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view lwcc/parse_c.y @ 556:928c033c0cd0
Allow MOD directive to accept only the standard base header parameters
There are cases where only the standard OS9 module header fields are to be
provided. This could be, for instance, in the case of a nonstandard user
type module. So allow the execution offset and data size fields to be
omitted entirely and handle the module length correctly as well.
author | William Astle <lost@l-w.ca> |
---|---|
date | Fri, 08 Sep 2023 00:32:40 -0600 |
parents | a3e277c58df9 |
children |
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line source
%include { #include <assert.h> // only needed due to a bug in lemon #include <stdio.h> #include "parse.h" #include "tree.h" } %token_type { struct tokendata * } %token_prefix PTOK_ %token_destructor { tokendata_free($$); } %default_type { node_t * } %extra_argument { struct parserinfo *pinfo } program(A) ::= rprogram(B). { A = B; pinfo -> parsetree = A; } rprogram(A) ::= rprogram(C) globaldecl(B). { A = C; node_addchild(A, B); } rprogram(A) ::= . { A = node_create(NODE_PROGRAM); } globaldecl(A) ::= vardecl(B). { A = B; } globaldecl(A) ::= fundecl(B). { A = B; } vardecl(A) ::= datatype(B) ident(C) ENDS. { A = node_create(NODE_DECL, B, C); } ident(A) ::= IDENTIFIER(B). { A = node_create(NODE_IDENT, B -> strval); } datatype(A) ::= typename(B). { A = B; } datatype(A) ::= datatype(B) STAR. { A = node_create(NODE_TYPE_PTR, B); } typename(A) ::= KW_VOID. { A = node_create(NODE_TYPE_VOID); } typename(A) ::= KW_FLOAT. { A = node_create(NODE_TYPE_FLOAT); } typename(A) ::= KW_DOUBLE. { A = node_create(NODE_TYPE_DOUBLE); } typename(A) ::= KW_LONG KW_DOUBLE. { A = node_create(NODE_TYPE_LDOUBLE); } typename(A) ::= baseint(B). { A = B; } typename(A) ::= KW_UNSIGNED. { A = node_create(NODE_TYPE_UINT); } typename(A) ::= KW_SIGNED. { A = node_create(NODE_TYPE_INT); } typename(A) ::= KW_SIGNED baseint(B). { A = B; if (A -> type == NODE_TYPE_CHAR) A -> type = NODE_TYPE_SCHAR; } typename(A) ::= KW_UNSIGNED baseint(B). { A = B; switch (A -> type) { case NODE_TYPE_CHAR: A -> type = NODE_TYPE_UCHAR; break; case NODE_TYPE_SHORT: A -> type = NODE_TYPE_USHORT; break; case NODE_TYPE_INT: A -> type = NODE_TYPE_UINT; break; case NODE_TYPE_LONG: A -> type = NODE_TYPE_ULONG; break; case NODE_TYPE_LONGLONG: A -> type = NODE_TYPE_ULONGLONG; break; } } baseint(A) ::= KW_INT. { A = node_create(NODE_TYPE_INT); } baseint(A) ::= KW_LONG. { A = node_create(NODE_TYPE_LONG); } baseint(A) ::= KW_LONG KW_INT. { A = node_create(NODE_TYPE_LONG); } baseint(A) ::= KW_LONG KW_LONG. { A = node_create(NODE_TYPE_LONGLONG); } baseint(A) ::= KW_SHORT. { A = node_create(NODE_TYPE_SHORT); } baseint(A) ::= KW_LONG KW_LONG KW_INT. { A = node_create(NODE_TYPE_LONGLONG); } baseint(A) ::= KW_SHORT KW_INT. { A = node_create(NODE_TYPE_SHORT); } baseint(A) ::= KW_CHAR. { A = node_create(NODE_TYPE_CHAR); } fundecl(A) ::= datatype(B) ident(C) arglist(D) statementblock(E). { A = node_create(NODE_FUNDEF, B, C, D, E); } fundecl(A) ::= datatype(B) ident(C) arglist(D) ENDS. { A = node_create(NODE_FUNDECL, B, C, D); } arglist(A) ::= OPAREN CPAREN. { A = node_create(NODE_FUNARGS); } statementblock(A) ::= OBRACE CBRACE. { A = node_create(NODE_BLOCK); } %parse_failure { fprintf(stderr, "Parse error\n"); } %stack_overflow { fprintf(stderr, "Parser stack overflow\n"); } %syntax_error { fprintf(stderr, "Undexpected token %d: ", TOKEN -> tokid); tokendata_print(stderr, TOKEN); }