XXXX redacted: Difference between revisions
Added C solution
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(Added C solution) |
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Line 284:
return redactor's outputText
end redact</lang>
=={{header|C}}==
This is a very basic ASCII-only implementation, no Unicode or regular expressions.
<lang c>#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
typedef enum {
whole_word = 1,
overkill = 2,
case_insensitive = 4
} redact_options;
bool is_word_char(char ch) {
return ch == '-' || isalpha((unsigned char)ch);
}
// Performs in-place redaction of the target with the specified options.
void redact(char* text, const char* target, redact_options options) {
size_t target_length = strlen(target);
char* start = text;
char* end = text + strlen(text);
while (start < end) {
// NB: strcasestr is a non-standard extension. It's similar to the
// standard strstr function, but case-insensitive.
char* str = (options & case_insensitive) ? strcasestr(start, target)
: strstr(start, target);
if (str == NULL)
break;
char* word_start = str;
char* word_end = str + target_length;
if (options & (overkill | whole_word)) {
while (word_start > start && is_word_char(*(word_start - 1)))
--word_start;
while (word_end < end && is_word_char(*word_end))
++word_end;
}
if (!(options & whole_word) ||
(word_start == str && word_end == str + target_length))
memset(word_start, 'X', word_end - word_start);
start = word_end;
}
}
void do_basic_test(const char* target, redact_options options) {
char text[] = "Tom? Toms bottom tomato is in his stomach while playing the "
"\"Tom-tom\" brand tom-toms. That's so tom.";
redact(text, target, options);
printf("[%c|%c|%c]: %s\n", (options & whole_word) ? 'w' : 'p',
(options & case_insensitive) ? 'i' : 's',
(options & overkill) ? 'o' : 'n', text);
}
void do_basic_tests(const char* target) {
printf("Redact '%s':\n", target);
do_basic_test(target, whole_word);
do_basic_test(target, whole_word | case_insensitive);
do_basic_test(target, 0);
do_basic_test(target, case_insensitive);
do_basic_test(target, overkill);
do_basic_test(target, case_insensitive | overkill);
}
int main() {
do_basic_tests("Tom");
printf("\n");
do_basic_tests("tom");
return 0;
}</lang>
{{out}}
<pre>
Redact 'Tom':
[w|s|n]: XXX? Toms bottom tomato is in his stomach while playing the "Tom-tom" brand tom-toms. That's so tom.
[w|i|n]: XXX? Toms bottom tomato is in his stomach while playing the "Tom-tom" brand tom-toms. That's so XXX.
[p|s|n]: XXX? XXXs bottom tomato is in his stomach while playing the "XXX-tom" brand tom-toms. That's so tom.
[p|i|n]: XXX? XXXs botXXX XXXato is in his sXXXach while playing the "XXX-XXX" brand XXX-XXXs. That's so XXX.
[p|s|o]: XXX? XXXX bottom tomato is in his stomach while playing the "XXXXXXX" brand tom-toms. That's so tom.
[p|i|o]: XXX? XXXX XXXXXX XXXXXX is in his XXXXXXX while playing the "XXXXXXX" brand XXXXXXXX. That's so XXX.
Redact 'tom':
[w|s|n]: Tom? Toms bottom tomato is in his stomach while playing the "Tom-tom" brand tom-toms. That's so XXX.
[w|i|n]: XXX? Toms bottom tomato is in his stomach while playing the "Tom-tom" brand tom-toms. That's so XXX.
[p|s|n]: Tom? Toms botXXX XXXato is in his sXXXach while playing the "Tom-XXX" brand XXX-XXXs. That's so XXX.
[p|i|n]: XXX? XXXs botXXX XXXato is in his sXXXach while playing the "XXX-XXX" brand XXX-XXXs. That's so XXX.
[p|s|o]: Tom? Toms XXXXXX XXXXXX is in his XXXXXXX while playing the "XXXXXXX" brand XXXXXXXX. That's so XXX.
[p|i|o]: XXX? XXXX XXXXXX XXXXXX is in his XXXXXXX while playing the "XXXXXXX" brand XXXXXXXX. That's so XXX.
</pre>
=={{header|Go}}==
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