| 1 |
greg |
1.1 |
#ifndef lint |
| 2 |
|
|
static const char RCSid[] = "$Id$"; |
| 3 |
|
|
#endif |
| 4 |
|
|
/* |
| 5 |
|
|
* Routines for segment storage and inclusion for meta-files |
| 6 |
|
|
* |
| 7 |
|
|
* 12/18/84 |
| 8 |
|
|
*/ |
| 9 |
|
|
|
| 10 |
|
|
|
| 11 |
|
|
#include "meta.h" |
| 12 |
|
|
|
| 13 |
|
|
|
| 14 |
|
|
#define NODEC 0 /* null declaration (must be 0) */ |
| 15 |
|
|
|
| 16 |
|
|
#define MAXDEC 2048 /* maximum number of declarations */ |
| 17 |
|
|
|
| 18 |
|
|
#define NHASH 101 /* hash size (prime) */ |
| 19 |
|
|
|
| 20 |
|
|
|
| 21 |
|
|
static struct declaration { |
| 22 |
|
|
char *sname; /* segment name */ |
| 23 |
|
|
PLIST sprims; /* segment primitives */ |
| 24 |
|
|
int context; /* declaration containing us */ |
| 25 |
|
|
int nexthash; /* next in hash list */ |
| 26 |
|
|
} dectabl[MAXDEC]; |
| 27 |
|
|
|
| 28 |
|
|
static int hashtabl[NHASH]; |
| 29 |
|
|
|
| 30 |
|
|
static int dectop = 0; /* top of declaration table */ |
| 31 |
|
|
|
| 32 |
|
|
static int curdec = NODEC; /* current declaration */ |
| 33 |
|
|
|
| 34 |
|
|
|
| 35 |
|
|
|
| 36 |
|
|
|
| 37 |
|
|
|
| 38 |
|
|
static int |
| 39 |
|
|
hash(s) /* hash a string */ |
| 40 |
|
|
|
| 41 |
|
|
register char *s; |
| 42 |
|
|
|
| 43 |
|
|
{ |
| 44 |
|
|
register int hval = 0; |
| 45 |
|
|
|
| 46 |
|
|
while (*s) |
| 47 |
|
|
hval += *s++; |
| 48 |
|
|
|
| 49 |
|
|
return(hval % NHASH); |
| 50 |
|
|
} |
| 51 |
|
|
|
| 52 |
|
|
|
| 53 |
|
|
|
| 54 |
|
|
|
| 55 |
|
|
|
| 56 |
|
|
static int |
| 57 |
|
|
lookup(name) /* find name in declaration table */ |
| 58 |
|
|
|
| 59 |
|
|
register char *name; |
| 60 |
|
|
|
| 61 |
|
|
{ |
| 62 |
|
|
register int curd; |
| 63 |
|
|
|
| 64 |
|
|
if (name == NULL) |
| 65 |
|
|
error(USER, "illegal null segment name in lookup"); |
| 66 |
|
|
|
| 67 |
|
|
for (curd = hashtabl[hash(name)]; curd != NODEC; curd = dectabl[curd].nexthash) |
| 68 |
|
|
if (strcmp(name, dectabl[curd].sname) == 0) |
| 69 |
|
|
break; |
| 70 |
|
|
|
| 71 |
|
|
return(curd); |
| 72 |
|
|
} |
| 73 |
|
|
|
| 74 |
|
|
|
| 75 |
|
|
|
| 76 |
|
|
|
| 77 |
|
|
inseg() /* return TRUE if currently in a segment */ |
| 78 |
|
|
|
| 79 |
|
|
{ |
| 80 |
|
|
|
| 81 |
|
|
return(curdec != NODEC); |
| 82 |
|
|
} |
| 83 |
|
|
|
| 84 |
|
|
|
| 85 |
|
|
|
| 86 |
|
|
|
| 87 |
|
|
openseg(name) /* open a new segment */ |
| 88 |
|
|
|
| 89 |
|
|
char *name; |
| 90 |
|
|
|
| 91 |
|
|
{ |
| 92 |
|
|
register int olddec; |
| 93 |
|
|
|
| 94 |
|
|
if ((olddec = lookup(name)) != NODEC && |
| 95 |
|
|
dectabl[olddec].context == curdec) /* redefined segment */ |
| 96 |
|
|
plfree(&dectabl[olddec].sprims); |
| 97 |
|
|
|
| 98 |
|
|
if (++dectop >= MAXDEC) |
| 99 |
|
|
error(SYSTEM, "too many segments in openseg"); |
| 100 |
|
|
|
| 101 |
|
|
dectabl[dectop].sname = savestr(name); |
| 102 |
|
|
/* save previous context */ |
| 103 |
|
|
dectabl[dectop].context = curdec; |
| 104 |
|
|
curdec = dectop; |
| 105 |
|
|
|
| 106 |
|
|
} |
| 107 |
|
|
|
| 108 |
|
|
|
| 109 |
|
|
|
| 110 |
|
|
|
| 111 |
|
|
|
| 112 |
|
|
segprim(p) /* store primitive in current segment */ |
| 113 |
|
|
|
| 114 |
|
|
register PRIMITIVE *p; |
| 115 |
|
|
|
| 116 |
|
|
{ |
| 117 |
|
|
register PRIMITIVE *newp; |
| 118 |
|
|
|
| 119 |
|
|
if (!inseg()) |
| 120 |
|
|
error(SYSTEM, "illegal call to segprim"); |
| 121 |
|
|
|
| 122 |
|
|
switch (p->com) { |
| 123 |
|
|
|
| 124 |
|
|
case POPEN: |
| 125 |
|
|
openseg(p->args); |
| 126 |
|
|
break; |
| 127 |
|
|
|
| 128 |
|
|
case PSEG: |
| 129 |
|
|
segment(p, segprim); |
| 130 |
|
|
break; |
| 131 |
|
|
|
| 132 |
|
|
case PCLOSE: |
| 133 |
|
|
closeseg(); |
| 134 |
|
|
break; |
| 135 |
|
|
|
| 136 |
|
|
default: |
| 137 |
|
|
if ((newp = palloc()) == NULL) |
| 138 |
|
|
error(SYSTEM, "memory limit exceeded in segprim"); |
| 139 |
|
|
mcopy((char *)newp, (char *)p, sizeof(PRIMITIVE)); |
| 140 |
|
|
newp->args = savestr(p->args); |
| 141 |
|
|
add(newp, &dectabl[curdec].sprims); |
| 142 |
|
|
break; |
| 143 |
|
|
} |
| 144 |
|
|
|
| 145 |
|
|
} |
| 146 |
|
|
|
| 147 |
|
|
|
| 148 |
|
|
|
| 149 |
|
|
closeseg() /* close the current segment */ |
| 150 |
|
|
|
| 151 |
|
|
{ |
| 152 |
|
|
register int i; |
| 153 |
|
|
|
| 154 |
|
|
if (!inseg()) |
| 155 |
|
|
error(SYSTEM, "illegal call to closeseg"); |
| 156 |
|
|
|
| 157 |
|
|
/* undefine internal declarations */ |
| 158 |
|
|
for (i = dectop; i > curdec; i--) { |
| 159 |
|
|
hashtabl[hash(dectabl[i].sname)] = dectabl[i].nexthash; |
| 160 |
|
|
freestr(dectabl[i].sname); |
| 161 |
|
|
plfree(&dectabl[i].sprims); |
| 162 |
|
|
} |
| 163 |
|
|
dectop = curdec; |
| 164 |
|
|
/* define this declaration */ |
| 165 |
|
|
i = hash(dectabl[curdec].sname); |
| 166 |
|
|
dectabl[curdec].nexthash = hashtabl[i]; |
| 167 |
|
|
hashtabl[i] = curdec; |
| 168 |
|
|
/* return context */ |
| 169 |
|
|
curdec = dectabl[curdec].context; |
| 170 |
|
|
|
| 171 |
|
|
} |
| 172 |
|
|
|
| 173 |
|
|
|
| 174 |
|
|
|
| 175 |
|
|
|
| 176 |
|
|
segment(p, funcp) /* expand segment p */ |
| 177 |
|
|
PRIMITIVE *p; |
| 178 |
|
|
int (*funcp)(); |
| 179 |
|
|
|
| 180 |
|
|
{ |
| 181 |
|
|
int decln; |
| 182 |
|
|
PRIMITIVE curp; |
| 183 |
|
|
register PRIMITIVE *sp; |
| 184 |
|
|
|
| 185 |
|
|
if ((decln = lookup(p->args)) == NODEC) { |
| 186 |
|
|
sprintf(errmsg, "reference to undefined segment \"%s\" in segment", |
| 187 |
|
|
p->args); |
| 188 |
|
|
error(USER, errmsg); |
| 189 |
|
|
} |
| 190 |
|
|
|
| 191 |
|
|
for (sp = dectabl[decln].sprims.ptop; sp != NULL; sp = sp->pnext) |
| 192 |
|
|
|
| 193 |
|
|
if (isglob(sp->com)) |
| 194 |
|
|
|
| 195 |
|
|
(*funcp)(sp); |
| 196 |
|
|
|
| 197 |
|
|
else { |
| 198 |
|
|
|
| 199 |
|
|
switch (curp.com = sp->com) { |
| 200 |
|
|
|
| 201 |
|
|
case PSEG: |
| 202 |
|
|
case PVSTR: |
| 203 |
|
|
case PTFILL: |
| 204 |
|
|
case PPFILL: |
| 205 |
|
|
curp.arg0 = (sp->arg0 & 0100) | |
| 206 |
|
|
(((sp->arg0 & 060) + p->arg0) & 060); |
| 207 |
|
|
break; |
| 208 |
|
|
|
| 209 |
|
|
case PLSEG: |
| 210 |
|
|
if (p->arg0 & 020) |
| 211 |
|
|
curp.arg0 = (~sp->arg0 & 0100) | (sp->arg0 & 060); |
| 212 |
|
|
else |
| 213 |
|
|
curp.arg0 = sp->arg0 & 0160; |
| 214 |
|
|
break; |
| 215 |
|
|
|
| 216 |
|
|
default: |
| 217 |
|
|
curp.arg0 = sp->arg0 & 0160; |
| 218 |
|
|
break; |
| 219 |
|
|
} |
| 220 |
|
|
if (p->arg0 & 014) |
| 221 |
|
|
curp.arg0 |= p->arg0 & 014; |
| 222 |
|
|
else |
| 223 |
|
|
curp.arg0 |= sp->arg0 & 014; |
| 224 |
|
|
if (p->arg0 & 03) |
| 225 |
|
|
curp.arg0 |= p->arg0 & 03; |
| 226 |
|
|
else |
| 227 |
|
|
curp.arg0 |= sp->arg0 & 03; |
| 228 |
|
|
|
| 229 |
|
|
curp.xy[XMN] = xlate(XMN, sp, p); |
| 230 |
|
|
curp.xy[YMN] = xlate(YMN, sp, p); |
| 231 |
|
|
curp.xy[XMX] = xlate(XMX, sp, p); |
| 232 |
|
|
curp.xy[YMX] = xlate(YMX, sp, p); |
| 233 |
|
|
curp.args = sp->args; |
| 234 |
|
|
|
| 235 |
|
|
(*funcp)(&curp); |
| 236 |
|
|
} |
| 237 |
|
|
|
| 238 |
|
|
} |
| 239 |
|
|
|
| 240 |
|
|
|
| 241 |
|
|
|
| 242 |
|
|
|
| 243 |
|
|
|
| 244 |
|
|
int |
| 245 |
|
|
xlate(extrema, p, px) /* return extrema from p through px */ |
| 246 |
|
|
|
| 247 |
|
|
short extrema; |
| 248 |
|
|
PRIMITIVE *p; |
| 249 |
|
|
register PRIMITIVE *px; |
| 250 |
|
|
|
| 251 |
|
|
{ |
| 252 |
|
|
short oldex; |
| 253 |
|
|
int val; |
| 254 |
|
|
|
| 255 |
|
|
if (((oldex = (extrema + 4 - ((px->arg0 >> 4) & 03))%4) ^ extrema) & 02) |
| 256 |
|
|
val = (XYSIZE-1) - p->xy[oldex]; |
| 257 |
|
|
else |
| 258 |
|
|
val = p->xy[oldex]; |
| 259 |
|
|
|
| 260 |
|
|
if (extrema & 01) |
| 261 |
|
|
return(CONV(val, px->xy[YMX] - px->xy[YMN]) + px->xy[YMN]); |
| 262 |
|
|
else |
| 263 |
|
|
return(CONV(val, px->xy[XMX] - px->xy[XMN]) + px->xy[XMN]); |
| 264 |
|
|
} |
