From 809b99f53ccefad6435eeb15ae210284fd2889ec Mon Sep 17 00:00:00 2001
From: Andrea Shepard <andrea@persephoneslair.org>
Date: Tue, 23 May 2017 18:28:22 +0000
Subject: [PATCH] name/description support for GLR backend
---
src/backends/glr.c | 70 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 69 insertions(+), 1 deletion(-)
diff --git a/src/backends/glr.c b/src/backends/glr.c
index a88090a3..3abe6f55 100644
--- a/src/backends/glr.c
+++ b/src/backends/glr.c
@@ -239,15 +239,83 @@ HParseResult *h_glr_parse(HAllocator* mm__, const HParser* parser, HInputStream*
return result;
}
+char * h_glr_get_description(HAllocator *mm__,
+ HParserBackend be, void *param) {
+ const char *format_str = "GLR(%zu) parser backend";
+ /* TODO fix the backend */
+ const char *generic_descr_format_str =
+ "GLR(k) parser backend (actually using the param is broken)";
+ uintptr_t params_int;
+ size_t k, len;
+ char *descr = NULL;
+
+ params_int = (uintptr_t)param;
+ if (params_int > 0) {
+ /* A specific k was given */
+ k = (size_t)params_int;
+ /* Measure how big a buffer we need */
+ len = snprintf(NULL, 0, format_str, k);
+ /* Allocate it and do the real snprintf */
+ descr = h_new(char, len + 1);
+ if (descr) {
+ snprintf(descr, len + 1, format_str, k);
+ }
+ } else {
+ /*
+ * No specific k; TODO actually have a default and fix the backend
+ */
+ len = snprintf(NULL, 0, generic_descr_format_str);
+ /* Allocate and do the real snprintf */
+ descr = h_new(char, len + 1);
+ if (descr) {
+ snprintf(descr, len + 1, generic_descr_format_str);
+ }
+ }
+
+ return descr;
+}
+char * h_glr_get_short_name(HAllocator *mm__,
+ HParserBackend be, void *param) {
+ const char *format_str = "GLR(%zu)", *generic_name = "GLR(k)";
+ uintptr_t params_int;
+ size_t k, len;
+ char *name = NULL;
+
+ params_int = (uintptr_t)param;
+ if (params_int > 0) {
+ /* A specific k was given */
+ k = (size_t)params_int;
+ /* Measure how big a buffer we need */
+ len = snprintf(NULL, 0, format_str, k);
+ /* Allocate it and do the real snprintf */
+ name = h_new(char, len + 1);
+ if (name) {
+ snprintf(name, len + 1, format_str, k);
+ }
+ } else {
+ /* No specific k */
+ len = strlen(generic_name);
+ name = h_new(char, len + 1);
+ strncpy(name, generic_name, len + 1);
+ }
+
+ return name;
+}
HParserBackendVTable h__glr_backend_vtable = {
.compile = h_glr_compile,
.parse = h_glr_parse,
.free = h_glr_free,
- .copy_params = h_copy_numeric_param
+ .copy_params = h_copy_numeric_param,
/* No free_param needed, since it's not actually allocated */
+
+ /* Name/param resolution functions */
+ .backend_short_name = "glr",
+ .backend_description = "GLR(k) parser backend",
+ .get_description_with_params = h_glr_get_description,
+ .get_short_name_with_params = h_glr_get_short_name
};
--
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