| 1 |
greg |
1.1 |
#ifndef lint |
| 2 |
schorsch |
2.8 |
static const char RCSid[] = "$Id: lamps.c,v 2.7 2003/02/25 02:47:21 greg Exp $"; |
| 3 |
greg |
1.1 |
#endif |
| 4 |
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/* |
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* Load lamp data. |
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*/ |
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| 8 |
greg |
2.7 |
#include "copyright.h" |
| 9 |
greg |
2.6 |
|
| 10 |
greg |
1.1 |
#include <stdio.h> |
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greg |
2.6 |
#include <stdlib.h> |
| 12 |
greg |
1.1 |
#include <ctype.h> |
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schorsch |
2.8 |
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| 14 |
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#include "standard.h" |
| 15 |
greg |
2.5 |
#include "color.h" |
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greg |
1.1 |
|
| 17 |
greg |
2.6 |
extern char *eindex(), *expsave(); |
| 18 |
greg |
2.4 |
extern FILE *frlibopen(); |
| 19 |
greg |
1.1 |
|
| 20 |
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typedef struct lamp { |
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char *pattern; /* search pattern */ |
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float *color; /* pointer to lamp value */ |
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struct lamp *next; /* next lamp in list */ |
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} LAMP; /* a lamp entry */ |
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| 26 |
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static LAMP *lamps = NULL; /* lamp list */ |
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float * |
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matchlamp(s) /* see if string matches any lamp */ |
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char *s; |
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{ |
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register LAMP *lp; |
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| 35 |
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for (lp = lamps; lp != NULL; lp = lp->next) { |
| 36 |
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expset(lp->pattern); |
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if (eindex(s) != NULL) |
| 38 |
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return(lp->color); |
| 39 |
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} |
| 40 |
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return(NULL); |
| 41 |
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} |
| 42 |
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| 43 |
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| 44 |
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loadlamps(file) /* load lamp type file */ |
| 45 |
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char *file; |
| 46 |
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{ |
| 47 |
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LAMP *lastp; |
| 48 |
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register LAMP *lp; |
| 49 |
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FILE *fp; |
| 50 |
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float xyz[3]; |
| 51 |
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char buf[128], str[128]; |
| 52 |
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register char *cp1, *cp2; |
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greg |
2.4 |
if ((fp = frlibopen(file)) == NULL) |
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greg |
1.1 |
return(0); |
| 56 |
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lastp = NULL; |
| 57 |
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while (fgets(buf, sizeof(buf), fp) != NULL) { |
| 58 |
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/* work on a copy of buffer */ |
| 59 |
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strcpy(str, buf); |
| 60 |
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/* get pattern for this entry */ |
| 61 |
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for (cp1 = str; isspace(*cp1); cp1++) |
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; |
| 63 |
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if (!*cp1 || *cp1 == '#') |
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continue; |
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for (cp2 = cp1+1; *cp2; cp2++) |
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if (*cp2 == *cp1 && cp2[-1] != '\\') |
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break; |
| 68 |
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if (!*cp2) { |
| 69 |
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cp1 = "unclosed pattern"; |
| 70 |
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goto fmterr; |
| 71 |
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} |
| 72 |
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cp1++; *cp2++ = '\0'; |
| 73 |
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if (ecompile(cp1, 1, 0) < 0) { |
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cp1 = "bad regular expression"; |
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goto fmterr; |
| 76 |
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} |
| 77 |
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if ((lp = (LAMP *)malloc(sizeof(LAMP))) == NULL) |
| 78 |
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goto memerr; |
| 79 |
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if ((lp->pattern = expsave()) == NULL) |
| 80 |
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goto memerr; |
| 81 |
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/* get specification */ |
| 82 |
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for (cp1 = cp2; isspace(*cp1); cp1++) |
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; |
| 84 |
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if (!isdigit(*cp1) && *cp1 != '.' && *cp1 != '(') { |
| 85 |
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cp1 = "missing lamp specification"; |
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goto fmterr; |
| 87 |
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} |
| 88 |
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if (*cp1 == '(') { /* find alias */ |
| 89 |
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for (cp2 = ++cp1; *cp2; cp2++) |
| 90 |
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if (*cp2 == ')' && cp2[-1] != '\\') |
| 91 |
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break; |
| 92 |
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*cp2 = '\0'; |
| 93 |
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if ((lp->color = matchlamp(cp1)) == NULL) { |
| 94 |
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cp1 = "unmatched alias"; |
| 95 |
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goto fmterr; |
| 96 |
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} |
| 97 |
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} else { /* or read specificaion */ |
| 98 |
greg |
2.3 |
if ((lp->color=(float *)malloc(6*sizeof(float)))==NULL) |
| 99 |
greg |
1.1 |
goto memerr; |
| 100 |
greg |
2.3 |
if (sscanf(cp1, "%f %f %f", &lp->color[3], & |
| 101 |
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lp->color[4], &lp->color[5]) != 3) { |
| 102 |
greg |
1.1 |
cp1 = "bad lamp data"; |
| 103 |
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goto fmterr; |
| 104 |
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} |
| 105 |
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/* convert xyY to XYZ */ |
| 106 |
greg |
2.3 |
xyz[1] = lp->color[5]; |
| 107 |
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xyz[0] = lp->color[3]/lp->color[4] * xyz[1]; |
| 108 |
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xyz[2] = xyz[1]*(1./lp->color[4] - 1.) - xyz[0]; |
| 109 |
greg |
1.1 |
/* XYZ to RGB */ |
| 110 |
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cie_rgb(lp->color, xyz); |
| 111 |
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} |
| 112 |
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if (lastp == NULL) |
| 113 |
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lamps = lp; |
| 114 |
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else |
| 115 |
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lastp->next = lp; |
| 116 |
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lp->next = NULL; |
| 117 |
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lastp = lp; |
| 118 |
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} |
| 119 |
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fclose(fp); |
| 120 |
greg |
1.3 |
return(lastp != NULL); |
| 121 |
greg |
1.1 |
memerr: |
| 122 |
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fputs("Out of memory in loadlamps\n", stderr); |
| 123 |
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return(-1); |
| 124 |
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fmterr: |
| 125 |
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fputs(buf, stderr); |
| 126 |
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fprintf(stderr, "%s: %s\n", file, cp1); |
| 127 |
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return(-1); |
| 128 |
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} |
| 129 |
greg |
1.2 |
|
| 130 |
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| 131 |
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freelamps() /* free our lamps list */ |
| 132 |
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{ |
| 133 |
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register LAMP *lp1, *lp2; |
| 134 |
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| 135 |
greg |
2.2 |
for (lp1 = lamps; lp1 != NULL; lp1 = lp2) { |
| 136 |
greg |
1.2 |
free(lp1->pattern); |
| 137 |
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if (lp1->color != NULL) { |
| 138 |
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for (lp2 = lp1->next; lp2 != NULL; lp2 = lp2->next) |
| 139 |
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if (lp2->color == lp1->color) |
| 140 |
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lp2->color = NULL; |
| 141 |
greg |
2.6 |
free((void *)lp1->color); |
| 142 |
greg |
1.2 |
} |
| 143 |
greg |
2.2 |
lp2 = lp1->next; |
| 144 |
greg |
2.6 |
free((void *)lp1); |
| 145 |
greg |
1.2 |
} |
| 146 |
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lamps = NULL; |
| 147 |
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} |
