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cec4a87539
Stripping trailing character is not that uncommon operation. Particularly, the next patch has to perform it as well. Lets move it to the separate function to avoid code duplication. Also the new function has a little improvement: if the character to strip is repeated several times in the end of a string, function strips them all. Signed-off-by: Yuri Volchkov <yuri.volchkov@gmail.com>
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
#ifndef _STRING_UTIL_H
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#define _STRING_UTIL_H
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* like strtok(3), but without state, and doesn't modify s. Return
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* value is indicated by pointer and length, not null terminator.
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*
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* Usage pattern:
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*
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* const char *tok = input;
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* const char *delim = " \t";
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* size_t tok_len = 0;
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*
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* while ((tok = strtok_len (tok + tok_len, delim, &tok_len)) != NULL) {
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* // do stuff with string tok of length tok_len
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* }
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*/
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char *strtok_len (char *s, const char *delim, size_t *len);
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/* Const version of strtok_len. */
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const char *strtok_len_c (const char *s, const char *delim, size_t *len);
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/* Return a talloced string with str sanitized.
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*
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* Whitespace characters (tabs and newlines) are replaced with spaces,
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* non-printable characters with question marks.
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*/
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char *sanitize_string (const void *ctx, const char *str);
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/* Construct a boolean term query with the specified prefix (e.g.,
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* "id") and search term, quoting term as necessary. Specifically, if
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* term contains any non-printable ASCII characters, non-ASCII
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* characters, close parenthesis or double quotes, it will be enclosed
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* in double quotes and any internal double quotes will be doubled
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* (e.g. a"b -> "a""b"). The result will be a valid notmuch query and
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* can be parsed by parse_boolean_term.
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*
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* Output is into buf; it may be talloc_realloced.
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* Return: 0 on success, -1 on error. errno will be set to ENOMEM if
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* there is an allocation failure.
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*/
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int make_boolean_term (void *talloc_ctx, const char *prefix, const char *term,
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char **buf, size_t *len);
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/* Parse a boolean term query consisting of a prefix, a colon, and a
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* term that may be quoted as described for make_boolean_term. If the
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* term is not quoted, then it ends at the first whitespace or close
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* parenthesis. str may containing leading or trailing whitespace,
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* but anything else is considered a parse error. This is compatible
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* with anything produced by make_boolean_term, and supports a subset
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* of the quoting styles supported by Xapian (and hence notmuch).
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* *prefix_out and *term_out will be talloc'd with context ctx.
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*
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* Return: 0 on success, -1 on error. errno will be set to EINVAL if
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* there is a parse error or ENOMEM if there is an allocation failure.
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*/
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int
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parse_boolean_term (void *ctx, const char *str,
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char **prefix_out, char **term_out);
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/* strcmp that handles NULL strings; in strcmp terms a NULL string is
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* considered to be less than a non-NULL string.
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*/
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int strcmp_null (const char *s1, const char *s2);
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/* GLib GEqualFunc compatible strcasecmp wrapper */
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int strcase_equal (const void *a, const void *b);
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/* GLib GHashFunc compatible case insensitive hash function */
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unsigned int strcase_hash (const void *ptr);
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void strip_trailing (char *str, char ch);
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#ifdef __cplusplus
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}
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#endif
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#endif
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