source: git/Singular/febase.h @ 8f769bb

#ifndef FEBASE_H
#define FEBASE_H
/****************************************
*  Computer Algebra System SINGULAR     *
****************************************/
/* $Id: febase.h,v 1.39 1999-09-22 10:19:04 Singular Exp $ */
/*
* ABSTRACT: basic i/o
*/
#include <stdio.h>
#include <string.h>
#include "structs.h"

/* define DIR_SEPP, etc */
#ifdef macintosh
#  define  DIR_SEP ':'
#  define  DIR_SEPP ":"
#  define  UP_DIR ""
#else  /* unix , WINNT */
#  define  DIR_SEP '/'
#  define  DIR_SEPP "/"
#  define  UP_DIR ".."
#endif  /* macintosh */
// this might still get reset by feInitResources
extern char fePathSep;

/* define MAXPATHLEN */
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#include <limits.h>

#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif

/*
// These are our versions of fopen and fread They are very similar to
// the usual fopen and fread, except that on reading, they always
// convert "\r\n" into " \n" and "\r" into "\n".
//
// IMPORTANT: do only use myfopen and myfread when reading text,
// do never use fopen and fread
*/
#ifndef unix
FILE *myfopen(char *path, char *mode);
#else
#define myfopen fopen
#endif
size_t myfread(void *ptr, size_t size, size_t nmemb, FILE *stream);


extern char*  feErrors;
extern int    feErrorsLen;
extern FILE*  feProtFile;
extern FILE*  feFilePending; /*temp. storage for grammar.y */
extern char   fe_promptstr[];
extern int    si_echo, printlevel;
extern int    pagelength, colmax;
extern int    yy_blocklineno;
extern int    yy_noeof;
extern char   prompt_char;
extern const char feNotImplemented[];
#ifdef HAVE_TCL
extern BOOLEAN tclmode;
#endif
extern BOOLEAN errorreported;
extern BOOLEAN feProt;
extern BOOLEAN feWarn;
extern BOOLEAN feOut;


#define PROT_NONE 0
#define PROT_I    1
#define PROT_O    2
#define PROT_IO   3

/* the C-part: */
#define mflush() fflush(stdout)

#ifdef __cplusplus
extern "C" {
#endif

void   Werror(char *fmt, ...);
void   WerrorS(const char *s);
void   Print(char* fmt, ...);
void   PrintLn();
#ifdef HAVE_TCL
void   PrintTCLS(const char c, const char * s);
#else
#define PrintTCLS(A,B) Print("TCL-ErrS:%s",B)
#endif
void   PrintS(char* s);
#define feReportBug(s) fePrintReportBug(s, __FILE__, __LINE__)
void fePrintReportBug(char* msg, char* file, int line);

#ifdef __cplusplus
}
/* the C++-part: */

enum   feBufferTypes
{
  BT_none  = 0,  // entry level
  BT_break = 1,  // while, for
  BT_proc,       // proc
  BT_example,    // example
  BT_file,       // <"file"
  BT_execute,    // execute
  BT_if,         // if
  BT_else        // else
};

enum   feBufferInputs
{
  BI_stdin = 1,
  BI_buffer,
  BI_file
};

/*****************************************************************
 *
 * Resource management (feResources.cc)
 *
 *****************************************************************/
// returns value of Resource as read-only string, or NULL
// if Resource not found
// issues warning, if explicitely requested (warn > 0), or 
// if warn < 0 and Resource is gotten for the first time
// Always quiet if warn == 0
char* feResource(const char id, int warn = -1);
char* feResource(const char* key, int warn = -1);
// This needs to be called before the first call to feResource
// Initializes Resources, SearchPath, and extends PATH
void feInitResources(char* argv0);
// Re-inits resources, should be called after changing env. variables
void feReInitResources();
// Prints resources into string with StringAppend, etc
void feStringAppendResources(int warn = -1);

/*****************************************************************
 *
 * help system (fehelp.cc)
 *
 *****************************************************************/
// if str != NULL display help for str
// display general help, otherwise
void feHelp(char* str = NULL);
// if browser != NULL or feOpt("browser") != NULL 
//    set HelpBrowser to browser 
// otherwise, if browser was already set, leave as is, 
//            if not, choose first available browser
// return string identifying current browser
// keeps feOpt("browser") up-to-date
// Optional warn argument is as in feResource
char* feHelpBrowser(char* browser = NULL, int warn = -1);
void feStringAppendBrowsers(int warn = -1);

/*****************************************************************
 *
 * version Id
 *
 *****************************************************************/
extern unsigned long feVersionId;

/*****************************************************************
 *
 * File Stuff
 *
 *****************************************************************/
FILE *  feFopen(char *path, char *mode, char *where=NULL, int useWerror=FALSE,
                int path_only=FALSE);

#ifndef __MWERKS__
#ifdef HAVE_TCL

inline void PrintTCL(const char c, int l,const char *s)
{
  if (s!=NULL) printf("%c:%d:%s",c,l,s);
  else if(l==0) printf("%c:0:",c);
  else printf("%c:1:%c",c,'0'+l);
  fflush(stdout);
}
#else
#define PrintTCL(A,B,C) Print("TCL-Err:%s",C)
#endif /* HAVE_TCL */
#endif /* __MWERKS__ */

char *  StringAppend(char *fmt, ...);
char *  StringAppendS(char *s);
char *  StringSetS(char* s);
const  char * VoiceName();
void    VoiceBackTrack();
void    WarnS(const char *s);
void    Warn(const char *fmt, ...);
BOOLEAN contBuffer(feBufferTypes typ);
char *  eati(char *s, int *i);
BOOLEAN exitBuffer(feBufferTypes typ);
BOOLEAN exitVoice();
void    monitor(char* s,int mode);
BOOLEAN newFile(char* fname, FILE *f=NULL);
void    newBuffer(char* s, feBufferTypes t, procinfo *pname = NULL, int start_lineno = 0);
void *  myynewbuffer();
void    myyoldbuffer(void * oldb);

class Voice
{
  public:
    Voice  * next;
    Voice  * prev;
    char   * filename;    // file name or proc name
    procinfo * pi;        // proc info
    void   * oldb;        // internal scanner buffer
    // for files only:
    FILE * files;         // file handle
    // for buffers only:
    char * buffer;        // buffer pointer
    long   fptr;          // current position in buffer

    int    start_lineno;  // lineno, to restore in recursion
    int    curr_lineno;   // current lineno
    feBufferInputs   sw;  // BI_stdin: read from STDIN
                          // BI_buffer: buffer
                          // BI_file: files
    char   ifsw;          // if-switch:
            /*1 ifsw==0: no if statement, else is invalid
            *       ==1: if (0) processed, execute else
            *       ==2: if (1) processed, else allowed but not executed
            */
    feBufferTypes   typ;  // buffer type: see BT_..

  Voice() { memset(this,0,sizeof(*this));}
  feBufferTypes Typ();
  void Next();
} ;

extern Voice  *currentVoice;

Voice * feInitStdin();

/* feread.cc: */

/* the interface for reading: */
extern  char * (*fe_fgets_stdin)(char *pr,char *s, int size);
void fe_reset_input_mode();

/* possible implementations: */

  /* readline, linked in: */
  char * fe_fgets_stdin_rl(char *pr,char *s, int size);

  /* emulated readline: */
  char * fe_fgets_stdin_emu(char *pr,char *s, int size);

  /* fgets: */
  char * fe_fgets(char *pr,char *s, int size);
 
  #ifdef HAVE_TCL
  /* tcl: */
  char * fe_fgets_tcl(char *pr,char *s, int size);
  #endif

  /* dummy (for batch mode): */
  char * fe_fgets_dummy(char *pr,char *s, int size);

#endif /* c++ only */

/* everything in between calls to these procedures is printed into a string
 * which is returned by SprintEnd()
 */
void SPrintStart();
char* SPrintEnd();


#ifdef HAVE_DYN_RL
#undef HAVE_READLINE
#define HAVE_FEREAD 1
#endif

#endif /* ifndef FEBASE_H */