Pccts/dlg/main.c

	main.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/* Main function for dlg version
 *
 * SOFTWARE RIGHTS
 *
 * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
 * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
 * company may do whatever they wish with source code distributed with
 * PCCTS or the code generated by PCCTS, including the incorporation of
 * PCCTS, or its output, into commerical software.
 *
 * We encourage users to develop software with PCCTS.  However, we do ask
 * that credit is given to us for developing PCCTS.  By "credit",
 * we mean that if you incorporate our source code into one of your
 * programs (commercial product, research project, or otherwise) that you
 * acknowledge this fact somewhere in the documentation, research report,
 * etc...  If you like PCCTS and have developed a nice tool with the
 * output, please mention that you developed it using PCCTS.  In
 * addition, we ask that this header remain intact in our source code.
 * As long as these guidelines are kept, we expect to continue enhancing
 * this system and expect to make other tools available as they are
 * completed.
 *
 * DLG 1.33
 * Will Cohen
 * With mods by Terence Parr; AHPCRC, University of Minnesota
 * 1989-2001
 */

#include <stdio.h>
#include "stdpccts.h"

char    program[] = "dlg";
char    version[] = "1.33MR33";                 /* MRXXX */
int numfiles = 0;
char    *file_str[2] = {NULL, NULL};
char    *mode_file = "mode.h";
char    *class_name = DEFAULT_CLASSNAME;
char    *OutputDirectory = TopDirectory;

/* Option variables */
int comp_level = 0;
int interactive = FALSE;
int case_insensitive = FALSE;
int warn_ambig = FALSE;
int gen_cpp = FALSE;

#ifdef __USE_PROTOS
static int ci_strequ(char *a,char *b)
#else
static int ci_strequ(a,b)
  char  *a;
  char  *b;
#endif
{
  for ( ;*a != 0 && *b != 0; a++, b++) {
    if (toupper(*a) != toupper(*b)) return 0;
  }
  return (*a == *b);
}

/* Option List Stuff */
#ifdef __USE_PROTOS
void p_comp0(void)      {comp_level = 0;}
void p_comp1(void)      {comp_level = 1;}
void p_comp2(void)      {comp_level = 2;}
void p_stdio(void)      { file_str[numfiles++] = NULL;}
void p_file(char *s)    { file_str[numfiles++] = s;}
void p_cl_name(char *s, char *t)
    {
        if ( gen_cpp ) {
            class_name = t;
        }
        else {
            warning("-cl only valid in C++ mode; -cl ignored...",0);
        }
    }
void p_mode_file(char *s, char *t){mode_file=t;}
void p_outdir(char *s,char *t) {OutputDirectory=t;}
void p_ansi(void)       {gen_ansi = TRUE;}
void p_interactive(void)    {interactive = TRUE;}
void p_case_s(void)     { case_insensitive = FALSE; }
void p_case_i(void)     { case_insensitive = TRUE; }
void p_warn_ambig(void) { warn_ambig = TRUE; }
void p_cpp(void)        { gen_cpp = TRUE; }
#else
void p_comp0()      {comp_level = 0;}
void p_comp1()      {comp_level = 1;}
void p_comp2()      {comp_level = 2;}
void p_stdio()      { file_str[numfiles++] = NULL;}
void p_file(s) char *s; { file_str[numfiles++] = s;}
void p_cl_name(s,t)
    char *s, *t;
    {
        if ( gen_cpp ) {
            class_name = t;
        }
        else {
            warning("-cl only valid in C++ mode; -cl ignored...",0);
        }
    }
void p_mode_file(s,t) char *s,*t;{mode_file=t;}
void p_outdir(s,t) char *s,*t;{OutputDirectory=t;}
void p_ansi()       {gen_ansi = TRUE;}
void p_interactive()    {interactive = TRUE;}
void p_case_s()     { case_insensitive = FALSE; }
void p_case_i()     { case_insensitive = TRUE; }
void p_warn_ambig() { warn_ambig = TRUE; }
void p_cpp()        { gen_cpp = TRUE; }
#endif

#ifdef __cplusplus
typedef void (*WildFunc)(...);
#else
typedef void (*WildFunc)();
#endif

typedef struct {
            char *option;
            int  arg;
            WildFunc process;
            char *descr;
        } Opt;

Opt options[] = {
    { "-CC", 0, (WildFunc)p_cpp, "Generate C++ output" },
    { "-C0", 0, (WildFunc)p_comp0, "No compression (default)" },
    { "-C1", 0, (WildFunc)p_comp1, "Compression level 1" },
    { "-C2", 0, (WildFunc)p_comp2, "Compression level 2" },
    { "-ga", 0, (WildFunc)p_ansi, "Generate ansi C"},
    { "-Wambiguity", 0, (WildFunc)p_warn_ambig, "Warn if expressions ambiguous"},
    { "-m", 1, (WildFunc)p_mode_file, "Rename lexical mode output file"},
    { "-i", 0, (WildFunc)p_interactive, "Build interactive scanner (not valid for C++ mode)"},
    { "-ci", 0, (WildFunc)p_case_i, "Make lexical analyzer case insensitive"},
    { "-cl", 1, (WildFunc)p_cl_name, "Rename lexer class (DLGLexer); only used for -CC"},
    { "-cs", 0, (WildFunc)p_case_s, "Make lexical analyzer case sensitive (default)"},
    { "-o",  1, (WildFunc)p_outdir, OutputDirectoryOption},
    { "-", 0, (WildFunc)p_stdio, "Use standard i/o rather than file"},
    { "*", 0, (WildFunc)p_file, ""}, /* anything else is a file */
    { NULL, 0, NULL }
 };

#ifdef __USE_PROTOS
void ProcessArgs(int argc, char **argv, Opt *options)
#else
void ProcessArgs(argc, argv, options)
int argc;
char **argv;
Opt *options;
#endif
{
    Opt *p;

    while ( argc-- > 0 )
    {
        p = options;
        while ( p->option != NULL )
        {
            if ( strcmp(p->option, "*") == 0 ||
                 ci_strequ(p->option,*argv) )
            {
                if ( p->arg )
                {
                    (*p->process)( *argv, *(argv+1) );
                    argv++;
                    argc--;
                }
                else
                    (*p->process)( *argv );
                break;
            }
            p++;
        }
        argv++;
    }
}

#ifdef __USE_PROTOS
int main(int argc, char *argv[])
#else
int main(argc, argv)
int argc;
char *argv[];
#endif
{
    init();
    fprintf(stderr, "%s  Version %s   1989-2001\n", &(program[0]),
        &(version[0]));
    if ( argc == 1 )
    {
        Opt *p = options;
        fprintf(stderr, "%s [options] f1 f2 ... fn\n",argv[0]);
        while ( *(p->option) != '*' )
        {
            fprintf(stderr, "\t%s %s\t%s\n",
                            p->option,
                            (p->arg)?"___":"   ",
                            p->descr);
            p++;
        }
    }else{
        ProcessArgs(argc-1, &(argv[1]), options);
        if (interactive && gen_cpp) {
            fprintf(stderr,"\n");
/***  MR21a This statement is wrong ! ***/
#if 0
***         fprintf(stderr,"Interactive lexer option (\"-i\") has no effect when in C++ mode\n");
***         fprintf(stderr,"because of extra buffering provided by ANTLRTokenBuffer class.\n");
***         fprintf(stderr,"\n");
#endif
        }
        input_stream = read_stream(file_str[0]);
        if (input_stream) {
            /* don't overwrite unless input okay */
            if ( gen_cpp ) {
                output_stream = write_stream(ClassName(CPP_FILE_SUFFIX));
                if ( file_str[1]!=NULL ) {
                    warning("output file implicit in C++ mode; ignored...",0);
                }
                class_stream = write_stream(ClassName(".h"));
                mode_stream = class_stream;
            }
            else {
                output_stream = write_stream(file_str[1]);
                mode_stream = write_stream(mode_file);
            }
        }
        /* make sure that error reporting routines in grammar
           know what the file really is */
        /* make sure that reading and writing somewhere */
        if (input_stream && output_stream && mode_stream){
            ANTLR(grammar(), input_stream);
        }
        p_class_def2();         /* MR1 */
    }
    if ( output_stream!=NULL ) fclose(output_stream);
    if ( !gen_cpp && mode_stream!=NULL ) fclose(mode_stream);
    if ( class_stream!=NULL ) fclose(class_stream);
    exit(PCCTS_EXIT_SUCCESS);
    return 0;       /* get rid of warning message MR1 */
}

/* initialize all the variables */
void
#ifdef __USE_PROTOS
init(void)
#else
init()
#endif
{
    register int i;

#ifdef SPECIAL_INITS
    special_inits();                    /* MR1 */
#endif
    used_chars = empty;
    used_classes = empty;
    /* make the valid character set */
    normal_chars = empty;
    /* NOTE: MIN_CHAR is EOF */
    /* NOTE: EOF is not quite a valid char, it is special. Skip it*/
    for (i = 1; i<CHAR_RANGE; ++i){
        set_orel(i,&normal_chars);
    }
    make_nfa_model_node();
    clear_hash();
    /* NOTE: need to set this flag before the lexer starts getting */
    /* tokens */
    func_action = FALSE;
}

/* stuff that needs to be reset when a new automaton is being built */
void
#ifdef __USE_PROTOS
new_automaton_mode(void)                    /* MR1 */
#else
new_automaton_mode()                    /* MR1 */
#endif
{
    set_free(used_chars);
    clear_hash();
}