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MINOR: standard: add function "escape_string"

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Similar to "escape_chunk", this function tries to prefix all characters
tagged in the <map> with the <escape> character. The specified <string>
contains the input to be escaped.
This commit is contained in:
Dragan Dosen 2016-07-22 16:00:31 +02:00 committed by Willy Tarreau
parent 3146a4cde2
commit 1a5d06032b
2 changed files with 42 additions and 0 deletions
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12
include/common/standard.h
View File

@ -380,6 +380,18 @@ char *encode_chunk(char *start, char *stop,
const char escape, const fd_set *map,
const struct chunk *chunk);
/*
* Tries to prefix characters tagged in the <map> with the <escape>
* character. The input <string> must be zero-terminated. The result will
* be stored between <start> (included) and <stop> (excluded). This
* function will always try to terminate the resulting string with a '\0'
* before <stop>, and will return its position if the conversion
* completes.
*/
char *escape_string(char *start, char *stop,
const char escape, const fd_set *map,
const char *string);
/*
* Tries to prefix characters tagged in the <map> with the <escape>
* character. <chunk> contains the input to be escaped. The result will be

30
src/standard.c
View File

@ -1470,6 +1470,36 @@ char *encode_chunk(char *start, char *stop,
return start;
}
/*
* Tries to prefix characters tagged in the <map> with the <escape>
* character. The input <string> must be zero-terminated. The result will
* be stored between <start> (included) and <stop> (excluded). This
* function will always try to terminate the resulting string with a '\0'
* before <stop>, and will return its position if the conversion
* completes.
*/
char *escape_string(char *start, char *stop,
const char escape, const fd_set *map,
const char *string)
{
if (start < stop) {
stop--; /* reserve one byte for the final '\0' */
while (start < stop && *string != '\0') {
if (!FD_ISSET((unsigned char)(*string), map))
*start++ = *string;
else {
if (start + 2 >= stop)
break;
*start++ = escape;
*start++ = *string;
}
string++;
}
*start = '\0';
}
return start;
}
/*
* Tries to prefix characters tagged in the <map> with the <escape>
* character. <chunk> contains the input to be escaped. The result will be