Annotation of gforth/main.c, revision 1.12
1.1 anton 1: /*
1.12 ! pazsan 2: $Id: main.c,v 1.11 1994/09/08 17:20:09 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
! 20: extern int getopt (argc, argv, optstring);
! 21:
! 22: extern char *optarg;
! 23: extern int optind, opterr;
! 24: #endif
1.2 pazsan 25:
1.10 anton 26: #ifndef DEFAULTPATH
27: # define DEFAULTPATH "/usr/local/lib/gforth:."
28: #endif
29:
1.1 anton 30: #ifdef DIRECT_THREADED
1.2 pazsan 31: # define CA(n) (symbols[(n)])
1.1 anton 32: #else
1.2 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)
1.1 anton 52: * data (size in image[1])
53: * tags (1 bit/data cell)
54: *
55: * tag==1 mean that the corresponding word is an address;
56: * If the word is >=0, the address is within the image;
57: * addresses within the image are given relative to the start of the image.
58: * If the word is =-1, the address is NIL,
1.2 pazsan 59: * If the word is between -2 and -5, it's a CFA (:, Create, Constant, User)
60: * If the word is -6, it's a DOES> CFA
61: * If the word is -7, it's a DOES JUMP
62: * If the word is <-7, it's a primitive
1.1 anton 63: */
64:
1.10 anton 65: void relocate(Cell *image, char *bitstring, int size, Label symbols[])
1.1 anton 66: {
1.5 pazsan 67: int i=0, j, k, steps=(size/sizeof(Cell))/8;
68: char bits;
69: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
70:
71: for(k=0; k<=steps; k++)
72: for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1)
73: if(bits & 0x80)
74: if(image[i]<0)
75: switch(image[i])
76: {
77: case CF_NIL : image[i]=0; break;
78: case CF(DOCOL) :
79: case CF(DOVAR) :
80: case CF(DOCON) :
1.9 anton 81: case CF(DOUSER) :
82: case CF(DODEFER) :
83: MAKE_CF(image+i,symbols[CF(image[i])]); break;
1.5 pazsan 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;
1.2 pazsan 91:
1.5 pazsan 92: CACHE_FLUSH(image,size);
1.1 anton 93: }
94:
1.10 anton 95: Cell *loader(FILE *imagefile)
96: {
97: Cell header[3];
98: Cell *image;
99: int wholesize;
100: int imagesize; /* everything needed by the image */
101:
102: fread(header,1,3*sizeof(Cell),imagefile);
103: if (dictsize==0)
104: dictsize = header[0];
105: if (dsize==0)
106: dsize=header[2];
107: if (rsize==0)
108: rsize=header[2];
109: if (fsize==0)
110: fsize=header[2];
111: if (lsize==0)
112: lsize=header[2];
113: dictsize=maxaligned(dictsize);
114: dsize=maxaligned(dsize);
115: rsize=maxaligned(rsize);
116: lsize=maxaligned(lsize);
117: fsize=maxaligned(fsize);
118:
119: wholesize = dictsize+dsize+rsize+fsize+lsize;
120: imagesize = header[1]+((header[1]-1)/sizeof(Cell))/8+1;
121: image=malloc(wholesize>imagesize?wholesize:imagesize);
122: memset(image,0,wholesize); /* why? - anton */
1.1 anton 123: image[0]=header[0];
124: image[1]=header[1];
1.10 anton 125: image[2]=header[2];
1.1 anton 126:
1.10 anton 127: fread(image+3,1,header[1]-3*sizeof(Cell),imagefile);
128: fread(((void *)image)+header[1],1,((header[1]-1)/sizeof(Cell))/8+1,
1.1 anton 129: imagefile);
130: fclose(imagefile);
131:
1.10 anton 132: relocate(image,(char *)image+header[1],header[1],engine(0,0,0,0,0));
1.1 anton 133:
134: return(image);
135: }
136:
1.10 anton 137: int go_forth(Cell *image, int stack, Cell *entries)
1.1 anton 138: {
1.10 anton 139: Cell *sp=(Cell*)((void *)image+dictsize+dsize);
140: Address lp=(Address)((void *)sp+lsize);
141: Float *fp=(Float *)((void *)lp+fsize);
142: Cell *rp=(Cell*)((void *)fp+rsize);
143: Xt *ip=(Xt *)(image[3]);
1.8 pazsan 144: int throw_code;
1.10 anton 145:
1.1 anton 146: for(;stack>0;stack--)
147: *--sp=entries[stack-1];
148:
149: install_signal_handlers(); /* right place? */
1.8 pazsan 150:
151: if ((throw_code=setjmp(throw_jmp_buf))) {
152: static Cell signal_data_stack[8];
153: static Cell signal_return_stack[8];
154:
155: signal_data_stack[7]=throw_code;
156:
1.10 anton 157: return((int)engine((Xt *)image[4],signal_data_stack+7,
158: signal_return_stack+8,0,0));
1.8 pazsan 159: }
1.1 anton 160:
1.4 anton 161: return((int)engine(ip,sp,rp,fp,lp));
1.1 anton 162: }
163:
1.10 anton 164: int convsize(char *s, int elemsize)
165: /* converts s of the format #+u (e.g. 25k) into the number of bytes.
166: the unit u can be one of bekM, where e stands for the element
167: size. default is e */
168: {
169: char *endp;
170: int n,m;
171:
172: m = elemsize;
173: n = strtoul(s,&endp,0);
174: if (endp!=NULL) {
175: if (strcmp(endp,"b")==0)
176: m=1;
177: else if (strcmp(endp,"k")==0)
178: m=1024;
179: else if (strcmp(endp,"M")==0)
180: m=1024*1024;
181: else if (strcmp(endp,"e")!=0) {
182: fprintf(stderr,"%s: cannot grok size specification %s\n", progname, s);
183: exit(1);
184: }
185: }
186: return n*m;
187: }
188:
1.1 anton 189: int main(int argc, char **argv, char **env)
190: {
1.10 anton 191: char *path, *path1;
192: char *imagename="gforth.fi";
193: FILE *image_file;
1.12 ! pazsan 194: int c, retvalue;
1.10 anton 195:
1.6 anton 196: #if defined(i386) && defined(ALIGNMENT_CHECK)
197: /* turn on alignment checks on the 486.
198: * on the 386 this should have no effect. */
199: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
200: #endif
1.2 pazsan 201:
1.10 anton 202: progname = argv[0];
203: if ((path=getenv("GFORTHPATH"))==NULL)
204: path = strcpy(malloc(strlen(DEFAULTPATH)+1),DEFAULTPATH);
205: opterr=0;
206: while (1) {
207: int option_index=0;
1.12 ! pazsan 208: #ifdef USE_GETOPT
1.10 anton 209: static struct option opts[] = {
210: {"image-file", required_argument, NULL, 'i'},
211: {"dictionary-size", required_argument, NULL, 'm'},
212: {"data-stack-size", required_argument, NULL, 'd'},
213: {"return-stack-size", required_argument, NULL, 'r'},
214: {"fp-stack-size", required_argument, NULL, 'f'},
215: {"locals-stack-size", required_argument, NULL, 'l'},
216: {"path", required_argument, NULL, 'p'},
217: {0,0,0,0}
218: /* no-init-file, no-rc? */
219: };
220:
221: c = getopt_long(argc, argv, "+drfl", opts, &option_index);
1.12 ! pazsan 222: #else
! 223: c = getopt(argc, argv, "imdrflp");
! 224: #endif
! 225:
1.10 anton 226: if (c==EOF)
227: break;
228: if (c=='?') {
229: optind--;
230: break;
231: }
232: switch (c) {
233: case 'i': imagename = optarg; break;
234: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
235: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
236: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
237: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
238: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
239: case 'p': path = optarg; break;
240: }
1.2 pazsan 241: }
1.10 anton 242: path1=path;
243: do {
244: char *pend=strchr(path, ':');
245: if (pend==NULL)
246: pend=path+strlen(path);
247: if (strlen(path)==0) {
248: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n", progname, imagename, path1);
249: exit(1);
250: }
251: {
252: int dirlen=pend-path;
253: char fullfilename[dirlen+strlen(imagename)+2];
254: memcpy(fullfilename, path, dirlen);
255: if (fullfilename[dirlen-1]!='/')
256: fullfilename[dirlen++]='/';
257: strcpy(fullfilename+dirlen,imagename);
258: image_file=fopen(fullfilename,"rb");
259: }
260: path=pend+(*pend==':');
261: } while (image_file==NULL);
1.1 anton 262:
263: {
1.10 anton 264: Cell environ[]= {(Cell)argc-(optind-1), (Cell)(argv+(optind-1)), (Cell)path1};
265: argv[optind-1] = progname;
266: /*
267: for (i=0; i<environ[0]; i++)
268: printf("%s\n", ((char **)(environ[1]))[i]);
269: */
1.12 ! pazsan 270: retvalue=go_forth(loader(image_file),3,environ);
! 271: deprep_terminal();
! 272: exit(retvalue);
1.1 anton 273: }
274: }
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