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src/libudev/util.c: reintroduce cescape and octchar

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This commit is contained in:
Anthony G. Basile 2013-09-10 07:05:19 -04:00
parent 15ab35551b
commit 254466e4a0
2 changed files with 82 additions and 0 deletions
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80
src/libudev/util.c
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@ -551,6 +551,86 @@ char hexchar(int x) {
return table[x & 15];
}
char octchar(int x) {
return '0' + (x & 7);
}
char *cescape(const char *s) {
char *r, *t;
const char *f;
assert(s);
/* Does C style string escaping. */
r = new(char, strlen(s)*4 + 1);
if (!r)
return NULL;
for (f = s, t = r; *f; f++)
switch (*f) {
case '\a':
*(t++) = '\\';
*(t++) = 'a';
break;
case '\b':
*(t++) = '\\';
*(t++) = 'b';
break;
case '\f':
*(t++) = '\\';
*(t++) = 'f';
break;
case '\n':
*(t++) = '\\';
*(t++) = 'n';
break;
case '\r':
*(t++) = '\\';
*(t++) = 'r';
break;
case '\t':
*(t++) = '\\';
*(t++) = 't';
break;
case '\v':
*(t++) = '\\';
*(t++) = 'v';
break;
case '\\':
*(t++) = '\\';
*(t++) = '\\';
break;
case '"':
*(t++) = '\\';
*(t++) = '"';
break;
case '\'':
*(t++) = '\\';
*(t++) = '\'';
break;
default:
/* For special chars we prefer octal over
* hexadecimal encoding, simply because glib's
* g_strescape() does the same */
if ((*f < ' ') || (*f >= 127)) {
*(t++) = '\\';
*(t++) = octchar((unsigned char) *f >> 6);
*(t++) = octchar((unsigned char) *f >> 3);
*(t++) = octchar((unsigned char) *f);
} else
*(t++) = *f;
break;
}
*t = 0;
return r;
}
char *xescape(const char *s, const char *bad) {
char *r, *t;
const char *f;

2
src/libudev/util.h
View File

@ -131,8 +131,10 @@ char *strnappend(const char *s, const char *suffix, size_t length);
char *truncate_nl(char *s);
char octchar(int x) _const_;
char hexchar(int x) _const_;
char *cescape(const char *s);
char *xescape(const char *s, const char *bad);
bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;