X-Git-Url: https://git.octo.it/?p=git.git;a=blobdiff_plain;f=quote.c;h=06792d47c3e324ee9893a4e52035f0642f38005f;hp=009e69494b007fc7bfe590029c144d9ce41aa6b5;hb=HEAD;hpb=28fba290e3868a41e36379906407cf318cedfe57

diff --git a/quote.c b/quote.c
index 009e6949..06792d47 100644
--- a/quote.c
+++ b/quote.c
@@ -15,6 +15,11 @@
 #undef EMIT
 #define EMIT(x) ( (++len < n) && (*bp++ = (x)) )
 
+static inline int need_bs_quote(char c)
+{
+	return (c == '\'' || c == '!');
+}
+
 size_t sq_quote_buf(char *dst, size_t n, const char *src)
 {
 	char c;
@@ -23,7 +28,7 @@ size_t sq_quote_buf(char *dst, size_t n, const char *src)
 
 	EMIT('\'');
 	while ((c = *src++)) {
-		if (c == '\'' || c == '!') {
+		if (need_bs_quote(c)) {
 			EMIT('\'');
 			EMIT('\\');
 			EMIT(c);
@@ -52,6 +57,40 @@ char *sq_quote(const char *src)
 	return buf;
 }
 
+char *sq_dequote(char *arg)
+{
+	char *dst = arg;
+	char *src = arg;
+	char c;
+
+	if (*src != '\'')
+		return NULL;
+	for (;;) {
+		c = *++src;
+		if (!c)
+			return NULL;
+		if (c != '\'') {
+			*dst++ = c;
+			continue;
+		}
+		/* We stepped out of sq */
+		switch (*++src) {
+		case '\0':
+			*dst = 0;
+			return arg;
+		case '\\':
+			c = *++src;
+			if (need_bs_quote(c) && *++src == '\'') {
+				*dst++ = c;
+				continue;
+			}
+		/* Fallthrough */
+		default:
+			return NULL;
+		}
+	}
+}
+
 /*
  * C-style name quoting.
  *
@@ -73,7 +112,8 @@ char *sq_quote(const char *src)
  *     but not enclosed in double-quote pair.  Return value is undefined.
  */
 
-int quote_c_style(const char *name, char *outbuf, FILE *outfp, int no_dq)
+static int quote_c_style_counted(const char *name, int namelen,
+				 char *outbuf, FILE *outfp, int no_dq)
 {
 #undef EMIT
 #define EMIT(c) \
@@ -86,8 +126,10 @@ int quote_c_style(const char *name, char *outbuf, FILE *outfp, int no_dq)
 
 	if (!no_dq)
 		EMIT('"');
-	for (sp = name; (ch = *sp++); ) {
-
+	for (sp = name; sp < name + namelen; sp++) {
+		ch = *sp;
+		if (!ch)
+			break;
 		if ((ch < ' ') || (ch == '"') || (ch == '\\') ||
 		    (ch == 0177)) {
 			needquote = 1;
@@ -102,8 +144,6 @@ int quote_c_style(const char *name, char *outbuf, FILE *outfp, int no_dq)
 
 			case '\\': /* fallthru */
 			case '"': EMITQ(); break;
-			case ' ':
-				break;
 			default:
 				/* octal */
 				EMITQ();
@@ -123,6 +163,12 @@ int quote_c_style(const char *name, char *outbuf, FILE *outfp, int no_dq)
 	return needquote ? count : 0;
 }
 
+int quote_c_style(const char *name, char *outbuf, FILE *outfp, int no_dq)
+{
+	int cnt = strlen(name);
+	return quote_c_style_counted(name, cnt, outbuf, outfp, no_dq);
+}
+
 /*
  * C-style name unquoting.
  *
@@ -188,28 +234,30 @@ char *unquote_c_style(const char *quoted, const char **endp)
 	}
 }
 
-void write_name_quoted(const char *prefix, const char *name,
-		       int quote, FILE *out)
+void write_name_quoted(const char *prefix, int prefix_len,
+		       const char *name, int quote, FILE *out)
 {
 	int needquote;
 
 	if (!quote) {
 	no_quote:
-		if (prefix && prefix[0])
-			fputs(prefix, out);
+		if (prefix_len)
+			fprintf(out, "%.*s", prefix_len, prefix);
 		fputs(name, out);
 		return;
 	}
 
 	needquote = 0;
-	if (prefix && prefix[0])
-		needquote = quote_c_style(prefix, NULL, NULL, 0);
+	if (prefix_len)
+		needquote = quote_c_style_counted(prefix, prefix_len,
+						  NULL, NULL, 0);
 	if (!needquote)
 		needquote = quote_c_style(name, NULL, NULL, 0);
 	if (needquote) {
 		fputc('"', out);
-		if (prefix && prefix[0])
-			quote_c_style(prefix, NULL, out, 1);
+		if (prefix_len)
+			quote_c_style_counted(prefix, prefix_len,
+					      NULL, out, 1);
 		quote_c_style(name, NULL, out, 1);
 		fputc('"', out);
 	}