From 80b190c66dab551b75db790df86efaffe0f86671 Mon Sep 17 00:00:00 2001
From: Louis Burda <quent.burda@gmail.com>
Date: Thu, 29 Apr 2021 18:37:03 +0200
Subject: fixed Makefile and extended ascii parsing structure

---
 service/src/stlfile.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 57 insertions(+), 4 deletions(-)

(limited to 'service/src/stlfile.c')

diff --git a/service/src/stlfile.c b/service/src/stlfile.c
index 3ae1441..d57964b 100644
--- a/service/src/stlfile.c
+++ b/service/src/stlfile.c
@@ -38,10 +38,30 @@ stack_free(struct stack *stack)
 }
 
 int
-consume_keyword(char **bp, char *end)
+consume_keyword(char **start, char *end)
 {
-	/* TODO */
-	return KW_SOLID_BEGIN;
+	static const struct {
+		int code;
+		const char *str;
+	} mapping[] = {
+		{ KW_SOLID_BEGIN, "solid" },
+		{ KW_SOLID_END, "endsolid" },
+		{ KW_LOOP_BEGIN, "outer loop" },
+		{ KW_LOOP_END, "endloop" },
+		{ KW_FACET_BEGIN, "facet normal" },
+		{ KW_FACET_END, "endfacet" },
+		{ KW_VERTEX, "vertex" },
+	};
+	char *bp;
+	int i;
+
+	for (bp = *start; strchr(" \r\n\t", *bp); bp++);
+
+	for (i = 0; i < ARRSIZE(mapping); i++)
+		if (!strcmp(mapping[i].str, bp))
+			return mapping[i].code;
+
+	return KW_UNKNOWN;
 }
 
 int
@@ -53,11 +73,44 @@ parse_file_ascii(struct parseinfo *info, char *buf, size_t len)
 
 	stack_init(&states);
 
+#define PARSER_ASSERT_NESTING(x, y)                              \
+	do { if ((x) != (y)) {                                       \
+		fprintf(stderr, "STL Format error: invalid nesting!");   \
+		return FAIL;                                             \
+	} } while (0)
+
 	info = checkp(malloc(sizeof(struct parseinfo)));
 	info->type = TYPE_ASCII;
 
 	while ((kw = consume_keyword(&bp, end))) {
-		/* TODO */
+		switch (kw) {
+		case KW_SOLID_BEGIN:
+			stack_push(&states, STATE_SOLID);
+			break;
+		case KW_SOLID_END:
+			if (stack_pop(&states) == STATE_SOLID)
+				break;
+			goto unknown;
+		case KW_LOOP_BEGIN:
+			stack_push(&states, STATE_LOOP);
+			break;
+		case KW_LOOP_END:
+			if (stack_pop(&states) == STATE_LOOP)
+				break;
+			goto unknown;
+		case KW_FACET_BEGIN:
+			stack_push(&states, STATE_FACET);
+			break;
+		case KW_FACET_END:
+			if (stack_pop(&states) == STATE_FACET)
+				break;
+			goto unknown;
+
+unknown:
+		case KW_UNKNOWN:
+			fprintf(stderr, "Encountered unexpected keyword: '%.*s..'", 30, bp);
+			return FAIL;
+		}
 	}
 
 	stack_free(&states);
-- 
cgit v1.2.3-71-gd317