/* pr_lex.c Lexical parser for GameC Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 2001 Jeff Teunissen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include "qfcc.h" int pr_source_line; char pr_parm_names[MAX_PARMS][MAX_NAME]; char *pr_file_p; char *pr_line_start; // start of current source line int pr_bracelevel; char pr_token[2048]; int pr_token_len; token_type_t pr_token_type; type_t *pr_immediate_type; eval_t pr_immediate; char pr_immediate_string[2048]; int pr_error_count; // simple types. function types are dynamically allocated type_t type_void = { ev_void, &def_void }; type_t type_string = { ev_string, &def_string }; type_t type_float = { ev_float, &def_float }; type_t type_vector = { ev_vector, &def_vector }; type_t type_entity = { ev_entity, &def_entity }; type_t type_field = { ev_field, &def_field }; // type_function is a void() function used for state defs type_t type_function = { ev_func, &def_function, NULL, &type_void }; type_t type_pointer = { ev_pointer, &def_pointer }; type_t type_quaternion = { ev_quaternion, &def_quaternion }; type_t type_integer = { ev_integer, &def_integer }; type_t type_floatfield = { ev_field, &def_field, NULL, &type_float }; int type_size[ev_type_count] = { 1, 1, 1, 3, 1, 1, 1, 1, 4, 1 }; def_t def_void = { &type_void, "temp" }; def_t def_string = { &type_string, "temp" }; def_t def_float = { &type_float, "temp" }; def_t def_vector = { &type_vector, "temp" }; def_t def_entity = { &type_entity, "temp" }; def_t def_field = { &type_field, "temp" }; def_t def_function = { &type_function, "temp" }; def_t def_pointer = { &type_pointer, "temp" }; def_t def_quaternion = { &type_quaternion, "temp"}; def_t def_integer = { &type_integer, "temp"}; def_t def_ret, def_parms[MAX_PARMS]; def_t *def_for_type[8] = { &def_void, &def_string, &def_float, &def_vector, &def_entity, &def_field, &def_function, &def_pointer }; /* PR_LexString Parse a quoted string */ void PR_LexString (void) { int c; int i; int mask; int boldnext; pr_token_len = 0; mask = 0x00; boldnext = 0; pr_file_p++; do { c = *pr_file_p++; if (!c) error (0, "EOF inside quote"); if (c == '\n') error (0, "newline inside quote"); if (c == '\\') { // escape char c = *pr_file_p++; if (!c) error (0, "EOF inside quote"); switch (c) { case 'n': c = '\n'; break; case '"': c = '\"'; break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': for (i = c = 0; i < 3 && *pr_file_p >= '0' && *pr_file_p <='7'; i++, pr_file_p++) { c *= 8; c += *pr_file_p - '0'; } if (!*pr_file_p) error (0, "EOF inside quote"); break; case 'x': c = 0; while (*pr_file_p && isxdigit (*pr_file_p)) { c *= 16; if (*pr_file_p <= '9') c += *pr_file_p - '0'; else if (*pr_file_p <= 'F') c += *pr_file_p - 'A' + 10; else c += *pr_file_p - 'a' + 10; pr_file_p++; } if (!*pr_file_p) error (0, "EOF inside quote"); break; case 'a': c = '\a'; break; case 'b': c = '\b'; break; case 'e': c = '\033'; break; case 'f': c = '\f'; break; case 'r': c = '\r'; break; case 't': c = '\t'; break; case 'v': c = '\v'; break; case '^': if (*pr_file_p == '\"') error (0, "Unexpected end of string after \\^"); boldnext = 1; continue; case '<': mask = 0x80; continue; case '>': mask = 0x00; continue; default: error (0, "Unknown escape char"); break; } } else if (c == '\"') { pr_token[pr_token_len] = 0; pr_token_type = tt_immediate; pr_immediate_type = &type_string; strcpy (pr_immediate_string, pr_token); return; } if (boldnext) c = c ^ 0x80; boldnext = 0; c = c ^ mask; pr_token[pr_token_len] = c; pr_token_len++; } while (1); } void PR_PrintType (type_t *type) { int i; if (!type) { printf("(null)"); return; } switch (type->type) { case ev_void: printf ("void"); break; case ev_string: printf ("string"); break; case ev_float: printf ("float"); break; case ev_vector: printf ("vector"); break; case ev_entity: printf ("entity"); break; case ev_field: printf ("."); PR_PrintType (type->aux_type); break; case ev_func: PR_PrintType (type->aux_type); printf ("("); for (i = 0; i < type->num_parms; i++) { PR_PrintType (type->parm_types[i]); if (i < type->num_parms - 1) printf (","); } if (type->num_parms == -1) printf ("..."); printf (")"); break; case ev_pointer: printf ("pointer to "); PR_PrintType (type->aux_type); break; default: printf ("unknown type %d", type->type); break; } } /* PR_FindType Returns a preexisting complex type that matches the parm, or allocates a new one and copies it out. */ type_t * PR_FindType (type_t *type) { def_t *def; type_t *check; int i; for (check = pr.types; check; check = check->next) { if (check->type != type->type || check->aux_type != type->aux_type || check->num_parms != type->num_parms) continue; if (check->type != ev_func) return check; if (check->num_parms == -1) return check; for (i = 0; i < type->num_parms; i++) if (check->parm_types[i] != type->parm_types[i]) break; if (i == type->num_parms) return check; } // allocate a new one check = malloc (sizeof (*check)); if (!check) Sys_Error ("PR_FindType: Memory Allocation Failure\n"); *check = *type; check->next = pr.types; pr.types = check; // allocate a generic def for the type, so fields can reference it def = malloc (sizeof (def_t)); if (!check) Sys_Error ("PR_FindType: Memory Allocation Failure\n"); def->name = "COMPLEX TYPE"; def->type = check; check->def = def; return check; }