libyang CHANGE extend input handler by line counter

So far, all the parsers were counting lines on their own, in the
parsers' specific variables. The patch unifies the place where the
line is counted and store it in the input handler.
diff --git a/src/parser_yang.c b/src/parser_yang.c
index da537a0..0019403 100644
--- a/src/parser_yang.c
+++ b/src/parser_yang.c
@@ -50,7 +50,7 @@
  * @param[in] CTX yang parser context to update its indent value.
  * @param[in] COUNT number of items for which the DATA pointer is supposed to move on.
  */
-#define MOVE_INPUT(CTX, COUNT) ly_in_skip(CTX->in, COUNT);(CTX)->indent+=COUNT
+#define MOVE_INPUT(CTX, COUNT) ly_in_skip((CTX)->in, COUNT);(CTX)->indent+=COUNT
 
 /**
  * @brief Loop through all substatements providing, return if there are none.
@@ -232,14 +232,14 @@
         case COMMENT_LINE:
             if (ctx->in->current[0] == '\n') {
                 comment = COMMENT_NO;
-                ++ctx->line;
+                LY_IN_NEW_LINE(ctx->in);
             }
             break;
         case COMMENT_BLOCK:
             if (ctx->in->current[0] == '*') {
                 comment = COMMENT_BLOCK_END;
             } else if (ctx->in->current[0] == '\n') {
-                ++ctx->line;
+                LY_IN_NEW_LINE(ctx->in);
             }
             break;
         case COMMENT_BLOCK_END:
@@ -247,7 +247,7 @@
                 comment = COMMENT_NO;
             } else if (ctx->in->current[0] != '*') {
                 if (ctx->in->current[0] == '\n') {
-                    ++ctx->line;
+                    LY_IN_NEW_LINE(ctx->in);
                 }
                 comment = COMMENT_BLOCK;
             }
@@ -407,9 +407,6 @@
                 /* check and store character */
                 LY_CHECK_RET(buf_store_char(ctx, arg, word_p, word_len, word_b, buf_len, need_buf, &prefix));
 
-                /* maintain line number */
-                ++ctx->line;
-
                 /* reset context indentation counter for possible string after this one */
                 ctx->indent = 0;
                 trailing_ws = 0;
@@ -458,8 +455,6 @@
                 need_buf = 1;
                 break;
             case '\n':
-                ++ctx->line;
-            /* fall through */
             case ' ':
             case '\t':
                 /* just skip */
@@ -473,8 +468,6 @@
         case STRING_PAUSED_CONTINUE:
             switch (ctx->in->current[0]) {
             case '\n':
-                ++ctx->line;
-            /* fall through */
             case ' ':
             case '\t':
                 /* skip */
@@ -591,13 +584,10 @@
                 /* word is finished */
                 goto str_end;
             }
+            MOVE_INPUT(ctx, 1);
+
             /* reset indent */
             ctx->indent = 0;
-
-            /* track line numbers */
-            ++ctx->line;
-
-            ++ctx->in->current;
             break;
         case ';':
         case '{':
@@ -677,7 +667,6 @@
             continue;
         case '\n':
             /* skip whitespaces (optsep) */
-            ++ctx->line;
             ctx->indent = 0;
             break;
         case ' ':
@@ -698,7 +687,7 @@
 
 keyword_start:
     word_start = ctx->in->current;
-    *kw = lysp_match_kw(ctx, ctx->in);
+    *kw = lysp_match_kw(ctx->in, &ctx->indent);
 
     if ((*kw == LY_STMT_SYNTAX_SEMICOLON) || (*kw == LY_STMT_SYNTAX_LEFT_BRACE) || (*kw == LY_STMT_SYNTAX_RIGHT_BRACE)) {
         goto success;
@@ -735,8 +724,8 @@
         /* still can be an extension */
         prefix = 0;
 extension:
-        while (ctx->in->current[0] && (ctx->in->current[0] != ' ') && (ctx->in->current[0] != '\t') && (ctx->in->current[0] != '\n') &&
-                (ctx->in->current[0] != '{') && (ctx->in->current[0] != ';')) {
+        while (ctx->in->current[0] && (ctx->in->current[0] != ' ') && (ctx->in->current[0] != '\t') &&
+                (ctx->in->current[0] != '\n') && (ctx->in->current[0] != '{') && (ctx->in->current[0] != ';')) {
             uint32_t c = 0;
 
             LY_CHECK_ERR_RET(ly_getutf8(&ctx->in->current, &c, &len),
@@ -4490,7 +4479,6 @@
     (*context)->unres = main_ctx->unres;
     (*context)->pos_type = LY_VLOG_LINE;
     (*context)->in = in;
-    (*context)->line = 1;
 
     mod_p = calloc(1, sizeof *mod_p);
     LY_CHECK_ERR_GOTO(!mod_p, LOGMEM(ly_ctx); ret = LY_EMEM, cleanup);
@@ -4562,7 +4550,6 @@
     (*context)->unres = unres;
     (*context)->pos_type = LY_VLOG_LINE;
     (*context)->in = in;
-    (*context)->line = 1;
 
     mod_p = calloc(1, sizeof *mod_p);
     LY_CHECK_ERR_GOTO(!mod_p, LOGMEM(mod->ctx), cleanup);