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_cmp(const struct strbuf *, const struct strbuf *);
  49
  50 /*
  51  * Split str (of length slen) at the specified terminator character.
  52  * Return a null-terminated array of pointers to strbuf objects
  53  * holding the substrings.  The substrings include the terminator,
  54  * except for the last substring, which might be unterminated if the
  55  * original string did not end with a terminator.  If max is positive,
  56  * then split the string into at most max substrings (with the last
  57  * substring containing everything following the (max-1)th terminator
  58  * character).
  59  *
  60  * For lighter-weight alternatives, see string_list_split() and
  61  * string_list_split_in_place().
  62  */
  63 extern struct strbuf **strbuf_split_buf(const char *, size_t,
  64                                         int terminator, int max);
  65
  66 /*
  67  * Split a NUL-terminated string at the specified terminator
  68  * character.  See strbuf_split_buf() for more information.
  69  */
  70 static inline struct strbuf **strbuf_split_str(const char *str,
  71                                                int terminator, int max)
  72 {
  73         return strbuf_split_buf(str, strlen(str), terminator, max);
  74 }
  75
  76 /*
  77  * Split a strbuf at the specified terminator character.  See
  78  * strbuf_split_buf() for more information.
  79  */
  80 static inline struct strbuf **strbuf_split_max(const struct strbuf *sb,
  81                                                 int terminator, int max)
  82 {
  83         return strbuf_split_buf(sb->buf, sb->len, terminator, max);
  84 }
  85
  86 /*
  87  * Split a strbuf at the specified terminator character.  See
  88  * strbuf_split_buf() for more information.
  89  */
  90 static inline struct strbuf **strbuf_split(const struct strbuf *sb,
  91                                            int terminator)
  92 {
  93         return strbuf_split_max(sb, terminator, 0);
  94 }
  95
  96 /*
  97  * Free a NULL-terminated list of strbufs (for example, the return
  98  * values of the strbuf_split*() functions).
  99  */
 100 extern void strbuf_list_free(struct strbuf **);
 101
 102 /*----- add data in your buffer -----*/
 103 static inline void strbuf_addch(struct strbuf *sb, int c)
 104 {
 105         strbuf_grow(sb, 1);
 106         sb->buf[sb->len++] = c;
 107         sb->buf[sb->len] = '\0';
 108 }
 109
 110 extern void strbuf_insert(struct strbuf *, size_t pos, const void *, size_t);
 111 extern void strbuf_remove(struct strbuf *, size_t pos, size_t len);
 112
 113 /* splice pos..pos+len with given data */
 114 extern void strbuf_splice(struct strbuf *, size_t pos, size_t len,
 115                           const void *, size_t);
 116
 117 extern void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size);
 118
 119 extern void strbuf_add(struct strbuf *, const void *, size_t);
 120 static inline void strbuf_addstr(struct strbuf *sb, const char *s)
 121 {
 122         strbuf_add(sb, s, strlen(s));
 123 }
 124 static inline void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
 125 {
 126         strbuf_grow(sb, sb2->len);
 127         strbuf_add(sb, sb2->buf, sb2->len);
 128 }
 129 extern void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len);
 130
 131 typedef size_t (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context);
 132 extern void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, void *context);
 133 struct strbuf_expand_dict_entry {
 134         const char *placeholder;
 135         const char *value;
 136 };
 137 extern size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, void *context);
 138 extern void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src);
 139
 140 __attribute__((format (printf,2,3)))
 141 extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
 142 __attribute__((format (printf, 2, 3)))
 143 extern void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...);
 144 __attribute__((format (printf,2,0)))
 145 extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);
 146
 147 extern void strbuf_add_lines(struct strbuf *sb, const char *prefix, const char *buf, size_t size);
 148
 149 /*
 150  * Append s to sb, with the characters '<', '>', '&' and '"' converted
 151  * into XML entities.
 152  */
 153 extern void strbuf_addstr_xml_quoted(struct strbuf *sb, const char *s);
 154
 155 static inline void strbuf_complete_line(struct strbuf *sb)
 156 {
 157         if (sb->len && sb->buf[sb->len - 1] != '\n')
 158                 strbuf_addch(sb, '\n');
 159 }
 160
 161 extern size_t strbuf_fread(struct strbuf *, size_t, FILE *);
 162 /* XXX: if read fails, any partial read is undone */
 163 extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
 164 extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 165 extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
 166
 167 extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
 168 extern int strbuf_getline(struct strbuf *, FILE *, int);
 169 extern int strbuf_getwholeline_fd(struct strbuf *, int, int);
 170
 171 extern void stripspace(struct strbuf *buf, int skip_comments);
 172 extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
 173
 174 extern int strbuf_branchname(struct strbuf *sb, const char *name);
 175 extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
 176
 177 extern void strbuf_addstr_urlencode(struct strbuf *, const char *,
 178                                     int reserved);
 179 extern void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes);
 180
 181 __attribute__((format (printf,1,2)))
 182 extern int printf_ln(const char *fmt, ...);
 183 __attribute__((format (printf,2,3)))
 184 extern int fprintf_ln(FILE *fp, const char *fmt, ...);
 185
 186 #endif /* STRBUF_H */