X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fbasic%2Fescape.c;h=564149306c91a310d2af1d72ac229e4c67b32c65;hp=4815161b092afb5d1d04eef1856b8db7341d6ca9;hb=2ed028df72f5995acfbeca89db3f056d0e83cac1;hpb=b96ed50e3493103d075ff2ce4c3fbad8f26b2e22
diff --git a/src/basic/escape.c b/src/basic/escape.c
index 4815161b0..564149306 100644
--- a/src/basic/escape.c
+++ b/src/basic/escape.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
@@ -19,12 +17,15 @@
along with systemd; If not, see .
***/
+#include
+#include
+#include
+
#include "alloc-util.h"
#include "escape.h"
#include "hexdecoct.h"
-#include "string-util.h"
+#include "macro.h"
#include "utf8.h"
-#include "util.h"
size_t cescape_char(char c, char *buf) {
char * buf_old = buf;
@@ -89,20 +90,20 @@ size_t cescape_char(char c, char *buf) {
return buf - buf_old;
}
-char *cescape(const char *s) {
- char *r, *t;
+char *cescape_length(const char *s, size_t n) {
const char *f;
+ char *r, *t;
- assert(s);
+ assert(s || n == 0);
/* Does C style string escaping. May be reversed with
* cunescape(). */
- r = new(char, strlen(s)*4 + 1);
+ r = new(char, n*4 + 1);
if (!r)
return NULL;
- for (f = s, t = r; *f; f++)
+ for (f = s, t = r; f < s + n; f++)
t += cescape_char(*f, t);
*t = 0;
@@ -110,16 +111,24 @@ char *cescape(const char *s) {
return r;
}
-int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) {
+char *cescape(const char *s) {
+ assert(s);
+
+ return cescape_length(s, strlen(s));
+}
+
+int cunescape_one(const char *p, size_t length, char32_t *ret, bool *eight_bit) {
int r = 1;
assert(p);
assert(*p);
assert(ret);
- /* Unescapes C style. Returns the unescaped character in ret,
- * unless we encountered a \u sequence in which case the full
- * unicode character is returned in ret_unicode, instead. */
+ /* Unescapes C style. Returns the unescaped character in ret.
+ * Sets *eight_bit to true if the escaped sequence either fits in
+ * one byte in UTF-8 or is a non-unicode literal byte and should
+ * instead be copied directly.
+ */
if (length != (size_t) -1 && length < 1)
return -EINVAL;
@@ -181,7 +190,8 @@ int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode
if (a == 0 && b == 0)
return -EINVAL;
- *ret = (char) ((a << 4U) | b);
+ *ret = (a << 4U) | b;
+ *eight_bit = true;
r = 3;
break;
}
@@ -208,16 +218,7 @@ int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode
if (c == 0)
return -EINVAL;
- if (c < 128)
- *ret = c;
- else {
- if (!ret_unicode)
- return -EINVAL;
-
- *ret = 0;
- *ret_unicode = c;
- }
-
+ *ret = c;
r = 5;
break;
}
@@ -227,7 +228,7 @@ int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode
int a[8];
unsigned i;
- uint32_t c;
+ char32_t c;
if (length != (size_t) -1 && length < 9)
return -EINVAL;
@@ -249,16 +250,7 @@ int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode
if (!unichar_is_valid(c))
return -EINVAL;
- if (c < 128)
- *ret = c;
- else {
- if (!ret_unicode)
- return -EINVAL;
-
- *ret = 0;
- *ret_unicode = c;
- }
-
+ *ret = c;
r = 9;
break;
}
@@ -273,7 +265,7 @@ int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode
case '7': {
/* octal encoding */
int a, b, c;
- uint32_t m;
+ char32_t m;
if (length != (size_t) -1 && length < 3)
return -EINVAL;
@@ -300,6 +292,7 @@ int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode
return -EINVAL;
*ret = m;
+ *eight_bit = true;
r = 3;
break;
}
@@ -332,8 +325,8 @@ int cunescape_length_with_prefix(const char *s, size_t length, const char *prefi
for (f = s, t = r + pl; f < s + length; f++) {
size_t remaining;
- uint32_t u;
- char c;
+ bool eight_bit = false;
+ char32_t u;
int k;
remaining = s + length - f;
@@ -356,7 +349,7 @@ int cunescape_length_with_prefix(const char *s, size_t length, const char *prefi
return -EINVAL;
}
- k = cunescape_one(f + 1, remaining - 1, &c, &u);
+ k = cunescape_one(f + 1, remaining - 1, &u, &eight_bit);
if (k < 0) {
if (flags & UNESCAPE_RELAX) {
/* Invalid escape code, let's take it literal then */
@@ -368,14 +361,13 @@ int cunescape_length_with_prefix(const char *s, size_t length, const char *prefi
return k;
}
- if (c != 0)
- /* Non-Unicode? Let's encode this directly */
- *(t++) = c;
+ f += k;
+ if (eight_bit)
+ /* One byte? Set directly as specified */
+ *(t++) = u;
else
- /* Unicode? Then let's encode this in UTF-8 */
+ /* Otherwise encode as multi-byte UTF-8 */
t += utf8_encode_unichar(t, u);
-
- f += k;
}
*t = 0;
@@ -421,6 +413,7 @@ char *xescape(const char *s, const char *bad) {
return r;
}
+#if 0 /// UNNEEDED by elogind
static char *strcpy_backslash_escaped(char *t, const char *s, const char *bad) {
assert(bad);
@@ -480,3 +473,4 @@ char *shell_maybe_quote(const char *s) {
return r;
}
+#endif // 0