1 files changed, 200 insertions, 1 deletions
diff --git a/common/stringx.c b/common/stringx.c
index 2246cf8..24cf9d1 100644
--- a/common/stringx.c
+++ b/common/stringx.c
@@ -36,9 +36,16 @@
  *
  */
 
-#include <string.h>
 #include "stringx.h"
 
+#include <string.h>
+#include <ctype.h>
+#include <assert.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#define WHITESPACE " \t\r\n\v"
+
 const char* trim_start(const char* data)
 {
   while(*data && isspace(*data))
@@ -64,3 +71,195 @@ char* trim_space(char* data)
   data = (char*)trim_start(data);
   return trim_end(data);
 }
+
+static int
+is_escaped (const char *string, const char *at)
+{
+	int escaped = 0;
+	while (at > string) {
+		at = at - 1;
+		if (*at != '\\')
+			break;
+		escaped = !escaped;
+	}
+	return escaped;
+}
+
+void
+str_unescape (char *str)
+{
+	int len = strlen (str);
+	char *at;
+
+	while (len > 0) {
+		at = strchr (str, '\\');
+		if (!at)
+			break;
+
+		len -= at - str;
+		str = at + 1;
+		--len;
+		memmove (at, str, len);
+		at[len] = 0;
+	}
+}
+
+char**
+str_array_parse_quoted (const char *data)
+{
+	char **array;
+	const char *at;
+	char quote;
+	int n;
+
+	assert (data);
+
+	array = str_array_create (NULL);
+
+	for (n = 0; 1; ++n) {
+		quote = 0;
+
+		/* Strip all leading blanks */
+		while (data && data[0] && strchr (WHITESPACE, data[0]))
+			++data;
+
+		if (!data || !data[0])
+			break;
+
+		/* See if the next character is a quote */
+		if (data[0] == '\'' || data[0] == '\"') {
+			quote = data[0];
+			++data;
+		}
+
+		if (quote) {
+			at = data;
+			do {
+				++data;
+				data = strchr (data, quote);
+			} while (data && is_escaped (at, data));
+
+			if (!data) {
+				array = str_array_append (array, at);
+			} else {
+				array = str_array_appendn (array, at, data - at);
+				++data;
+			}
+
+			str_unescape (array[n]);
+		} else {
+			at = data;
+			do {
+				++data;
+				data = data + strcspn (data, WHITESPACE);
+			} while (*data && is_escaped (at, data));
+
+			array = str_array_appendn (array, at, data - at);
+			str_unescape (array[n]);
+		}
+
+		if (!array)
+			break;
+	}
+
+	return array;
+}
+
+char**
+str_array_create (const char *first, ...)
+{
+	char **array;
+	char *value;
+	va_list va;
+
+	array = calloc (32, sizeof (char*));
+	if (!array)
+		return NULL;
+
+	if (first) {
+		array[0] = strdup (first);
+		if (!array[0]) {
+			free (array);
+			return NULL;
+		}
+
+		va_start (va, first);
+		while ((value = va_arg (va, char*)) != NULL) {
+			array = str_array_append (array, value);
+			if (!array)
+				break;
+		}
+		va_end (va);
+	}
+
+	return array;
+}
+
+unsigned int
+str_array_length (char **array)
+{
+	unsigned int length = 0;
+
+	assert (array);
+
+	while (*array) {
+		++length;
+		++array;
+	}
+	return length;
+}
+
+char**
+str_array_append (char **array, const char *next)
+{
+	assert (array);
+	assert (next);
+
+	return str_array_appendn (array, next, strlen (next));
+}
+
+char**
+str_array_appendn (char **array, const char *next, unsigned int len)
+{
+	char **narray;
+	int num;
+
+	assert (array);
+	assert (next || !len);
+
+	num = str_array_length (array);
+
+	/*
+	 * Actually because of intelligent libc this is not
+	 * as inefficient as it looks.
+	 */
+	narray = realloc (array, (num + 2) * sizeof (char*));
+	if (!narray) {
+		str_array_free (array);
+		return NULL;
+	}
+
+	narray[num] = malloc (len + 1);
+	if (!narray[num]) {
+		str_array_free (narray);
+		return NULL;
+	}
+	memcpy (narray[num], next, len);
+	narray[num][len] = 0;
+	narray[num + 1] = NULL;
+
+	return narray;
+}
+
+void
+str_array_free (char **array)
+{
+	char **a;
+
+	if (!array);
+		return;
+
+	for (a = array; *a; ++a)
+		free (*a);
+	free (array);
+}