scanner: share code in XkbParse{File,String}

Some refactoring to prepare for changes in the parse() function.

Signed-off-by: Ran Benita <ran234@gmail.com>

src/xkbcomp/include.c

@@ -291,7 +291,8 @@ ProcessIncludeFile(struct xkb_context *ctx,
     if (!file)
         return false;
 
-    if (!XkbParseFile(ctx, file, stmt->file, &rtrn)) {
+    rtrn = XkbParseFile(ctx, file, stmt->file);
+    if (!rtrn) {
         log_err(ctx, "Error interpreting include file \"%s\"\n", stmt->file);
         fclose(file);
         return false;

src/xkbcomp/scanner.l

@@ -245,76 +245,86 @@ CheckDefaultMap(struct xkb_context *ctx, XkbFile *maps, const char *fileName)
     }
 }
 
-bool
-XkbParseString(struct xkb_context *ctx, const char *string,
-               const char *file_name, XkbFile **out)
+static XkbFile *
+parse(struct xkb_context *ctx, yyscan_t scanner)
 {
-    int ret;
     struct parser_param param;
+
+    param.scanner = scanner;
+    param.ctx = ctx;
+
+    if (_xkbcommon_parse(&param) != 0)
+        return NULL;
+
+    CheckDefaultMap(param.ctx, param.rtrn, yyget_extra(scanner)->scanFile);
+    return param.rtrn;
+}
+
+static bool
+init_scanner(yyscan_t *scanner, struct scanner_extra *extra,
+             struct xkb_context *ctx, const char *file_name)
+{
+    memset(extra, 0, sizeof(*extra));
+
+    if (yylex_init_extra(extra, scanner) != 0)
+        return false;
+
+    extra->ctx = ctx;
+
+    extra->scanFile = strdup(file_name);
+    if (!extra->scanFile)
+        return false;
+
+    return true;
+}
+
+static void
+clear_scanner(yyscan_t scanner, struct scanner_extra *extra)
+{
+    free(extra->scanFile);
+    yylex_destroy(scanner);
+}
+
+XkbFile *
+XkbParseString(struct xkb_context *ctx, const char *string,
+               const char *file_name)
+{
+    yyscan_t scanner;
     struct scanner_extra extra;
     YY_BUFFER_STATE state;
+    XkbFile *xkb_file;
 
-    if (string == NULL)
-        return false;
+    if (!init_scanner(&scanner, &extra, ctx, file_name))
+        return NULL;
 
-    param.ctx = ctx;
+    state = yy_scan_string(string, scanner);
 
-    memset(&extra, 0, sizeof(extra));
-    ret = yylex_init_extra(&extra, &param.scanner);
-    if (ret != 0)
-        return false;
+    xkb_file = parse(ctx, scanner);
 
-    extra.ctx = ctx;
+    yy_delete_buffer(state, scanner);
+    clear_scanner(scanner, &extra);
 
-    extra.scanFile = strdup(file_name);
-    if (!extra.scanFile)
-        return false;
-
-    state = yy_scan_string(string, param.scanner);
-    ret = _xkbcommon_parse(&param);
-    yy_delete_buffer(state, param.scanner);
-    _xkbcommon_lex_destroy(param.scanner);
-    free(extra.scanFile);
-    if (ret != 0)
-        return false;
-
-    CheckDefaultMap(param.ctx, param.rtrn, file_name);
-    *out = param.rtrn;
-    return true;
+    return xkb_file;
 }
 
-bool
-XkbParseFile(struct xkb_context *ctx, FILE *file,
-             const char *file_name, XkbFile **out)
+XkbFile *
+XkbParseFile(struct xkb_context *ctx, FILE *file, const char *file_name)
 {
-    int ret;
-    struct parser_param param;
+    yyscan_t scanner;
     struct scanner_extra extra;
+    YY_BUFFER_STATE state;
+    XkbFile *xkb_file;
 
-    if (!file)
-        return false;
+    if (!init_scanner(&scanner, &extra, ctx, file_name))
+        return NULL;
 
-    param.ctx = ctx;
+    state = yy_create_buffer(file, YY_BUF_SIZE, scanner);
+    yy_switch_to_buffer(state, scanner);
 
-    memset(&extra, 0, sizeof(extra));
-    ret = yylex_init_extra(&extra, &param.scanner);
-    if (ret != 0)
-        return false;
+    xkb_file = parse(ctx, scanner);
 
-    extra.ctx = ctx;
+    yy_delete_buffer(state, scanner);
+    clear_scanner(scanner, &extra);
 
-    extra.scanFile = strdup(file_name);
-    if (!extra.scanFile)
-        return false;
-
-    _xkbcommon_set_in(file, param.scanner);
-    ret = _xkbcommon_parse(&param);
-    _xkbcommon_lex_destroy(param.scanner);
-    free(extra.scanFile);
-    if (ret != 0)
-        return false;
-
-    CheckDefaultMap(param.ctx, param.rtrn, file_name);
-    *out = param.rtrn;
-    return true;
+    return xkb_file;
 }

src/xkbcomp/xkbcomp-priv.h

@@ -37,13 +37,12 @@ struct xkb_component_names {
     char *symbols;
 };
 
-bool
-XkbParseFile(struct xkb_context *ctx, FILE *file, const char *file_name,
-             XkbFile **out);
+XkbFile *
+XkbParseFile(struct xkb_context *ctx, FILE *file, const char *file_name);
 
-bool
-XkbParseString(struct xkb_context *context, const char *string,
-               const char *file_name, XkbFile **out);
+XkbFile *
+XkbParseString(struct xkb_context *ctx, const char *string,
+               const char *file_name);
 
 void
 FreeXkbFile(XkbFile *file);

src/xkbcomp/xkbcomp.c

@@ -124,7 +124,6 @@ xkb_keymap_new_from_string(struct xkb_context *ctx,
                            enum xkb_keymap_format format,
                            enum xkb_keymap_compile_flags flags)
 {
-    bool ok;
     XkbFile *file;
     struct xkb_keymap *keymap;
 
@@ -138,8 +137,8 @@ xkb_keymap_new_from_string(struct xkb_context *ctx,
         return NULL;
     }
 
-    ok = XkbParseString(ctx, string, "input", &file);
-    if (!ok) {
+    file = XkbParseString(ctx, string, "input");
+    if (!file) {
         log_err(ctx, "Failed to parse input xkb file\n");
         return NULL;
     }
@@ -155,7 +154,6 @@ xkb_keymap_new_from_file(struct xkb_context *ctx,
                          enum xkb_keymap_format format,
                          enum xkb_keymap_compile_flags flags)
 {
-    bool ok;
     XkbFile *xkb_file;
     struct xkb_keymap *keymap;
 
@@ -169,8 +167,8 @@ xkb_keymap_new_from_file(struct xkb_context *ctx,
         return NULL;
     }
 
-    ok = XkbParseFile(ctx, file, "(unknown file)", &xkb_file);
-    if (!ok) {
+    xkb_file = XkbParseFile(ctx, file, "(unknown file)");
+    if (!xkb_file) {
         log_err(ctx, "Failed to parse input xkb file\n");
         return NULL;
     }