diff options
Diffstat (limited to 'strbuf.c')
| -rw-r--r-- | strbuf.c | 118 |
1 files changed, 98 insertions, 20 deletions
@@ -63,11 +63,15 @@ void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc) void strbuf_grow(struct strbuf *sb, size_t extra) { - if (sb->len + extra + 1 <= sb->len) + int new_buf = !sb->alloc; + if (unsigned_add_overflows(extra, 1) || + unsigned_add_overflows(sb->len, extra + 1)) die("you want to use way too much memory"); - if (!sb->alloc) + if (new_buf) sb->buf = NULL; ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc); + if (new_buf) + sb->buf[0] = '\0'; } void strbuf_trim(struct strbuf *sb) @@ -100,24 +104,27 @@ void strbuf_ltrim(struct strbuf *sb) sb->buf[sb->len] = '\0'; } -struct strbuf **strbuf_split(const struct strbuf *sb, int delim) +struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max) { int alloc = 2, pos = 0; - char *n, *p; + const char *n, *p; struct strbuf **ret; struct strbuf *t; ret = xcalloc(alloc, sizeof(struct strbuf *)); - p = n = sb->buf; - while (n < sb->buf + sb->len) { + p = n = str; + while (n < str + slen) { int len; - n = memchr(n, delim, sb->len - (n - sb->buf)); + if (max <= 0 || pos + 1 < max) + n = memchr(n, delim, slen - (n - str)); + else + n = NULL; if (pos + 1 >= alloc) { alloc = alloc * 2; ret = xrealloc(ret, sizeof(struct strbuf *) * alloc); } if (!n) - n = sb->buf + sb->len - 1; + n = str + slen - 1; len = n - p + 1; t = xmalloc(sizeof(struct strbuf)); strbuf_init(t, len); @@ -152,7 +159,7 @@ int strbuf_cmp(const struct strbuf *a, const struct strbuf *b) void strbuf_splice(struct strbuf *sb, size_t pos, size_t len, const void *data, size_t dlen) { - if (pos + len < pos) + if (unsigned_add_overflows(pos, len)) die("you want to use way too much memory"); if (pos > sb->len) die("`pos' is too far after the end of the buffer"); @@ -194,24 +201,29 @@ void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len) void strbuf_addf(struct strbuf *sb, const char *fmt, ...) { - int len; va_list ap; + va_start(ap, fmt); + strbuf_vaddf(sb, fmt, ap); + va_end(ap); +} + +void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap) +{ + int len; + va_list cp; if (!strbuf_avail(sb)) strbuf_grow(sb, 64); - va_start(ap, fmt); - len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); - va_end(ap); + va_copy(cp, ap); + len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp); + va_end(cp); if (len < 0) - die("your vsnprintf is broken"); + die("BUG: your vsnprintf is broken (returned %d)", len); if (len > strbuf_avail(sb)) { strbuf_grow(sb, len); - va_start(ap, fmt); len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); - va_end(ap); - if (len > strbuf_avail(sb)) { - die("this should not happen, your snprintf is broken"); - } + if (len > strbuf_avail(sb)) + die("BUG: your vsnprintf is broken (insatiable)"); } strbuf_setlen(sb, sb->len + len); } @@ -345,7 +357,6 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) { int ch; - strbuf_grow(sb, 0); if (feof(fp)) return EOF; @@ -372,6 +383,22 @@ int strbuf_getline(struct strbuf *sb, FILE *fp, int term) return 0; } +int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term) +{ + strbuf_reset(sb); + + while (1) { + char ch; + ssize_t len = xread(fd, &ch, 1); + if (len <= 0) + return EOF; + strbuf_addch(sb, ch); + if (ch == term) + break; + } + return 0; +} + int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint) { int fd, len; @@ -386,3 +413,54 @@ int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint) return len; } + +void strbuf_add_lines(struct strbuf *out, const char *prefix, + const char *buf, size_t size) +{ + while (size) { + const char *next = memchr(buf, '\n', size); + next = next ? (next + 1) : (buf + size); + strbuf_addstr(out, prefix); + strbuf_add(out, buf, next - buf); + size -= next - buf; + buf = next; + } + strbuf_complete_line(out); +} + +static int is_rfc3986_reserved(char ch) +{ + switch (ch) { + case '!': case '*': case '\'': case '(': case ')': case ';': + case ':': case '@': case '&': case '=': case '+': case '$': + case ',': case '/': case '?': case '#': case '[': case ']': + return 1; + } + return 0; +} + +static int is_rfc3986_unreserved(char ch) +{ + return isalnum(ch) || + ch == '-' || ch == '_' || ch == '.' || ch == '~'; +} + +void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len, + int reserved) +{ + strbuf_grow(sb, len); + while (len--) { + char ch = *s++; + if (is_rfc3986_unreserved(ch) || + (!reserved && is_rfc3986_reserved(ch))) + strbuf_addch(sb, ch); + else + strbuf_addf(sb, "%%%02x", ch); + } +} + +void strbuf_addstr_urlencode(struct strbuf *sb, const char *s, + int reserved) +{ + strbuf_add_urlencode(sb, s, strlen(s), reserved); +} |