This C program translates Mouse into C.
/*
MOUSE - A Language for Microcomputers (compiler) as described by Peter Grogono in July 1979 BYTE Magazine */ #include <stdio.h> enum tagtype { MACRO, PARAM, LOOP }; struct frame { enum tagtype tag; int pos, off; }; FILE *infile; char prog[5000]; int definitions[26]; int nprocparms[26]; int calstack[256], data[256], cal, chpos, level, offset, parnum, parbal, temp; struct frame stack[256]; int nparms, lineno = 1; char procname; char ch; #define num(ch) (ch - 'A') #define val(ch) (ch - '0') #define nextchar() (ch = prog[chpos++]) void load() { char this, last; int charnum; for (charnum = 0; charnum < 26; charnum++) { definitions[charnum] = 0; nprocparms[charnum] = 0; } charnum = 0; this = ' '; do { last = this; this = fgetc(infile); if (this == '\'') { do { this = fgetc(infile); } while (this != '\n'); } else { prog[charnum] = this; if (this >= 'A' && this <= 'Z' && last == '$') definitions[num(this)] = charnum; charnum++; } } while (this != '$' || last != '$'); } void main(int argc, char *argv[]) { int i, j; if (argc >= 0) { if (argc != 2) infile = stdin; else { infile = fopen(argv[1], "r"); if (infile == NULL) { puts("Error: cannot load program file\n"); return; } } printf("#line 1\n"); printf("#include <stdio.h>\n"); printf("int sp = 0;\n"); printf("int stack[1024];\n"); printf("void push(i) {stack[sp++] = i;}\n"); printf("int pop() {return stack[--sp];}\n"); printf("void main()\n"); printf("{\n"); printf("int data[256];\n"); printf("int temp;\n"); load(); if (infile != stdin) fclose(infile); chpos = level = offset = cal = 0; } do { nextchar(); switch (ch) { case '\n': lineno++; printf("#line %d\n", lineno); break; case ']': printf("}\n"); break; case ' ': case '$': break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': temp = 0; while (ch >= '0' && ch <= '9') { temp = 10 * temp + val(ch); nextchar(); } printf("push(%d);\n", temp); chpos--; break; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G': case 'H': case 'I': case 'J': case 'L': case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z': printf("push(%d);\n", num(ch)); break; case '?': printf("scanf(\"%%d\", &temp);\n"); printf("push(temp);\n"); break; case '!': printf("printf(\"%%d\", pop());\n"); printf("fflush(stdout);\n"); break; case '+': printf("push(pop() + pop());\n"); break; case '-': printf("push(pop() - pop());\n"); break; case '*': printf("push(pop() * pop());\n"); break; case '/': printf("push(pop() / pop());\n"); break; case '.': printf("push(data[pop()]);\n"); break; case '=': printf("temp = pop();\n"); printf("data[pop()] = temp;\n"); break; case '"': printf("printf(\""); do { nextchar(); if (ch == '!') printf("\\n"); else if (ch == '\\') printf("\\\\"); else if (ch != '\"') printf("%c", ch); } while (ch != '\"'); printf("\");\n"); break; case '[': printf("if (pop() > 0) {\n"); break; case '(': printf("while (1) {\n"); break; case '^': printf("if (pop() <= 0) break;\n"); break; case ')': printf("}\n"); break; case '#': nparms = 0; nextchar(); procname = ch; main(-1, 0); printf("proc%c(", procname); nprocparms[procname - 'A'] = nparms; for (i=0; i<nparms; i++) { printf("pop()"); if (i < nparms - 1) printf(","); } printf(");\n"); break; case '@': printf("return;\n"); break; case '%': nextchar(); printf("push(parm%c);\n", ch); break; case ';': return; case ',': /* pop(); */ nparms++; break; } } while (ch != '$'); printf("}\n"); if (argc != -1) { for (i=0; i<26; i++) { if (definitions[i]) { printf("int proc%c(", i + 'A'); for (j=0; j<nprocparms[i]; j++) { printf("int parm%c", nprocparms[i] - j + 'A' - 1); if (j < nprocparms[i] - 1) printf(","); } printf(") {\n"); printf("int data[26];\n"); printf("int temp;\n"); chpos = definitions[i] + 1; main(-1, 0); } } } }
file: /Techref/language/mouse/translate-c.htm, 5KB, , updated: 2016/1/5 14:03, local time: 2024/11/23 04:46,
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