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#ifndef _STRING_UTIL_H
#define _STRING_UTIL_H
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
/* like strtok(3), but without state, and doesn't modify s. Return
* value is indicated by pointer and length, not null terminator.
*
* Usage pattern:
*
* const char *tok = input;
* const char *delim = " \t";
* size_t tok_len = 0;
*
* while ((tok = strtok_len (tok + tok_len, delim, &tok_len)) != NULL) {
* // do stuff with string tok of length tok_len
* }
*/
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);
/* Return a talloced string with str sanitized.
*
* Whitespace characters (tabs and newlines) are replaced with spaces,
* non-printable characters with question marks.
*/
char *sanitize_string (const void *ctx, const char *str);
/* Construct a boolean term query with the specified prefix (e.g.,
* "id") and search term, quoting term as necessary. Specifically, if
* term contains any non-printable ASCII characters, non-ASCII
* characters, close parenthesis or double quotes, it will be enclosed
* in double quotes and any internal double quotes will be doubled
* (e.g. a"b -> "a""b"). The result will be a valid notmuch query and
* can be parsed by parse_boolean_term.
*
* Output is into buf; it may be talloc_realloced.
* Return: 0 on success, -1 on error. errno will be set to ENOMEM if
* there is an allocation failure.
*/
int make_boolean_term (void *talloc_ctx, const char *prefix, const char *term,
char **buf, size_t *len);
/* Parse a boolean term query consisting of a prefix, a colon, and a
* term that may be quoted as described for make_boolean_term. If the
* term is not quoted, then it ends at the first whitespace or close
* parenthesis. str may containing leading or trailing whitespace,
* but anything else is considered a parse error. This is compatible
* with anything produced by make_boolean_term, and supports a subset
* of the quoting styles supported by Xapian (and hence notmuch).
* *prefix_out and *term_out will be talloc'd with context ctx.
*
* Return: 0 on success, -1 on error. errno will be set to EINVAL if
* there is a parse error or ENOMEM if there is an allocation failure.
*/
int
parse_boolean_term (void *ctx, const char *str,
char **prefix_out, char **term_out);
#ifdef __cplusplus
}
#endif
#endif
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