {0}; + + for(f = 0; f < no_chars; f++) + { + if (!chars[f].is_letter) + { + int i = chars[f].number - 1; + + if (ContainsLetter(buff[f], chars, no_chars)) + { + return 0; + } + + if (code[i] && code[i] != buff[f]) + { + return 0; + } + + for(n = 0; n < 27; n++) + { + if (n != i && code[n] == buff[f]) + { + return 0; + } + } + + code[i] = buff[f]; + } + } + + return 1; +} + int main(int argc, char *argv[]) { int no_chars; @@ -54,10 +137,10 @@ int main(int argc, char *argv[]) i = atoi(argv[f+2]); - if (i == 0) + if (i < 1 || i > 27) { chars[f].is_letter = 1; - chars[f].letter = argv[f+2][0]; + chars[f].letter = tolower((unsigned char)argv[f+2][0]); chars[f].number = 0; } else @@ -77,6 +160,13 @@ int main(int argc, char *argv[]) while(fgets(buff, sizeof buff, fp)) { + PrepLine(buff); + + if (CheckLettersAndLength(buff, chars, no_chars) && + CheckNumbers(buff, chars, no_chars)) + { + printf("%s\n", buff); + } } return EXIT_SUCCESS; |