[thirdparty/git.git] / strbuf.c

#include "cache.h"
#include "refs.h"

int prefixcmp(const char *str, const char *prefix)
{
	for (; ; str++, prefix++)
		if (!*prefix)
			return 0;
		else if (*str != *prefix)
			return (unsigned char)*prefix - (unsigned char)*str;
}

int suffixcmp(const char *str, const char *suffix)
{
	int len = strlen(str), suflen = strlen(suffix);
	if (len < suflen)
		return -1;
	else
		return strcmp(str + len - suflen, suffix);
}

/*
 * Used as the default ->buf value, so that people can always assume
 * buf is non NULL and ->buf is NUL terminated even for a freshly
 * initialized strbuf.
 */
char strbuf_slopbuf[1];

void strbuf_init(struct strbuf *sb, size_t hint)
{
	sb->alloc = sb->len = 0;
	sb->buf = strbuf_slopbuf;
	if (hint)
		strbuf_grow(sb, hint);
}

void strbuf_release(struct strbuf *sb)
{
	if (sb->alloc) {
		free(sb->buf);
		strbuf_init(sb, 0);
	}
}

char *strbuf_detach(struct strbuf *sb, size_t *sz)
{
	char *res;
	strbuf_grow(sb, 0);
	res = sb->buf;
	if (sz)
		*sz = sb->len;
	strbuf_init(sb, 0);
	return res;
}

void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
{
	strbuf_release(sb);
	sb->buf   = buf;
	sb->len   = len;
	sb->alloc = alloc;
	strbuf_grow(sb, 0);
	sb->buf[sb->len] = '\0';
}

void strbuf_grow(struct strbuf *sb, size_t extra)
{
	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 (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)
{
	char *b = sb->buf;
	while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
		sb->len--;
	while (sb->len > 0 && isspace(*b)) {
		b++;
		sb->len--;
	}
	memmove(sb->buf, b, sb->len);
	sb->buf[sb->len] = '\0';
}
void strbuf_rtrim(struct strbuf *sb)
{
	while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
		sb->len--;
	sb->buf[sb->len] = '\0';
}

void strbuf_ltrim(struct strbuf *sb)
{
	char *b = sb->buf;
	while (sb->len > 0 && isspace(*b)) {
		b++;
		sb->len--;
	}
	memmove(sb->buf, b, sb->len);
	sb->buf[sb->len] = '\0';
}

struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max)
{
	int alloc = 2, pos = 0;
	const char *n, *p;
	struct strbuf **ret;
	struct strbuf *t;

	ret = xcalloc(alloc, sizeof(struct strbuf *));
	p = n = str;
	while (n < str + slen) {
		int len;
		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 = str + slen - 1;
		len = n - p + 1;
		t = xmalloc(sizeof(struct strbuf));
		strbuf_init(t, len);
		strbuf_add(t, p, len);
		ret[pos] = t;
		ret[++pos] = NULL;
		p = ++n;
	}
	return ret;
}

void strbuf_list_free(struct strbuf **sbs)
{
	struct strbuf **s = sbs;

	while (*s) {
		strbuf_release(*s);
		free(*s++);
	}
	free(sbs);
}

int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
{
	int len = a->len < b->len ? a->len: b->len;
	int cmp = memcmp(a->buf, b->buf, len);
	if (cmp)
		return cmp;
	return a->len < b->len ? -1: a->len != b->len;
}

void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
				   const void *data, size_t dlen)
{
	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");
	if (pos + len > sb->len)
		die("`pos + len' is too far after the end of the buffer");

	if (dlen >= len)
		strbuf_grow(sb, dlen - len);
	memmove(sb->buf + pos + dlen,
			sb->buf + pos + len,
			sb->len - pos - len);
	memcpy(sb->buf + pos, data, dlen);
	strbuf_setlen(sb, sb->len + dlen - len);
}

void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
{
	strbuf_splice(sb, pos, 0, data, len);
}

void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
{
	strbuf_splice(sb, pos, len, NULL, 0);
}

void strbuf_add(struct strbuf *sb, const void *data, size_t len)
{
	strbuf_grow(sb, len);
	memcpy(sb->buf + sb->len, data, len);
	strbuf_setlen(sb, sb->len + len);
}

void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
{
	strbuf_grow(sb, len);
	memcpy(sb->buf + sb->len, sb->buf + pos, len);
	strbuf_setlen(sb, sb->len + len);
}

void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
{
	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_copy(cp, ap);
	len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
	va_end(cp);
	if (len < 0)
		die("BUG: your vsnprintf is broken (returned %d)", len);
	if (len > strbuf_avail(sb)) {
		strbuf_grow(sb, len);
		len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
		if (len > strbuf_avail(sb))
			die("BUG: your vsnprintf is broken (insatiable)");
	}
	strbuf_setlen(sb, sb->len + len);
}

void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
		   void *context)
{
	for (;;) {
		const char *percent;
		size_t consumed;

		percent = strchrnul(format, '%');
		strbuf_add(sb, format, percent - format);
		if (!*percent)
			break;
		format = percent + 1;

		if (*format == '%') {
			strbuf_addch(sb, '%');
			format++;
			continue;
		}

		consumed = fn(sb, format, context);
		if (consumed)
			format += consumed;
		else
			strbuf_addch(sb, '%');
	}
}

size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
		void *context)
{
	struct strbuf_expand_dict_entry *e = context;
	size_t len;

	for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
		if (!strncmp(placeholder, e->placeholder, len)) {
			if (e->value)
				strbuf_addstr(sb, e->value);
			return len;
		}
	}
	return 0;
}

void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
{
	int i, len = src->len;

	for (i = 0; i < len; i++) {
		if (src->buf[i] == '%')
			strbuf_addch(dst, '%');
		strbuf_addch(dst, src->buf[i]);
	}
}

size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
{
	size_t res;
	size_t oldalloc = sb->alloc;

	strbuf_grow(sb, size);
	res = fread(sb->buf + sb->len, 1, size, f);
	if (res > 0)
		strbuf_setlen(sb, sb->len + res);
	else if (oldalloc == 0)
		strbuf_release(sb);
	return res;
}

ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
{
	size_t oldlen = sb->len;
	size_t oldalloc = sb->alloc;

	strbuf_grow(sb, hint ? hint : 8192);
	for (;;) {
		ssize_t cnt;

		cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
		if (cnt < 0) {
			if (oldalloc == 0)
				strbuf_release(sb);
			else
				strbuf_setlen(sb, oldlen);
			return -1;
		}
		if (!cnt)
			break;
		sb->len += cnt;
		strbuf_grow(sb, 8192);
	}

	sb->buf[sb->len] = '\0';
	return sb->len - oldlen;
}

#define STRBUF_MAXLINK (2*PATH_MAX)

int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
{
	size_t oldalloc = sb->alloc;

	if (hint < 32)
		hint = 32;

	while (hint < STRBUF_MAXLINK) {
		int len;

		strbuf_grow(sb, hint);
		len = readlink(path, sb->buf, hint);
		if (len < 0) {
			if (errno != ERANGE)
				break;
		} else if (len < hint) {
			strbuf_setlen(sb, len);
			return 0;
		}

		/* .. the buffer was too small - try again */
		hint *= 2;
	}
	if (oldalloc == 0)
		strbuf_release(sb);
	return -1;
}

int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
{
	int ch;

	if (feof(fp))
		return EOF;

	strbuf_reset(sb);
	while ((ch = fgetc(fp)) != EOF) {
		strbuf_grow(sb, 1);
		sb->buf[sb->len++] = ch;
		if (ch == term)
			break;
	}
	if (ch == EOF && sb->len == 0)
		return EOF;

	sb->buf[sb->len] = '\0';
	return 0;
}

int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
{
	if (strbuf_getwholeline(sb, fp, term))
		return EOF;
	if (sb->buf[sb->len-1] == term)
		strbuf_setlen(sb, sb->len-1);
	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;

	fd = open(path, O_RDONLY);
	if (fd < 0)
		return -1;
	len = strbuf_read(sb, fd, hint);
	close(fd);
	if (len < 0)
		return -1;

	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 == '~';
}

static 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);
}

int printf_ln(const char *fmt, ...)
{
	int ret;
	va_list ap;
	va_start(ap, fmt);
	ret = vprintf(fmt, ap);
	va_end(ap);
	if (ret < 0 || putchar('\n') == EOF)
		return -1;
	return ret + 1;
}

int fprintf_ln(FILE *fp, const char *fmt, ...)
{
	int ret;
	va_list ap;
	va_start(ap, fmt);
	ret = vfprintf(fp, fmt, ap);
	va_end(ap);
	if (ret < 0 || putc('\n', fp) == EOF)
		return -1;
	return ret + 1;
}
Commit	Line	Data
812666c8	1	#include "cache.h"
a2fab531	2	#include "refs.h"
d1df5743	3
698a68be JH	4	int prefixcmp(const char str, const char prefix)
	5	{
	6	for (; ; str++, prefix++)
	7	if (!*prefix)
	8	return 0;
	9	else if (str != prefix)
	10	return (unsigned char)prefix - (unsigned char)str;
	11	}
	12
8cc5b290 AP	13	int suffixcmp(const char str, const char suffix)
	14	{
	15	int len = strlen(str), suflen = strlen(suffix);
	16	if (len < suflen)
	17	return -1;
	18	else
	19	return strcmp(str + len - suflen, suffix);
	20	}
	21
b315c5c0 PH	22	/*
	23	* Used as the default ->buf value, so that people can always assume
	24	* buf is non NULL and ->buf is NUL terminated even for a freshly
	25	* initialized strbuf.
	26	*/
	27	char strbuf_slopbuf[1];
	28
917c9a71 PH	29	void strbuf_init(struct strbuf *sb, size_t hint)
917c9a71 PH	30	{
b315c5c0 PH	31	sb->alloc = sb->len = 0;
b315c5c0 PH	32	sb->buf = strbuf_slopbuf;
8c74ef1e	33	if (hint)
f1696ee3	34	strbuf_grow(sb, hint);
d1df5743 JH	35	}
d1df5743 JH	36
917c9a71 PH	37	void strbuf_release(struct strbuf *sb)
917c9a71 PH	38	{
b315c5c0 PH	39	if (sb->alloc) {
	40	free(sb->buf);
	41	strbuf_init(sb, 0);
	42	}
b449f4cf PH	43	}
b449f4cf PH	44
b315c5c0	45	char strbuf_detach(struct strbuf sb, size_t *sz)
917c9a71	46	{
08ad56f3 JK	47	char *res;
	48	strbuf_grow(sb, 0);
	49	res = sb->buf;
b315c5c0 PH	50	if (sz)
b315c5c0 PH	51	*sz = sb->len;
f1696ee3	52	strbuf_init(sb, 0);
b449f4cf PH	53	return res;
	54	}
	55
917c9a71 PH	56	void strbuf_attach(struct strbuf sb, void buf, size_t len, size_t alloc)
	57	{
	58	strbuf_release(sb);
	59	sb->buf = buf;
	60	sb->len = len;
	61	sb->alloc = alloc;
	62	strbuf_grow(sb, 0);
	63	sb->buf[sb->len] = '\0';
	64	}
	65
	66	void strbuf_grow(struct strbuf *sb, size_t extra)
	67	{
8c74ef1e	68	int new_buf = !sb->alloc;
1368f650 JN	69	if (unsigned_add_overflows(extra, 1) \|\|
1368f650 JN	70	unsigned_add_overflows(sb->len, extra + 1))
b449f4cf	71	die("you want to use way too much memory");
8c74ef1e	72	if (new_buf)
b315c5c0	73	sb->buf = NULL;
b449f4cf	74	ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
8c74ef1e TR	75	if (new_buf)
8c74ef1e TR	76	sb->buf[0] = '\0';
b449f4cf PH	77	}
b449f4cf PH	78
eacd6dc5 LS	79	void strbuf_trim(struct strbuf *sb)
	80	{
	81	char *b = sb->buf;
	82	while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
	83	sb->len--;
	84	while (sb->len > 0 && isspace(*b)) {
	85	b++;
	86	sb->len--;
	87	}
	88	memmove(sb->buf, b, sb->len);
	89	sb->buf[sb->len] = '\0';
	90	}
f1696ee3 PH	91	void strbuf_rtrim(struct strbuf *sb)
	92	{
	93	while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
	94	sb->len--;
	95	sb->buf[sb->len] = '\0';
	96	}
	97
eacd6dc5 LS	98	void strbuf_ltrim(struct strbuf *sb)
	99	{
	100	char *b = sb->buf;
	101	while (sb->len > 0 && isspace(*b)) {
	102	b++;
	103	sb->len--;
	104	}
	105	memmove(sb->buf, b, sb->len);
	106	sb->buf[sb->len] = '\0';
	107	}
	108
2f1d9e2b	109	struct strbuf *strbuf_split_buf(const char str, size_t slen, int delim, int max)
eacd6dc5 LS	110	{
eacd6dc5 LS	111	int alloc = 2, pos = 0;
2f1d9e2b	112	const char n, p;
eacd6dc5 LS	113	struct strbuf **ret;
	114	struct strbuf *t;
	115
	116	ret = xcalloc(alloc, sizeof(struct strbuf *));
2f1d9e2b JK	117	p = n = str;
2f1d9e2b JK	118	while (n < str + slen) {
eacd6dc5	119	int len;
28fc3a68	120	if (max <= 0 \|\| pos + 1 < max)
2f1d9e2b	121	n = memchr(n, delim, slen - (n - str));
28fc3a68 JK	122	else
28fc3a68 JK	123	n = NULL;
eacd6dc5 LS	124	if (pos + 1 >= alloc) {
	125	alloc = alloc * 2;
	126	ret = xrealloc(ret, sizeof(struct strbuf ) alloc);
	127	}
	128	if (!n)
2f1d9e2b	129	n = str + slen - 1;
eacd6dc5 LS	130	len = n - p + 1;
	131	t = xmalloc(sizeof(struct strbuf));
	132	strbuf_init(t, len);
	133	strbuf_add(t, p, len);
	134	ret[pos] = t;
	135	ret[++pos] = NULL;
	136	p = ++n;
	137	}
	138	return ret;
	139	}
	140
	141	void strbuf_list_free(struct strbuf **sbs)
	142	{
	143	struct strbuf **s = sbs;
	144
	145	while (*s) {
	146	strbuf_release(*s);
	147	free(*s++);
	148	}
	149	free(sbs);
	150	}
	151
9b200fd6	152	int strbuf_cmp(const struct strbuf a, const struct strbuf b)
45f66f64	153	{
8f024655 AR	154	int len = a->len < b->len ? a->len: b->len;
	155	int cmp = memcmp(a->buf, b->buf, len);
	156	if (cmp)
	157	return cmp;
	158	return a->len < b->len ? -1: a->len != b->len;
45f66f64 PH	159	}
45f66f64 PH	160
917c9a71 PH	161	void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
	162	const void *data, size_t dlen)
	163	{
1368f650	164	if (unsigned_add_overflows(pos, len))
917c9a71 PH	165	die("you want to use way too much memory");
	166	if (pos > sb->len)
	167	die("`pos' is too far after the end of the buffer");
	168	if (pos + len > sb->len)
	169	die("`pos + len' is too far after the end of the buffer");
	170
	171	if (dlen >= len)
	172	strbuf_grow(sb, dlen - len);
	173	memmove(sb->buf + pos + dlen,
	174	sb->buf + pos + len,
	175	sb->len - pos - len);
	176	memcpy(sb->buf + pos, data, dlen);
	177	strbuf_setlen(sb, sb->len + dlen - len);
	178	}
	179
c76689df PH	180	void strbuf_insert(struct strbuf sb, size_t pos, const void data, size_t len)
	181	{
	182	strbuf_splice(sb, pos, 0, data, len);
	183	}
	184
	185	void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
	186	{
	187	strbuf_splice(sb, pos, len, NULL, 0);
	188	}
	189
917c9a71 PH	190	void strbuf_add(struct strbuf sb, const void data, size_t len)
917c9a71 PH	191	{
b449f4cf PH	192	strbuf_grow(sb, len);
	193	memcpy(sb->buf + sb->len, data, len);
	194	strbuf_setlen(sb, sb->len + len);
	195	}
	196
91db267e RS	197	void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
	198	{
	199	strbuf_grow(sb, len);
	200	memcpy(sb->buf + sb->len, sb->buf + pos, len);
	201	strbuf_setlen(sb, sb->len + len);
	202	}
	203
917c9a71 PH	204	void strbuf_addf(struct strbuf sb, const char fmt, ...)
917c9a71 PH	205	{
b449f4cf	206	va_list ap;
ebeb6090 JK	207	va_start(ap, fmt);
	208	strbuf_vaddf(sb, fmt, ap);
	209	va_end(ap);
	210	}
	211
	212	void strbuf_vaddf(struct strbuf sb, const char fmt, va_list ap)
	213	{
	214	int len;
	215	va_list cp;
b449f4cf	216
f141bd80 SP	217	if (!strbuf_avail(sb))
f141bd80 SP	218	strbuf_grow(sb, 64);
ebeb6090 JK	219	va_copy(cp, ap);
	220	len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
	221	va_end(cp);
f141bd80	222	if (len < 0)
ebeb6090	223	die("BUG: your vsnprintf is broken (returned %d)", len);
f1696ee3	224	if (len > strbuf_avail(sb)) {
b449f4cf	225	strbuf_grow(sb, len);
b449f4cf	226	len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
ebeb6090 JK	227	if (len > strbuf_avail(sb))
ebeb6090 JK	228	die("BUG: your vsnprintf is broken (insatiable)");
b449f4cf PH	229	}
b449f4cf PH	230	strbuf_setlen(sb, sb->len + len);
d1df5743 JH	231	}
d1df5743 JH	232
c3a670de MC	233	void strbuf_expand(struct strbuf sb, const char format, expand_fn_t fn,
c3a670de MC	234	void *context)
cde75e59 RS	235	{
cde75e59 RS	236	for (;;) {
c3a670de MC	237	const char *percent;
c3a670de MC	238	size_t consumed;
cde75e59 RS	239
	240	percent = strchrnul(format, '%');
	241	strbuf_add(sb, format, percent - format);
	242	if (!*percent)
	243	break;
	244	format = percent + 1;
	245
0a0416a3 JK	246	if (*format == '%') {
	247	strbuf_addch(sb, '%');
	248	format++;
	249	continue;
	250	}
	251
c3a670de MC	252	consumed = fn(sb, format, context);
	253	if (consumed)
	254	format += consumed;
	255	else
cde75e59 RS	256	strbuf_addch(sb, '%');
	257	}
	258	}
	259
9b864e73 RS	260	size_t strbuf_expand_dict_cb(struct strbuf sb, const char placeholder,
	261	void *context)
	262	{
	263	struct strbuf_expand_dict_entry *e = context;
	264	size_t len;
	265
	266	for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
	267	if (!strncmp(placeholder, e->placeholder, len)) {
	268	if (e->value)
	269	strbuf_addstr(sb, e->value);
	270	return len;
	271	}
	272	}
	273	return 0;
	274	}
	275
361df5df JK	276	void strbuf_addbuf_percentquote(struct strbuf dst, const struct strbuf src)
	277	{
	278	int i, len = src->len;
	279
	280	for (i = 0; i < len; i++) {
	281	if (src->buf[i] == '%')
	282	strbuf_addch(dst, '%');
	283	strbuf_addch(dst, src->buf[i]);
	284	}
	285	}
	286
917c9a71 PH	287	size_t strbuf_fread(struct strbuf sb, size_t size, FILE f)
917c9a71 PH	288	{
b449f4cf	289	size_t res;
2fc64700	290	size_t oldalloc = sb->alloc;
b449f4cf PH	291
	292	strbuf_grow(sb, size);
	293	res = fread(sb->buf + sb->len, 1, size, f);
2fc64700	294	if (res > 0)
b449f4cf	295	strbuf_setlen(sb, sb->len + res);
6651c3f7	296	else if (oldalloc == 0)
2fc64700	297	strbuf_release(sb);
b449f4cf	298	return res;
d1df5743 JH	299	}
d1df5743 JH	300
f1696ee3	301	ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
b449f4cf PH	302	{
b449f4cf PH	303	size_t oldlen = sb->len;
2fc64700	304	size_t oldalloc = sb->alloc;
b449f4cf	305
f1696ee3	306	strbuf_grow(sb, hint ? hint : 8192);
b449f4cf PH	307	for (;;) {
	308	ssize_t cnt;
	309
b449f4cf PH	310	cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
b449f4cf PH	311	if (cnt < 0) {
2fc64700 RS	312	if (oldalloc == 0)
	313	strbuf_release(sb);
	314	else
	315	strbuf_setlen(sb, oldlen);
b449f4cf PH	316	return -1;
	317	}
	318	if (!cnt)
	319	break;
	320	sb->len += cnt;
f1696ee3	321	strbuf_grow(sb, 8192);
b449f4cf PH	322	}
	323
	324	sb->buf[sb->len] = '\0';
	325	return sb->len - oldlen;
d1df5743 JH	326	}
d1df5743 JH	327
b11b7e13 LT	328	#define STRBUF_MAXLINK (2*PATH_MAX)
	329
	330	int strbuf_readlink(struct strbuf sb, const char path, size_t hint)
	331	{
2fc64700 RS	332	size_t oldalloc = sb->alloc;
2fc64700 RS	333
b11b7e13 LT	334	if (hint < 32)
	335	hint = 32;
	336
	337	while (hint < STRBUF_MAXLINK) {
	338	int len;
	339
	340	strbuf_grow(sb, hint);
	341	len = readlink(path, sb->buf, hint);
	342	if (len < 0) {
	343	if (errno != ERANGE)
	344	break;
	345	} else if (len < hint) {
	346	strbuf_setlen(sb, len);
	347	return 0;
	348	}
	349
	350	/* .. the buffer was too small - try again */
	351	hint *= 2;
	352	}
2fc64700 RS	353	if (oldalloc == 0)
2fc64700 RS	354	strbuf_release(sb);
b11b7e13 LT	355	return -1;
	356	}
	357
c7e4f0d7	358	int strbuf_getwholeline(struct strbuf sb, FILE fp, int term)
917c9a71	359	{
d1df5743	360	int ch;
e6c019d0	361
e6c019d0 PH	362	if (feof(fp))
e6c019d0 PH	363	return EOF;
b449f4cf PH	364
b449f4cf PH	365	strbuf_reset(sb);
d1df5743	366	while ((ch = fgetc(fp)) != EOF) {
b449f4cf PH	367	strbuf_grow(sb, 1);
b449f4cf PH	368	sb->buf[sb->len++] = ch;
c7e4f0d7 BC	369	if (ch == term)
c7e4f0d7 BC	370	break;
d1df5743	371	}
e6c019d0 PH	372	if (ch == EOF && sb->len == 0)
e6c019d0 PH	373	return EOF;
b449f4cf	374
b449f4cf	375	sb->buf[sb->len] = '\0';
e6c019d0	376	return 0;
d1df5743	377	}
a9390b9f	378
c7e4f0d7 BC	379	int strbuf_getline(struct strbuf sb, FILE fp, int term)
	380	{
	381	if (strbuf_getwholeline(sb, fp, term))
	382	return EOF;
	383	if (sb->buf[sb->len-1] == term)
	384	strbuf_setlen(sb, sb->len-1);
	385	return 0;
	386	}
	387
5e8617f5 TR	388	int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
	389	{
	390	strbuf_reset(sb);
	391
	392	while (1) {
	393	char ch;
	394	ssize_t len = xread(fd, &ch, 1);
	395	if (len <= 0)
	396	return EOF;
	397	strbuf_addch(sb, ch);
	398	if (ch == term)
	399	break;
	400	}
	401	return 0;
	402	}
	403
387e7e19	404	int strbuf_read_file(struct strbuf sb, const char path, size_t hint)
a9390b9f KH	405	{
	406	int fd, len;
	407
	408	fd = open(path, O_RDONLY);
	409	if (fd < 0)
	410	return -1;
387e7e19	411	len = strbuf_read(sb, fd, hint);
a9390b9f KH	412	close(fd);
	413	if (len < 0)
	414	return -1;
	415
	416	return len;
	417	}
895680f0 JH	418
	419	void strbuf_add_lines(struct strbuf out, const char prefix,
	420	const char *buf, size_t size)
	421	{
	422	while (size) {
	423	const char *next = memchr(buf, '\n', size);
	424	next = next ? (next + 1) : (buf + size);
	425	strbuf_addstr(out, prefix);
	426	strbuf_add(out, buf, next - buf);
	427	size -= next - buf;
	428	buf = next;
	429	}
	430	strbuf_complete_line(out);
	431	}
367d20ec	432
c505116b JK	433	static int is_rfc3986_reserved(char ch)
	434	{
	435	switch (ch) {
	436	case '!': case '*': case '\'': case '(': case ')': case ';':
	437	case ':': case '@': case '&': case '=': case '+': case '$':
	438	case ',': case '/': case '?': case '#': case '[': case ']':
	439	return 1;
	440	}
	441	return 0;
	442	}
	443
	444	static int is_rfc3986_unreserved(char ch)
	445	{
	446	return isalnum(ch) \|\|
	447	ch == '-' \|\| ch == '_' \|\| ch == '.' \|\| ch == '~';
	448	}
	449
ea03a8e1 JH	450	static void strbuf_add_urlencode(struct strbuf sb, const char s, size_t len,
ea03a8e1 JH	451	int reserved)
c505116b JK	452	{
	453	strbuf_grow(sb, len);
	454	while (len--) {
	455	char ch = *s++;
	456	if (is_rfc3986_unreserved(ch) \|\|
	457	(!reserved && is_rfc3986_reserved(ch)))
	458	strbuf_addch(sb, ch);
	459	else
	460	strbuf_addf(sb, "%%%02x", ch);
	461	}
	462	}
	463
	464	void strbuf_addstr_urlencode(struct strbuf sb, const char s,
	465	int reserved)
	466	{
	467	strbuf_add_urlencode(sb, s, strlen(s), reserved);
	468	}
9a0a30aa	469
9a0a30aa NTND	470	int printf_ln(const char *fmt, ...)
	471	{
	472	int ret;
	473	va_list ap;
	474	va_start(ap, fmt);
	475	ret = vprintf(fmt, ap);
	476	va_end(ap);
	477	if (ret < 0 \|\| putchar('\n') == EOF)
	478	return -1;
	479	return ret + 1;
	480	}
	481
	482	int fprintf_ln(FILE fp, const char fmt, ...)
	483	{
	484	int ret;
	485	va_list ap;
	486	va_start(ap, fmt);
	487	ret = vfprintf(fp, fmt, ap);
	488	va_end(ap);
	489	if (ret < 0 \|\| putc('\n', fp) == EOF)
	490	return -1;
	491	return ret + 1;
	492	}