replace buffer2array() with cstrtok() from mpd-ke

This modifies the string in place, and does not allocate any memory from
the heap.  This is considerably smaller than the function it replaces,
and will be instrumental in getting the commands/conf malloc reductions
done.

git-svn-id: https://svn.musicpd.org/mpd/trunk@4481 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/buffer2array.c

@@ -21,99 +21,43 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 
-int buffer2array(char *origBuffer, char ***array)
+int cstrtok(char *buffer, char *array[], const int max)
 {
-	int quotes = 0;
-	int count = 0;
-	int i;
-	int curr;
-	int *beginArray;
-	char *buffer = strdup(origBuffer);
-	int bufferLength = strlen(buffer);
-	char *markArray = malloc(sizeof(char) * (bufferLength + 1));
+	int i = 0;
+	char *c = buffer;
 
-	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';
+	while (*c != '\0' && i < max) {
+		if (*c == '\"') {
+			int escape = 0;
+			array[i++] = ++c;
+			while (*c != '\0') {
+				if (*c == '\"') {
+					if (escape)
+						memmove(c - 1, c,
+							strlen(c) + 1);
+					else {
+						*(c++) = '\0';
+						break;
+					}
+				}
+				escape = (*(c++) != '\\') ? 0 : !escape;
 			}
 		} else {
-			markArray[curr] = '1';
-		}
-		if (markArray[curr] == '1') {
-			if (curr > 0) {
-				if (markArray[curr - 1] == '0') {
-					count++;
-				}
-			} else {
-				count++;
-			}
+			while (isspace(*c))
+				++c;
+			array[i++] = c++;
+			if (*c == '\0')
+				return i;
+			while (!isspace(*c) && *c != '\0')
+				++c;
 		}
+		if (*c == '\0')
+			return i;
+		*(c++) = '\0';
+		while (isspace(*c))
+			++c;
 	}
-	markArray[bufferLength] = '\0';
-
-	if (!count) {
-		free(buffer);
-		free(markArray);
-		return count;
-	}
-
-	beginArray = malloc(sizeof(int) * count);
-	(*array) = malloc(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 {
-			buffer[curr] = '\0';
-		}
-	}
-
-	for (i = 0; i < count; i++) {
-		int len = strlen(buffer + beginArray[i]) + 1;
-		int arrayCurr = 0;
-		(*array)[i] = malloc(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);
+	return i;
 }