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|
/*** print.c ******************************************************************
**
** This file is part of BibTool.
** It is distributed under the GNU General Public License.
** See the file COPYING for details.
**
** (c) 1996-2020 Gerd Neugebauer
**
** Net: gene@gerd-neugebauer.de
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2, or (at your option)
** any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
** Description:
** This module provides also access to the functions and
** variables defined in |entry.c|. Consult also the documentation
** of this file for details.
**
**
******************************************************************************/
#include <bibtool/general.h>
#include <bibtool/symbols.h>
#include <bibtool/print.h>
#include <bibtool/entry.h>
#include <bibtool/rsc.h>
#include <bibtool/macros.h>
#include <bibtool/sbuffer.h>
#include <bibtool/expand.h>
#include <bibtool/error.h>
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
#ifdef __STDC__
#define _ARG(A) A
#else
#define _ARG(A) ()
#endif
char * sput_record _ARG((Record rec,DB db,String start));/* print.c */
static int fput_char _ARG((int c)); /* print.c */
static int sput_char _ARG((int c)); /* print.c */
static void indent _ARG((int col,int (*fct)_ARG((int))));/* print.c */
static void line_breaking _ARG((String t,int align,int (*fct)_ARG((int))));/* print.c*/
static void print_equation _ARG((String pre,Symbol s,Symbol t,int align,int (*fct)_ARG((int))));/* print.c*/
static void puts_in _ARG((String s,int in,int (*fct)_ARG((int))));/* print.c */
void fput_record _ARG((FILE *file,Record rec,DB db,String start));/* print.c*/
void put_record _ARG((int (*fct)_ARG((int)),Record rec,DB db,String start));/* print.c*/
void set_key_type _ARG((String s)); /* print.c */
void set_symbol_type _ARG((String s)); /* print.c */
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*---------------------------------------------------------------------------*/
#define TAB_WIDTH 8
static int symbol_type = SYMBOL_TYPE_LOWER; /* */
static String s_upper = (String)"upper"; /* */
static String s_lower = (String)"lower"; /* */
static String s_cased = (String)"cased"; /* */
/*-----------------------------------------------------------------------------
** Function: set_symbol_type()
** Purpose: Function to set the symbol type which is used by the
** printing routine. The argument is a string describing
** the value to use. Possible values are |"upper"|,
** |"lower"|, and |"cased"|. The comparison of the values
** is performed case insensitive.
**
** If no appropriate value is found then an error message
** is issued as the only action.
**
** This function is called from \File{rsc.c}.
** Arguments:
** s String description of the value.
** Returns: nothing
**___________________________________________________ */
void set_symbol_type(s) /* */
register String s; /* */
{ if ( case_eq(s, s_upper) ) /* */
{ symbol_type = SYMBOL_TYPE_UPPER; } /* */
else if ( case_eq(s, s_cased) ) /* */
{ symbol_type = SYMBOL_TYPE_CASED; } /* */
else if ( case_eq(s, s_lower) ) /* */
{ symbol_type = SYMBOL_TYPE_LOWER; } /* */
else /* */
{ Err("Unknown symbol type ignored.\n"); } /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: get_symbol_type()
** Type: String
** Purpose: Getter for the symbol type.
** Arguments: none
** Returns: one of the values SYMBOL\_TYPE\_UPPER, SYMBOL\_TYPE\_LOWER,
** or SYMBOL\_TYPE\_CASED as defined in header \textsf{type.h}
**___________________________________________________ */
String get_symbol_type() /* */
{ switch (symbol_type) /* */
{ case SYMBOL_TYPE_UPPER: return s_upper; /* */
case SYMBOL_TYPE_LOWER: return s_lower; /* */
case SYMBOL_TYPE_CASED: return s_cased; /* */
default: return NULL; /* */
} /* */
} /*------------------------*/
#ifdef MAYBE_IN_THE_NEXT_RELEASE
static int key_type = SYMBOL_TYPE_LOWER; /* */
/*-----------------------------------------------------------------------------
** Function*: set_key_type()
** Purpose: Wrapper function to set the static variable key_type.
** This function is called from rsc.c
** Arguments:
** s String description of the value.
** Returns: nothing
**___________________________________________________ */
void set_key_type(s) /* */
register String s; /* */
{ if ( case_cmp(s,s_upper) ) /* */
{ key_type = SYMBOL_TYPE_UPPER; } /* */
else if ( case_cmp(s,s_cased) ) /* */
{ key_type = SYMBOL_TYPE_CASED; } /* */
else if ( case_cmp(s,s_lower) ) /* */
{ key_type = SYMBOL_TYPE_LOWER; } /* */
else /* */
{ Err("Unknown key type ignored.\n"); } /* */
} /*------------------------*/
#endif
/*------------------------*/
static int column = 0; /* The current column of */
/* the output stream is */
/* kept in this variable.*/
#define NL (void)(*fct)('\n'),column=0
#define PUTC(C) (void)((*fct)(C),++column)
#define PUTS(S) puts_in((String)(S), 0, fct)
/*-----------------------------------------------------------------------------
** Function: puts_in()
** Purpose: Print a string and update current column.
** Arguments:
** s string to be printed.
** in indentation. Alignment column.
** fct function to use for writing a character.
** Returns: nothing
**___________________________________________________ */
static void puts_in(s,in,fct) /* */
register String s; /* */
register int in; /* */
int (*fct)_ARG((int)); /* */
{ /* */
while ( *s ) /* */
{ (void)(*fct)(*s); /* */
switch ( *(s++) ) /* */
{ case '\t': /* */
column += TAB_WIDTH - (column%TAB_WIDTH); /* */
break; /* */
case '\n': /* */
column = 0; /* */
if ( in > 0 ) indent(in, fct); /* */
break; /* */
default: ++column; /* */
} /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: indent()
** Purpose: Add spaces or tabs to indent to the given column.
** If the current column is beyond col then nothing happens.
** The resource use.tabs can be used to disable the use of TAB.
** Arguments:
** col Target column
** fct function to use for writing a character.
** Returns: nothing
**___________________________________________________ */
static void indent(col,fct) /* */
register int col; /* */
int (*fct)_ARG((int)); /* */
{ /* */
if ( col > rsc_linelen ) col = rsc_linelen; /* */
while ( column < col ) /* */
{ if ( rsc_use_tabs /* TAB is allowed and */
&& column+TAB_WIDTH-(column%TAB_WIDTH) <= col )/* enough space left */
{ (void)(*fct)('\t'); /* then put a TAB and */
column += TAB_WIDTH - (column%TAB_WIDTH); /* update column. */
} /* */
else /* otherwise */
{ (void)(*fct)(' '); /* write a single space */
++column; /* and advance column. */
} /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: line_breaking()
** Purpose: Write out a right hand side of an equation.
** If it does not fit break the line into several parts and
** print them on successive lines.
** Temporarily end marks are placed inside the string,
** but the old contents has been restored at the end.
** Arguments:
** t string to print.
** align starting column for continuation lines.
** fct function to use for writing a character.
** Returns: nothing
**___________________________________________________ */
static void line_breaking(t, align, fct) /* */
register String t; /* string to print. */
int align; /* alignment column */
int (*fct)_ARG((int)); /* */
{ register String s; /* intermediate pointer */
char end_c; /* temp. character. */
int brace, /* brace counter */
len; /* length of rem. output */
bool first = true; /* indicator for # */
/* */
while (is_space(*t)) ++t; /* skip leading spaces */
/* */
indent(align, fct); /* goto alignment column */
/* */
while (*t) /* as long as sth to print*/
{ s = t; /* */
/* */
switch (*t) /* */
{ case '"': /* QUOTED PART */
for ( len = 2, ++t; /* */
*t && *t != '\"'; /* Search terminating " */
++t, ++len ) /* */
{ if ( *t == '\\' && *(t+1) != '\0' ) /* skip over quoted and */
{ ++t; ++len; } /* similar constructs. */
} /* */
if ( *t ) ++t; /* skip after end, if poss*/
if ( *t ) { end_c = *t; *t = '\0'; } /* save char and mark end.*/
else { end_c = *t; } /* */
break; /* */
case '{': /* BRACED PART */
brace = 1; /* */
for ( len = 2, ++t; /* find matching brace. */
*t && brace > 0; /* */
++t, ++len ) /* */
{ switch ( *t ) /* */
{ case '\\': if ( *(t+1) ) ++t; break; /* ignore \{ \} etc */
case '{': ++brace; break; /* */
case '}': brace--; break; /* */
} /* */
} /* */
if ( *t ) { end_c = *t; *t = '\0'; } /* save char and mark end.*/
else { end_c = *t; } /* */
break; /* */
default: /* Now we should have a */
while ( is_allowed(*t) ) ++t; /* SYMBOL */
end_c = *t; *t = '\0'; /* */
s = SymbolValue(get_item(symbol(s), /* */
symbol_type)); /* */
len = strlen((char*)s); /* */
} /* */
/* Now s is a single */
/* string to print. */
/* t points to the closing*/
/* '\0' of s */
/* end_c is the old *t */
while ( *s ) /* */
{ if ( len + (first?0:3) <= rsc_linelen - column)/* Is there enough space*/
{ if ( !first ) PUTS(" # "); /* Maybe add separator */
puts_in(s, align, fct); /* write it out */
s = t; /* and we are done */
} /* */
else if ( !first ) /* If sth has been before */
{ puts_in((String)"\n# ", align - 2, fct); /* start a new line */
first = true; /* */
} /* Now we have to break */
else /* a single entry */
{ Uchar save_c; /* */
String save_ptr, /* */
ptr; /* */
/* */
if ( 0 <= rsc_linelen - column ) /* */
save_ptr = s + rsc_linelen - column; /* Potential end */
else /* */
save_ptr = s; /* */
/* */
for ( ptr = s; /* Search next newline */
ptr < save_ptr && *ptr != '\n'; /* or end of region */
ptr++ ) {} /* */
/* */
if ( *ptr == '\n' ) /* */
{ save_ptr = ptr; /* */
*save_ptr = '\0'; /* Save and mark end. */
puts_in(s, align, fct); /* */
NL; /* */
indent(align,fct); /* */
*save_ptr = '\n'; /* Restore end */
len += s - save_ptr - 1; /* Update the length */
s = save_ptr + 1; /* */
} /* */
else /* */
{ /* */
while ( save_ptr != s && *save_ptr != ' ' )/* */
{ save_ptr--; } /* Find a SPC backward */
/* */
if ( save_ptr == s ) /* If no SPC found then */
{ while ( *save_ptr && *save_ptr != ' ' )/* search one forward. */
{ save_ptr++; } /* */
} /* */
len += s - save_ptr; /* Update the length */
save_c = *save_ptr; *save_ptr = '\0'; /* Save and mark end. */
puts_in(s, align, fct); /* */
if (save_c != 0) /* */
{ NL; /* */
indent(align, fct); /* */
} /* */
*save_ptr = save_c; /* Restore end */
s = save_ptr; /* */
while ( is_space(*s) ) { s++; len--; } /* Skip spaces */
} /* */
} /* */
} /* */
*t = end_c; /* Restore the end */
/* */
while ( *t && *t != '#' ) ++t; /* Search next # */
if ( *t ) ++t; /* Skip beyond the # */
while ( is_space(*t) ) ++t; /* Ignore following spaces*/
first = false; /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: print_equation()
** Purpose: Print something of the form s = t
** If desired it can be indented. t is broken if it doesn't fit
** in one line.
** Arguments:
** pre string to be printed before s.
** s left hand side
** t right hand side
** align target column. If negative no indentation is performed.
** fct function to use for writing a character.
** Returns: nothing
**___________________________________________________' */
static void print_equation(pre, lhs, rhs, align, fct)/* */
String pre; /* */
Symbol lhs; /* */
Symbol rhs; /* */
int align; /* */
int (*fct)_ARG((int)); /* */
{ /* */
if ( align < 0 ) /* */
{ PUTS(pre); /* */
PUTS(SymbolValue(get_item(lhs, symbol_type))); /* */
PUTS(rsc_print_we ? " = " : "="); /* */
} /* */
else /* */
{ indent(rsc_indent, fct); /* */
PUTS(pre); /* */
PUTS(SymbolValue(get_item(lhs, symbol_type))); /* */
if ( column >= align - 2 && rsc_print_we ) /* */
{ PUTC(' '); } /* */
else if ( rsc_eq_right ) /* */
{ indent(align - 2, fct); } /* */
else if ( column < align || rsc_print_we ) /* */
{ PUTC(' '); } /* */
PUTC('='); /* */
if ( rsc_print_we ) { PUTC(' '); } /* */
line_breaking(SymbolValue(rhs), align, fct); /* */
} /* */
} /*------------------------*/
static FILE * ofile=NULL;
/*-----------------------------------------------------------------------------
** Function: fput_char()
** Purpose: Output function which places the character on the |ofile|
** stream.
** Arguments:
** c Character to print.
** Returns: The return status of |fputc()|.
**___________________________________________________ */
static int fput_char(c) /* */
int c; /* */
{ return fputc(c, ofile); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: fput_record()
** Purpose: Format and print a complete record onto a given stream.
** for further details see |put_record()|.
** Arguments:
** file Stream to print onto.
** db Database containing the record.
** rec Record to print.
** start Initial string used before the type. Should be "@" normally.
** Returns: nothing
**___________________________________________________ */
void fput_record(file, rec, db, start) /* */
FILE *file; /* */
DB db; /* */
Record rec; /* record to print */
String start; /* initial string = "@" */
{ /* */
ofile = file; /* */
put_record(fput_char, rec, db, start); /* */
} /*------------------------*/
static StringBuffer *osb = NULL;
/*-----------------------------------------------------------------------------
** Function: sput_char()
** Purpose: Output function which places the character on the |osb|
** string buffer.
** Arguments:
** c Character to print.
** Returns: The return status of |fputc()|.
**___________________________________________________ */
static int sput_char(c) /* */
int c; /* */
{ return sbputchar(c, osb); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: sput_record()
** Purpose: Format and print a complete record into a string and return it.
** The string returned points to static memory which is
** reused upon the next invocation of this function.
** Arguments:
** file Stream to print onto.
** db Database containing the record.
** rec Record to print.
** start Initial string used before the type. Should be "@" normally.
** Returns: The string containing the printed representation.
**___________________________________________________ */
char * sput_record(rec, db, start) /* */
DB db; /* */
Record rec; /* record to print */
String start; /* initial string = "@" */
{ /* */
if ( osb == NULL ) osb = sbopen(); /* */
sbrewind(osb); /* */
put_record(sput_char, rec, db, start); /* */
return sbflush(osb); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: put_record()
** Purpose: Format and print a complete record.
** The record type and several resources are taken into
** account. The following external variables (from
** |rsc.c|) are taken into account:
** \begin{description}
** \item[rsc\_parentheses] If this boolean variable is
** |true| then |(| and |)| are used to delimit the
** record. Otherwise |{| and |}| are used.
** \item[rsc\_col\_p] This integer variable controls the
** indentation of preamble records.
** \item[rsc\_col\_s] This integer variable controls the
** indentation of string records.
** \item[rsc\_expand\_macros] If this boolean variable is
** set then macros are expanded before the record is
** printed. This does not effect the internal
** representation.
** \item[rsc\_col] This integer variable controls the
** indentation of normal records.
** \item[rsc\_col\_key] This integer variable controls the
** indentation of the key in a normal record.
** \item[rsc\_newlines] This integer variable controls
** the number of newlines printed after a normal record.
** \item[rsc\_linelen] This integer variable controls
** the length of the line. The line breaking algorithm
** is applied if this column is about to be violated.
** \item[rsc\_indent] This integer variable controls the
** indentation of equations.
** \item[rsc\_eq\_right] This boolean variable controls
** the alignment of the |=| in equations. It it is set
** then the equality sign is flushed right. Otherwise it
** is flushed left.
** \end{description}
**
** The field in the record are sorted with
** |sort_record()| before they are printed.
**
** In normal records all fields not starting with an
** allowed character are ignored. Thus it is possible to
** store private and invisible information in a
** field. Simply start the field name with an not allowed
** character like |%|.
** Arguments:
** fct function to use for writing a character.
** db Database containing the record.
** rec Record to print.
** start Initial string used before the type. Should be "@" normally.
** Returns: nothing
**___________________________________________________ */
void put_record(fct, rec, db, start) /* */
int (*fct)_ARG((int)); /* */
Record rec; /* */
DB db; /* */
String start; /* initial string = "@" */
{ Symbol *hp; /* heap pointer */
unsigned int i; /* */
char open_brace, close_brace; /* */
static int first = 1; /* */
/* */
sort_record(rec); /* */
/* */
hp = RecordHeap(rec); /* */
if ( rsc_no_nl && first ) { first = 0; } /* */
else if ( IsNormalRecord(RecordType(rec)) ) { NL; }/* */
/* */
if ( *SymbolValue(RecordComment(rec)) ) /* */
{ PUTS(SymbolValue(RecordComment(rec))); /* */
NL; /* */
} /* */
/* */
if (rsc_parentheses) /* */
{ open_brace = '('; /* */
close_brace = ')'; /* */
} /* */
else /* */
{ open_brace = '{'; /* */
close_brace = '}'; /* */
} /* */
/* */
switch (RecordType(rec)) /* */
{ case BIB_COMMENT: /* */
#ifdef OLD
indent(rsc_col_c, fct); /* */
PUTS(*hp); /* */
PUTC(' '); /* */
NL; /* */
#endif
break; /* */
case BIB_PREAMBLE: /* */
PUTS(start); /* */
PUTS(SymbolValue(EntryName(RecordType(rec))));/* */
PUTC(open_brace); /* */
indent(rsc_col_p,fct); /* */
line_breaking(SymbolValue(*hp), /* */
rsc_col_p, /* */
fct); /* */
PUTC(' '); /* */
PUTC(close_brace); /* */
NL; /* */
break; /* */
case BIB_STRING: /* */
PUTS(start); /* */
PUTS(SymbolValue(EntryName(RecordType(rec))));/* */
PUTC(open_brace); /* */
print_equation(s_empty, /* */
*hp, /* */
*(hp+1), /* */
rsc_col_s, /* */
fct); /* */
PUTC(' '); /* */
PUTC(close_brace); /* */
NL; /* */
break; /* */
case BIB_ALIAS: /* */
PUTS(start); /* */
PUTS(SymbolValue(EntryName(RecordType(rec))));/* */
PUTC(open_brace); /* */
print_equation(s_empty, /* */
*hp, /* */
*(hp+1), /* */
rsc_col_s, /* */
fct); /* */
PUTC(' '); /* */
PUTC(close_brace); /* */
NL; /* */
break; /* */
case BIB_INCLUDE: /* */
PUTS(start); /* */
PUTS(SymbolValue(EntryName(RecordType(rec))));/* */
PUTC(open_brace); /* */
PUTS(SymbolValue(*RecordHeap(rec))); /* */
PUTC(close_brace); /* */
NL; /* */
break; /* */
case BIB_MODIFY: /* */
default: /* */
/* */
if (RecordType(rec) == type_xdata /* */
&& rsc_expand_xdata) return; /* */
/* */
PUTS(start); /* */
PUTS(SymbolValue(EntryName(RecordType(rec))));/* */
PUTC(open_brace); /* */
{ String comma1 = s_empty, /* */
comma2 = (String)","; /* */
/* */
if (rsc_print_ce) /* */
{ comma1 = comma2; /* */
comma2 = s_empty; /* */
} /* */
/* */
for ( i = RecordFree(rec); i > 0; i -= 2 ) /* */
{ /* No deleted or */
if (*hp && is_allowed(*SymbolValue(*hp)))/* private entry */
{ /* */
if ( *(hp+1) ) /* If equation */
{ PUTS(comma1); /* */
NL; /* */
print_equation(comma2, /* */
*hp, /* */
(rsc_expand_macros /* */
? expand_rhs(*(hp+1),/* */
(rsc_braces/* */
? sym_open_brace/* */
: sym_double_quote),/* */
(rsc_braces/* */
? sym_close_brace/* */
: sym_double_quote),/* */
db, /* */
false) /* */
: *(hp+1) ), /* */
rsc_col, /* */
fct); /* */
} /* */
else /* Otherwise print a key */
{ indent(rsc_col_key, fct); /* */
PUTS(SymbolValue(get_key(*hp))); /* */
} /* */
} /* */
hp += 2; /* Goto next pair. */
} /* */
} /* */
if (rsc_print_tc) { PUTC(','); } /* */
NL; /* */
PUTC(close_brace); /* */
for ( i = rsc_newlines; i > 0; --i ) { NL; } /* */
} /* */
} /*------------------------*/
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