diff options
Diffstat (limited to 'service/src/stlfile.c')
| -rw-r--r-- | service/src/stlfile.c | 61 |
1 files changed, 57 insertions, 4 deletions
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); |