void write_name_quotedpfx(const char *pfx, size_t pfxlen,
const char *name, FILE *fp, int terminator)
{
int needquote = 0;
if (terminator) {
needquote = next_quote_pos(pfx, pfxlen) < pfxlen
|| name[next_quote_pos(name, -1)];
}
if (needquote) {
fputc('"', fp);
quote_c_style_counted(pfx, pfxlen, NULL, fp, 1);
quote_c_style(name, NULL, fp, 1);
fputc('"', fp);
} else {
fwrite(pfx, pfxlen, 1, fp);
fputs(name, fp);
}
fputc(terminator, fp);
}
/*
* C-style name quoting.
*
* (1) if sb and fp are both NULL, inspect the input name and counts the
* number of bytes that are needed to hold c_style quoted version of name,
* counting the double quotes around it but not terminating NUL, and
* returns it.
* However, if name does not need c_style quoting, it returns 0.
*
* (2) if sb or fp are not NULL, it emits the c_style quoted version
* of name, enclosed with double quotes if asked and needed only.
* Return value is the same as in (1).
*/
static size_t quote_c_style_counted(const char *name, ssize_t maxlen,
struct strbuf *sb, FILE *fp, int no_dq)
{
#undef EMIT
#define EMIT(c) \
do { \
if (sb) strbuf_addch(sb, (c)); \
if (fp) fputc((c), fp); \
count++; \
} while (0)
#define EMITBUF(s, l) \
do { \
if (sb) strbuf_add(sb, (s), (l)); \
if (fp) fwrite((s), (l), 1, fp); \
count += (l); \
} while (0)
size_t len, count = 0;
const char *p = name;
for (;;) {
int ch;
len = next_quote_pos(p, maxlen);
if (len == maxlen || (maxlen < 0 && !p[len]))
break;
if (!no_dq && p == name)
EMIT('"');
EMITBUF(p, len);
EMIT('\\');
p += len;
ch = (unsigned char)*p++;
if (maxlen >= 0)
maxlen -= len + 1;
if (sq_lookup[ch] >= ' ') {
EMIT(sq_lookup[ch]);
} else {
EMIT(((ch >> 6) & 03) + '0');
EMIT(((ch >> 3) & 07) + '0');
EMIT(((ch >> 0) & 07) + '0');
}
}
EMITBUF(p, len);
if (p == name) /* no ending quote needed */
return 0;
if (!no_dq)
EMIT('"');
return count;
}
/* quote path as relative to the given prefix */
char *quote_path_relative(const char *in, int len,
struct strbuf *out, const char *prefix)
{
int needquote;
if (len < 0)
len = strlen(in);
/* "../" prefix itself does not need quoting, but "in" might. */
needquote = (next_quote_pos(in, len) < len);
strbuf_setlen(out, 0);
strbuf_grow(out, len);
if (needquote)
strbuf_addch(out, '"');
if (prefix) {
int off = 0;
while (prefix[off] && off < len && prefix[off] == in[off])
if (prefix[off] == '/') {
prefix += off + 1;
in += off + 1;
len -= off + 1;
off = 0;
} else
off++;
for (; *prefix; prefix++)
if (*prefix == '/')
strbuf_addstr(out, "../");
}
quote_c_style_counted (in, len, out, NULL, 1);
if (needquote)
strbuf_addch(out, '"');
if (!out->len)
strbuf_addstr(out, "./");
return out->buf;
}