--- libelwix/src/json.c	2017/11/24 15:52:57	1.1.2.2
+++ libelwix/src/json.c	2017/11/28 11:14:00	1.1.2.6
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: json.c,v 1.1.2.2 2017/11/24 15:52:57 misho Exp $
+* $Id: json.c,v 1.1.2.6 2017/11/28 11:14:00 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -105,6 +105,150 @@ json_free(json_t * __restrict json)
 	}
 }
 
+static jtok_t *
+json_gettoken(json_t * __restrict json, jtok_t * __restrict jtoks, u_int toksnum)
+{
+	jtok_t *tok;
+
+	assert(json || !(!jtoks && toksnum));
+
+	if (json->h_next >= toksnum) {
+		elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
+		return NULL;
+	} else
+		tok = &jtoks[json->h_next];
+	tok->tok_idx = json->h_next++;
+	tok->tok_start = tok->tok_end = tok->tok_parent = -1;
+	tok->tok_size = 0;
+
+	return tok;
+}
+
+inline void
+json_filltoken(jtok_t * __restrict tok, jtype_t type, long start, long end, long parent)
+{
+	assert(tok);
+
+	tok->tok_type = type;
+	tok->tok_start = start;
+	tok->tok_end = end;
+	tok->tok_parent = parent;
+	tok->tok_size = 0;
+}
+
+static int
+json_parse_string(json_t * __restrict json, const char *jstr, size_t jlen, jtok_t * __restrict jtoks, u_int toksnum)
+{
+	jtok_t	*tok;
+	u_long pos;
+	char ch;
+	register int i;
+
+	assert(json || jstr || !(!jtoks && toksnum));
+
+	for (pos = json->h_pos++; json->h_pos < jlen && jstr[json->h_pos]; json->h_pos++) {
+		ch = jstr[json->h_pos];
+
+		if (ch == '\"') {
+			if (!jtoks)
+				return 0;
+			if (!(tok = json_gettoken(json, jtoks, toksnum))) {
+				json->h_pos = pos;
+				return -1;
+			} else
+				json_filltoken(tok, J_STRING, pos + 1, json->h_pos, json->h_parent);
+			return 0;
+		}
+
+		if (ch == '\\' && json->h_pos + 1 < jlen) {
+			switch (jstr[++json->h_pos]) {
+				case '\"':
+				case '/':
+				case '\\':
+				case 'b':
+				case 'f':
+				case 'r':
+				case 'n':
+				case 't':
+					/* Allowed escaped symbols */
+					break;
+				case 'u':
+					/* Allows escaped symbol \uXXXX */
+					json->h_pos++;
+					for (i = 0; i < 4 && json->h_pos < jlen && jstr[json->h_pos]; i++, json->h_pos++) {
+						/* If it isn't a hex character we have an error */
+						if (!((jstr[json->h_pos] >= 48 && jstr[json->h_pos] <= 57) || /* 0-9 */
+								(jstr[json->h_pos] >= 65 && jstr[json->h_pos] <= 70) || /* A-F */
+								(jstr[json->h_pos] >= 97 && jstr[json->h_pos] <= 102))) { /* a-f */
+							json->h_pos = pos;
+							elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
+							return -1;
+						}
+					}
+					json->h_pos--;
+					break;
+				default:
+					/* Unexpected symbol */
+					json->h_pos = pos;
+					elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
+					return -1;
+			}
+		}
+	}
+
+	json->h_pos = pos;
+	elwix_SetErr(J_ERR_PART, "%s", jerrstr[J_ERR_PART]);
+	return -1;
+}
+
+static int
+json_parse_value(json_t * __restrict json, const char *jstr, size_t jlen, jtok_t * __restrict jtoks, u_int toksnum)
+{
+	jtok_t	*tok;
+	u_long pos;
+
+	assert(json || jstr || !(!jtoks && toksnum));
+
+	for (pos = json->h_pos; json->h_pos < jlen && jstr[json->h_pos]; json->h_pos++) {
+		switch (jstr[json->h_pos]) {
+			case ':':
+				if (json->h_strict)
+					goto found;
+				break;
+			case '\t':
+			case '\r':
+			case '\n':
+			case ' ':
+			case ',':
+			case ']':
+			case '}':
+				goto found;
+		}
+		if (jstr[json->h_pos] < 32 || jstr[json->h_pos] > 127) {
+			json->h_pos = pos;
+			elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
+			return -1;
+		}
+	}
+
+	if (json->h_strict) {
+		json->h_pos = pos;
+		elwix_SetErr(J_ERR_PART, "%s", jerrstr[J_ERR_PART]);
+		return -1;
+	}
+found:
+	if (jtoks) {
+		if (!(tok = json_gettoken(json, jtoks, toksnum))) {
+			json->h_pos = pos;
+			return -1;
+		} else
+			json_filltoken(tok, J_VALUE, pos, json->h_pos, json->h_parent);
+	}
+
+	json->h_pos--;
+	return 0;
+}
+
 /*
  * json_parse() - Parse JSON string
  *
@@ -133,15 +277,13 @@ json_parse(json_t * __restrict json, const char *jstr,
 		switch ((ch = jstr[json->h_pos])) {
 			case '{':
 			case '[':
-				cx++;	/* start new token */
+				cx++;	/* start new object/array token */
 				if (!jtoks)
 					break;
 
 				tok = json_gettoken(json, jtoks, toksnum);
-				if (!tok) {
-					elwix_SetErr(J_ERR_NOMEM, "%s", jerrstr[J_ERR_NOMEM]);
+				if (!tok)
 					return (u_int) -1;
-				}
 				if (json->h_parent != -1) {
 					jtoks[json->h_parent].tok_size++;
 					tok->tok_parent = json->h_parent;
@@ -187,7 +329,7 @@ json_parse(json_t * __restrict json, const char *jstr,
 					elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
 					return (u_int) -1;
 				}
-				cx++;
+				cx++;	/* start new string token */
 				if (jtoks && json->h_parent != -1)
 					jtoks[json->h_parent].tok_size++;
 				break;
@@ -220,25 +362,24 @@ json_parse(json_t * __restrict json, const char *jstr,
 			case 't':
 			case 'f':
 			case 'n':
-				if (!json->h_strict)
-					break;
+				if (json->h_strict) {
+					if (jtoks && json->h_parent != -1) {
+						/* they must not be keys of the object */
+						if (jtoks[json->h_parent].tok_type == J_OBJECT || 
+								(jtoks[json->h_parent].tok_type == J_STRING && 
+								 jtoks[json->h_parent].tok_size)) {
+							elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
+							return (u_int) -1;
+						}
+					}
 
-				if (jtoks && json->h_parent != -1) {
-					/* they must not be keys of the object */
-					if (jtoks[json->h_parent].tok_type == J_OBJECT || 
-							(jtoks[json->h_parent].tok_type == J_STRING && 
-							 jtoks[json->h_parent].tok_size)) {
-						elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
+					if (json_parse_value(json, jstr, jlen, jtoks, toksnum) == -1)
 						return (u_int) -1;
-					}
+					cx++;	/* start new value token */
+					if (jtoks && json->h_parent != -1)
+						jtoks[json->h_parent].tok_size++;
+					break;
 				}
-
-				if (json_parse_value(json, jstr, jlen, jtoks, toksnum) == -1)
-					return (u_int) -1;
-				cx++;
-				if (jtoks && json->h_parent != -1)
-					jtoks[json->h_parent].tok_size++;
-				break;
 			default:
 				if (json->h_strict) {
 					elwix_SetErr(J_ERR_INVAL, "%s", jerrstr[J_ERR_INVAL]);
@@ -247,7 +388,7 @@ json_parse(json_t * __restrict json, const char *jstr,
 
 				if (json_parse_value(json, jstr, jlen, jtoks, toksnum) == -1)
 					return (u_int) -1;
-				cx++;
+				cx++;	/* start new value token */
 				if (jtoks && json->h_parent != -1)
 					jtoks[json->h_parent].tok_size++;
 				break;
@@ -262,7 +403,170 @@ json_parse(json_t * __restrict json, const char *jstr,
 				return (u_int) -1;
 			}
 		}
-	}
+	} else
+		cx++;	/* increment needed tokens number for termination empty token */
 
 	return cx;
+}
+
+/*
+ * json_token2val() - Return token to AIT variable
+ *
+ * @jstr = JSON string
+ * @tok = Token for convert
+ * @return =NULL error or !=NULL allocated variable, after use should be ait_freeVar()
+ */
+ait_val_t *
+json_token2val(const char *jstr, jtok_t * __restrict tok)
+{
+	ait_val_t *v = NULL;
+
+	if (!jstr || !tok)
+		return NULL;
+
+	v = ait_allocVar();
+	if (!v)
+		return NULL;
+
+	AIT_SET_STRSIZ(v, tok->tok_end - tok->tok_start);
+	strncpy(AIT_GET_STR(v), jstr + tok->tok_start, AIT_LEN(v) - 1);
+
+	return v;
+}
+
+/*
+ * json_token2str() - Return token to string
+ *
+ * @jstr = JSON string
+ * @tok = Token for convert
+ * @return =NULL error or !=NULL allocated str, after use should be e_free()
+ */
+char *
+json_token2str(const char *jstr, jtok_t * __restrict tok)
+{
+	char *str = NULL;
+	size_t len;
+
+	if (!jstr || !tok)
+		return NULL;
+
+	len = tok->tok_end - tok->tok_start;
+	str = e_malloc(len + 1);
+	if (!str)
+		return NULL;
+	else {
+		strncpy(str, jstr + tok->tok_start, len);
+		str[len] = 0;
+	}
+
+	return str;
+}
+
+/*
+ * json_token2num() - Return token to numeric
+ *
+ * @jstr = JSON string
+ * @tok = Token for convert
+ * @return number
+ */
+long
+json_token2num(const char *jstr, jtok_t * __restrict tok)
+{
+	long ret = 0;
+	char *str;
+
+	str = json_token2str(jstr, tok);
+	if (!str)
+		return 0;
+
+	ret = strtol(str, NULL, 0);
+	e_free(str);
+	return ret;
+}
+
+/*
+ * json_findbykey() - Find data by key
+ *
+ * @jstr = JSON string
+ * @key = Search key
+ * @toks = Parsed tokens
+ * @toksnum = Number of parsed tokens
+ * return: =NULL error or !=NULL data token found 
+ */
+jtok_t *
+json_findbykey(const char *jstr, const char *key, jtok_t * __restrict toks, int toksnum)
+{
+	jtok_t *tok = NULL;
+	register int i;
+	int klen;
+
+	if (!jstr || !key || !toks)
+		return NULL;
+	else
+		klen = strlen(key);
+
+	for (i = 1; i < toksnum; i++) {
+		if (toks[i].tok_type == J_STRING && 
+				klen == toks[i].tok_end - toks[i].tok_start && 
+				!strncmp(jstr + toks[i].tok_start, key, klen)) {
+			tok = toks + i + 1;
+			break;
+		}
+	}
+
+	return tok;
+}
+
+/*
+ * json_token2array() - Convert token to string array
+ *
+ * @jstr = JSON string
+ * @tok = Token for convert
+ * return: =NULL error or !=NULL allocated array with string variables, 
+ * 		after use should be ait_freeVars()
+ */
+array_t *
+json_token2array(const char *jstr, jtok_t * __restrict tok)
+{
+	array_t *arr = NULL;
+	register int i;
+	int siz;
+	ait_val_t *v;
+	jtok_t *t;
+
+	if (!jstr || !tok)
+		return NULL;
+
+	siz = tok->tok_size;
+	if (!siz && json_toktype(tok) != J_ARRAY && json_toktype(tok) != J_OBJECT)
+		siz++;
+
+	arr = ait_allocVars(siz);
+	if (!arr)
+		return NULL;
+
+	if (tok->tok_type == J_STRING || tok->tok_type == J_VALUE) {
+		v = ait_getVars(&arr, 0);
+		AIT_SET_STRSIZ(v, json_toklen(tok) + 1);
+		json_tokstrcpy(AIT_GET_STR(v), jstr, tok);
+	} else if (tok->tok_type == J_ARRAY) {
+		for (i = 0; i < tok->tok_size; i++) {
+			t = &tok[i + 1];
+			v = ait_getVars(&arr, i);
+			AIT_SET_STRSIZ(v, json_toklen(t) + 1);
+			json_tokstrcpy(AIT_GET_STR(v), jstr, t);
+		}
+	} else if (tok->tok_type == J_OBJECT) {
+		for (i = 0; tok->tok_idx <= tok[i + 1].tok_parent; i++) {
+			t = &tok[i + 1];
+			v = ait_getVars(&arr, i);
+			AIT_SET_STRSIZ(v, json_toklen(t) + 1);
+			json_tokstrcpy(AIT_GET_STR(v), jstr, t);
+		}
+	} else {
+		elwix_SetErr(J_ERR_PARAM, "%s", jerrstr[J_ERR_PARAM]);
+		return NULL;
+	}
+
+	return arr;
 }