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New functions to shrink a strbuf.

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These are better than my previous approach of just assigning to
sb->len, because firstly they check by assertion that the new length
is within range, and secondly they preserve the invariant that the
byte stored in the buffer just after the length runs out is \0.

Switched to using the new functions everywhere a grep could turn up
opportunities.
This commit is contained in:
Simon Tatham
2020-01-21 20:16:28 +00:00
parent 88d5948ead
commit 5891142aee
17 changed files with 45 additions and 29 deletions
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3
misc.h
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@ -73,9 +73,12 @@ strbuf *strbuf_new_nm(void);
void strbuf_free(strbuf *buf);
void *strbuf_append(strbuf *buf, size_t len);
void strbuf_shrink_to(strbuf *buf, size_t new_len);
void strbuf_shrink_by(strbuf *buf, size_t amount_to_remove);
char *strbuf_to_str(strbuf *buf); /* does free buf, but you must free result */
void strbuf_catf(strbuf *buf, const char *fmt, ...);
void strbuf_catfv(strbuf *buf, const char *fmt, va_list ap);
static inline void strbuf_clear(strbuf *buf) { strbuf_shrink_to(buf, 0); }
strbuf *strbuf_new_for_agent_query(void);
void strbuf_finalise_agent_query(strbuf *buf);