2 * UCW Library -- String Routines
4 * (c) 2006 Pavel Charvat <pchar@ucw.cz>
5 * (c) 2007--2012 Martin Mares <mj@ucw.cz>
7 * This software may be freely distributed and used according to the terms
8 * of the GNU Lesser General Public License.
14 #ifdef CONFIG_UCW_CLEAN_ABI
15 #define hex_to_mem ucw_hex_to_mem
16 #define mem_to_hex ucw_mem_to_hex
17 #define str_count_char ucw_str_count_char
18 #define str_format_flags ucw_str_format_flags
19 #define str_has_prefix ucw_str_has_prefix
20 #define str_has_suffix ucw_str_has_suffix
21 #define str_hier_prefix ucw_str_hier_prefix
22 #define str_hier_suffix ucw_str_hier_suffix
23 #define str_match_pattern ucw_str_match_pattern
24 #define str_match_pattern_nocase ucw_str_match_pattern_nocase
25 #define str_sepsplit ucw_str_sepsplit
26 #define str_unesc ucw_str_unesc
27 #define str_wordsplit ucw_str_wordsplit
28 #define strnlen ucw_strnlen
34 uns strnlen(const char *str, uns n);
38 * Format a set of flag bits. When the i-th bit of @flags is 1,
39 * set the i-th character of @dest to @fmt[i], otherwise to '-'.
41 char *str_format_flags(char *dest, const char *fmt, uns flags);
43 /** Counts occurrences of @chr in @str. **/
44 uns str_count_char(const char *str, uns chr);
49 * Decode a string with backslash escape sequences as in C99 strings.
50 * It is safe to pass @dest equal to @src.
52 char *str_unesc(char *dest, const char *src);
57 * Split @str to at most @max fields separated by @sep. Occurrences of the
58 * separator are rewritten to string terminators, @rec[i] is set to point
59 * to the i-th field. The total number of fields is returned.
61 * When there are more than @max fields in @str, the first @max fields
62 * are processed and -1 is returned.
64 int str_sepsplit(char *str, uns sep, char **rec, uns max);
67 * Split @str to words separated by white-space characters. The spaces
68 * are replaced by string terminators, @rec[i] is set to point to the
69 * i-th field. The total number of fields is returned.
71 * When there are more than @max fields in @str, the first @max fields
72 * are processed and -1 is returned.
74 * Fields surrounded by double quotes are also recognized. They can contain
75 * spaces, but no mechanism for escaping embedded quotes is defined.
77 int str_wordsplit(char *str, char **rec, uns max);
79 /* str-(i)match.c: Matching of shell patterns */
82 * Test whether the string @str matches the shell-like pattern @patt. Only
83 * "*" and "?" meta-characters are supported.
85 int str_match_pattern(const char *patt, const char *str);
87 /** A case-insensitive version of @str_match_pattern(). **/
88 int str_match_pattern_nocase(const char *patt, const char *str);
93 * Create a hexdump of a memory block of @bytes bytes starting at @src.
94 * The @flags contain an optional separator of bytes (0 if bytes should
95 * not be separated), possibly OR-ed with `MEM_TO_HEX_UPCASE` when upper-case
96 * characters should be used.
98 void mem_to_hex(char *dest, const byte *src, uns bytes, uns flags);
101 * An inverse function to @mem_to_hex(). Takes a hexdump of at most @max_bytes
102 * bytes and stores the bytes to a buffer starting at @dest. Returns a pointer
103 * at the first character after the dump.
105 const char *hex_to_mem(byte *dest, const char *src, uns max_bytes, uns flags);
107 // Bottom 8 bits of flags are an optional separator of bytes, the rest is:
108 #define MEM_TO_HEX_UPCASE 0x100
112 int str_has_prefix(const char *str, const char *prefix); /** Tests if @str starts with @prefix. **/
113 int str_has_suffix(const char *str, const char *suffix); /** Tests if @str ends with @suffix. **/
116 * Let @str and @prefix be hierarchical names with components separated by
117 * a character @sep. Returns true if @str starts with @prefix, respecting
118 * component boundaries.
120 * For example, when @sep is '/' and @str is "/usr/local/bin", then:
122 * - "/usr/local" is a prefix
123 * - "/usr/local/" is a prefix, too
124 * - "/usr/loc" is not,
125 * - "/usr/local/bin" is a prefix,
126 * - "/usr/local/bin/" is not,
130 int str_hier_prefix(const char *str, const char *prefix, uns sep);
131 int str_hier_suffix(const char *str, const char *suffix, uns sep); /** Like @str_hier_prefix(), but for suffixes. **/