Annotation of gforth/main.c, revision 1.10
1.1 anton 1: /*
1.10 ! anton 2: $Id: main.c,v 1.9 1994/08/25 15:25:30 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"
1.10 ! anton 17: #include "getopt.h"
1.1 anton 18:
1.2 pazsan 19: #ifndef DEFAULTBIN
20: # define DEFAULTBIN ""
21: #endif
22:
1.10 ! anton 23: #ifndef DEFAULTPATH
! 24: # define DEFAULTPATH "/usr/local/lib/gforth:."
! 25: #endif
! 26:
1.1 anton 27: #ifdef DIRECT_THREADED
1.2 pazsan 28: # define CA(n) (symbols[(n)])
1.1 anton 29: #else
1.2 pazsan 30: # define CA(n) ((int)(symbols+(n)))
1.1 anton 31: #endif
32:
1.10 ! anton 33: #define maxaligned(n) ((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
! 34:
! 35: static int dictsize=0;
! 36: static int dsize=0;
! 37: static int rsize=0;
! 38: static int fsize=0;
! 39: static int lsize=0;
! 40: char *progname;
! 41:
! 42:
1.1 anton 43: /* image file format:
44: * size of image with stacks without tags (in bytes)
45: * size of image without stacks and tags (in bytes)
1.5 pazsan 46: * size of data and FP stack (in bytes)
1.1 anton 47: * pointer to start of code
1.7 anton 48: * pointer into throw (for signal handling)
1.1 anton 49: * data (size in image[1])
50: * tags (1 bit/data cell)
51: *
52: * tag==1 mean that the corresponding word is an address;
53: * If the word is >=0, the address is within the image;
54: * addresses within the image are given relative to the start of the image.
55: * If the word is =-1, the address is NIL,
1.2 pazsan 56: * If the word is between -2 and -5, it's a CFA (:, Create, Constant, User)
57: * If the word is -6, it's a DOES> CFA
58: * If the word is -7, it's a DOES JUMP
59: * If the word is <-7, it's a primitive
1.1 anton 60: */
61:
1.10 ! anton 62: void relocate(Cell *image, char *bitstring, int size, Label symbols[])
1.1 anton 63: {
1.5 pazsan 64: int i=0, j, k, steps=(size/sizeof(Cell))/8;
65: char bits;
66: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
67:
68: for(k=0; k<=steps; k++)
69: for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1)
70: if(bits & 0x80)
71: if(image[i]<0)
72: switch(image[i])
73: {
74: case CF_NIL : image[i]=0; break;
75: case CF(DOCOL) :
76: case CF(DOVAR) :
77: case CF(DOCON) :
1.9 anton 78: case CF(DOUSER) :
79: case CF(DODEFER) :
80: MAKE_CF(image+i,symbols[CF(image[i])]); break;
1.5 pazsan 81: case CF(DODOES) : MAKE_DOES_CF(image+i,image[i+1]+((int)image));
82: break;
83: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
84: default : image[i]=(Cell)CA(CF(image[i]));
85: }
86: else
87: image[i]+=(Cell)image;
1.2 pazsan 88:
1.5 pazsan 89: CACHE_FLUSH(image,size);
1.1 anton 90: }
91:
1.10 ! anton 92: Cell *loader(FILE *imagefile)
! 93: {
! 94: Cell header[3];
! 95: Cell *image;
! 96: int wholesize;
! 97: int imagesize; /* everything needed by the image */
! 98:
! 99: fread(header,1,3*sizeof(Cell),imagefile);
! 100: if (dictsize==0)
! 101: dictsize = header[0];
! 102: if (dsize==0)
! 103: dsize=header[2];
! 104: if (rsize==0)
! 105: rsize=header[2];
! 106: if (fsize==0)
! 107: fsize=header[2];
! 108: if (lsize==0)
! 109: lsize=header[2];
! 110: dictsize=maxaligned(dictsize);
! 111: dsize=maxaligned(dsize);
! 112: rsize=maxaligned(rsize);
! 113: lsize=maxaligned(lsize);
! 114: fsize=maxaligned(fsize);
! 115:
! 116: wholesize = dictsize+dsize+rsize+fsize+lsize;
! 117: imagesize = header[1]+((header[1]-1)/sizeof(Cell))/8+1;
! 118: image=malloc(wholesize>imagesize?wholesize:imagesize);
! 119: memset(image,0,wholesize); /* why? - anton */
1.1 anton 120: image[0]=header[0];
121: image[1]=header[1];
1.10 ! anton 122: image[2]=header[2];
1.1 anton 123:
1.10 ! anton 124: fread(image+3,1,header[1]-3*sizeof(Cell),imagefile);
! 125: fread(((void *)image)+header[1],1,((header[1]-1)/sizeof(Cell))/8+1,
1.1 anton 126: imagefile);
127: fclose(imagefile);
128:
1.10 ! anton 129: relocate(image,(char *)image+header[1],header[1],engine(0,0,0,0,0));
1.1 anton 130:
131: return(image);
132: }
133:
1.10 ! anton 134: int go_forth(Cell *image, int stack, Cell *entries)
1.1 anton 135: {
1.10 ! anton 136: Cell *sp=(Cell*)((void *)image+dictsize+dsize);
! 137: Address lp=(Address)((void *)sp+lsize);
! 138: Float *fp=(Float *)((void *)lp+fsize);
! 139: Cell *rp=(Cell*)((void *)fp+rsize);
! 140: Xt *ip=(Xt *)(image[3]);
1.8 pazsan 141: int throw_code;
1.10 ! anton 142:
1.1 anton 143: for(;stack>0;stack--)
144: *--sp=entries[stack-1];
145:
146: install_signal_handlers(); /* right place? */
1.8 pazsan 147:
148: if ((throw_code=setjmp(throw_jmp_buf))) {
149: static Cell signal_data_stack[8];
150: static Cell signal_return_stack[8];
151:
152: signal_data_stack[7]=throw_code;
153:
1.10 ! anton 154: return((int)engine((Xt *)image[4],signal_data_stack+7,
! 155: signal_return_stack+8,0,0));
1.8 pazsan 156: }
1.1 anton 157:
1.4 anton 158: return((int)engine(ip,sp,rp,fp,lp));
1.1 anton 159: }
160:
1.10 ! anton 161: int convsize(char *s, int elemsize)
! 162: /* converts s of the format #+u (e.g. 25k) into the number of bytes.
! 163: the unit u can be one of bekM, where e stands for the element
! 164: size. default is e */
! 165: {
! 166: char *endp;
! 167: int n,m;
! 168:
! 169: m = elemsize;
! 170: n = strtoul(s,&endp,0);
! 171: if (endp!=NULL) {
! 172: if (strcmp(endp,"b")==0)
! 173: m=1;
! 174: else if (strcmp(endp,"k")==0)
! 175: m=1024;
! 176: else if (strcmp(endp,"M")==0)
! 177: m=1024*1024;
! 178: else if (strcmp(endp,"e")!=0) {
! 179: fprintf(stderr,"%s: cannot grok size specification %s\n", progname, s);
! 180: exit(1);
! 181: }
! 182: }
! 183: return n*m;
! 184: }
! 185:
1.1 anton 186: int main(int argc, char **argv, char **env)
187: {
1.10 ! anton 188: char *path, *path1;
! 189: char *imagename="gforth.fi";
! 190: FILE *image_file;
! 191: int c;
! 192:
1.6 anton 193: #if defined(i386) && defined(ALIGNMENT_CHECK)
194: /* turn on alignment checks on the 486.
195: * on the 386 this should have no effect. */
196: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
197: #endif
1.2 pazsan 198:
1.10 ! anton 199: progname = argv[0];
! 200: if ((path=getenv("GFORTHPATH"))==NULL)
! 201: path = strcpy(malloc(strlen(DEFAULTPATH)+1),DEFAULTPATH);
! 202: opterr=0;
! 203: while (1) {
! 204: int option_index=0;
! 205: static struct option opts[] = {
! 206: {"image-file", required_argument, NULL, 'i'},
! 207: {"dictionary-size", required_argument, NULL, 'm'},
! 208: {"data-stack-size", required_argument, NULL, 'd'},
! 209: {"return-stack-size", required_argument, NULL, 'r'},
! 210: {"fp-stack-size", required_argument, NULL, 'f'},
! 211: {"locals-stack-size", required_argument, NULL, 'l'},
! 212: {"path", required_argument, NULL, 'p'},
! 213: {0,0,0,0}
! 214: /* no-init-file, no-rc? */
! 215: };
! 216:
! 217: c = getopt_long(argc, argv, "+drfl", opts, &option_index);
! 218: if (c==EOF)
! 219: break;
! 220: if (c=='?') {
! 221: optind--;
! 222: break;
! 223: }
! 224: switch (c) {
! 225: case 'i': imagename = optarg; break;
! 226: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
! 227: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
! 228: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
! 229: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
! 230: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
! 231: case 'p': path = optarg; break;
! 232: }
1.2 pazsan 233: }
1.10 ! anton 234: path1=path;
! 235: do {
! 236: char *pend=strchr(path, ':');
! 237: if (pend==NULL)
! 238: pend=path+strlen(path);
! 239: if (strlen(path)==0) {
! 240: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n", progname, imagename, path1);
! 241: exit(1);
! 242: }
! 243: {
! 244: int dirlen=pend-path;
! 245: char fullfilename[dirlen+strlen(imagename)+2];
! 246: memcpy(fullfilename, path, dirlen);
! 247: if (fullfilename[dirlen-1]!='/')
! 248: fullfilename[dirlen++]='/';
! 249: strcpy(fullfilename+dirlen,imagename);
! 250: image_file=fopen(fullfilename,"rb");
! 251: }
! 252: path=pend+(*pend==':');
! 253: } while (image_file==NULL);
1.1 anton 254:
255: {
1.10 ! anton 256: Cell environ[]= {(Cell)argc-(optind-1), (Cell)(argv+(optind-1)), (Cell)path1};
! 257: argv[optind-1] = progname;
! 258: /*
! 259: for (i=0; i<environ[0]; i++)
! 260: printf("%s\n", ((char **)(environ[1]))[i]);
! 261: */
! 262: exit(go_forth(loader(image_file),3, environ));
1.1 anton 263: }
264: }
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