main.c
资源名称:pccts133.zip [点击查看]
上传用户:itx_2006
上传日期:2007-01-06
资源大小:493k
文件大小:6k
源码类别:
编译器/解释器
开发平台:
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- /* 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
- * 1989-1998
- */
- #include <stdio.h>
- #include "stdpccts.h"
- char program[] = "dlg";
- char version[] = "1.33MR14"; /* 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 __STDC__
- 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 */
- 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; }
- #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"},
- { "-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 }
- };
- void ProcessArgs(argc, argv, options)
- int argc;
- char **argv;
- Opt *options;
- {
- 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++;
- }
- }
- int main(argc,argv)
- int argc;
- char *argv[];
- {
- init();
- fprintf(stderr, "%s Version %s 1989-1998n", &(program[0]),
- &(version[0]));
- if ( argc == 1 )
- {
- Opt *p = options;
- fprintf(stderr, "%s [options] f1 f2 ... fnn",argv[0]);
- while ( *(p->option) != '*' )
- {
- fprintf(stderr, "t%s %st%sn",
- p->option,
- (p->arg)?"___":" ",
- p->descr);
- p++;
- }
- }else{
- ProcessArgs(argc-1, &(argv[1]), options);
- if (input_stream = read_stream(file_str[0])) {
- /* 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 init()
- {
- 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 new_automaton_mode() /* MR1 */
- {
- set_free(used_chars);
- clear_hash();
- }