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/* Copyright (c) 1995 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Parse an MGF file, converting or discarding unsupported entities |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <math.h> |
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#include <ctype.h> |
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#include <string.h> |
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int (*mg_ehand[MG_NENTITIES])(); |
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/* Handler routine for unknown entities */ |
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|
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int (*mg_uhand)() = mg_defuhand; |
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|
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unsigned mg_nunknown; /* count of unknown entities */ |
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|
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/* error messages */ |
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char *mg_err[MG_NERRS] = MG_ERRLIST; |
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#define e_ies e_any_toss |
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/* alternate handler routines */ |
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|
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static int e_any_toss(), /* discard unneeded entity */ |
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e_ies(), /* IES luminaire file */ |
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e_include(), /* include file */ |
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e_sph(), /* sphere */ |
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e_cct(), /* color temperature */ |
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e_cmix(), /* color mixtures */ |
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e_cspec(), /* color spectra */ |
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e_cyl(), /* cylinder */ |
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e_cone(), /* cone */ |
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e_prism(), /* prism */ |
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e_ring(), /* ring */ |
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e_torus(); /* torus */ |
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static void make_axes(FVECT u, FVECT v, FVECT w); |
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static int put_cxy(void); |
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static int put_cspec(void); |
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static int e_any_toss(int ac, char **av); /* discard an unwanted entity */ |
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static int e_cspec(int ac, char **av); /* handle spectral color */ |
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static int e_cmix(int ac, char **av); /* handle mixing of colors */ |
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static int e_cct(int ac, char **av); /* handle color temperature */ |
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|
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|
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/* alternate handler support functions */ |
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static int (*e_supp[MG_NENTITIES])(); |
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static int (*e_supp[MG_NENTITIES])(int ac, char **av); |
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static char FLTFMT[] = "%.12g"; |
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void |
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mg_init() /* initialize alternate entity handlers */ |
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mg_init(void) /* initialize alternate entity handlers */ |
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{ |
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unsigned long ineed = 0, uneed = 0; |
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register int i; |
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ineed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX; |
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} else |
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
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if (mg_ehand[MG_E_FACE] == NULL) |
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mg_ehand[MG_E_FACE] = mg_ehand[MG_E_FACEH]; |
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else if (mg_ehand[MG_E_FACEH] == NULL) |
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mg_ehand[MG_E_FACEH] = e_faceh; |
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if (mg_ehand[MG_E_COLOR] != NULL) { |
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if (mg_ehand[MG_E_CMIX] == NULL) { |
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mg_ehand[MG_E_CMIX] = e_cmix; |
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int |
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mg_entity(name) /* get entity number from its name */ |
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char *name; |
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mg_entity( /* get entity number from its name */ |
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char *name |
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) |
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{ |
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static LUTAB ent_tab = LU_SINIT(NULL,NULL); /* lookup table */ |
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register char *cp; |
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int |
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mg_handle(en, ac, av) /* pass entity to appropriate handler */ |
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register int en; |
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int ac; |
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char **av; |
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mg_handle( /* pass entity to appropriate handler */ |
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register int en, |
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int ac, |
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char **av |
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) |
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{ |
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int rv; |
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if (en < 0 && (en = mg_entity(av[0])) < 0) |
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if (en < 0 && (en = mg_entity(av[0])) < 0) { /* unknown entity */ |
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if (mg_uhand != NULL) |
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return((*mg_uhand)(ac, av)); |
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return(MG_EUNK); |
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if (e_supp[en] != NULL) { |
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} |
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if (e_supp[en] != NULL) { /* support handler */ |
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if ((rv = (*e_supp[en])(ac, av)) != MG_OK) |
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return(rv); |
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} |
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return((*mg_ehand[en])(ac, av)); |
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return((*mg_ehand[en])(ac, av)); /* assigned handler */ |
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} |
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int |
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mg_open(ctx, fn) /* open new input file */ |
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register MG_FCTXT *ctx; |
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char *fn; |
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mg_open( /* open new input file */ |
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register MG_FCTXT *ctx, |
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char *fn |
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) |
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{ |
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static int nfids; |
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register char *cp; |
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return(MG_OK); |
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} |
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/* get name relative to this context */ |
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if (mg_file != NULL && (cp = strrchr(mg_file->fname, '/')) != NULL) { |
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if (fn[0] != '/' && mg_file != NULL && |
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(cp = strrchr(mg_file->fname, '/')) != NULL) { |
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strcpy(ctx->fname, mg_file->fname); |
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strcpy(ctx->fname+(cp-mg_file->fname+1), fn); |
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} else |
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void |
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mg_close() /* close input file */ |
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mg_close(void) /* close input file */ |
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{ |
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register MG_FCTXT *ctx = mg_file; |
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mg_file = ctx->prev; /* restore enclosing context */ |
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if (ctx->fp == stdin) |
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return; /* don't close standard input */ |
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fclose(ctx->fp); |
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if (ctx->fp != stdin) /* close file if it's a file */ |
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fclose(ctx->fp); |
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} |
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void |
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mg_fgetpos(pos) /* get current position in input file */ |
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register MG_FPOS *pos; |
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mg_fgetpos( /* get current position in input file */ |
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register MG_FPOS *pos |
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) |
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{ |
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extern long ftell(); |
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|
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pos->fid = mg_file->fid; |
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pos->lineno = mg_file->lineno; |
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pos->offset = ftell(mg_file->fp); |
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|
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int |
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mg_fgoto(pos) /* reposition input file pointer */ |
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register MG_FPOS *pos; |
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mg_fgoto( /* reposition input file pointer */ |
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register MG_FPOS *pos |
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) |
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{ |
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if (pos->fid != mg_file->fid) |
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return(MG_ESEEK); |
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int |
301 |
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mg_read() /* read next line from file */ |
301 |
> |
mg_read(void) /* read next line from file */ |
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{ |
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register int len = 0; |
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|
306 |
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if (fgets(mg_file->inpline+len, |
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MG_MAXLINE-len, mg_file->fp) == NULL) |
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return(len); |
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mg_file->lineno++; |
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len += strlen(mg_file->inpline+len); |
310 |
< |
if (len > 1 && mg_file->inpline[len-2] == '\\') |
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< |
mg_file->inpline[--len-1] = ' '; |
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< |
} while (mg_file->inpline[len]); |
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> |
if (len >= MG_MAXLINE-1) |
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> |
return(len); |
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> |
mg_file->lineno++; |
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> |
} while (len > 1 && mg_file->inpline[len-2] == '\\'); |
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return(len); |
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} |
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int |
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mg_parse() /* parse current input line */ |
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mg_parse(void) /* parse current input line */ |
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{ |
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char abuf[MG_MAXLINE]; |
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char *argv[MG_MAXARGC]; |
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int en; |
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< |
register char *cp, **ap; |
326 |
< |
|
327 |
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strcpy(cp=abuf, mg_file->inpline); |
328 |
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ap = argv; /* break into words */ |
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> |
register char *cp, *cp2, **ap; |
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> |
/* copy line, removing escape chars */ |
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> |
cp = abuf; cp2 = mg_file->inpline; |
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> |
while ((*cp++ = *cp2++)) |
328 |
> |
if (cp2[0] == '\n' && cp2[-1] == '\\') |
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cp--; |
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> |
cp = abuf; ap = argv; /* break into words */ |
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for ( ; ; ) { |
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while (isspace(*cp)) |
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*cp++ = '\0'; |
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|
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int |
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mg_load(fn) /* load an MGF file */ |
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< |
char *fn; |
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> |
mg_load( /* load an MGF file */ |
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char *fn |
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) |
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{ |
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MG_FCTXT cntxt; |
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int rval; |
357 |
+ |
register int nbr; |
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|
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if ((rval = mg_open(&cntxt, fn)) != MG_OK) { |
360 |
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fprintf(stderr, "%s: %s\n", fn, mg_err[rval]); |
361 |
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return(rval); |
362 |
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} |
363 |
< |
while (mg_read()) /* parse each line */ |
363 |
> |
while ((nbr = mg_read()) > 0) { /* parse each line */ |
364 |
> |
if (nbr >= MG_MAXLINE-1) { |
365 |
> |
fprintf(stderr, "%s: %d: %s\n", cntxt.fname, |
366 |
> |
cntxt.lineno, mg_err[rval=MG_ELINE]); |
367 |
> |
break; |
368 |
> |
} |
369 |
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if ((rval = mg_parse()) != MG_OK) { |
370 |
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fprintf(stderr, "%s: %d: %s:\n%s", cntxt.fname, |
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cntxt.lineno, mg_err[rval], |
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cntxt.inpline); |
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break; |
374 |
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} |
375 |
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} |
376 |
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mg_close(); |
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return(rval); |
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} |
379 |
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|
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|
381 |
+ |
int |
382 |
+ |
mg_defuhand( /* default handler for unknown entities */ |
383 |
+ |
int ac, |
384 |
+ |
char **av |
385 |
+ |
) |
386 |
+ |
{ |
387 |
+ |
if (mg_nunknown++ == 0) /* report first incident */ |
388 |
+ |
fprintf(stderr, "%s: %d: %s: %s\n", mg_file->fname, |
389 |
+ |
mg_file->lineno, mg_err[MG_EUNK], av[0]); |
390 |
+ |
return(MG_OK); |
391 |
+ |
} |
392 |
+ |
|
393 |
+ |
|
394 |
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void |
395 |
< |
mg_clear() /* clear parser history */ |
395 |
> |
mg_clear(void) /* clear parser history */ |
396 |
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{ |
397 |
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c_clearall(); /* clear context tables */ |
398 |
< |
mg_file = NULL; /* reset our context */ |
398 |
> |
while (mg_file != NULL) /* reset our file context */ |
399 |
> |
mg_close(); |
400 |
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} |
401 |
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|
402 |
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|
406 |
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|
407 |
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|
408 |
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static int |
409 |
< |
e_any_toss(ac, av) /* discard an unwanted entity */ |
410 |
< |
int ac; |
411 |
< |
char **av; |
409 |
> |
e_any_toss( /* discard an unwanted entity */ |
410 |
> |
int ac, |
411 |
> |
char **av |
412 |
> |
) |
413 |
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{ |
414 |
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return(MG_OK); |
415 |
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} |
416 |
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|
417 |
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|
418 |
< |
static int |
419 |
< |
e_include(ac, av) /* include file */ |
420 |
< |
int ac; |
421 |
< |
char **av; |
418 |
> |
int |
419 |
> |
e_include( /* include file */ |
420 |
> |
int ac, |
421 |
> |
char **av |
422 |
> |
) |
423 |
|
{ |
424 |
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char *xfarg[MG_MAXARGC]; |
425 |
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MG_FCTXT ictx; |
426 |
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XF_SPEC *xf_orig = xf_context; |
427 |
< |
int rv; |
427 |
> |
register int rv; |
428 |
|
|
429 |
|
if (ac < 2) |
430 |
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return(MG_EARGC); |
437 |
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for (i = 1; i < ac-1; i++) |
438 |
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xfarg[i] = av[i+1]; |
439 |
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xfarg[ac-1] = NULL; |
440 |
< |
if ((rv = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) |
440 |
> |
if ((rv = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) { |
441 |
> |
mg_close(); |
442 |
|
return(rv); |
443 |
+ |
} |
444 |
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} |
445 |
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do { |
446 |
< |
while (mg_read()) |
446 |
> |
while ((rv = mg_read()) > 0) { |
447 |
> |
if (rv >= MG_MAXLINE-1) { |
448 |
> |
fprintf(stderr, "%s: %d: %s\n", ictx.fname, |
449 |
> |
ictx.lineno, mg_err[MG_ELINE]); |
450 |
> |
mg_close(); |
451 |
> |
return(MG_EINCL); |
452 |
> |
} |
453 |
|
if ((rv = mg_parse()) != MG_OK) { |
454 |
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fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname, |
455 |
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ictx.lineno, mg_err[rv], |
457 |
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mg_close(); |
458 |
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return(MG_EINCL); |
459 |
|
} |
460 |
+ |
} |
461 |
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if (ac > 2) |
462 |
< |
if ((rv = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) |
462 |
> |
if ((rv = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) { |
463 |
> |
mg_close(); |
464 |
|
return(rv); |
465 |
+ |
} |
466 |
|
} while (xf_context != xf_orig); |
467 |
|
mg_close(); |
468 |
|
return(MG_OK); |
469 |
|
} |
470 |
|
|
471 |
|
|
472 |
+ |
int |
473 |
+ |
e_faceh( /* replace face+holes with single contour */ |
474 |
+ |
int ac, |
475 |
+ |
char **av |
476 |
+ |
) |
477 |
+ |
{ |
478 |
+ |
char *newav[MG_MAXARGC]; |
479 |
+ |
int lastp = 0; |
480 |
+ |
register int i, j; |
481 |
+ |
|
482 |
+ |
newav[0] = mg_ename[MG_E_FACE]; |
483 |
+ |
for (i = 1; i < ac; i++) |
484 |
+ |
if (av[i][0] == '-') { |
485 |
+ |
if (i < 4) |
486 |
+ |
return(MG_EARGC); |
487 |
+ |
if (i >= ac-1) |
488 |
+ |
break; |
489 |
+ |
if (!lastp) |
490 |
+ |
lastp = i-1; |
491 |
+ |
for (j = i+1; j < ac-1 && av[j+1][0] != '-'; j++) |
492 |
+ |
; |
493 |
+ |
if (j - i < 3) |
494 |
+ |
return(MG_EARGC); |
495 |
+ |
newav[i] = av[j]; /* connect hole loop */ |
496 |
+ |
} else |
497 |
+ |
newav[i] = av[i]; /* hole or perimeter vertex */ |
498 |
+ |
if (lastp) |
499 |
+ |
newav[i++] = av[lastp]; /* finish seam to outside */ |
500 |
+ |
newav[i] = NULL; |
501 |
+ |
return(mg_handle(MG_E_FACE, i, newav)); |
502 |
+ |
} |
503 |
+ |
|
504 |
+ |
|
505 |
|
static void |
506 |
< |
make_axes(u, v, w) /* compute u and v given w (normalized) */ |
507 |
< |
FVECT u, v, w; |
506 |
> |
make_axes( /* compute u and v given w (normalized) */ |
507 |
> |
FVECT u, |
508 |
> |
FVECT v, |
509 |
> |
FVECT w |
510 |
> |
) |
511 |
|
{ |
512 |
|
register int i; |
513 |
|
|
522 |
|
} |
523 |
|
|
524 |
|
|
525 |
< |
static int |
526 |
< |
e_sph(ac, av) /* expand a sphere into cones */ |
527 |
< |
int ac; |
528 |
< |
char **av; |
525 |
> |
int |
526 |
> |
e_sph( /* expand a sphere into cones */ |
527 |
> |
int ac, |
528 |
> |
char **av |
529 |
> |
) |
530 |
|
{ |
531 |
|
static char p2x[24], p2y[24], p2z[24], r1[24], r2[24]; |
532 |
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_sv1","=","_sv2"}; |
575 |
|
} |
576 |
|
|
577 |
|
|
578 |
< |
static int |
579 |
< |
e_torus(ac, av) /* expand a torus into cones */ |
580 |
< |
int ac; |
581 |
< |
char **av; |
578 |
> |
int |
579 |
> |
e_torus( /* expand a torus into cones */ |
580 |
> |
int ac, |
581 |
> |
char **av |
582 |
> |
) |
583 |
|
{ |
584 |
|
static char p2[3][24], r1[24], r2[24]; |
585 |
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_tv1","=","_tv2"}; |
668 |
|
} |
669 |
|
|
670 |
|
|
671 |
< |
static int |
672 |
< |
e_cyl(ac, av) /* replace a cylinder with equivalent cone */ |
673 |
< |
int ac; |
674 |
< |
char **av; |
671 |
> |
int |
672 |
> |
e_cyl( /* replace a cylinder with equivalent cone */ |
673 |
> |
int ac, |
674 |
> |
char **av |
675 |
> |
) |
676 |
|
{ |
677 |
|
static char *avnew[6] = {mg_ename[MG_E_CONE]}; |
678 |
|
|
686 |
|
} |
687 |
|
|
688 |
|
|
689 |
< |
static int |
690 |
< |
e_ring(ac, av) /* turn a ring into polygons */ |
691 |
< |
int ac; |
692 |
< |
char **av; |
689 |
> |
int |
690 |
> |
e_ring( /* turn a ring into polygons */ |
691 |
> |
int ac, |
692 |
> |
char **av |
693 |
> |
) |
694 |
|
{ |
695 |
|
static char p3[3][24], p4[3][24]; |
696 |
|
static char *nzent[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
785 |
|
} |
786 |
|
|
787 |
|
|
788 |
< |
static int |
789 |
< |
e_cone(ac, av) /* turn a cone into polygons */ |
790 |
< |
int ac; |
791 |
< |
char **av; |
788 |
> |
int |
789 |
> |
e_cone( /* turn a cone into polygons */ |
790 |
> |
int ac, |
791 |
> |
char **av |
792 |
> |
) |
793 |
|
{ |
794 |
|
static char p3[3][24], p4[3][24], n3[3][24], n4[3][24]; |
795 |
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_cv1","="}; |
801 |
|
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
802 |
|
static char *n4ent[5] = {mg_ename[MG_E_NORMAL],n4[0],n4[1],n4[2]}; |
803 |
|
static char *fent[6] = {mg_ename[MG_E_FACE],"_cv1","_cv2","_cv3","_cv4"}; |
804 |
+ |
char *v1n; |
805 |
|
register C_VERTEX *cv1, *cv2; |
806 |
|
register int i, j; |
807 |
|
FVECT u, v, w; |
817 |
|
if ((cv1 = c_getvert(av[1])) == NULL || |
818 |
|
(cv2 = c_getvert(av[3])) == NULL) |
819 |
|
return(MG_EUNDEF); |
820 |
+ |
v1n = av[1]; |
821 |
|
if (!isflt(av[2]) || !isflt(av[4])) |
822 |
|
return(MG_ETYPE); |
823 |
|
rad1 = atof(av[2]); |
828 |
|
if (rad2 == 0.) |
829 |
|
return(MG_EILL); |
830 |
|
} else if (rad2 != 0.) { |
831 |
< |
if (rad1 < 0. ^ rad2 < 0.) |
831 |
> |
if ((rad1 < 0.) ^ (rad2 < 0.)) |
832 |
|
return(MG_EILL); |
833 |
|
} else { /* swap */ |
834 |
|
C_VERTEX *cv; |
836 |
|
cv = cv1; |
837 |
|
cv1 = cv2; |
838 |
|
cv2 = cv; |
839 |
+ |
v1n = av[3]; |
840 |
|
d = rad1; |
841 |
|
rad1 = rad2; |
842 |
|
rad2 = d; |
870 |
|
if ((rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
871 |
|
return(rv); |
872 |
|
if (rad1 == 0.) { /* triangles */ |
873 |
< |
v1ent[3] = av[1]; |
873 |
> |
v1ent[3] = v1n; |
874 |
|
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
875 |
|
return(rv); |
876 |
|
for (j = 0; j < 3; j++) |
956 |
|
} |
957 |
|
|
958 |
|
|
959 |
< |
static int |
960 |
< |
e_prism(ac, av) /* turn a prism into polygons */ |
961 |
< |
int ac; |
962 |
< |
char **av; |
959 |
> |
int |
960 |
> |
e_prism( /* turn a prism into polygons */ |
961 |
> |
int ac, |
962 |
> |
char **av |
963 |
> |
) |
964 |
|
{ |
965 |
|
static char p[3][24]; |
966 |
|
static char *vent[5] = {mg_ename[MG_E_VERTEX],NULL,"="}; |
1065 |
|
|
1066 |
|
|
1067 |
|
static int |
1068 |
< |
put_cxy() /* put out current xy chromaticities */ |
1068 |
> |
put_cxy(void) /* put out current xy chromaticities */ |
1069 |
|
{ |
1070 |
|
static char xbuf[24], ybuf[24]; |
1071 |
|
static char *ccom[4] = {mg_ename[MG_E_CXY], xbuf, ybuf}; |
979 |
– |
int rv; |
1072 |
|
|
1073 |
|
sprintf(xbuf, "%.4f", c_ccolor->cx); |
1074 |
|
sprintf(ybuf, "%.4f", c_ccolor->cy); |
1075 |
< |
if ((rv = mg_handle(MG_E_CXY, 3, ccom)) != MG_OK) |
984 |
< |
return(rv); |
985 |
< |
return(MG_OK); |
1075 |
> |
return(mg_handle(MG_E_CXY, 3, ccom)); |
1076 |
|
} |
1077 |
|
|
1078 |
|
|
1079 |
|
static int |
1080 |
< |
put_cspec() /* put out current color spectrum */ |
1080 |
> |
put_cspec(void) /* put out current color spectrum */ |
1081 |
|
{ |
1082 |
|
char wl[2][6], vbuf[C_CNSS][24]; |
1083 |
|
char *newav[C_CNSS+4]; |
1104 |
|
|
1105 |
|
|
1106 |
|
static int |
1107 |
< |
e_cspec(ac, av) /* handle spectral color */ |
1108 |
< |
int ac; |
1109 |
< |
char **av; |
1107 |
> |
e_cspec( /* handle spectral color */ |
1108 |
> |
int ac, |
1109 |
> |
char **av |
1110 |
> |
) |
1111 |
|
{ |
1112 |
|
/* convert to xy chromaticity */ |
1113 |
|
c_ccvt(c_ccolor, C_CSXY); |
1119 |
|
|
1120 |
|
|
1121 |
|
static int |
1122 |
< |
e_cmix(ac, av) /* handle mixing of colors */ |
1123 |
< |
int ac; |
1124 |
< |
char **av; |
1122 |
> |
e_cmix( /* handle mixing of colors */ |
1123 |
> |
int ac, |
1124 |
> |
char **av |
1125 |
> |
) |
1126 |
|
{ |
1127 |
|
/* |
1128 |
|
* Contorted logic works as follows: |
1143 |
|
|
1144 |
|
|
1145 |
|
static int |
1146 |
< |
e_cct(ac, av) /* handle color temperature */ |
1147 |
< |
int ac; |
1148 |
< |
char **av; |
1146 |
> |
e_cct( /* handle color temperature */ |
1147 |
> |
int ac, |
1148 |
> |
char **av |
1149 |
> |
) |
1150 |
|
{ |
1151 |
|
/* |
1152 |
|
* Logic is similar to e_cmix here. Support handler has already |