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path: root/support/dktools/dk4strm.c
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/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4strm.ctr
*/

/**	@file dk4strm.c The dk4strm module.
*/


#line 370 "dk4strm.ctr"



#include "dk4conf.h"
#include "dk4strm.h"
#include "dk4mem.h"
#include "dk4enc.h"
#include "dk4numco.h"

#if DK4_HAVE_ASSERT_H
#ifndef	ASSERT_H_INCLUDED
#include <assert.h>
#define	ASSERT_H_INCLUDED 1
#endif
#endif




#line 388 "dk4strm.ctr"




static
void
dk4stream_api_init(dk4_stream_api_t *ptr)
{
  

#line 397 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != ptr);
#endif
  DK4_MEMRES(ptr, sizeof(dk4_stream_api_t));
  ptr->d = NULL;
  ptr->b = NULL;
  ptr->sz_in = 0;
  ptr->sz_out = 0;
  ptr->res = 0;
  ptr->cmd = 0;
  

#line 408 "dk4strm.ctr"
}



/**	Release memory allocated by a stream.
	@param	strm	Stream to release.
*/
static
void
dk4stream_release_memory(dk4_stream_t *strm)
{
  

#line 420 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) {
    dk4mem_release(strm->bi);
    dk4mem_release(strm->bo);
    strm->d = NULL;
    strm->fct = NULL;
    strm->bwr = (dk4_um_t)0UL;
    strm->szbi = 0;
    strm->szbo = 0;
    strm->usbi = 0;
    strm->usbo = 0;
    strm->rebi = 0;
    strm->fl = 0;
    strm->feoi = 0;
    strm->bwo = 0;
    dk4mem_free(strm);
  } 

#line 439 "dk4strm.ctr"
}




/**	Flush write buffer.
*/
static
int
dk4stream_i_flush_write(dk4_stream_t *strm, int flfl, dk4_er_t *erp)
{
  dk4_stream_api_t	api;
  int		 	back	=	1;
  

#line 453 "dk4strm.ctr"
  /*	Write buffer contents (if any) downwards.
  */
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (0 != strm->usbo) {		

#line 459 "dk4strm.ctr"
    dk4stream_api_init(&api);
    api.cmd   = DK4_STREAM_API_WRITE;
    api.d     = strm->d;
    api.b     = strm->bo;
    api.sz_in = strm->usbo;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_WRITE_FAILED);
    }
  }
  /*	Flush downwards.
  */
  if (0 < flfl) {			

#line 473 "dk4strm.ctr"
    dk4stream_api_init(&api);
    api.cmd = DK4_STREAM_API_FLUSH;
    api.d   = strm->d;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_FLUSH_FAILED);
    }
  }
  /*	Indicate output buffer is empty.
  */
  strm->usbo = 0;
  

#line 486 "dk4strm.ctr"
  return back;
}



/**	Internal function to write one character after checking stream.
	@param	strm	Stream to write to.
	@param	c	Character to write.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4stream_i_write_byte(dk4_stream_t *strm, char c, dk4_er_t *erp)
{
  int		 back	=	0;
  

#line 503 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (strm->usbo < strm->szbo) {
    (strm->bo)[strm->usbo] = c;
    strm->usbo += 1;
    strm->bwr += (dk4_um_t)1UL;
    if ((dk4_um_t)0UL == strm->bwr) { strm->bwo = 1; }
    back = 1;
    if (strm->usbo >= strm->szbo) {
      back = dk4stream_i_flush_write(strm, 0, erp);
    }
  } 

#line 516 "dk4strm.ctr"
  return back;
}




/**	Internal function to read a single character.
	@param	dst	Pointer to variable for result.
	@param	strm	Stream to read from.
	@return	1 on success, 0 on error.
*/
static
int
dk4stream_i_c8_read_byte(char *dst, dk4_stream_t *strm)
{
  dk4_stream_api_t	api;
  int		 	back	=	0;
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != dst);
#endif
  

#line 538 "dk4strm.ctr"
  if ((0 == strm->feoi) && ((strm->usbi == 0) || (strm->rebi >= strm->usbi))) {
    

#line 540 "dk4strm.ctr"
    dk4stream_api_init(&api);
    api.cmd   = DK4_STREAM_API_READ;
    api.d     = strm->d;
    api.b     = strm->bi;
    api.sz_in = strm->szbi;
    (*(strm->fct))(&api);
    if (0 != api.res) {			

#line 547 "dk4strm.ctr"
      strm->rebi = 0;
      strm->usbi = api.sz_out;
      if (api.sz_out < strm->szbi) {	

#line 550 "dk4strm.ctr"
        if (0 == strm->zreof) {
          dk4stream_api_init(&api);
	  api.cmd = DK4_STREAM_API_AT_END;
	  api.d   = strm->d;
	  (*(strm->fct))(&api);
	  if (0 != api.res) {		

#line 556 "dk4strm.ctr"
	    strm->feoi = 1;
	  }
	}
      }
    } else {				

#line 561 "dk4strm.ctr"
      if (0 != strm->zreof) {
        strm->feoi = 1;
      } else {
        dk4stream_api_init(&api);
        api.cmd = DK4_STREAM_API_AT_END;
        api.d   = strm->d;
        (*(strm->fct))(&api);
        if (0 != api.res) {		

#line 569 "dk4strm.ctr"
          strm->feoi = 1;
        }
      }
    }
  } else {		

#line 574 "dk4strm.ctr"
  }
  if ((0 < strm->usbi) && (strm->rebi < strm->usbi)) {
    

#line 577 "dk4strm.ctr"
    *dst = (strm->bi)[strm->rebi];
    strm->rebi += 1;
    back = 1;
  } else {		

#line 581 "dk4strm.ctr"
  }
  

#line 583 "dk4strm.ctr"
  return back;
}




dk4_stream_t *
dk4stream_open(
  void			*obj,
  dk4_stream_api_fct_t	*fct,
  int			 fl,
  size_t		 ibs,
  size_t		 obs,
  dk4_er_t		*erp
)
{
  dk4_stream_api_t	 api;
  dk4_stream_t		*back	=	NULL;
  

#line 602 "dk4strm.ctr"
  /*	Check arguments
  */
#if	DK4_USE_ASSERT
  assert(NULL != obj);
  assert(NULL != fct);
#endif
  if ((NULL == obj) || (NULL == fct)) {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    goto finished;
  }
  /*	Check flag, at least read or write must be set
  */
  if (0 == (fl & (DK4_STREAM_READ | DK4_STREAM_WRITE))) {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    goto finished;
  }
  /*	Allocate memory for stream itself
  */
  back = dk4mem_new(dk4_stream_t,1,erp);
  if (NULL == back) {
    goto finished;
  }
  /*	Initialize members
  */
  back->d = obj; back->fct = fct;
  back->bi = NULL; back->bo = NULL;
  back->bwr = (dk4_um_t)0UL;
  back->szbi = 0; back->szbo = 0;
  back->usbi = 0; back->usbo = 0; back->rebi = 0;
  back->fl = fl; back->feoi = 0;
  back->bwo = 0;
#if DK4_ON_WINDOWS
  back->oenc = DK4_FILE_ENCODING_WIN1252;
#else
  back->oenc = DK4_FILE_ENCODING_PLAIN;
#endif
  back->zreof = 0;
  /*	Allocate input buffer or destroy object
  */
  if (fl & DK4_STREAM_READ) {
    back->szbi = ((0 < ibs) ? ibs : 4096);
    back->bi = dk4mem_new(char,back->szbi,erp);
    if (NULL == back->bi) {
      dk4stream_release_memory(back);
      back = NULL;
      goto finished;
    }
  }
  /*	Allocate output buffer or destroy object
  */
  if (fl & DK4_STREAM_WRITE) {
    back->szbo = ((0 < obs) ? obs : 4096);
    back->bo = dk4mem_new(char,back->szbo,erp);
    if (NULL == back->bo) {
      dk4stream_release_memory(back);
      back = NULL;
      goto finished;
    }
  }
  /*	Check whether reading zero bytes indicates end of input
  */
  dk4stream_api_init(&api);
  api.cmd = DK4_STREAM_API_ZERO_READ_IS_EOF;
  api.d   = obj;
  (*(back->fct))(&api);
  if (0 != api.res) { back->zreof = 1; }
finished:
  

#line 670 "dk4strm.ctr"
  return back;
}



int
dk4stream_close(dk4_stream_t *strm, dk4_er_t *erp)
{
  dk4_stream_api_t	api;
  int		 	back	=	0;
  

#line 681 "dk4strm.ctr"
  /*	Check argument.
  */
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL == strm) {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    goto finished;
  }

  /*	Success so far, unless there are errors in the next sections.
  */
  back = 1;

  /*	Write bytes in output buffer downwards.
  */
  if ((0 != ((strm->fl) & DK4_STREAM_WRITE)) && (0 < strm->usbo)) {
    dk4stream_api_init(&api);
    api.cmd   = DK4_STREAM_API_WRITE;
    api.d     = strm->d;
    api.b     = strm->bo;
    api.sz_in = strm->usbo;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;		

#line 706 "dk4strm.ctr"
      dk4error_set_simple_error_code(erp, DK4_E_WRITE_FAILED);
    }
  }

  /*	Attempt to flush downwards.
  */
  if ((strm->fl) & DK4_STREAM_WRITE) {
    dk4stream_api_init(&api);
    api.cmd = DK4_STREAM_API_FLUSH;
    api.d   = strm->d;
    (*(strm->fct))(&api);
    if (0 == api.res) {
      back = 0;		

#line 719 "dk4strm.ctr"
      dk4error_set_simple_error_code(erp, DK4_E_FLUSH_FAILED);
    }
  }

  /*	Finalize downward data structures.
  */
  dk4stream_api_init(&api);
  api.cmd = DK4_STREAM_API_CLOSE;
  api.d   = strm->d;
  (*(strm->fct))(&api);
  if (0 == api.res) {
    back = 0;		

#line 731 "dk4strm.ctr"
    dk4error_set_simple_error_code(erp, DK4_E_CLOSE_FAILED);
  }

  /*	Release memory.
  */
  dk4stream_release_memory(strm);

finished:
  

#line 740 "dk4strm.ctr"
  return back;
}



int
dk4stream_write_byte(dk4_stream_t *strm, char c, dk4_er_t *erp)
{
  int		 back	=	0;
  

#line 750 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = dk4stream_i_write_byte(strm, c, erp);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 762 "dk4strm.ctr"
  return back;
}



#if	NOT_OPTIMIZED

int
dk4stream_write(dk4_stream_t *strm, const void *b, size_t sz, dk4_er_t *erp)
{
  char		*cptr;			/* Traverse buffer */
  int		 back	=	0;
  

#line 775 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != b);
  assert(0 < sz);
#endif
  if ((NULL != strm) && (NULL != b) && (0 < sz)) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = 1;
      cptr = (char *)b;
      while(sz--) {
        if (0 == dk4stream_i_write_byte(strm, *(cptr++), erp)) {
	  back = 0;
	}
      }
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 795 "dk4strm.ctr"
  return back;
}

#else

int
dk4stream_write(dk4_stream_t *strm, const void *b, size_t sz, dk4_er_t *erp)
{
  char		*cptr;			/* Traverse buffer */
  size_t	 bc;
  int		 back	=	0;
  int		 cc;

  

#line 809 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != b);
  assert(0 < sz);
#endif
  if ((NULL != strm) && (NULL != b) && (0 < sz)) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = 1;
      cptr = (char *)b;
      do {
        cc = 0;					

#line 820 "dk4strm.ctr"
        if (0 < sz) {
	  if (strm->usbo < strm->szbo) {	

#line 822 "dk4strm.ctr"
	    /* Attempt to copy as many bytes as still free in output buffer */
	    bc = strm->szbo - strm->usbo; 

#line 824 "dk4strm.ctr"
	    /* If not enough bytes available, correct number of bytes */
	    if (bc > sz) { bc = sz; }	  

#line 826 "dk4strm.ctr"
	    DK4_MEMCPY(&((strm->bo)[strm->usbo]), cptr, bc);
	    strm->usbo	+= bc;		

#line 828 "dk4strm.ctr"
	    cptr	=  &(cptr[bc]);
	    sz		-= bc;		

#line 830 "dk4strm.ctr"
	    if ((DK4_UM_MAX - (dk4_um_t)bc) < strm->bwr) {
	      strm->bwo = 1;			

#line 832 "dk4strm.ctr"
	      back	= 0;
	    }
	    strm->bwr   += (dk4_um_t)bc; 

#line 835 "dk4strm.ctr"
	    if (strm->usbo >= strm->szbo) {	

#line 836 "dk4strm.ctr"
	      if (0 == dk4stream_i_flush_write(strm, 0, erp)) {
	        back = 0;			

#line 838 "dk4strm.ctr"
	      }
	    }
	    if (0 < sz) { cc = 1; }
	  } else {				

#line 842 "dk4strm.ctr"
	    if (0 == dk4stream_i_flush_write(strm, 0, erp)) {
	      back = 0;				

#line 844 "dk4strm.ctr"
	    }
	  }
	}
      } while(0 != cc);
    } else {					

#line 849 "dk4strm.ctr"
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {					

#line 852 "dk4strm.ctr"
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 854 "dk4strm.ctr"
  return back;
}

#endif



int
dk4stream_write_char_string(dk4_stream_t *strm, const char *str, dk4_er_t *erp)
{
  size_t	sl;
  int		back	= 0;
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != str);
#endif
  if ((NULL != strm) && (NULL != str)) {
    sl = strlen(str);
    back = dk4stream_write(strm, str, sl, erp);
  }
  else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4stream_flush_read(dk4_stream_t *strm, dk4_er_t *erp)
{
  int back = 0;
  

#line 887 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) {
    if ((strm->fl) & DK4_STREAM_READ) {
      back = 1;
      strm->usbi = 0;
      strm->rebi = 0;
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 901 "dk4strm.ctr"
  return back;
}



int
dk4stream_flush_write(dk4_stream_t *strm, int flfl, dk4_er_t *erp)
{
  int back = 0;
  

#line 911 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) {
    if ((strm->fl) & DK4_STREAM_WRITE) {
      back = dk4stream_i_flush_write(strm, flfl, erp);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 923 "dk4strm.ctr"
  return back;
}



int
dk4stream_flush(dk4_stream_t *strm, int flfl, dk4_er_t *erp)
{
  int		 back	=	0;
  

#line 933 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) {
    back = 1;
    if ((strm->fl) & DK4_STREAM_WRITE) {
      if (0 == dk4stream_flush_write(strm, flfl, erp)) {
        back = 0;
      }
    }
    if ((strm->fl) & DK4_STREAM_READ) {
      if (0 == dk4stream_flush_read(strm, erp)) {
        back = 0;
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 951 "dk4strm.ctr"
  return back;
}



int
dk4stream_c8_read_byte(char *dst, dk4_stream_t *strm, dk4_er_t *erp)
{
  int		 back = 0;
  

#line 961 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != dst);
#endif
  if ((NULL != dst) && (NULL != strm)) {	

#line 966 "dk4strm.ctr"
    if ((strm->fl) & DK4_STREAM_READ) {		

#line 967 "dk4strm.ctr"
      back = dk4stream_i_c8_read_byte(dst, strm);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 974 "dk4strm.ctr"
  return back;
}



int
dk4stream_read(void *b, size_t *szptr, dk4_stream_t *strm, dk4_er_t *erp)
{
  char		*cptr;			/* Traverse the buffer */
  size_t	 szin;			/* Input: Available buffer size */
  size_t	 szout;			/* Output: Used buffer size */
  int		 back	=	0;	/* Function result */
  int		 cc	=	1;	/* Flag: Can continue */
  

#line 988 "dk4strm.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != b);
  assert(NULL != szptr);
  assert(0 < *szptr);
#endif
  if ((NULL != b) && (NULL != szptr) && (NULL != strm)) {
    if (((strm->fl) & DK4_STREAM_READ) && (0 < *szptr)) {
      szin = *szptr; szout = 0;
      cptr = (char *)b;
      do {
        if (0 != dk4stream_i_c8_read_byte(cptr++, strm)) {
	  szout++;
	  if (szout >= szin) {
	    cc = 0;
	    back = 1;
	  }
	} else {
	  cc = 0;
	  if (0 < szout) {
	    back = 1;
	  } else {
	    if (0 != dk4stream_found_eof(strm)) {
	      dk4error_set_simple_error_code(erp, DK4_E_NOT_FOUND);
	    } else {
	      dk4error_set_simple_error_code(erp, DK4_E_READ_FAILED);
	    }
	  }
	}
      } while (0 != cc);
      *szptr = szout;
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 1025 "dk4strm.ctr"
  return back;
}



dk4_um_t
dk4stream_bytes_written(const dk4_stream_t *strm)
{
  dk4_um_t	back	=	(dk4_um_t)0UL;
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) { back = strm->bwr; }
  return back;
}



int
dk4stream_overflow_bytes_written(const dk4_stream_t *strm)
{
  int back = 0;
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) { back = strm->bwo; }
  return back;
}



int
dk4stream_found_eof(const dk4_stream_t *strm)
{
  int back = 0;
#if	DK4_USE_ASSERT
  assert(NULL != strm);
#endif
  if (NULL != strm) {
    back = strm->feoi;
  }
  return back;
}