char git_buf__oom[1];
#define ENSURE_SIZE(b, d) \
- if ((d) > buf->asize && git_buf_grow(b, (d)) < 0)\
+ if ((b)->ptr == git_buf__oom || \
+ ((d) > (b)->asize && git_buf_grow((b), (d)) < 0))\
return -1;
-void git_buf_init(git_buf *buf, size_t initial_size)
+int git_buf_init(git_buf *buf, size_t initial_size)
{
buf->asize = 0;
buf->size = 0;
buf->ptr = git_buf__initbuf;
- if (initial_size)
- git_buf_grow(buf, initial_size);
+ ENSURE_SIZE(buf, initial_size);
+
+ return 0;
}
int git_buf_try_grow(
- git_buf *buf, size_t target_size, bool mark_oom, bool preserve_external)
+ git_buf *buf, size_t target_size, bool mark_oom)
{
char *new_ptr;
size_t new_size;
if (buf->ptr == git_buf__oom)
return -1;
+ if (buf->asize == 0 && buf->size != 0) {
+ git_error_set(GIT_ERROR_INVALID, "cannot grow a borrowed buffer");
+ return GIT_EINVALID;
+ }
+
if (!target_size)
target_size = buf->size;
new_ptr = NULL;
} else {
new_size = buf->asize;
+ /*
+ * Grow the allocated buffer by 1.5 to allow
+ * re-use of memory holes resulting from the
+ * realloc. If this is still too small, then just
+ * use the target size.
+ */
+ if ((new_size = (new_size << 1) - (new_size >> 1)) < target_size)
+ new_size = target_size;
new_ptr = buf->ptr;
}
- /* grow the buffer size by 1.5, until it's big enough
- * to fit our target size */
- while (new_size < target_size)
- new_size = (new_size << 1) - (new_size >> 1);
-
/* round allocation up to multiple of 8 */
new_size = (new_size + 7) & ~7;
+ if (new_size < buf->size) {
+ if (mark_oom) {
+ if (buf->ptr && buf->ptr != git_buf__initbuf)
+ git__free(buf->ptr);
+ buf->ptr = git_buf__oom;
+ }
+
+ git_error_set_oom();
+ return -1;
+ }
+
new_ptr = git__realloc(new_ptr, new_size);
if (!new_ptr) {
if (mark_oom) {
- if (buf->ptr) git__free(buf->ptr);
+ if (buf->ptr && (buf->ptr != git_buf__initbuf))
+ git__free(buf->ptr);
buf->ptr = git_buf__oom;
}
return -1;
}
- if (preserve_external && !buf->asize && buf->ptr != NULL && buf->size > 0)
- memcpy(new_ptr, buf->ptr, min(buf->size, new_size));
-
buf->asize = new_size;
buf->ptr = new_ptr;
int git_buf_grow(git_buf *buffer, size_t target_size)
{
- return git_buf_try_grow(buffer, target_size, true, true);
+ return git_buf_try_grow(buffer, target_size, true);
}
-void git_buf_free(git_buf *buf)
+int git_buf_grow_by(git_buf *buffer, size_t additional_size)
+{
+ size_t newsize;
+
+ if (GIT_ADD_SIZET_OVERFLOW(&newsize, buffer->size, additional_size)) {
+ buffer->ptr = git_buf__oom;
+ return -1;
+ }
+
+ return git_buf_try_grow(buffer, newsize, true);
+}
+
+void git_buf_dispose(git_buf *buf)
{
if (!buf) return;
git_buf_init(buf, 0);
}
+#ifndef GIT_DEPRECATE_HARD
+void git_buf_free(git_buf *buf)
+{
+ git_buf_dispose(buf);
+}
+#endif
+
void git_buf_sanitize(git_buf *buf)
{
if (buf->ptr == NULL) {
int git_buf_set(git_buf *buf, const void *data, size_t len)
{
+ size_t alloclen;
+
if (len == 0 || data == NULL) {
git_buf_clear(buf);
} else {
if (data != buf->ptr) {
- ENSURE_SIZE(buf, len + 1);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, len, 1);
+ ENSURE_SIZE(buf, alloclen);
memmove(buf->ptr, data, len);
}
int git_buf_putc(git_buf *buf, char c)
{
- ENSURE_SIZE(buf, buf->size + 2);
+ size_t new_size;
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, buf->size, 2);
+ ENSURE_SIZE(buf, new_size);
buf->ptr[buf->size++] = c;
buf->ptr[buf->size] = '\0';
return 0;
int git_buf_putcn(git_buf *buf, char c, size_t len)
{
- ENSURE_SIZE(buf, buf->size + len + 1);
+ size_t new_size;
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, buf->size, len);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
+ ENSURE_SIZE(buf, new_size);
memset(buf->ptr + buf->size, c, len);
buf->size += len;
buf->ptr[buf->size] = '\0';
int git_buf_put(git_buf *buf, const char *data, size_t len)
{
if (len) {
+ size_t new_size;
+
assert(data);
- ENSURE_SIZE(buf, buf->size + len + 1);
+
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, buf->size, len);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
+ ENSURE_SIZE(buf, new_size);
memmove(buf->ptr + buf->size, data, len);
buf->size += len;
buf->ptr[buf->size] = '\0';
size_t extra = len % 3;
uint8_t *write, a, b, c;
const uint8_t *read = (const uint8_t *)data;
+ size_t blocks = (len / 3) + !!extra, alloclen;
- ENSURE_SIZE(buf, buf->size + 4 * ((len / 3) + !!extra) + 1);
+ GIT_ERROR_CHECK_ALLOC_ADD(&blocks, blocks, 1);
+ GIT_ERROR_CHECK_ALLOC_MULTIPLY(&alloclen, blocks, 4);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, alloclen, buf->size);
+
+ ENSURE_SIZE(buf, alloclen);
write = (uint8_t *)&buf->ptr[buf->size];
/* convert each run of 3 bytes into 4 output bytes */
return 0;
}
-/* The inverse of base64_encode, offset by '+' == 43. */
+/* The inverse of base64_encode */
static const int8_t base64_decode[] = {
- 62,
- -1, -1, -1,
- 63,
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
- -1, -1, -1, 0, -1, -1, -1,
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
- 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
- -1, -1, -1, -1, -1, -1,
- 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
- 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1,
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
+ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
-#define BASE64_DECODE_VALUE(c) (((c) < 43 || (c) > 122) ? -1 : base64_decode[c - 43])
-
int git_buf_decode_base64(git_buf *buf, const char *base64, size_t len)
{
size_t i;
int8_t a, b, c, d;
- size_t orig_size = buf->size;
+ size_t orig_size = buf->size, new_size;
+
+ if (len % 4) {
+ git_error_set(GIT_ERROR_INVALID, "invalid base64 input");
+ return -1;
+ }
assert(len % 4 == 0);
- ENSURE_SIZE(buf, buf->size + (len / 4 * 3) + 1);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, (len / 4 * 3), buf->size);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
+ ENSURE_SIZE(buf, new_size);
for (i = 0; i < len; i += 4) {
- if ((a = BASE64_DECODE_VALUE(base64[i])) < 0 ||
- (b = BASE64_DECODE_VALUE(base64[i+1])) < 0 ||
- (c = BASE64_DECODE_VALUE(base64[i+2])) < 0 ||
- (d = BASE64_DECODE_VALUE(base64[i+3])) < 0) {
+ if ((a = base64_decode[(unsigned char)base64[i]]) < 0 ||
+ (b = base64_decode[(unsigned char)base64[i+1]]) < 0 ||
+ (c = base64_decode[(unsigned char)base64[i+2]]) < 0 ||
+ (d = base64_decode[(unsigned char)base64[i+3]]) < 0) {
buf->size = orig_size;
buf->ptr[buf->size] = '\0';
- giterr_set(GITERR_INVALID, "Invalid base64 input");
+ git_error_set(GIT_ERROR_INVALID, "invalid base64 input");
return -1;
}
return 0;
}
-static const char b85str[] =
+static const char base85_encode[] =
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~";
int git_buf_encode_base85(git_buf *buf, const char *data, size_t len)
{
- ENSURE_SIZE(buf, buf->size + (5 * ((len / 4) + !!(len % 4))) + 1);
+ size_t blocks = (len / 4) + !!(len % 4), alloclen;
+
+ GIT_ERROR_CHECK_ALLOC_MULTIPLY(&alloclen, blocks, 5);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, alloclen, buf->size);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, alloclen, 1);
+
+ ENSURE_SIZE(buf, alloclen);
while (len) {
uint32_t acc = 0;
for (i = 24; i >= 0; i -= 8) {
uint8_t ch = *data++;
- acc |= ch << i;
+ acc |= (uint32_t)ch << i;
if (--len == 0)
break;
int val = acc % 85;
acc /= 85;
- b85[i] = b85str[val];
+ b85[i] = base85_encode[val];
}
for (i = 0; i < 5; i++)
return 0;
}
+/* The inverse of base85_encode */
+static const int8_t base85_decode[] = {
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, 63, -1, 64, 65, 66, 67, -1, 68, 69, 70, 71, -1, 72, -1, -1,
+ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, -1, 73, 74, 75, 76, 77,
+ 78, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
+ 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, -1, -1, -1, 79, 80,
+ 81, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 82, 83, 84, 85, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
+};
+
+int git_buf_decode_base85(
+ git_buf *buf,
+ const char *base85,
+ size_t base85_len,
+ size_t output_len)
+{
+ size_t orig_size = buf->size, new_size;
+
+ if (base85_len % 5 ||
+ output_len > base85_len * 4 / 5) {
+ git_error_set(GIT_ERROR_INVALID, "invalid base85 input");
+ return -1;
+ }
+
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, output_len, buf->size);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
+ ENSURE_SIZE(buf, new_size);
+
+ while (output_len) {
+ unsigned acc = 0;
+ int de, cnt = 4;
+ unsigned char ch;
+ do {
+ ch = *base85++;
+ de = base85_decode[ch];
+ if (--de < 0)
+ goto on_error;
+
+ acc = acc * 85 + de;
+ } while (--cnt);
+ ch = *base85++;
+ de = base85_decode[ch];
+ if (--de < 0)
+ goto on_error;
+
+ /* Detect overflow. */
+ if (0xffffffff / 85 < acc ||
+ 0xffffffff - de < (acc *= 85))
+ goto on_error;
+
+ acc += de;
+
+ cnt = (output_len < 4) ? (int)output_len : 4;
+ output_len -= cnt;
+ do {
+ acc = (acc << 8) | (acc >> 24);
+ buf->ptr[buf->size++] = acc;
+ } while (--cnt);
+ }
+
+ buf->ptr[buf->size] = 0;
+
+ return 0;
+
+on_error:
+ buf->size = orig_size;
+ buf->ptr[buf->size] = '\0';
+
+ git_error_set(GIT_ERROR_INVALID, "invalid base85 input");
+ return -1;
+}
+
+#define HEX_DECODE(c) ((c | 32) % 39 - 9)
+
+int git_buf_decode_percent(
+ git_buf *buf,
+ const char *str,
+ size_t str_len)
+{
+ size_t str_pos, new_size;
+
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, buf->size, str_len);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
+ ENSURE_SIZE(buf, new_size);
+
+ for (str_pos = 0; str_pos < str_len; buf->size++, str_pos++) {
+ if (str[str_pos] == '%' &&
+ str_len > str_pos + 2 &&
+ isxdigit(str[str_pos + 1]) &&
+ isxdigit(str[str_pos + 2])) {
+ buf->ptr[buf->size] = (HEX_DECODE(str[str_pos + 1]) << 4) +
+ HEX_DECODE(str[str_pos + 2]);
+ str_pos += 2;
+ } else {
+ buf->ptr[buf->size] = str[str_pos];
+ }
+ }
+
+ buf->ptr[buf->size] = '\0';
+ return 0;
+}
+
int git_buf_vprintf(git_buf *buf, const char *format, va_list ap)
{
+ size_t expected_size, new_size;
int len;
- const size_t expected_size = buf->size + (strlen(format) * 2);
+ GIT_ERROR_CHECK_ALLOC_MULTIPLY(&expected_size, strlen(format), 2);
+ GIT_ERROR_CHECK_ALLOC_ADD(&expected_size, expected_size, buf->size);
ENSURE_SIZE(buf, expected_size);
while (1) {
break;
}
- ENSURE_SIZE(buf, buf->size + len + 1);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, buf->size, len);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
+ ENSURE_SIZE(buf, new_size);
}
return 0;
data[copylen] = '\0';
}
+void git_buf_consume_bytes(git_buf *buf, size_t len)
+{
+ git_buf_consume(buf, buf->ptr + len);
+}
+
void git_buf_consume(git_buf *buf, const char *end)
{
if (end > buf->ptr && end <= buf->ptr + buf->size) {
return data;
}
-void git_buf_attach(git_buf *buf, char *ptr, size_t asize)
+int git_buf_attach(git_buf *buf, char *ptr, size_t asize)
{
- git_buf_free(buf);
+ git_buf_dispose(buf);
if (ptr) {
buf->ptr = ptr;
buf->asize = (asize < buf->size) ? buf->size + 1 : asize;
else /* pass 0 to fall back on strlen + 1 */
buf->asize = buf->size + 1;
+ }
+
+ ENSURE_SIZE(buf, asize);
+ return 0;
+}
+
+void git_buf_attach_notowned(git_buf *buf, const char *ptr, size_t size)
+{
+ if (git_buf_is_allocated(buf))
+ git_buf_dispose(buf);
+
+ if (!size) {
+ git_buf_init(buf, 0);
} else {
- git_buf_grow(buf, asize);
+ buf->ptr = (char *)ptr;
+ buf->asize = 0;
+ buf->size = size;
}
}
continue;
segment_len = strlen(segment);
- total_size += segment_len;
+
+ GIT_ERROR_CHECK_ALLOC_ADD(&total_size, total_size, segment_len);
+
if (segment_len == 0 || segment[segment_len - 1] != separator)
- ++total_size; /* space for separator */
+ GIT_ERROR_CHECK_ALLOC_ADD(&total_size, total_size, 1);
}
va_end(ap);
/* expand buffer if needed */
if (total_size == 0)
return 0;
- if (git_buf_grow(buf, buf->size + total_size + 1) < 0)
+
+ GIT_ERROR_CHECK_ALLOC_ADD(&total_size, total_size, 1);
+ if (git_buf_grow_by(buf, total_size) < 0)
return -1;
out = buf->ptr + buf->size;
{
size_t strlen_a = str_a ? strlen(str_a) : 0;
size_t strlen_b = strlen(str_b);
+ size_t alloc_len;
int need_sep = 0;
ssize_t offset_a = -1;
/* not safe to have str_b point internally to the buffer */
- assert(str_b < buf->ptr || str_b >= buf->ptr + buf->size);
+ if (buf->size)
+ assert(str_b < buf->ptr || str_b >= buf->ptr + buf->size);
/* figure out if we need to insert a separator */
if (separator && strlen_a) {
}
/* str_a could be part of the buffer */
- if (str_a >= buf->ptr && str_a < buf->ptr + buf->size)
+ if (buf->size && str_a >= buf->ptr && str_a < buf->ptr + buf->size)
offset_a = str_a - buf->ptr;
- if (git_buf_grow(buf, strlen_a + strlen_b + need_sep + 1) < 0)
- return -1;
- assert(buf->ptr);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, strlen_a, strlen_b);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, need_sep);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, 1);
+ ENSURE_SIZE(buf, alloc_len);
/* fix up internal pointers */
if (offset_a >= 0)
const char *str_b,
const char *str_c)
{
- size_t len_a = strlen(str_a), len_b = strlen(str_b), len_c = strlen(str_c);
+ size_t len_a = strlen(str_a),
+ len_b = strlen(str_b),
+ len_c = strlen(str_c),
+ len_total;
int sep_a = 0, sep_b = 0;
char *tgt;
sep_b = (str_b[len_b - 1] != separator);
}
- if (git_buf_grow(buf, len_a + sep_a + len_b + sep_b + len_c + 1) < 0)
- return -1;
+ GIT_ERROR_CHECK_ALLOC_ADD(&len_total, len_a, sep_a);
+ GIT_ERROR_CHECK_ALLOC_ADD(&len_total, len_total, len_b);
+ GIT_ERROR_CHECK_ALLOC_ADD(&len_total, len_total, sep_b);
+ GIT_ERROR_CHECK_ALLOC_ADD(&len_total, len_total, len_c);
+ GIT_ERROR_CHECK_ALLOC_ADD(&len_total, len_total, 1);
+ ENSURE_SIZE(buf, len_total);
tgt = buf->ptr;
const char *data,
size_t nb_to_insert)
{
- assert(buf &&
- where <= git_buf_len(buf) &&
- where + nb_to_remove <= git_buf_len(buf));
+ char *splice_loc;
+ size_t new_size, alloc_size;
+
+ assert(buf && where <= buf->size && nb_to_remove <= buf->size - where);
+
+ splice_loc = buf->ptr + where;
/* Ported from git.git
* https://github.com/git/git/blob/16eed7c/strbuf.c#L159-176
*/
- ENSURE_SIZE(buf, buf->size + nb_to_insert - nb_to_insert + 1);
+ GIT_ERROR_CHECK_ALLOC_ADD(&new_size, (buf->size - nb_to_remove), nb_to_insert);
+ GIT_ERROR_CHECK_ALLOC_ADD(&alloc_size, new_size, 1);
+ ENSURE_SIZE(buf, alloc_size);
- memmove(buf->ptr + where + nb_to_insert,
- buf->ptr + where + nb_to_remove,
- buf->size - where - nb_to_remove);
+ memmove(splice_loc + nb_to_insert,
+ splice_loc + nb_to_remove,
+ buf->size - where - nb_to_remove);
- memcpy(buf->ptr + where, data, nb_to_insert);
+ memcpy(splice_loc, data, nb_to_insert);
- buf->size = buf->size + nb_to_insert - nb_to_remove;
+ buf->size = new_size;
buf->ptr[buf->size] = '\0';
return 0;
}
+
+/* Quote per http://marc.info/?l=git&m=112927316408690&w=2 */
+int git_buf_quote(git_buf *buf)
+{
+ const char whitespace[] = { 'a', 'b', 't', 'n', 'v', 'f', 'r' };
+ git_buf quoted = GIT_BUF_INIT;
+ size_t i = 0;
+ bool quote = false;
+ int error = 0;
+
+ /* walk to the first char that needs quoting */
+ if (buf->size && buf->ptr[0] == '!')
+ quote = true;
+
+ for (i = 0; !quote && i < buf->size; i++) {
+ if (buf->ptr[i] == '"' || buf->ptr[i] == '\\' ||
+ buf->ptr[i] < ' ' || buf->ptr[i] > '~') {
+ quote = true;
+ break;
+ }
+ }
+
+ if (!quote)
+ goto done;
+
+ git_buf_putc("ed, '"');
+ git_buf_put("ed, buf->ptr, i);
+
+ for (; i < buf->size; i++) {
+ /* whitespace - use the map above, which is ordered by ascii value */
+ if (buf->ptr[i] >= '\a' && buf->ptr[i] <= '\r') {
+ git_buf_putc("ed, '\\');
+ git_buf_putc("ed, whitespace[buf->ptr[i] - '\a']);
+ }
+
+ /* double quote and backslash must be escaped */
+ else if (buf->ptr[i] == '"' || buf->ptr[i] == '\\') {
+ git_buf_putc("ed, '\\');
+ git_buf_putc("ed, buf->ptr[i]);
+ }
+
+ /* escape anything unprintable as octal */
+ else if (buf->ptr[i] != ' ' &&
+ (buf->ptr[i] < '!' || buf->ptr[i] > '~')) {
+ git_buf_printf("ed, "\\%03o", (unsigned char)buf->ptr[i]);
+ }
+
+ /* yay, printable! */
+ else {
+ git_buf_putc("ed, buf->ptr[i]);
+ }
+ }
+
+ git_buf_putc("ed, '"');
+
+ if (git_buf_oom("ed)) {
+ error = -1;
+ goto done;
+ }
+
+ git_buf_swap("ed, buf);
+
+done:
+ git_buf_dispose("ed);
+ return error;
+}
+
+/* Unquote per http://marc.info/?l=git&m=112927316408690&w=2 */
+int git_buf_unquote(git_buf *buf)
+{
+ size_t i, j;
+ char ch;
+
+ git_buf_rtrim(buf);
+
+ if (buf->size < 2 || buf->ptr[0] != '"' || buf->ptr[buf->size-1] != '"')
+ goto invalid;
+
+ for (i = 0, j = 1; j < buf->size-1; i++, j++) {
+ ch = buf->ptr[j];
+
+ if (ch == '\\') {
+ if (j == buf->size-2)
+ goto invalid;
+
+ ch = buf->ptr[++j];
+
+ switch (ch) {
+ /* \" or \\ simply copy the char in */
+ case '"': case '\\':
+ break;
+
+ /* add the appropriate escaped char */
+ case 'a': ch = '\a'; break;
+ case 'b': ch = '\b'; break;
+ case 'f': ch = '\f'; break;
+ case 'n': ch = '\n'; break;
+ case 'r': ch = '\r'; break;
+ case 't': ch = '\t'; break;
+ case 'v': ch = '\v'; break;
+
+ /* \xyz digits convert to the char*/
+ case '0': case '1': case '2': case '3':
+ if (j == buf->size-3) {
+ git_error_set(GIT_ERROR_INVALID,
+ "truncated quoted character \\%c", ch);
+ return -1;
+ }
+
+ if (buf->ptr[j+1] < '0' || buf->ptr[j+1] > '7' ||
+ buf->ptr[j+2] < '0' || buf->ptr[j+2] > '7') {
+ git_error_set(GIT_ERROR_INVALID,
+ "truncated quoted character \\%c%c%c",
+ buf->ptr[j], buf->ptr[j+1], buf->ptr[j+2]);
+ return -1;
+ }
+
+ ch = ((buf->ptr[j] - '0') << 6) |
+ ((buf->ptr[j+1] - '0') << 3) |
+ (buf->ptr[j+2] - '0');
+ j += 2;
+ break;
+
+ default:
+ git_error_set(GIT_ERROR_INVALID, "invalid quoted character \\%c", ch);
+ return -1;
+ }
+ }
+
+ buf->ptr[i] = ch;
+ }
+
+ buf->ptr[i] = '\0';
+ buf->size = i;
+
+ return 0;
+
+invalid:
+ git_error_set(GIT_ERROR_INVALID, "invalid quoted line");
+ return -1;
+}
projects / libgit2.git / blobdiff