X-Git-Url: https://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fnative%2Fnative-parser.y;fp=discover%2Fnative%2Fnative-parser.y;h=bafcf49ba02c0fa85222c3e753446b39d700bee7;hp=0000000000000000000000000000000000000000;hb=646d77d8156ad72da1c24f734a029a525ba4bed9;hpb=638f16c7683db165154bbe53772c4b864f9dc90d

diff --git a/discover/native/native-parser.y b/discover/native/native-parser.y
new file mode 100644
index 0000000..bafcf49
--- /dev/null
+++ b/discover/native/native-parser.y
@@ -0,0 +1,200 @@
+
+%pure-parser
+%lex-param { nscan_t scanner }
+%parse-param { struct native_parser *parser }
+%parse-param { void *scanner }
+%error-verbose
+
+%define api.prefix {n}
+%{
+#include <talloc/talloc.h>
+#include <log/log.h>
+#include "discover/resource.h"
+#include "discover/parser-utils.h"
+
+#include "native.h"
+
+void yyerror(struct native_parser *parser, void *scanner, const char *fmt, ...);
+%}
+
+%union {
+	char	*word;
+	int	num;
+}
+
+%token	<word>	TOKEN_WORD
+%token	<num>	TOKEN_NUMBER
+%token	<num>	TOKEN_DELIM
+
+%token TOKEN_DEFAULT
+%token TOKEN_DEV_DESCRIPTION
+
+%token TOKEN_NAME
+%token TOKEN_IMAGE
+%token TOKEN_INITRD
+%token TOKEN_ARGS
+%token TOKEN_DTB
+%token TOKEN_DESCRIPTION
+%token TOKEN_NEWLINE
+
+%{
+#include "native-lexer.h"
+%}
+
+%%
+
+native:
+      globals boot_options { native_parser_finish(parser); }
+      | boot_options { native_parser_finish(parser); }
+      ;
+
+globals: globals global
+       | global
+       ;
+
+global: TOKEN_DEFAULT delims TOKEN_WORD {
+		if (parser->default_name)
+			pb_log_fn("Duplicate default option, ignoring\n");
+		else
+			parser->default_name = talloc_strdup(parser, $3);
+	}
+	| TOKEN_DEV_DESCRIPTION delims TOKEN_WORD {
+		native_append_string(parser,
+			&parser->ctx->device->device->description, $3);
+	}
+	;
+
+boot_options:
+	    boot_options option
+	    | option
+	    ;
+
+option: name params
+     ;
+
+name: TOKEN_NAME delims TOKEN_WORD {
+		native_parser_create_option(parser, $3);
+	}
+	;
+
+params: params param
+      | param
+      ;
+
+param: TOKEN_IMAGE delims TOKEN_WORD {
+		native_set_resource(parser, &parser->opt->boot_image, $3);
+	}
+	| TOKEN_INITRD delims TOKEN_WORD {
+		native_set_resource(parser, &parser->opt->initrd, $3);
+	}
+	| TOKEN_DTB delims TOKEN_WORD  {
+		native_set_resource(parser, &parser->opt->dtb, $3);
+	}
+	| TOKEN_ARGS delims TOKEN_WORD {
+		native_append_string(parser, &parser->opt->option->boot_args, $3);
+	}
+	| TOKEN_DESCRIPTION delims TOKEN_WORD  {
+		native_append_string(parser, &parser->opt->option->description, $3);
+	}
+	;
+
+delims: delims TOKEN_DELIM
+      | TOKEN_DELIM
+      ;
+
+%%
+
+void yyerror(struct native_parser *parser, void *scanner, const char *fmt, ...)
+{
+	const char *str;
+	va_list ap;
+
+	va_start(ap, fmt);
+	str = talloc_vasprintf(parser, fmt, ap);
+	va_end(ap);
+
+	pb_log("parse error: %d('%s'): %s\n", nget_lineno(scanner),
+					nget_text(scanner), str);
+}
+
+void native_parser_finish(struct native_parser *parser)
+{
+	if (parser->opt) {
+		discover_context_add_boot_option(parser->ctx, parser->opt);
+		parser->opt = NULL;
+	}
+}
+
+void native_set_resource(struct native_parser *parser,
+		struct resource ** resource, const char *path)
+{
+	if (*resource) {
+		pb_log_fn("Duplicate resource at line %d: %s\n",
+			nget_lineno(parser->scanner), path);
+		return;
+	}
+
+	*resource = create_devpath_resource(parser->opt, parser->opt->device,
+					path);
+}
+
+void native_append_string(struct native_parser *parser,
+		char **str, const char *append)
+{
+	if (*str)
+		*str = talloc_asprintf_append(*str, "%s", append);
+	else
+		*str = talloc_strdup(parser->opt, append);
+}
+
+void native_parser_create_option(struct native_parser *parser, const char *name)
+{
+	struct discover_boot_option *opt = parser->opt;
+
+	if (opt)
+		native_parser_finish(parser);
+
+	opt = discover_boot_option_create(parser->ctx, parser->ctx->device);
+	opt->option->name = talloc_strdup(opt, name);
+	opt->option->id = talloc_asprintf(opt, "%s@%p",
+			parser->ctx->device->device->id, opt);
+	opt->option->type = DISCOVER_BOOT_OPTION;
+	opt->option->is_default = parser->default_name &&
+				streq(parser->default_name, name);
+	parser->opt = opt;
+	return;
+}
+
+struct native_parser *native_parser_create(struct discover_context *ctx)
+{
+	struct native_parser *parser;
+
+	parser = talloc_zero(ctx, struct native_parser);
+	parser->ctx = ctx;
+	nlex_init_extra(parser, &parser->scanner);
+
+	return parser;
+}
+
+void native_parser_parse(struct native_parser *parser, const char *filename,
+	char *buf, int len)
+{
+	YY_BUFFER_STATE bufstate;
+	int rc;
+
+	if (!len)
+		return;
+
+	parser->filename = filename;
+
+	bufstate = n_scan_bytes(buf, len - 1, parser->scanner);
+	nset_lineno(1, parser->scanner);
+
+	rc = nparse(parser, parser->scanner);
+
+	if (rc)
+		pb_log("Failed to parse %s\n", filename);
+
+	n_delete_buffer(bufstate, parser->scanner);
+}
+