From bcd64245d23efced00f766662b4f7d80e01f6d75 Mon Sep 17 00:00:00 2001
From: tth <tth@fubar.tetalab.org>
Date: Tue, 18 May 2021 17:14:00 +0200
Subject: [PATCH] working on the .OBJ parser

---
 bubulles.h       |  2 +-
 importobj.c      | 95 +++++++++++++++++++++++++++++++++++++++++-------
 tools/read_obj.c |  2 +-
 3 files changed, 83 insertions(+), 16 deletions(-)

diff --git a/bubulles.h b/bubulles.h
index 95c5a4d..7a1ba48 100644
--- a/bubulles.h
+++ b/bubulles.h
@@ -4,7 +4,7 @@
 
 /* --------------------------------------------------------------------- */
 
-#define LIBBB_VERSION		55
+#define LIBBB_VERSION		56
 
 #define SZ_BUBULLE_TEXT		51		/* arbitrary value */
 
diff --git a/importobj.c b/importobj.c
index 8ff5dcc..8912b7b 100644
--- a/importobj.c
+++ b/importobj.c
@@ -15,13 +15,66 @@ extern int		verbosity;
 /* --------------------------------------------------------------------- */
 
 #define LINE_SZ 666
+/* --------------------------------------------------------------------- */
 
+typedef struct	{
+	char		*token;
+	int		id;
+	} Tokens;
+
+enum token_id { T_comment=1, T_vertice };
+
+Tokens TokenList[] = {
+	{  "#",		T_comment	},
+	{  "v",		T_vertice	},
+	{  NULL,	0		}
+	};
+
+static int type_of_the_line(char *text)
+{
+Tokens		*token;
+int		id;
+
+#if DEBUG_LEVEL
+fprintf(stderr, "%s is searching '%s'\n", __func__, text);
+#endif
+
+for (token=TokenList; token->token; token++) {
+	// fprintf(stderr, "   %5s   ->  %d\n", token->token, token->id);
+	if (!strcmp(token->token, text)) {
+		return token->id;
+		}
+	}
+
+return -1;
+}
+/* --------------------------------------------------------------------- */
+static int parse_vertice(char *cptr, float *px, float *py, float *pz)
+{
+float		x, y, z;
+int		foo;
+
+foo = 0;
+cptr = strtok(NULL, " ");
+foo += sscanf(cptr, "%f", &x);
+cptr = strtok(NULL, " ");
+foo += sscanf(cptr, "%f", &y);
+cptr = strtok(NULL, " ");
+foo += sscanf(cptr, "%f", &z);
+
+if (3 == foo) {
+	*px = x;	*py = y;	*pz = z;
+	}
+
+return foo;
+}
+/* --------------------------------------------------------------------- */
 int try_to_read_an_OBJ_file(char *fname, int notused)
 {
 FILE		*fpin;
 char		line[LINE_SZ+1], *cptr;
 float		x, y, z;
-int		foo, nbre;
+int		foo, nbre, tokenid;
 BBList          *bublist;
 Bubulle         bubulle;
 
@@ -44,24 +97,38 @@ print_bublist_desc(bublist, 0);
 nbre = 0;
 while(NULL!=(cptr=fgets(line, LINE_SZ, fpin))) {
 
-	if (verbosity>1) fputs(line, stderr);
+	if ('\n' != line[strlen(line)-1]) {
+		fprintf(stderr, "%s: short read, exiting...\n", __func__);
+		return -2;
+		}
+	line[strlen(line)-1] = '\0';		/* kill the newline */
+	if (verbosity>1) fprintf(stderr, "line read ===%s===\n", line);
 
 	cptr = strtok(line, " ");
-	if (strcmp(cptr, "v"))	continue;
-
-	cptr = strtok(NULL, " ");
-	foo = sscanf(cptr, "%f", &x);
-	cptr = strtok(NULL, " ");
-	foo = sscanf(cptr, "%f", &y);
-	cptr = strtok(NULL, " ");
-	foo = sscanf(cptr, "%f", &z);
+	if (NULL == cptr) {
+		fprintf(stderr, "no token ?\n");
+		continue;
+		}
+	tokenid = type_of_the_line(cptr);
+	fprintf(stderr, "tok '%s' --> %d\n", cptr, tokenid);
 
 	memset(&bubulle, 0, sizeof(Bubulle));
 
-	bubulle.p.x = x;
-	bubulle.p.y = y;
-	bubulle.p.z = z;
-	if (verbosity > 1) niceprint_bubulle(&bubulle, 0);
+	switch (tokenid) {
+		case T_comment:
+			/* do nothing */
+			break;
+		case T_vertice:
+			foo = parse_vertice(cptr, &x, &y, &z);
+			bubulle.p.x = x;
+			bubulle.p.y = y;
+			bubulle.p.z = z;
+			if (verbosity > 1) niceprint_bubulle(&bubulle, 0);
+			break;
+		default:
+
+			continue;		/* wtf ? */
+		}
 
 	foo = push_bubulle(bublist, &bubulle);
 	if (foo) {
diff --git a/tools/read_obj.c b/tools/read_obj.c
index a7744fa..cd645af 100644
--- a/tools/read_obj.c
+++ b/tools/read_obj.c
@@ -18,7 +18,7 @@ if (2 != argc) {
 	exit(0);
 	}
 
-verbosity = 1;
+verbosity = 2;
 
 foo = try_to_read_an_OBJ_file(argv[1], 0);
 fprintf(stderr, "try to read -> %d\n", foo);