Revert buffer2array() behavior back to tried and true 0.11.x version

Warren's fix in r4872 made phpMp work again, but also broke
the unit tests completely (they work in this version).

The version in 0.12.0 is far too buggy (it was from mpd-ke, what
do you expect?).  This one passes all the unit tests that the
mpd-ke one passed, and should also work with phpMp when used
with PHP magic quotes.

This also means we can search on 100 (or more) tags at once, so
no more arbitrary limits other than system memory.

To run the unit tests, just do this:
gcc -o t -DUNIT_TEST=1 src/buffer2array.c && ./t && echo OK

git-svn-id: https://svn.musicpd.org/mpd/trunk@4874 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 100 insertions, 43 deletions

diff --git a/src/buffer2array.c b/src/buffer2array.c
index 29dfdbce8..ef08bc32a 100644
--- a/src/buffer2array.c
+++ b/src/buffer2array.c
@@ -17,54 +17,111 @@
  */
 
 #include "buffer2array.h"
+#ifdef UNIT_TEST
+#  define xstrdup(x) strdup(x)
+#  define xmalloc(x) malloc(x)
+#else
+#  include "utils.h"
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <ctype.h>
 
-
-inline static
-int
-isWhiteSpace(char c)
+int buffer2array(char *origBuffer, char ***array)
 {
-	return (c == ' ' || c == '\t');
-}
+	int quotes = 0;
+	int count = 0;
+	int i;
+	int curr;
+	int *beginArray;
+	char *buffer = xstrdup(origBuffer);
+	int bufferLength = strlen(buffer);
+	char *markArray = xmalloc(sizeof(char) * (bufferLength + 1));
+
+	for (curr = 0; curr < bufferLength; curr++) {
+		if (!quotes && (buffer[curr] == ' ' || buffer[curr] == '\t')) {
+			markArray[curr] = '0';
+		} else if (buffer[curr] == '\"') {
+			if (curr > 0 && buffer[curr - 1] != '\\') {
+				quotes = quotes ? 0 : 1;
+				markArray[curr] = '0';
+			} else {
+				markArray[curr] = '1';
+			}
+		} else {
+			markArray[curr] = '1';
+		}
+		if (markArray[curr] == '1') {
+			if (curr > 0) {
+				if (markArray[curr - 1] == '0') {
+					count++;
+				}
+			} else {
+				count++;
+			}
+		}
+	}
+	markArray[bufferLength] = '\0';
 
-int buffer2array(char *buffer, char *array[], const int max)
-{
-	int i = 0;
-	char *c = buffer;
-
-	while (*c != '\0' && i < max) {
-		if (*c == '\"') {
-			array[i++] = ++c;
-			while (*c != '\0') {
-				if (*c == '\"') {
-					*(c++) = '\0';
-					break;
-				} 
-				else if (*(c++) == '\\') {
-					memmove(c - 1, c, strlen(c) + 1);
-					++c;
+	if (!count) {
+		free(buffer);
+		free(markArray);
+		return count;
+	}
+
+	beginArray = xmalloc(sizeof(int) * count);
+	(*array) = xmalloc(sizeof(char *) * count);
+
+	count = 0;
+
+	for (curr = 0; curr < bufferLength; curr++) {
+		if (markArray[curr] == '1') {
+			if (curr > 0) {
+				if (markArray[curr - 1] == '0') {
+					beginArray[count++] = curr;
 				}
+			} else {
+				beginArray[count++] = curr;
 			}
 		} else {
-			while (isWhiteSpace(*c))
-				++c;
-			array[i++] = c++;
-			if (*c == '\0')
-				return i;
-			while (!isWhiteSpace(*c) && *c != '\0')
-				++c;
+			buffer[curr] = '\0';
 		}
-		if (*c == '\0')
-			return i;
-		*(c++) = '\0';
-		while (isWhiteSpace(*c))
-			++c;
 	}
-	return i;
+
+	for (i = 0; i < count; i++) {
+		int len = strlen(buffer + beginArray[i]) + 1;
+		int arrayCurr = 0;
+		(*array)[i] = xmalloc(sizeof(char) * len);
+		for (curr = beginArray[i]; buffer[curr] != '\0'; curr++) {
+			if (buffer[curr] == '\\') {
+				if (buffer[curr + 1] != '\0') {
+					curr++;
+				}
+			}
+			(*array)[i][arrayCurr++] = buffer[curr];
+		}
+		(*array)[i][arrayCurr] = '\0';
+	}
+
+	free(markArray);
+	free(beginArray);
+	free(buffer);
+
+	return count;
+}
+
+void freeArgArray(char **array, int argArrayLength)
+{
+	int i;
+
+	if (argArrayLength == 0)
+		return;
+
+	for (i = 0; i < argArrayLength; i++) {
+		free(array[i]);
+	}
+	free(array);
 }
 
 #ifdef UNIT_TEST
@@ -75,42 +132,42 @@ int buffer2array(char *buffer, char *array[], const int max)
 
 int main()
 {
-	char *a[4] = { NULL };
+	char **a;
 	char *b;
 	int i, max;
 
 	b = xstrdup("lsinfo \"/some/dir/name \\\"test\\\"\"");
-	max = buffer2array(b, a, 4);
+	max = buffer2array(b, &a);
 	assert( !strcmp("lsinfo", a[0]) );
 	assert( !strcmp("/some/dir/name \"test\"", a[1]) );
 	assert( !a[2] );
 
 	b = xstrdup("lsinfo \"/some/dir/name \\\"test\\\" something else\"");
-	max = buffer2array(b, a, 4);
+	max = buffer2array(b, &a);
 	assert( !strcmp("lsinfo", a[0]) );
 	assert( !strcmp("/some/dir/name \"test\" something else", a[1]) );
 	assert( !a[2] );
 
 	b = xstrdup("lsinfo \"/some/dir\\\\name\"");
-	max = buffer2array(b, a, 4);
+	max = buffer2array(b, &a);
 	assert( !strcmp("lsinfo", a[0]) );
 	assert( !strcmp("/some/dir\\name", a[1]) );
 	assert( !a[2] );
 
 	b = xstrdup("lsinfo \"/some/dir name\"");
-	max = buffer2array(b, a, 4);
+	max = buffer2array(b, &a);
 	assert( !strcmp("lsinfo", a[0]) );
 	assert( !strcmp("/some/dir name", a[1]) );
 	assert( !a[2] );
 
 	b = xstrdup("lsinfo \"\\\"/some/dir\\\"\"");
-	max = buffer2array(b, a, 4);
+	max = buffer2array(b, &a);
 	assert( !strcmp("lsinfo", a[0]) );
 	assert( !strcmp("\"/some/dir\"", a[1]) );
 	assert( !a[2] );
 
 	b = xstrdup("lsinfo \"\\\"/some/dir\\\" x\"");
-	max = buffer2array(b, a, 4);
+	max = buffer2array(b, &a);
 	assert( !strcmp("lsinfo", a[0]) );
 	assert( !strcmp("\"/some/dir\" x", a[1]) );
 	assert( !a[2] );