config: avoid segfault when parsing command-line config
[git/git.git] / strbuf.h
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1#ifndef STRBUF_H
2#define STRBUF_H
b449f4cf 3
e0390119 4/* See Documentation/technical/api-strbuf.txt */
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5
6#include <assert.h>
7
b315c5c0 8extern char strbuf_slopbuf[];
d1df5743 9struct strbuf {
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10 size_t alloc;
11 size_t len;
bf0f910d 12 char *buf;
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13};
14
b315c5c0 15#define STRBUF_INIT { 0, 0, strbuf_slopbuf }
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16
17/*----- strbuf life cycle -----*/
f1696ee3 18extern void strbuf_init(struct strbuf *, size_t);
b449f4cf 19extern void strbuf_release(struct strbuf *);
b315c5c0 20extern char *strbuf_detach(struct strbuf *, size_t *);
917c9a71 21extern void strbuf_attach(struct strbuf *, void *, size_t, size_t);
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22static inline void strbuf_swap(struct strbuf *a, struct strbuf *b) {
23 struct strbuf tmp = *a;
24 *a = *b;
25 *b = tmp;
26}
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27
28/*----- strbuf size related -----*/
9b200fd6 29static inline size_t strbuf_avail(const struct strbuf *sb) {
c76689df 30 return sb->alloc ? sb->alloc - sb->len - 1 : 0;
b449f4cf 31}
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32
33extern void strbuf_grow(struct strbuf *, size_t);
34
b449f4cf 35static inline void strbuf_setlen(struct strbuf *sb, size_t len) {
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36 if (!sb->alloc)
37 strbuf_grow(sb, 0);
38 assert(len < sb->alloc);
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39 sb->len = len;
40 sb->buf[len] = '\0';
b449f4cf 41}
b315c5c0 42#define strbuf_reset(sb) strbuf_setlen(sb, 0)
b449f4cf 43
f1696ee3 44/*----- content related -----*/
eacd6dc5 45extern void strbuf_trim(struct strbuf *);
f1696ee3 46extern void strbuf_rtrim(struct strbuf *);
eacd6dc5 47extern void strbuf_ltrim(struct strbuf *);
9b200fd6 48extern int strbuf_cmp(const struct strbuf *, const struct strbuf *);
eacd6dc5 49
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50extern struct strbuf **strbuf_split_max(const struct strbuf *,
51 int delim, int max);
52static inline struct strbuf **strbuf_split(const struct strbuf *sb, int delim)
53{
54 return strbuf_split_max(sb, delim, 0);
55}
eacd6dc5 56extern void strbuf_list_free(struct strbuf **);
f1696ee3 57
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58/*----- add data in your buffer -----*/
59static inline void strbuf_addch(struct strbuf *sb, int c) {
60 strbuf_grow(sb, 1);
61 sb->buf[sb->len++] = c;
62 sb->buf[sb->len] = '\0';
63}
64
f1696ee3 65extern void strbuf_insert(struct strbuf *, size_t pos, const void *, size_t);
c76689df 66extern void strbuf_remove(struct strbuf *, size_t pos, size_t len);
f1696ee3 67
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68/* splice pos..pos+len with given data */
69extern void strbuf_splice(struct strbuf *, size_t pos, size_t len,
c76689df 70 const void *, size_t);
917c9a71 71
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72extern void strbuf_add(struct strbuf *, const void *, size_t);
73static inline void strbuf_addstr(struct strbuf *sb, const char *s) {
74 strbuf_add(sb, s, strlen(s));
75}
9b200fd6 76static inline void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2) {
81d2caef 77 strbuf_grow(sb, sb2->len);
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78 strbuf_add(sb, sb2->buf, sb2->len);
79}
91db267e 80extern void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len);
b449f4cf 81
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82typedef size_t (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context);
83extern void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, void *context);
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84struct strbuf_expand_dict_entry {
85 const char *placeholder;
86 const char *value;
87};
88extern size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, void *context);
361df5df 89extern void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src);
cde75e59 90
28bea9e5 91__attribute__((format (printf,2,3)))
b449f4cf 92extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
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93__attribute__((format (printf,2,0)))
94extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);
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95
96extern size_t strbuf_fread(struct strbuf *, size_t, FILE *);
97/* XXX: if read fails, any partial read is undone */
f1696ee3 98extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
387e7e19 99extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
b11b7e13 100extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
b449f4cf 101
c7e4f0d7 102extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
e6c019d0 103extern int strbuf_getline(struct strbuf *, FILE *, int);
d1df5743 104
6d69b6f6 105extern void stripspace(struct strbuf *buf, int skip_comments);
7198203a 106extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
6d69b6f6 107
a552de75 108extern int strbuf_branchname(struct strbuf *sb, const char *name);
a2fab531 109extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
a552de75 110
d1df5743 111#endif /* STRBUF_H */