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