Annotation of gforth/main.c, revision 1.16
1.1 anton 1: /*
1.16 ! pazsan 2: $Id: main.c,v 1.15 1994/10/24 19:16:02 anton Exp $
1.1 anton 3: Copyright 1993 by the ANSI figForth Development Group
4: */
5:
6: #include <ctype.h>
7: #include <stdio.h>
8: #include <string.h>
9: #include <math.h>
10: #include <sys/types.h>
11: #include <sys/stat.h>
12: #include <fcntl.h>
13: #include <assert.h>
14: #include <stdlib.h>
15: #include "forth.h"
1.5 pazsan 16: #include "io.h"
1.12 pazsan 17: #ifdef USE_GETOPT
18: # include "getopt.h"
19: #else
1.16 ! pazsan 20: extern int getopt (int , char * const [], const char *);
1.12 pazsan 21:
1.16 ! pazsan 22: extern char *optarg;
! 23: extern int optind, opterr;
1.12 pazsan 24: #endif
1.2 pazsan 25:
1.10 anton 26: #ifndef DEFAULTPATH
1.16 ! pazsan 27: # define DEFAULTPATH "/usr/local/lib/gforth:."
1.10 anton 28: #endif
29:
1.1 anton 30: #ifdef DIRECT_THREADED
1.16 ! pazsan 31: # define CA(n) (symbols[(n)])
1.1 anton 32: #else
1.16 ! pazsan 33: # define CA(n) ((int)(symbols+(n)))
1.1 anton 34: #endif
35:
1.10 anton 36: #define maxaligned(n) ((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
37:
38: static int dictsize=0;
39: static int dsize=0;
40: static int rsize=0;
41: static int fsize=0;
42: static int lsize=0;
43: char *progname;
44:
45:
1.1 anton 46: /* image file format:
47: * size of image with stacks without tags (in bytes)
48: * size of image without stacks and tags (in bytes)
1.5 pazsan 49: * size of data and FP stack (in bytes)
1.1 anton 50: * pointer to start of code
1.7 anton 51: * pointer into throw (for signal handling)
1.16 ! pazsan 52: * pointer to dictionary
1.1 anton 53: * data (size in image[1])
54: * tags (1 bit/data cell)
55: *
56: * tag==1 mean that the corresponding word is an address;
57: * If the word is >=0, the address is within the image;
58: * addresses within the image are given relative to the start of the image.
59: * If the word is =-1, the address is NIL,
1.2 pazsan 60: * If the word is between -2 and -5, it's a CFA (:, Create, Constant, User)
61: * If the word is -6, it's a DOES> CFA
62: * If the word is -7, it's a DOES JUMP
63: * If the word is <-7, it's a primitive
1.1 anton 64: */
65:
1.10 anton 66: void relocate(Cell *image, char *bitstring, int size, Label symbols[])
1.1 anton 67: {
1.16 ! pazsan 68: int i=0, j, k, steps=(size/sizeof(Cell))/8;
! 69: char bits;
1.5 pazsan 70: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
71:
1.16 ! pazsan 72: for(k=0; k<=steps; k++)
! 73: for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1)
! 74: if(bits & 0x80)
! 75: if(image[i]<0)
! 76: switch(image[i])
! 77: {
! 78: case CF_NIL : image[i]=0; break;
! 79: case CF(DOCOL) :
! 80: case CF(DOVAR) :
! 81: case CF(DOCON) :
! 82: case CF(DOUSER) :
! 83: case CF(DODEFER) : MAKE_CF(image+i,symbols[CF(image[i])]); break;
! 84: case CF(DODOES) : MAKE_DOES_CF(image+i,image[i+1]+((int)image));
! 85: break;
! 86: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
! 87: default : image[i]=(Cell)CA(CF(image[i]));
! 88: }
! 89: else
! 90: image[i]+=(Cell)image;
1.1 anton 91: }
92:
1.10 anton 93: Cell *loader(FILE *imagefile)
94: {
1.16 ! pazsan 95: Cell header[3];
! 96: Cell *image;
! 97: int wholesize;
! 98: int imagesize; /* everything needed by the image */
! 99:
! 100: fread(header,1,3*sizeof(Cell),imagefile);
! 101: if (dictsize==0)
! 102: dictsize = header[0];
! 103: if (dsize==0)
! 104: dsize=header[2];
! 105: if (rsize==0)
! 106: rsize=header[2];
! 107: if (fsize==0)
! 108: fsize=header[2];
! 109: if (lsize==0)
! 110: lsize=header[2];
! 111: dictsize=maxaligned(dictsize);
! 112: dsize=maxaligned(dsize);
! 113: rsize=maxaligned(rsize);
! 114: lsize=maxaligned(lsize);
! 115: fsize=maxaligned(fsize);
! 116:
! 117: wholesize = dictsize+dsize+rsize+fsize+lsize;
! 118: imagesize = header[1]+((header[1]-1)/sizeof(Cell))/8+1;
! 119: image=malloc(wholesize>imagesize?wholesize:imagesize);
! 120: memset(image,0,wholesize); /* why? - anton */
! 121: image[0]=header[0];
! 122: image[1]=header[1];
! 123: image[2]=header[2];
! 124:
! 125: fread(image+3,1,header[1]-3*sizeof(Cell),imagefile);
! 126: fread(((void *)image)+header[1],1,((header[1]-1)/sizeof(Cell))/8+1,
! 127: imagefile);
! 128: fclose(imagefile);
! 129:
! 130: if(image[5]==0) {
! 131: relocate(image,(char *)image+header[1],header[1],engine(0,0,0,0,0));
! 132: }
! 133: else if(image[5]!=(Cell)image) {
! 134: fprintf(stderr,"Corrupted image address, please recompile image\n");
! 135: exit(1);
! 136: }
1.1 anton 137:
1.16 ! pazsan 138: CACHE_FLUSH(image,image[1]);
! 139:
! 140: return(image);
1.1 anton 141: }
142:
1.10 anton 143: int go_forth(Cell *image, int stack, Cell *entries)
1.1 anton 144: {
1.15 anton 145: Cell *sp=(Cell*)((void *)image+dictsize+dsize);
146: Address lp=(Address)((void *)sp+lsize);
147: Float *fp=(Float *)((void *)lp+fsize);
148: Cell *rp=(Cell*)((void *)fp+rsize);
149: Xt *ip=(Xt *)(image[3]);
150: int throw_code;
151:
152: for(;stack>0;stack--)
153: *--sp=entries[stack-1];
154:
155: install_signal_handlers(); /* right place? */
156:
157: if ((throw_code=setjmp(throw_jmp_buf))) {
158: static Cell signal_data_stack[8];
159: static Cell signal_return_stack[8];
160: static Float signal_fp_stack[1];
161:
162: signal_data_stack[7]=throw_code;
163:
164: return((int)engine((Xt *)image[4],signal_data_stack+7,
165: signal_return_stack+8,signal_fp_stack,0));
166: }
167:
168: return((int)engine(ip,sp,rp,fp,lp));
1.1 anton 169: }
170:
1.10 anton 171: int convsize(char *s, int elemsize)
172: /* converts s of the format #+u (e.g. 25k) into the number of bytes.
173: the unit u can be one of bekM, where e stands for the element
174: size. default is e */
175: {
176: char *endp;
177: int n,m;
178:
179: m = elemsize;
180: n = strtoul(s,&endp,0);
181: if (endp!=NULL) {
182: if (strcmp(endp,"b")==0)
183: m=1;
184: else if (strcmp(endp,"k")==0)
185: m=1024;
186: else if (strcmp(endp,"M")==0)
187: m=1024*1024;
188: else if (strcmp(endp,"e")!=0) {
189: fprintf(stderr,"%s: cannot grok size specification %s\n", progname, s);
190: exit(1);
191: }
192: }
193: return n*m;
194: }
195:
1.1 anton 196: int main(int argc, char **argv, char **env)
197: {
1.16 ! pazsan 198: char *path, *path1;
! 199: char *imagename="gforth.fi";
! 200: FILE *image_file;
! 201: int c, retvalue;
1.10 anton 202:
1.14 anton 203: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
1.6 anton 204: /* turn on alignment checks on the 486.
205: * on the 386 this should have no effect. */
206: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
207: #endif
1.2 pazsan 208:
1.16 ! pazsan 209: progname = argv[0];
! 210: if ((path=getenv("GFORTHPATH"))==NULL)
! 211: path = strcpy(malloc(strlen(DEFAULTPATH)+1),DEFAULTPATH);
! 212: opterr=0;
! 213: while (1) {
! 214: int option_index=0;
1.12 pazsan 215: #ifdef USE_GETOPT
1.16 ! pazsan 216: static struct option opts[] = {
! 217: {"image-file", required_argument, NULL, 'i'},
! 218: {"dictionary-size", required_argument, NULL, 'm'},
! 219: {"data-stack-size", required_argument, NULL, 'd'},
! 220: {"return-stack-size", required_argument, NULL, 'r'},
! 221: {"fp-stack-size", required_argument, NULL, 'f'},
! 222: {"locals-stack-size", required_argument, NULL, 'l'},
! 223: {"path", required_argument, NULL, 'p'},
! 224: {0,0,0,0}
! 225: /* no-init-file, no-rc? */
! 226: };
1.10 anton 227:
1.16 ! pazsan 228: c = getopt_long(argc, argv, "i:m:d:r:f:l:p:", opts, &option_index);
1.12 pazsan 229: #else
1.16 ! pazsan 230: c = getopt(argc, argv, "i:m:d:r:f:l:p:");
1.12 pazsan 231: #endif
232:
1.16 ! pazsan 233: if (c==EOF)
! 234: break;
! 235: if (c=='?') {
! 236: optind--;
! 237: break;
! 238: }
! 239: switch (c) {
! 240: case 'i': imagename = optarg; break;
! 241: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
! 242: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
! 243: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
! 244: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
! 245: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
! 246: case 'p': path = optarg; break;
! 247: }
! 248: }
! 249: path1=path;
! 250: do {
! 251: char *pend=strchr(path, ':');
! 252: if (pend==NULL)
! 253: pend=path+strlen(path);
! 254: if (strlen(path)==0) {
! 255: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
! 256: progname, imagename, path1);
! 257: exit(1);
! 258: }
! 259: {
! 260: int dirlen=pend-path;
! 261: char fullfilename[dirlen+strlen(imagename)+2];
! 262: memcpy(fullfilename, path, dirlen);
! 263: if (fullfilename[dirlen-1]!='/')
! 264: fullfilename[dirlen++]='/';
! 265: strcpy(fullfilename+dirlen,imagename);
! 266: image_file=fopen(fullfilename,"rb");
! 267: }
! 268: path=pend+(*pend==':');
! 269: } while (image_file==NULL);
! 270:
! 271: {
! 272: Cell environ[]= {
! 273: (Cell)argc-(optind-1),
! 274: (Cell)(argv+(optind-1)),
! 275: (Cell)path1};
! 276: argv[optind-1] = progname;
! 277: /*
! 278: for (i=0; i<environ[0]; i++)
! 279: printf("%s\n", ((char **)(environ[1]))[i]);
! 280: */
! 281: retvalue=go_forth(loader(image_file),3,environ);
! 282: deprep_terminal();
! 283: exit(retvalue);
! 284: }
1.1 anton 285: }
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