You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
824 lines
20 KiB
824 lines
20 KiB
#include "git-compat-util.h" |
|
#include "strbuf.h" |
|
#include "utf8.h" |
|
|
|
/* This code is originally from http://www.cl.cam.ac.uk/~mgk25/ucs/ */ |
|
|
|
static const char utf16_be_bom[] = {'\xFE', '\xFF'}; |
|
static const char utf16_le_bom[] = {'\xFF', '\xFE'}; |
|
static const char utf32_be_bom[] = {'\0', '\0', '\xFE', '\xFF'}; |
|
static const char utf32_le_bom[] = {'\xFF', '\xFE', '\0', '\0'}; |
|
|
|
struct interval { |
|
ucs_char_t first; |
|
ucs_char_t last; |
|
}; |
|
|
|
size_t display_mode_esc_sequence_len(const char *s) |
|
{ |
|
const char *p = s; |
|
if (*p++ != '\033') |
|
return 0; |
|
if (*p++ != '[') |
|
return 0; |
|
while (isdigit(*p) || *p == ';') |
|
p++; |
|
if (*p++ != 'm') |
|
return 0; |
|
return p - s; |
|
} |
|
|
|
/* auxiliary function for binary search in interval table */ |
|
static int bisearch(ucs_char_t ucs, const struct interval *table, int max) |
|
{ |
|
int min = 0; |
|
int mid; |
|
|
|
if (ucs < table[0].first || ucs > table[max].last) |
|
return 0; |
|
while (max >= min) { |
|
mid = min + (max - min) / 2; |
|
if (ucs > table[mid].last) |
|
min = mid + 1; |
|
else if (ucs < table[mid].first) |
|
max = mid - 1; |
|
else |
|
return 1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* The following two functions define the column width of an ISO 10646 |
|
* character as follows: |
|
* |
|
* - The null character (U+0000) has a column width of 0. |
|
* |
|
* - Other C0/C1 control characters and DEL will lead to a return |
|
* value of -1. |
|
* |
|
* - Non-spacing and enclosing combining characters (general |
|
* category code Mn or Me in the Unicode database) have a |
|
* column width of 0. |
|
* |
|
* - SOFT HYPHEN (U+00AD) has a column width of 1. |
|
* |
|
* - Other format characters (general category code Cf in the Unicode |
|
* database) and ZERO WIDTH SPACE (U+200B) have a column width of 0. |
|
* |
|
* - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) |
|
* have a column width of 0. |
|
* |
|
* - Spacing characters in the East Asian Wide (W) or East Asian |
|
* Full-width (F) category as defined in Unicode Technical |
|
* Report #11 have a column width of 2. |
|
* |
|
* - All remaining characters (including all printable |
|
* ISO 8859-1 and WGL4 characters, Unicode control characters, |
|
* etc.) have a column width of 1. |
|
* |
|
* This implementation assumes that ucs_char_t characters are encoded |
|
* in ISO 10646. |
|
*/ |
|
|
|
static int git_wcwidth(ucs_char_t ch) |
|
{ |
|
/* |
|
* Sorted list of non-overlapping intervals of non-spacing characters, |
|
*/ |
|
#include "unicode-width.h" |
|
|
|
/* test for 8-bit control characters */ |
|
if (ch == 0) |
|
return 0; |
|
if (ch < 32 || (ch >= 0x7f && ch < 0xa0)) |
|
return -1; |
|
|
|
/* binary search in table of non-spacing characters */ |
|
if (bisearch(ch, zero_width, ARRAY_SIZE(zero_width) - 1)) |
|
return 0; |
|
|
|
/* binary search in table of double width characters */ |
|
if (bisearch(ch, double_width, ARRAY_SIZE(double_width) - 1)) |
|
return 2; |
|
|
|
return 1; |
|
} |
|
|
|
/* |
|
* Pick one ucs character starting from the location *start points at, |
|
* and return it, while updating the *start pointer to point at the |
|
* end of that character. When remainder_p is not NULL, the location |
|
* holds the number of bytes remaining in the string that we are allowed |
|
* to pick from. Otherwise we are allowed to pick up to the NUL that |
|
* would eventually appear in the string. *remainder_p is also reduced |
|
* by the number of bytes we have consumed. |
|
* |
|
* If the string was not a valid UTF-8, *start pointer is set to NULL |
|
* and the return value is undefined. |
|
*/ |
|
static ucs_char_t pick_one_utf8_char(const char **start, size_t *remainder_p) |
|
{ |
|
unsigned char *s = (unsigned char *)*start; |
|
ucs_char_t ch; |
|
size_t remainder, incr; |
|
|
|
/* |
|
* A caller that assumes NUL terminated text can choose |
|
* not to bother with the remainder length. We will |
|
* stop at the first NUL. |
|
*/ |
|
remainder = (remainder_p ? *remainder_p : 999); |
|
|
|
if (remainder < 1) { |
|
goto invalid; |
|
} else if (*s < 0x80) { |
|
/* 0xxxxxxx */ |
|
ch = *s; |
|
incr = 1; |
|
} else if ((s[0] & 0xe0) == 0xc0) { |
|
/* 110XXXXx 10xxxxxx */ |
|
if (remainder < 2 || |
|
(s[1] & 0xc0) != 0x80 || |
|
(s[0] & 0xfe) == 0xc0) |
|
goto invalid; |
|
ch = ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); |
|
incr = 2; |
|
} else if ((s[0] & 0xf0) == 0xe0) { |
|
/* 1110XXXX 10Xxxxxx 10xxxxxx */ |
|
if (remainder < 3 || |
|
(s[1] & 0xc0) != 0x80 || |
|
(s[2] & 0xc0) != 0x80 || |
|
/* overlong? */ |
|
(s[0] == 0xe0 && (s[1] & 0xe0) == 0x80) || |
|
/* surrogate? */ |
|
(s[0] == 0xed && (s[1] & 0xe0) == 0xa0) || |
|
/* U+FFFE or U+FFFF? */ |
|
(s[0] == 0xef && s[1] == 0xbf && |
|
(s[2] & 0xfe) == 0xbe)) |
|
goto invalid; |
|
ch = ((s[0] & 0x0f) << 12) | |
|
((s[1] & 0x3f) << 6) | (s[2] & 0x3f); |
|
incr = 3; |
|
} else if ((s[0] & 0xf8) == 0xf0) { |
|
/* 11110XXX 10XXxxxx 10xxxxxx 10xxxxxx */ |
|
if (remainder < 4 || |
|
(s[1] & 0xc0) != 0x80 || |
|
(s[2] & 0xc0) != 0x80 || |
|
(s[3] & 0xc0) != 0x80 || |
|
/* overlong? */ |
|
(s[0] == 0xf0 && (s[1] & 0xf0) == 0x80) || |
|
/* > U+10FFFF? */ |
|
(s[0] == 0xf4 && s[1] > 0x8f) || s[0] > 0xf4) |
|
goto invalid; |
|
ch = ((s[0] & 0x07) << 18) | ((s[1] & 0x3f) << 12) | |
|
((s[2] & 0x3f) << 6) | (s[3] & 0x3f); |
|
incr = 4; |
|
} else { |
|
invalid: |
|
*start = NULL; |
|
return 0; |
|
} |
|
|
|
*start += incr; |
|
if (remainder_p) |
|
*remainder_p = remainder - incr; |
|
return ch; |
|
} |
|
|
|
/* |
|
* This function returns the number of columns occupied by the character |
|
* pointed to by the variable start. The pointer is updated to point at |
|
* the next character. When remainder_p is not NULL, it points at the |
|
* location that stores the number of remaining bytes we can use to pick |
|
* a character (see pick_one_utf8_char() above). |
|
*/ |
|
int utf8_width(const char **start, size_t *remainder_p) |
|
{ |
|
ucs_char_t ch = pick_one_utf8_char(start, remainder_p); |
|
if (!*start) |
|
return 0; |
|
return git_wcwidth(ch); |
|
} |
|
|
|
/* |
|
* Returns the total number of columns required by a null-terminated |
|
* string, assuming that the string is utf8. Returns strlen() instead |
|
* if the string does not look like a valid utf8 string. |
|
*/ |
|
int utf8_strnwidth(const char *string, size_t len, int skip_ansi) |
|
{ |
|
const char *orig = string; |
|
size_t width = 0; |
|
|
|
while (string && string < orig + len) { |
|
int glyph_width; |
|
size_t skip; |
|
|
|
while (skip_ansi && |
|
(skip = display_mode_esc_sequence_len(string)) != 0) |
|
string += skip; |
|
|
|
glyph_width = utf8_width(&string, NULL); |
|
if (glyph_width > 0) |
|
width += glyph_width; |
|
} |
|
|
|
/* |
|
* TODO: fix the interface of this function and `utf8_strwidth()` to |
|
* return `size_t` instead of `int`. |
|
*/ |
|
return cast_size_t_to_int(string ? width : len); |
|
} |
|
|
|
int utf8_strwidth(const char *string) |
|
{ |
|
return utf8_strnwidth(string, strlen(string), 0); |
|
} |
|
|
|
int is_utf8(const char *text) |
|
{ |
|
while (*text) { |
|
if (*text == '\n' || *text == '\t' || *text == '\r') { |
|
text++; |
|
continue; |
|
} |
|
utf8_width(&text, NULL); |
|
if (!text) |
|
return 0; |
|
} |
|
return 1; |
|
} |
|
|
|
static void strbuf_add_indented_text(struct strbuf *buf, const char *text, |
|
int indent, int indent2) |
|
{ |
|
if (indent < 0) |
|
indent = 0; |
|
while (*text) { |
|
const char *eol = strchrnul(text, '\n'); |
|
if (*eol == '\n') |
|
eol++; |
|
strbuf_addchars(buf, ' ', indent); |
|
strbuf_add(buf, text, eol - text); |
|
text = eol; |
|
indent = indent2; |
|
} |
|
} |
|
|
|
/* |
|
* Wrap the text, if necessary. The variable indent is the indent for the |
|
* first line, indent2 is the indent for all other lines. |
|
* If indent is negative, assume that already -indent columns have been |
|
* consumed (and no extra indent is necessary for the first line). |
|
*/ |
|
void strbuf_add_wrapped_text(struct strbuf *buf, |
|
const char *text, int indent1, int indent2, int width) |
|
{ |
|
int indent, w, assume_utf8 = 1; |
|
const char *bol, *space, *start = text; |
|
size_t orig_len = buf->len; |
|
|
|
if (width <= 0) { |
|
strbuf_add_indented_text(buf, text, indent1, indent2); |
|
return; |
|
} |
|
|
|
retry: |
|
bol = text; |
|
w = indent = indent1; |
|
space = NULL; |
|
if (indent < 0) { |
|
w = -indent; |
|
space = text; |
|
} |
|
|
|
for (;;) { |
|
char c; |
|
size_t skip; |
|
|
|
while ((skip = display_mode_esc_sequence_len(text))) |
|
text += skip; |
|
|
|
c = *text; |
|
if (!c || isspace(c)) { |
|
if (w <= width || !space) { |
|
const char *start = bol; |
|
if (!c && text == start) |
|
return; |
|
if (space) |
|
start = space; |
|
else |
|
strbuf_addchars(buf, ' ', indent); |
|
strbuf_add(buf, start, text - start); |
|
if (!c) |
|
return; |
|
space = text; |
|
if (c == '\t') |
|
w |= 0x07; |
|
else if (c == '\n') { |
|
space++; |
|
if (*space == '\n') { |
|
strbuf_addch(buf, '\n'); |
|
goto new_line; |
|
} |
|
else if (!isalnum(*space)) |
|
goto new_line; |
|
else |
|
strbuf_addch(buf, ' '); |
|
} |
|
w++; |
|
text++; |
|
} |
|
else { |
|
new_line: |
|
strbuf_addch(buf, '\n'); |
|
text = bol = space + isspace(*space); |
|
space = NULL; |
|
w = indent = indent2; |
|
} |
|
continue; |
|
} |
|
if (assume_utf8) { |
|
w += utf8_width(&text, NULL); |
|
if (!text) { |
|
assume_utf8 = 0; |
|
text = start; |
|
strbuf_setlen(buf, orig_len); |
|
goto retry; |
|
} |
|
} else { |
|
w++; |
|
text++; |
|
} |
|
} |
|
} |
|
|
|
void strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len, |
|
int indent, int indent2, int width) |
|
{ |
|
char *tmp = xstrndup(data, len); |
|
strbuf_add_wrapped_text(buf, tmp, indent, indent2, width); |
|
free(tmp); |
|
} |
|
|
|
void strbuf_utf8_replace(struct strbuf *sb_src, int pos, int width, |
|
const char *subst) |
|
{ |
|
const char *src = sb_src->buf, *end = sb_src->buf + sb_src->len; |
|
struct strbuf dst; |
|
int w = 0; |
|
|
|
strbuf_init(&dst, sb_src->len); |
|
|
|
while (src < end) { |
|
const char *old; |
|
int glyph_width; |
|
size_t n; |
|
|
|
while ((n = display_mode_esc_sequence_len(src))) { |
|
strbuf_add(&dst, src, n); |
|
src += n; |
|
} |
|
|
|
if (src >= end) |
|
break; |
|
|
|
old = src; |
|
glyph_width = utf8_width((const char**)&src, NULL); |
|
if (!src) /* broken utf-8, do nothing */ |
|
goto out; |
|
|
|
/* |
|
* In case we see a control character we copy it into the |
|
* buffer, but don't add it to the width. |
|
*/ |
|
if (glyph_width < 0) |
|
glyph_width = 0; |
|
|
|
if (glyph_width && w >= pos && w < pos + width) { |
|
if (subst) { |
|
strbuf_addstr(&dst, subst); |
|
subst = NULL; |
|
} |
|
} else { |
|
strbuf_add(&dst, old, src - old); |
|
} |
|
|
|
w += glyph_width; |
|
} |
|
|
|
strbuf_swap(sb_src, &dst); |
|
out: |
|
strbuf_release(&dst); |
|
} |
|
|
|
/* |
|
* Returns true (1) if the src encoding name matches the dst encoding |
|
* name directly or one of its alternative names. E.g. UTF-16BE is the |
|
* same as UTF16BE. |
|
*/ |
|
static int same_utf_encoding(const char *src, const char *dst) |
|
{ |
|
if (skip_iprefix(src, "utf", &src) && skip_iprefix(dst, "utf", &dst)) { |
|
skip_prefix(src, "-", &src); |
|
skip_prefix(dst, "-", &dst); |
|
return !strcasecmp(src, dst); |
|
} |
|
return 0; |
|
} |
|
|
|
int is_encoding_utf8(const char *name) |
|
{ |
|
if (!name) |
|
return 1; |
|
if (same_utf_encoding("utf-8", name)) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
int same_encoding(const char *src, const char *dst) |
|
{ |
|
static const char utf8[] = "UTF-8"; |
|
|
|
if (!src) |
|
src = utf8; |
|
if (!dst) |
|
dst = utf8; |
|
if (same_utf_encoding(src, dst)) |
|
return 1; |
|
return !strcasecmp(src, dst); |
|
} |
|
|
|
/* |
|
* Wrapper for fprintf and returns the total number of columns required |
|
* for the printed string, assuming that the string is utf8. |
|
*/ |
|
int utf8_fprintf(FILE *stream, const char *format, ...) |
|
{ |
|
struct strbuf buf = STRBUF_INIT; |
|
va_list arg; |
|
int columns; |
|
|
|
va_start(arg, format); |
|
strbuf_vaddf(&buf, format, arg); |
|
va_end(arg); |
|
|
|
columns = fputs(buf.buf, stream); |
|
if (0 <= columns) /* keep the error from the I/O */ |
|
columns = utf8_strwidth(buf.buf); |
|
strbuf_release(&buf); |
|
return columns; |
|
} |
|
|
|
/* |
|
* Given a buffer and its encoding, return it re-encoded |
|
* with iconv. If the conversion fails, returns NULL. |
|
*/ |
|
#ifndef NO_ICONV |
|
#if defined(OLD_ICONV) || (defined(__sun__) && !defined(_XPG6)) |
|
typedef const char * iconv_ibp; |
|
#else |
|
typedef char * iconv_ibp; |
|
#endif |
|
char *reencode_string_iconv(const char *in, size_t insz, iconv_t conv, |
|
size_t bom_len, size_t *outsz_p) |
|
{ |
|
size_t outsz, outalloc; |
|
char *out, *outpos; |
|
iconv_ibp cp; |
|
|
|
outsz = insz; |
|
outalloc = st_add(outsz, 1 + bom_len); /* for terminating NUL */ |
|
out = xmalloc(outalloc); |
|
outpos = out + bom_len; |
|
cp = (iconv_ibp)in; |
|
|
|
while (1) { |
|
size_t cnt = iconv(conv, &cp, &insz, &outpos, &outsz); |
|
|
|
if (cnt == (size_t) -1) { |
|
size_t sofar; |
|
if (errno != E2BIG) { |
|
free(out); |
|
return NULL; |
|
} |
|
/* insz has remaining number of bytes. |
|
* since we started outsz the same as insz, |
|
* it is likely that insz is not enough for |
|
* converting the rest. |
|
*/ |
|
sofar = outpos - out; |
|
outalloc = st_add3(sofar, st_mult(insz, 2), 32); |
|
out = xrealloc(out, outalloc); |
|
outpos = out + sofar; |
|
outsz = outalloc - sofar - 1; |
|
} |
|
else { |
|
*outpos = '\0'; |
|
if (outsz_p) |
|
*outsz_p = outpos - out; |
|
break; |
|
} |
|
} |
|
return out; |
|
} |
|
|
|
static const char *fallback_encoding(const char *name) |
|
{ |
|
/* |
|
* Some platforms do not have the variously spelled variants of |
|
* UTF-8, so let's fall back to trying the most official |
|
* spelling. We do so only as a fallback in case the platform |
|
* does understand the user's spelling, but not our official |
|
* one. |
|
*/ |
|
if (is_encoding_utf8(name)) |
|
return "UTF-8"; |
|
|
|
/* |
|
* Even though latin-1 is still seen in e-mail |
|
* headers, some platforms only install ISO-8859-1. |
|
*/ |
|
if (!strcasecmp(name, "latin-1")) |
|
return "ISO-8859-1"; |
|
|
|
return name; |
|
} |
|
|
|
char *reencode_string_len(const char *in, size_t insz, |
|
const char *out_encoding, const char *in_encoding, |
|
size_t *outsz) |
|
{ |
|
iconv_t conv; |
|
char *out; |
|
const char *bom_str = NULL; |
|
size_t bom_len = 0; |
|
|
|
if (!in_encoding) |
|
return NULL; |
|
|
|
/* UTF-16LE-BOM is the same as UTF-16 for reading */ |
|
if (same_utf_encoding("UTF-16LE-BOM", in_encoding)) |
|
in_encoding = "UTF-16"; |
|
|
|
/* |
|
* For writing, UTF-16 iconv typically creates "UTF-16BE-BOM" |
|
* Some users under Windows want the little endian version |
|
* |
|
* We handle UTF-16 and UTF-32 ourselves only if the platform does not |
|
* provide a BOM (which we require), since we want to match the behavior |
|
* of the system tools and libc as much as possible. |
|
*/ |
|
if (same_utf_encoding("UTF-16LE-BOM", out_encoding)) { |
|
bom_str = utf16_le_bom; |
|
bom_len = sizeof(utf16_le_bom); |
|
out_encoding = "UTF-16LE"; |
|
} else if (same_utf_encoding("UTF-16BE-BOM", out_encoding)) { |
|
bom_str = utf16_be_bom; |
|
bom_len = sizeof(utf16_be_bom); |
|
out_encoding = "UTF-16BE"; |
|
#ifdef ICONV_OMITS_BOM |
|
} else if (same_utf_encoding("UTF-16", out_encoding)) { |
|
bom_str = utf16_be_bom; |
|
bom_len = sizeof(utf16_be_bom); |
|
out_encoding = "UTF-16BE"; |
|
} else if (same_utf_encoding("UTF-32", out_encoding)) { |
|
bom_str = utf32_be_bom; |
|
bom_len = sizeof(utf32_be_bom); |
|
out_encoding = "UTF-32BE"; |
|
#endif |
|
} |
|
|
|
conv = iconv_open(out_encoding, in_encoding); |
|
if (conv == (iconv_t) -1) { |
|
in_encoding = fallback_encoding(in_encoding); |
|
out_encoding = fallback_encoding(out_encoding); |
|
|
|
conv = iconv_open(out_encoding, in_encoding); |
|
if (conv == (iconv_t) -1) |
|
return NULL; |
|
} |
|
out = reencode_string_iconv(in, insz, conv, bom_len, outsz); |
|
iconv_close(conv); |
|
if (out && bom_str && bom_len) |
|
memcpy(out, bom_str, bom_len); |
|
return out; |
|
} |
|
#endif |
|
|
|
static int has_bom_prefix(const char *data, size_t len, |
|
const char *bom, size_t bom_len) |
|
{ |
|
return data && bom && (len >= bom_len) && !memcmp(data, bom, bom_len); |
|
} |
|
|
|
int has_prohibited_utf_bom(const char *enc, const char *data, size_t len) |
|
{ |
|
return ( |
|
(same_utf_encoding("UTF-16BE", enc) || |
|
same_utf_encoding("UTF-16LE", enc)) && |
|
(has_bom_prefix(data, len, utf16_be_bom, sizeof(utf16_be_bom)) || |
|
has_bom_prefix(data, len, utf16_le_bom, sizeof(utf16_le_bom))) |
|
) || ( |
|
(same_utf_encoding("UTF-32BE", enc) || |
|
same_utf_encoding("UTF-32LE", enc)) && |
|
(has_bom_prefix(data, len, utf32_be_bom, sizeof(utf32_be_bom)) || |
|
has_bom_prefix(data, len, utf32_le_bom, sizeof(utf32_le_bom))) |
|
); |
|
} |
|
|
|
int is_missing_required_utf_bom(const char *enc, const char *data, size_t len) |
|
{ |
|
return ( |
|
(same_utf_encoding(enc, "UTF-16")) && |
|
!(has_bom_prefix(data, len, utf16_be_bom, sizeof(utf16_be_bom)) || |
|
has_bom_prefix(data, len, utf16_le_bom, sizeof(utf16_le_bom))) |
|
) || ( |
|
(same_utf_encoding(enc, "UTF-32")) && |
|
!(has_bom_prefix(data, len, utf32_be_bom, sizeof(utf32_be_bom)) || |
|
has_bom_prefix(data, len, utf32_le_bom, sizeof(utf32_le_bom))) |
|
); |
|
} |
|
|
|
/* |
|
* Returns first character length in bytes for multi-byte `text` according to |
|
* `encoding`. |
|
* |
|
* - The `text` pointer is updated to point at the next character. |
|
* - When `remainder_p` is not NULL, on entry `*remainder_p` is how much bytes |
|
* we can consume from text, and on exit `*remainder_p` is reduced by returned |
|
* character length. Otherwise `text` is treated as limited by NUL. |
|
*/ |
|
int mbs_chrlen(const char **text, size_t *remainder_p, const char *encoding) |
|
{ |
|
int chrlen; |
|
const char *p = *text; |
|
size_t r = (remainder_p ? *remainder_p : SIZE_MAX); |
|
|
|
if (r < 1) |
|
return 0; |
|
|
|
if (is_encoding_utf8(encoding)) { |
|
pick_one_utf8_char(&p, &r); |
|
|
|
chrlen = p ? (p - *text) |
|
: 1 /* not valid UTF-8 -> raw byte sequence */; |
|
} |
|
else { |
|
/* |
|
* TODO use iconv to decode one char and obtain its chrlen |
|
* for now, let's treat encodings != UTF-8 as one-byte |
|
*/ |
|
chrlen = 1; |
|
} |
|
|
|
*text += chrlen; |
|
if (remainder_p) |
|
*remainder_p -= chrlen; |
|
|
|
return chrlen; |
|
} |
|
|
|
/* |
|
* Pick the next char from the stream, ignoring codepoints an HFS+ would. |
|
* Note that this is _not_ complete by any means. It's just enough |
|
* to make is_hfs_dotgit() work, and should not be used otherwise. |
|
*/ |
|
static ucs_char_t next_hfs_char(const char **in) |
|
{ |
|
while (1) { |
|
ucs_char_t out = pick_one_utf8_char(in, NULL); |
|
/* |
|
* check for malformed utf8. Technically this |
|
* gets converted to a percent-sequence, but |
|
* returning 0 is good enough for is_hfs_dotgit |
|
* to realize it cannot be .git |
|
*/ |
|
if (!*in) |
|
return 0; |
|
|
|
/* these code points are ignored completely */ |
|
switch (out) { |
|
case 0x200c: /* ZERO WIDTH NON-JOINER */ |
|
case 0x200d: /* ZERO WIDTH JOINER */ |
|
case 0x200e: /* LEFT-TO-RIGHT MARK */ |
|
case 0x200f: /* RIGHT-TO-LEFT MARK */ |
|
case 0x202a: /* LEFT-TO-RIGHT EMBEDDING */ |
|
case 0x202b: /* RIGHT-TO-LEFT EMBEDDING */ |
|
case 0x202c: /* POP DIRECTIONAL FORMATTING */ |
|
case 0x202d: /* LEFT-TO-RIGHT OVERRIDE */ |
|
case 0x202e: /* RIGHT-TO-LEFT OVERRIDE */ |
|
case 0x206a: /* INHIBIT SYMMETRIC SWAPPING */ |
|
case 0x206b: /* ACTIVATE SYMMETRIC SWAPPING */ |
|
case 0x206c: /* INHIBIT ARABIC FORM SHAPING */ |
|
case 0x206d: /* ACTIVATE ARABIC FORM SHAPING */ |
|
case 0x206e: /* NATIONAL DIGIT SHAPES */ |
|
case 0x206f: /* NOMINAL DIGIT SHAPES */ |
|
case 0xfeff: /* ZERO WIDTH NO-BREAK SPACE */ |
|
continue; |
|
} |
|
|
|
return out; |
|
} |
|
} |
|
|
|
static int is_hfs_dot_generic(const char *path, |
|
const char *needle, size_t needle_len) |
|
{ |
|
ucs_char_t c; |
|
|
|
c = next_hfs_char(&path); |
|
if (c != '.') |
|
return 0; |
|
|
|
/* |
|
* there's a great deal of other case-folding that occurs |
|
* in HFS+, but this is enough to catch our fairly vanilla |
|
* hard-coded needles. |
|
*/ |
|
for (; needle_len > 0; needle++, needle_len--) { |
|
c = next_hfs_char(&path); |
|
|
|
/* |
|
* We know our needles contain only ASCII, so we clamp here to |
|
* make the results of tolower() sane. |
|
*/ |
|
if (c > 127) |
|
return 0; |
|
if (tolower(c) != *needle) |
|
return 0; |
|
} |
|
|
|
c = next_hfs_char(&path); |
|
if (c && !is_dir_sep(c)) |
|
return 0; |
|
|
|
return 1; |
|
} |
|
|
|
/* |
|
* Inline wrapper to make sure the compiler resolves strlen() on literals at |
|
* compile time. |
|
*/ |
|
static inline int is_hfs_dot_str(const char *path, const char *needle) |
|
{ |
|
return is_hfs_dot_generic(path, needle, strlen(needle)); |
|
} |
|
|
|
int is_hfs_dotgit(const char *path) |
|
{ |
|
return is_hfs_dot_str(path, "git"); |
|
} |
|
|
|
int is_hfs_dotgitmodules(const char *path) |
|
{ |
|
return is_hfs_dot_str(path, "gitmodules"); |
|
} |
|
|
|
int is_hfs_dotgitignore(const char *path) |
|
{ |
|
return is_hfs_dot_str(path, "gitignore"); |
|
} |
|
|
|
int is_hfs_dotgitattributes(const char *path) |
|
{ |
|
return is_hfs_dot_str(path, "gitattributes"); |
|
} |
|
|
|
int is_hfs_dotmailmap(const char *path) |
|
{ |
|
return is_hfs_dot_str(path, "mailmap"); |
|
} |
|
|
|
const char utf8_bom[] = "\357\273\277"; |
|
|
|
int skip_utf8_bom(char **text, size_t len) |
|
{ |
|
if (len < strlen(utf8_bom) || |
|
memcmp(*text, utf8_bom, strlen(utf8_bom))) |
|
return 0; |
|
*text += strlen(utf8_bom); |
|
return 1; |
|
} |
|
|
|
void strbuf_utf8_align(struct strbuf *buf, align_type position, unsigned int width, |
|
const char *s) |
|
{ |
|
size_t slen = strlen(s); |
|
int display_len = utf8_strnwidth(s, slen, 0); |
|
int utf8_compensation = slen - display_len; |
|
|
|
if (display_len >= width) { |
|
strbuf_addstr(buf, s); |
|
return; |
|
} |
|
|
|
if (position == ALIGN_LEFT) |
|
strbuf_addf(buf, "%-*s", width + utf8_compensation, s); |
|
else if (position == ALIGN_MIDDLE) { |
|
int left = (width - display_len) / 2; |
|
strbuf_addf(buf, "%*s%-*s", left, "", width - left + utf8_compensation, s); |
|
} else if (position == ALIGN_RIGHT) |
|
strbuf_addf(buf, "%*s", width + utf8_compensation, s); |
|
}
|
|
|