strbuf.h

   1 #ifndef STRBUF_H
   2 #define STRBUF_H
   3
   4 /* See Documentation/technical/api-strbuf.txt */
   5
   6 extern char strbuf_slopbuf[];
   7 struct strbuf {
   8         size_t alloc;
   9         size_t len;
  10         char *buf;
  11 };
  12
  13 #define STRBUF_INIT  { 0, 0, strbuf_slopbuf }
  14
  15 /*----- strbuf life cycle -----*/
  16 extern void strbuf_init(struct strbuf *, size_t);
  17 extern void strbuf_release(struct strbuf *);
  18 extern char *strbuf_detach(struct strbuf *, size_t *);
  19 extern void strbuf_attach(struct strbuf *, void *, size_t, size_t);
  20 static inline void strbuf_swap(struct strbuf *a, struct strbuf *b)
  21 {
  22         struct strbuf tmp = *a;
  23         *a = *b;
  24         *b = tmp;
  25 }
  26
  27 /*----- strbuf size related -----*/
  28 static inline size_t strbuf_avail(const struct strbuf *sb)
  29 {
  30         return sb->alloc ? sb->alloc - sb->len - 1 : 0;
  31 }
  32
  33 extern void strbuf_grow(struct strbuf *, size_t);
  34
  35 static inline void strbuf_setlen(struct strbuf *sb, size_t len)
  36 {
  37         if (len > (sb->alloc ? sb->alloc - 1 : 0))
  38                 die("BUG: strbuf_setlen() beyond buffer");
  39         sb->len = len;
  40         sb->buf[len] = '\0';
  41 }
  42 #define strbuf_reset(sb)  strbuf_setlen(sb, 0)
  43
  44 /*----- content related -----*/
  45 extern void strbuf_trim(struct strbuf *);
  46 extern void strbuf_rtrim(struct strbuf *);
  47 extern void strbuf_ltrim(struct strbuf *);
  48 extern int strbuf_reencode(struct strbuf *sb, const char *from, const char *to);
  49 extern void strbuf_tolower(struct strbuf *sb);
  50 extern int strbuf_cmp(const struct strbuf *, const struct strbuf *);
  51
  52 static inline int strbuf_strip_suffix(struct strbuf *sb, const char *suffix)
  53 {
  54         if (strip_suffix_mem(sb->buf, &sb->len, suffix)) {
  55                 strbuf_setlen(sb, sb->len);
  56                 return 1;
  57         } else
  58                 return 0;
  59 }
  60
  61 /*
  62  * Split str (of length slen) at the specified terminator character.
  63  * Return a null-terminated array of pointers to strbuf objects
  64  * holding the substrings.  The substrings include the terminator,
  65  * except for the last substring, which might be unterminated if the
  66  * original string did not end with a terminator.  If max is positive,
  67  * then split the string into at most max substrings (with the last
  68  * substring containing everything following the (max-1)th terminator
  69  * character).
  70  *
  71  * For lighter-weight alternatives, see string_list_split() and
  72  * string_list_split_in_place().
  73  */
  74 extern struct strbuf **strbuf_split_buf(const char *, size_t,
  75                                         int terminator, int max);
  76
  77 /*
  78  * Split a NUL-terminated string at the specified terminator
  79  * character.  See strbuf_split_buf() for more information.
  80  */
  81 static inline struct strbuf **strbuf_split_str(const char *str,
  82                                                int terminator, int max)
  83 {
  84         return strbuf_split_buf(str, strlen(str), terminator, max);
  85 }
  86
  87 /*
  88  * Split a strbuf at the specified terminator character.  See
  89  * strbuf_split_buf() for more information.
  90  */
  91 static inline struct strbuf **strbuf_split_max(const struct strbuf *sb,
  92                                                 int terminator, int max)
  93 {
  94         return strbuf_split_buf(sb->buf, sb->len, terminator, max);
  95 }
  96
  97 /*
  98  * Split a strbuf at the specified terminator character.  See
  99  * strbuf_split_buf() for more information.
 100  */
 101 static inline struct strbuf **strbuf_split(const struct strbuf *sb,
 102                                            int terminator)
 103 {
 104         return strbuf_split_max(sb, terminator, 0);
 105 }
 106
 107 /*
 108  * Free a NULL-terminated list of strbufs (for example, the return
 109  * values of the strbuf_split*() functions).
 110  */
 111 extern void strbuf_list_free(struct strbuf **);
 112
 113 /*----- add data in your buffer -----*/
 114 static inline void strbuf_addch(struct strbuf *sb, int c)
 115 {
 116         strbuf_grow(sb, 1);
 117         sb->buf[sb->len++] = c;
 118         sb->buf[sb->len] = '\0';
 119 }
 120
 121 extern void strbuf_insert(struct strbuf *, size_t pos, const void *, size_t);
 122 extern void strbuf_remove(struct strbuf *, size_t pos, size_t len);
 123
 124 /* splice pos..pos+len with given data */
 125 extern void strbuf_splice(struct strbuf *, size_t pos, size_t len,
 126                           const void *, size_t);
 127
 128 extern void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size);
 129
 130 extern void strbuf_add(struct strbuf *, const void *, size_t);
 131 static inline void strbuf_addstr(struct strbuf *sb, const char *s)
 132 {
 133         strbuf_add(sb, s, strlen(s));
 134 }
 135 static inline void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
 136 {
 137         strbuf_grow(sb, sb2->len);
 138         strbuf_add(sb, sb2->buf, sb2->len);
 139 }
 140 extern void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len);
 141
 142 typedef size_t (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context);
 143 extern void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, void *context);
 144 struct strbuf_expand_dict_entry {
 145         const char *placeholder;
 146         const char *value;
 147 };
 148 extern size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, void *context);
 149 extern void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src);
 150
 151 __attribute__((format (printf,2,3)))
 152 extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
 153 __attribute__((format (printf, 2, 3)))
 154 extern void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...);
 155 __attribute__((format (printf,2,0)))
 156 extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);
 157
 158 extern void strbuf_add_lines(struct strbuf *sb, const char *prefix, const char *buf, size_t size);
 159
 160 /*
 161  * Append s to sb, with the characters '<', '>', '&' and '"' converted
 162  * into XML entities.
 163  */
 164 extern void strbuf_addstr_xml_quoted(struct strbuf *sb, const char *s);
 165
 166 static inline void strbuf_complete_line(struct strbuf *sb)
 167 {
 168         if (sb->len && sb->buf[sb->len - 1] != '\n')
 169                 strbuf_addch(sb, '\n');
 170 }
 171
 172 extern size_t strbuf_fread(struct strbuf *, size_t, FILE *);
 173 /* XXX: if read fails, any partial read is undone */
 174 extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
 175 extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 176 extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
 177
 178 extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
 179 extern int strbuf_getline(struct strbuf *, FILE *, int);
 180 extern int strbuf_getwholeline_fd(struct strbuf *, int, int);
 181
 182 extern void stripspace(struct strbuf *buf, int skip_comments);
 183 extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
 184
 185 extern int strbuf_branchname(struct strbuf *sb, const char *name);
 186 extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
 187
 188 extern void strbuf_addstr_urlencode(struct strbuf *, const char *,
 189                                     int reserved);
 190 extern void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes);
 191
 192 __attribute__((format (printf,1,2)))
 193 extern int printf_ln(const char *fmt, ...);
 194 __attribute__((format (printf,2,3)))
 195 extern int fprintf_ln(FILE *fp, const char *fmt, ...);
 196
 197 char *xstrdup_tolower(const char *);
 198
 199 /*
 200  * Create a newly allocated string using printf format. You can do this easily
 201  * with a strbuf, but this provides a shortcut to save a few lines.
 202  */
 203 __attribute__((format (printf, 1, 0)))
 204 char *xstrvfmt(const char *fmt, va_list ap);
 205 __attribute__((format (printf, 1, 2)))
 206 char *xstrfmt(const char *fmt, ...);
 207
 208 #endif /* STRBUF_H */