diff --git a/util/string-util.c b/util/string-util.c index de8430b2..27f8a26b 100644 --- a/util/string-util.c +++ b/util/string-util.c @@ -24,6 +24,7 @@ #include #include +#include char * strtok_len (char *s, const char *delim, size_t *len) @@ -37,6 +38,28 @@ strtok_len (char *s, const char *delim, size_t *len) return *len ? s : NULL; } +const char * +strsplit_len (const char *s, char delim, size_t *len) +{ + bool escaping = false; + size_t count = 0; + + /* Skip initial unescaped delimiters */ + while (*s && *s == delim) + s++; + + while (s[count] && (escaping || s[count] != delim)) { + escaping = (s[count] == '\\'); + count++; + } + + if (count==0) + return NULL; + + *len = count; + return s; +} + const char * strtok_len_c (const char *s, const char *delim, size_t *len) { diff --git a/util/string-util.h b/util/string-util.h index fb95a740..80647c5f 100644 --- a/util/string-util.h +++ b/util/string-util.h @@ -26,6 +26,20 @@ char *strtok_len (char *s, const char *delim, size_t *len); /* Const version of strtok_len. */ const char *strtok_len_c (const char *s, const char *delim, size_t *len); +/* Simplified version of strtok_len, with a single delimiter. + * Handles escaping delimiters with \ + * Usage pattern: + * + * const char *tok = input; + * const char *delim = ';'; + * size_t tok_len = 0; + * + * while ((tok = strsplit_len (tok + tok_len, delim, &tok_len)) != NULL) { + * // do stuff with string tok of length tok_len + * } + */ +const char *strsplit_len (const char *s, char delim, size_t *len); + /* Return a talloced string with str sanitized. * * Whitespace characters (tabs and newlines) are replaced with spaces,