scrcpy/app/src/util/str.h

#ifndef SC_STR_H
#define SC_STR_H

#include "common.h"

#include <stdbool.h>
#include <stddef.h>

/**
 * Like strncpy(), except:
 *  - it copies at most n-1 chars
 *  - the dest string is nul-terminated
 *  - it does not write useless bytes if strlen(src) < n
 *  - it returns the number of chars actually written (max n-1) if src has
 *    been copied completely, or n if src has been truncated
 */
size_t
sc_strncpy(char *dest, const char *src, size_t n);

/**
 * Join tokens by separator `sep` into `dst`
 *
 * Return the number of chars actually written (max n-1) if no truncation
 * occurred, or n if truncated.
 */
size_t
sc_str_join(char *dst, const char *const tokens[], char sep, size_t n);

/**
 * Quote a string
 *
 * Return a new allocated string, surrounded with quotes (`"`).
 */
char *
sc_str_quote(const char *src);

/**
 * Parse `s` as an integer into `out`
 *
 * Return true if the conversion succeeded, false otherwise.
 */
bool
sc_str_parse_integer(const char *s, long *out);

/**
 * Parse `s` as integers separated by `sep` (for example `1234:2000`) into `out`
 *
 * Returns the number of integers on success, 0 on failure.
 */
size_t
sc_str_parse_integers(const char *s, const char sep, size_t max_items,
                      long *out);

/**
 * Parse `s` as an integer into `out`
 *
 * Like `sc_str_parse_integer()`, but accept 'k'/'K' (x1000) and 'm'/'M'
 * (x1000000) as suffixes.
 *
 * Return true if the conversion succeeded, false otherwise.
 */
bool
sc_str_parse_integer_with_suffix(const char *s, long *out);

/**
 * Search `s` in the list separated by `sep`
 *
 * For example, sc_str_list_contains("a,bc,def", ',', "bc") returns true.
 */
bool
sc_str_list_contains(const char *list, char sep, const char *s);

/**
 * Return the index to truncate a UTF-8 string at a valid position
 */
size_t
sc_str_utf8_truncation_index(const char *utf8, size_t max_len);

#ifdef _WIN32
/**
 * Convert a UTF-8 string to a wchar_t string
 *
 * Return the new allocated string, to be freed by the caller.
 */
wchar_t *
sc_str_to_wchars(const char *utf8);

/**
 * Convert a wchar_t string to a UTF-8 string
 *
 * Return the new allocated string, to be freed by the caller.
 */
char *
sc_str_from_wchars(const wchar_t *s);
#endif

/**
 * Wrap input lines to fit in `columns` columns
 *
 * Break input lines at word boundaries (spaces) so that they fit in `columns`
 * columns, left-indented by `indent` spaces.
 */
char *
sc_str_wrap_lines(const char *input, unsigned columns, unsigned indent);

/**
 * Truncate the data after the first line
 *
 * An '\0' is always written at the end of the data, even if no newline
 * character is encountered.
 *
 * Return the size of the resulting line.
 */
size_t
sc_str_truncate_first_line(char *data, size_t len);

#endif