From 95c189f7445e6deca85130b7b8fa25dc76fabe12 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Mon, 16 Aug 2021 13:41:20 +0200
Subject: Add indexing and example

---
 src/XpathParser.c | 51 ++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 38 insertions(+), 13 deletions(-)

(limited to 'src/XpathParser.c')

diff --git a/src/XpathParser.c b/src/XpathParser.c
index f3248eb..b79fe11 100644
--- a/src/XpathParser.c
+++ b/src/XpathParser.c
@@ -18,26 +18,29 @@ static void quickmedia_xpath_parser_init(QuickMediaXpathParser *self, const char
     quickmedia_xpath_tokenizer_init(&self->tokenizer, xpath);
 }
 
-/*   ('[' IDENTIFIER '=' '"' STRING '"' ']')?   */
+/*   (('[' IDENTIFIER '=' '"' STRING '"' ']') | ('[' NUMBER ']'))?   */
 static int xpath_parse_param(QuickMediaXpathParser *self, QuickMediaNodeSearchParam *result) {
     if(quickmedia_xpath_tokenizer_next_if(&self->tokenizer, QUICKMEDIA_XPATH_TOKEN_OPEN_BRACKET) != 0)
         return 1;
 
     QuickMediaXpathToken token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
-    if(token != QUICKMEDIA_XPATH_TOKEN_IDENTIFIER)
-        return -1;
-    
-    result->name = self->tokenizer.identifier;
+    if(token == QUICKMEDIA_XPATH_TOKEN_IDENTIFIER) {
+        result->name = self->tokenizer.identifier;
 
-    token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
-    if(token != QUICKMEDIA_XPATH_TOKEN_EQUAL)
-        return -2;
+        token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
+        if(token != QUICKMEDIA_XPATH_TOKEN_EQUAL)
+            return -2;
 
-    token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
-    if(token != QUICKMEDIA_XPATH_TOKEN_STRING)
-        return -3;
-    
-    result->value = self->tokenizer.string;
+        token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
+        if(token != QUICKMEDIA_XPATH_TOKEN_STRING)
+            return -3;
+        
+        result->value = self->tokenizer.string;
+    } else if(token == QUICKMEDIA_XPATH_TOKEN_NUMBER) {
+        result->index = self->tokenizer.number;
+    } else {
+        return -1;
+    }
 
     token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
     if(token != QUICKMEDIA_XPATH_TOKEN_CLOSING_BRACKET)
@@ -48,6 +51,24 @@ static int xpath_parse_param(QuickMediaXpathParser *self, QuickMediaNodeSearchPa
     return 0;
 }
 
+/*   ('[' NUMBER ']'))?   */
+static int xpath_parse_index(QuickMediaXpathParser *self, QuickMediaNodeSearchParam *result) {
+    if(quickmedia_xpath_tokenizer_next_if(&self->tokenizer, QUICKMEDIA_XPATH_TOKEN_OPEN_BRACKET) != 0)
+        return 1;
+
+    QuickMediaXpathToken token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
+    if(token != QUICKMEDIA_XPATH_TOKEN_NUMBER)
+        return -1;
+
+    result->index = self->tokenizer.number;
+
+    token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
+    if(token != QUICKMEDIA_XPATH_TOKEN_CLOSING_BRACKET)
+        return -4;
+
+    return 0;
+}
+
 static int xpath_parse_node(QuickMediaXpathParser *self, QuickMediaNodeSearch *result) {
     quickmedia_node_search_init(result);
     QuickMediaXpathToken token = quickmedia_xpath_tokenizer_next(&self->tokenizer);
@@ -65,6 +86,10 @@ static int xpath_parse_node(QuickMediaXpathParser *self, QuickMediaNodeSearch *r
         if(param_result < 0)
             return param_result;
 
+        int index_result = xpath_parse_index(self, &result->param);
+        if(index_result < 0)
+            return index_result;
+
         result->child = malloc(sizeof(QuickMediaNodeSearch));
         if(!result->child)
             return -1;
-- 
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