/* Copyright 2002 Rene Rivera.
** Distributed under the Boost Software License, Version 1.0.
** (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
/*
# yyacc - yacc wrapper
#
# Allows tokens to be written as `literal` and then automatically
# substituted with #defined tokens.
#
# Usage:
# yyacc file.y filetab.h file.yy
#
# inputs:
# file.yy yacc grammar with ` literals
#
# outputs:
# file.y yacc grammar
# filetab.h array of string <-> token mappings
#
# 3-13-93
# Documented and p moved in sed command (for some reason,
# s/x/y/p doesn't work).
# 10-12-93
# Take basename as second argument.
# 12-31-96
# reversed order of args to be compatible with GenFile rule
# 11-20-2002
# Reimplemented as a C program for portability. (Rene Rivera)
*/
void print_usage();
char * copy_string(char * s, int l);
char * tokenize_string(char * s);
int cmp_literal(const void * a, const void * b);
typedef struct
{
char * string;
char * token;
} literal;
int main(int argc, char ** argv)
{
int result = 0;
if (argc != 4)
{
print_usage();
result = 1;
}
else
{
FILE * token_output_f = 0;
FILE * grammar_output_f = 0;
FILE * grammar_source_f = 0;
grammar_source_f = fopen(argv[3],"r");
if (grammar_source_f == 0) { result = 1; }
if (result == 0)
{
literal literals[1024];
int t = 0;
char l[2048];
while (1)
{
if (fgets(l,2048,grammar_source_f) != 0)
{
char * c = l;
while (1)
{
char * c1 = strchr(c,'`');
if (c1 != 0)
{
char * c2 = strchr(c1+1,'`');
if (c2 != 0)
{
literals[t].string = copy_string(c1+1,c2-c1-1);
literals[t].token = tokenize_string(literals[t].string);
t += 1;
c = c2+1;
}
else
break;
}
else
break;
}
}
else
{
break;
}
}
literals[t].string = 0;
literals[t].token = 0;
qsort(literals,t,sizeof(literal),cmp_literal);
{
int p = 1;
int i = 1;
while (literals[i].string != 0)
{
if (strcmp(literals[p-1].string,literals[i].string) != 0)
{
literals[p] = literals[i];
p += 1;
}
i += 1;
}
literals[p].string = 0;
literals[p].token = 0;
t = p;
}
token_output_f = fopen(argv[2],"w");
if (token_output_f != 0)
{
int i = 0;
while (literals[i].string != 0)
{
fprintf(token_output_f," { \"%s\", %s },\n",literals[i].string,literals[i].token);
i += 1;
}
fclose(token_output_f);
}
else
result = 1;
if (result == 0)
{
grammar_output_f = fopen(argv[1],"w");
if (grammar_output_f != 0)
{
int i = 0;
while (literals[i].string != 0)
{
fprintf(grammar_output_f,"%%token %s\n",literals[i].token);
i += 1;
}
rewind(grammar_source_f);
while (1)
{
if (fgets(l,2048,grammar_source_f) != 0)
{
char * c = l;
while (1)
{
char * c1 = strchr(c,'`');
if (c1 != 0)
{
char * c2 = strchr(c1+1,'`');
if (c2 != 0)
{
literal key;
literal * replacement = 0;
key.string = copy_string(c1+1,c2-c1-1);
key.token = 0;
replacement = (literal*)bsearch(
&key,literals,t,sizeof(literal),cmp_literal);
*c1 = 0;
fprintf(grammar_output_f,"%s%s",c,replacement->token);
c = c2+1;
}
else
{
fprintf(grammar_output_f,"%s",c);
break;
}
}
else
{
fprintf(grammar_output_f,"%s",c);
break;
}
}
}
else
{
break;
}
}
fclose(grammar_output_f);
}
else
result = 1;
}
}
if (result != 0)
{
perror("yyacc");
}
}
return result;
}
static char * usage[] = {
"yyacc <grammar output.y> <token table output.h> <grammar source.yy>",
0 };
void print_usage()
{
char ** u;
for (u = usage; *u != 0; ++u)
{
fputs(*u,stderr); putc('\n',stderr);
}
}
char * copy_string(char * s, int l)
{
char * result = (char*)malloc(l+1);
strncpy(result,s,l);
result[l] = 0;
return result;
}
char * tokenize_string(char * s)
{
char * result;
char * literal = s;
int l;
int c;
if (strcmp(s,":") == 0) literal = "_colon";
else if (strcmp(s,"!") == 0) literal = "_bang";
else if (strcmp(s,"!=") == 0) literal = "_bang_equals";
else if (strcmp(s,"&&") == 0) literal = "_amperamper";
else if (strcmp(s,"&") == 0) literal = "_amper";
else if (strcmp(s,"+") == 0) literal = "_plus";
else if (strcmp(s,"+=") == 0) literal = "_plus_equals";
else if (strcmp(s,"||") == 0) literal = "_barbar";
else if (strcmp(s,"|") == 0) literal = "_bar";
else if (strcmp(s,";") == 0) literal = "_semic";
else if (strcmp(s,"-") == 0) literal = "_minus";
else if (strcmp(s,"<") == 0) literal = "_langle";
else if (strcmp(s,"<=") == 0) literal = "_langle_equals";
else if (strcmp(s,">") == 0) literal = "_rangle";
else if (strcmp(s,">=") == 0) literal = "_rangle_equals";
else if (strcmp(s,".") == 0) literal = "_period";
else if (strcmp(s,"?") == 0) literal = "_question";
else if (strcmp(s,"?=") == 0) literal = "_question_equals";
else if (strcmp(s,"=") == 0) literal = "_equals";
else if (strcmp(s,",") == 0) literal = "_comma";
else if (strcmp(s,"[") == 0) literal = "_lbracket";
else if (strcmp(s,"]") == 0) literal = "_rbracket";
else if (strcmp(s,"{") == 0) literal = "_lbrace";
else if (strcmp(s,"}") == 0) literal = "_rbrace";
else if (strcmp(s,"(") == 0) literal = "_lparen";
else if (strcmp(s,")") == 0) literal = "_rparen";
l = strlen(literal)+2;
result = (char*)malloc(l+1);
for (c = 0; literal[c] != 0; ++c)
{
result[c] = toupper(literal[c]);
}
result[l-2] = '_';
result[l-1] = 't';
result[l] = 0;
return result;
}
int cmp_literal(const void * a, const void * b)
{
return strcmp(((const literal *)a)->string,((const literal *)b)->string);
}