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|
/*** parse.c ******************************************************************
**
** This file is part of BibTool.
** It is distributed under the GNU General Public License.
** See the file COPYING for details.
**
** (c) 1996-2017 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.
**
******************************************************************************/
#include <bibtool/general.h>
#include <bibtool/symbols.h>
#include <bibtool/record.h>
#include <bibtool/entry.h>
#include <bibtool/error.h>
#include <bibtool/pxfile.h>
#include <bibtool/rsc.h>
#include <bibtool/stack.h>
#include <bibtool/sbuffer.h>
#include <bibtool/macros.h>
#include <bibtool/print.h>
#ifdef HAVE_LIBKPATHSEA
#ifdef __STDC__
#define HAVE_PROTOTYPES
#endif
#include <kpathsea/tex-file.h>
#endif
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
#ifdef __STDC__
#define _ARG(A) A
#else
#define _ARG(A) ()
#endif
bool read_rsc _ARG((String name)); /* parse.c */
bool see_bib _ARG((String fname)); /* parse.c */
bool seen _ARG((void)); /* parse.c */
int parse_bib _ARG((Record rec)); /* parse.c */
static bool parse_block _ARG((int quotep)); /* parse.c */
static bool parse_equation _ARG((Record rec)); /* parse.c */
static bool parse_key _ARG((int alpha)); /* parse.c */
static bool parse_rhs _ARG((void)); /* parse.c */
static bool parse_string _ARG((int quotep)); /* parse.c */
static bool parse_symbol _ARG((int alpha)); /* parse.c */
static bool parse_value _ARG((void)); /* parse.c */
static bool see_rsc _ARG((String fname)); /* parse.c */
static int fill_line _ARG((void)); /* parse.c */
static int see_bib_msg _ARG((char *s)); /* parse.c */
static int skip _ARG((int inc)); /* parse.c */
static int skip_c _ARG((void)); /* parse.c */
static int skip_nl _ARG((void)); /* parse.c */
static void init___ _ARG((char ***pathp,char **pattern,char **envvp,char *env));/* parse.c*/
static void init_parse _ARG((void)); /* parse.c */
static void parse_number _ARG((void)); /* parse.c */
void init_read _ARG((void)); /* parse.c */
void set_rsc_path _ARG((String val)); /* parse.c */
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------
** Variable*: parse_sb
** Purpose: This string buffer is used temporaliry during parsing.
**___________________________________________________ */
static StringBuffer * parse_sb = (StringBuffer*)NULL;
#define FLBLEN 80 /* initial size and increment of line buffer */
static char *filename;
static FILE *file;
static String file_line_buffer;
static String flp;
static size_t fl_size = 0;
static int flno = 0;
/*---------------------------------------------------------------------------*/
#define EmptyC (*flp=='\0')
#define CurrentC *flp
#define FutureC *(flp+1)
#define ClearLine (*flp='\0')
#define GetC skip(true)
#define NextC *(flp++)
#define SkipC ++flp
#define TestC skip(false)
#define UnGetC flp--
#define InitLine *file_line_buffer = '\0'; \
flp = file_line_buffer; \
flno = 0;
/*---------------------------------------------------------------------------*/
static String str_unexpected = (String)"Unexpected character encountered";
static char *str_stdin = "<stdin>";
#define Error3(X,Y,Z) error(ERR_ERROR|ERR_POINT|ERR_FILE \
| (rsc_parse_exit ? ERR_EXIT : 0), \
(String)X,(String)Y,(String)Z, \
file_line_buffer,flp,flno,filename)
#define Error(X) error(ERR_ERROR|ERR_POINT|ERR_FILE \
| (rsc_parse_exit ? ERR_EXIT : 0), \
(String)X, s_empty,s_empty, \
file_line_buffer,flp,flno,filename)
#define Warning(X) error(ERR_WARN|ERR_POINT|ERR_FILE,(String)X, \
s_empty,s_empty, \
file_line_buffer,flp,flno,filename)
#define UnterminatedError(X,LINE) \
error(ERR_ERROR|ERR_FILE \
| (rsc_parse_exit ? ERR_EXIT : 0), \
(String)X, s_empty,s_empty, \
NULL,NULL,LINE,filename)
#define UnexpectedError Error(str_unexpected)
/*-----------------------------------------------------------------------------
** Function*: init___()
** Purpose: Initialize the reading apparatus.
** Arguments:
** pathp the path array
** pattern the pattern array
** envvp the environment array
** env the environment string
** Returns: nothing
**___________________________________________________ */
static void init___(pathp,pattern,envvp,env) /* */
char ***pathp; /* */
char **pattern; /* */
char **envvp; /* */
char *env; /* */
{ register char **cpp, /* */
*cp; /* */
/* */
if (*pathp != (char**)0) /* */
{ free((char*)*pathp); /* */
*pathp = (char**)0; /* */
} /* */
/* */
if ((cp = getenv(env)) != NULL) /* */
{ *envvp = cp; } /* */
/* */
if (*envvp) /* */
{ *pathp = px_s2p(*envvp,*rsc_env_sep); /* */
if (*pathp == (char**)0) /* */
{ WARNING2(env,"search path extension failed.");/* */
} /* */
DebugPrint2("Path extension ",env); /* */
} /* */
/* */
if (*rsc_dir_file_sep != '/') /* */
{ for (cpp = pattern; *cpp; ++cpp) /* */
{ *cpp = new_string(*cpp); /* */
for (cp = *cpp; *cp; ++cp) /* */
{ if (*cp == '/') *cp = *rsc_dir_file_sep; /* */
} /* */
} /* */
} /* */
} /*------------------------*/
#ifndef HAVE_LIBKPATHSEA
static char **f_path = (char**)0; /* */
static char *f_pattern[] = /* */
{ "%s/%s", "%s/%s.bib", NULL }; /* */
#endif
/*-----------------------------------------------------------------------------
** Function: init_read()
** Purpose: Initialize the reading apparatus.
** Primarily try to figure out the file search path.
**
** Note that this function is for internal purposes
** mainly. The normal user should call |init_bibtool()|
** instead. Just in case the search paths are changed
** afterwards this function has to be called again to
** propagate the information.
** Arguments: none
** Returns: nothing
**___________________________________________________ */
void init_read() /* */
{ /* */
#ifndef HAVE_LIBKPATHSEA
init___(&f_path, /* */
f_pattern, /* */
(char**)&rsc_v_bibtex, /* */
(char*)rsc_e_bibtex ); /* */
#endif
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: see_bib_msg()
** Purpose: Message function for use with |px_fopen()|.
** Arguments:
** s String to print
** Returns: |true| to indicate that continuation is desired.
**___________________________________________________ */
static int see_bib_msg(s) /* */
register char *s; /* */
{ /* */
if (rsc_verbose) VerbosePrint2("Trying ", s); /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: see_bib()
** Purpose: Open a \BibTeX{} file to read from.
** If the argument is |NULL| then |stdin| is used as
** input stream.
**
** This function has to be called before |parse()| can be
** called. It initializes the parser routine and takes
** care that the next reading is done from the given
** file.
**
** The file opened with this function has to be closed
** with |seen()|.
**
** This function is for internal purposes mainly. See
** |read_db()| for a higher level function to read a
** database.
** Arguments:
** fname Name of the file or |NULL|.
** Returns: |true| iff the file could be opened for reading.
**___________________________________________________ */
bool see_bib(fname) /* */
register String fname; /* */
{ /* */
init_parse(); /* */
InitLine; /* */
if (fname == NULL) /* */
{ /* */
filename = str_stdin; /* */
file = stdin; /* */
return true; /* */
} /* */
#ifdef HAVE_LIBKPATHSEA
filename = kpse_find_file((char*)fname, /* */
kpse_bib_format, /* */
TRUE); /* */
if (filename == NULL) return false; /* */
file = fopen(filename,"r"); /* */
#else
file = px_fopen((char*)fname, /* */
"r", /* */
f_pattern, /* */
f_path, /* */
see_bib_msg); /* */
filename = px_filename; /* */
#endif
return (file != NULL); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: seen()
** Purpose: Close input file for the \BibTeX{} reading apparatus.
** After this function has been called |parse()| might
** not return sensible results.
**
** This function is for internal purposes mainly. See
** |read_db()| for a higher level function to read a
** database.
** Arguments: none
** Returns: |false| if an attempt was made to close an already
** closed file.
**___________________________________________________ */
bool seen() /* */
{ /* */
if (file == stdin) /* */
{ file = NULL; /* */
return true; /* */
} /* */
else if (file) /* */
{ (void)fclose(file); /* */
file = NULL; /* */
return true; /* */
} /* */
return false; /* */
} /*------------------------*/
#define Expect(C,N) if (GetC != C) { UnexpectedError; return(N); }
#define ExpectSymbol(C,N) if (!parse_symbol(C)) return (N)
#define ExpectKey(C,N) if (!parse_key(C)) return (N)
#define ExpectRhs(N) if (!parse_rhs()) return (N)
#define ExpectEq(R,N) if (!parse_equation(R)) return (N)
#define ExpectEqMac(R,N) if (!parse_equation(R)) return (N)
/*-----------------------------------------------------------------------------
** Function*: init_parse()
** Purpose: Initialize the parser.
** This function has to be invoked before the parser can be used.
** Arguments: none
** Returns: nothing
**___________________________________________________ */
static void init_parse() /* */
{ /* */
if (fl_size != 0) return; /* Already initialzed? */
/* */
fl_size = FLBLEN; /* */
if ((file_line_buffer=(String)malloc(fl_size * sizeof(Uchar)))/* */
== NULL) /* */
{ OUT_OF_MEMORY("line buffer"); } /* Allocate line buffer */
/* or message and exit. */
if (parse_sb == (StringBuffer*)0 && /* Try to initialize the */
(parse_sb=sbopen()) == (StringBuffer*)0) /* string buffer for the */
{ OUT_OF_MEMORY("parser"); /* parser or exit */
} /* with error message. */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: fill_line()
** Purpose: Filling the line buffer until end-of-line or end-of-file
** encountered.
**
** Since I don't want to use a fixed line length the algorithm
** is a little bit more complicated.
** First I try to read into the file_line_buffer as it is.
** If this succeeds I check to see what caused |fgets| to
** terminate. Either a end-of-line is in the buffer or
** the buffer is not filled, i.e. end-of-file has been
** encountered, then |0| is returned.
** Otherwise the buffer has been filled and I try to enlarge the
** buffer and read another chunk of bytes.
** Arguments: none
** Returns: Returns 0 iff a character has been read.
**___________________________________________________' */
static int fill_line() /* */
{ register size_t len; /* */
/* */
flp = file_line_buffer; /* Reset line pointer */
++flno; /* Increase line number */
/* */
if (fgets((char*)file_line_buffer, fl_size,file) /* */
== NULL) /*Get first chunk */
{ ClearLine; /* or report EOF */
DebugPrint1("Reading failed for first line."); /* */
return 1; /* */
} /* */
/* */
FOREVER /* */
{ for (len = 0; /* Find the end */
file_line_buffer[len] != '\0'; /* of the buffer and */
++len) ; /* count the length. */
/* */
#ifdef DEBUG
ErrPrintF2("+++ BibTool: line buffer: used %d of %d\n",/* */
len + 1, /* */
fl_size); /* */
#endif
/* */
if (file_line_buffer[len-1] == '\n' /* */
|| len < fl_size - 1) /* */
{ return 0; } /* */
/* */
if ((file_line_buffer = (String) /* Try to enlarge */
realloc((char*)file_line_buffer, /* the line buffer */
fl_size+=FLBLEN)) == NULL) /* */
{ OUT_OF_MEMORY("line buffer"); } /* */
flp = file_line_buffer; /* Reset line pointer */
/* */
if (fgets((char*)file_line_buffer + len, /* */
FLBLEN + 1, /* */
file) /* */
== NULL) /* */
{ return 0; } /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: skip()
** Purpose: Skip over spaces. Return the next non-space character or |EOF|.
** Arguments:
** inc If inc is |true| point to the first character after the one
** returned.
** Returns: The next character
**___________________________________________________ */
static int skip(inc) /* */
register bool inc; /* */
{ /* */
FOREVER /* */
{ if (EmptyC && fill_line()) return EOF; /* */
else if (is_space(CurrentC)) SkipC; /* */
else return (inc ? NextC : CurrentC); /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: skip_c()
** Purpose: Return the next character or EOF.
** Arguments: none
** Returns: the next character or |EOF|
**___________________________________________________ */
static int skip_c() /* */
{ /* */
FOREVER /* */
{ if (EmptyC && fill_line()) return EOF; /* */
else { return NextC; } /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: skip_nl()
** Purpose: Return the next character or EOF.
** Any number of spaces is returned as a single space.
** Doubled newlines are preserved.
** Arguments: none
** Returns: the next character or EOF
**___________________________________________________ */
static int skip_nl() /* */
{ static bool state = false; /* */
int c; /* */
/* */
if (state) { state = false; return '\n'; } /* */
/* */
FOREVER /* */
{ if (EmptyC && fill_line()) return EOF; /* */
else if (is_space(CurrentC)) /* */
{ /* */
for (c = skip_c(); /* */
c != EOF && is_space(c) && c != '\n'; /* */
c = skip_c()) {} /* */
if (c == EOF) return EOF; /* */
if (c != '\n') { UnGetC; return ' '; } /* */
/* */
for (c = skip_c(); /* */
c != EOF && is_space(c) && c != '\n'; /* */
c = skip_c()) {} /* */
if (c == EOF) return EOF; /* */
if (c != '\n') { UnGetC; return ' '; } /* */
/* */
for (c = skip_c(); /* */
c != EOF && is_space(c); /* */
c = skip_c()) {} /* */
if (c == EOF) return EOF; /* */
UnGetC; /* */
state = true; /* */
return '\n'; /* */
} /* */
else { return NextC; } /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_symbol()
** Purpose: Parse a symbol and push it to the stack.
** Upon failure issue an appropriate message.
** Arguments:
** alpha indicator that the symbol has to start with an alpha character
** Returns: Success status
**___________________________________________________ */
static bool parse_symbol(alpha) /* */
register int alpha; /* */
{ register Uchar c; /* */
register String cp; /* */
/* */
c = GetC; /* */
cp = flp-1; /* */
if (alpha && (! is_alpha(c))) /* */
{ Warning("Symbol does not start with a letter");/* */
} /* */
while (is_allowed(CurrentC)) { SkipC; } /* */
c = CurrentC; /* */
CurrentC = '\0'; /* */
push_string(symbol(lower(cp))); /* */
CurrentC = c; /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_key()
** Purpose: Parse a symbol and push it to the stack.
** Upon failure issue an appropriate message.
** Arguments:
** alpha indicator that the symbol has to start with an alpha character
** Returns: Success status
**___________________________________________________ */
static bool parse_key(alpha) /* */
register int alpha; /* */
{ register Uchar c; /* */
register String cp; /* */
Symbol name; /* */
/* */
c = GetC; /* */
cp = flp - 1; /* */
if (alpha && (! is_alpha(c))) /* */
{ Error("Key does not start with a letter"); /* */
return false; /* */
} /* */
while (is_allowed(CurrentC) || CurrentC == '\'')/* */
{ SkipC; } /* */
c = CurrentC; /* */
CurrentC = '\0'; /* */
if (rsc_key_case) /* */
{ Symbol val; /* */
val = symbol(cp); /* */
name = symbol(lower(cp)); /* */
save_key(name, val); /* */
} /* */
else /* */
{ name = symbol(lower(cp)); /* */
} /* */
push_string(name); /* */
CurrentC = c; /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_number()
** Purpose: Parse a number and push it to the stack.
** This function is called when at least one digit has been seen.
** Thus no error can occur in this function.
** Arguments: none
** Returns: nothing
**___________________________________________________ */
static void parse_number() /* */
{ register Uchar c; /* */
register String cp; /* */
/* */
cp = flp; /* */
while (is_digit(CurrentC)) { SkipC; } /* */
c = CurrentC; /* */
CurrentC = '\0'; /* */
push_string(symbol(cp)); /* */
CurrentC = c; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_string()
** Purpose: Parse a string and push it to the stack.
** A string is something enclosed in ""
** Consider the brace level to determine the end of the string.
** Arguments:
** quotep Boolean. |true| iff the leading " has already been stripped
** off the input stream.
** Returns: Success status
**___________________________________________________" */
static bool parse_string(quotep) /* */
int quotep; /* */
{ int c; /* */
int left; /* */
int start_flno = flno; /* */
/* */
left = 0; /* */
if (quotep) (void)sbputchar('"', parse_sb); /*" */
do /* */
{ switch (c=skip_nl()) /* */
{ case EOF: /* */
UnterminatedError("Unterminated double quote",/* */
start_flno); /* */
return false; /* */
case '{': left++; (void)sbputchar((char)c,parse_sb); break;/* */
case '}': if (left-- < 0) /* */
{ Warning("Expecting \" here"); } /* */
(void)sbputchar((char)c,parse_sb);/* */
break; /* */
case '\\': (void)sbputchar((char)c,parse_sb); c = NextC;/* */
(void)sbputchar((char)c,parse_sb); c = ' ';/* */
break; /* */
case '"': if (!quotep) break; /* */
default: (void)sbputchar((char)c,parse_sb);/* */
} /* */
} while (c != '"'); /* */
/* */
if (left) Warning("Unbalanced parenthesis"); /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_block()
** Purpose: Parse a block and push it to the stack.
** A block is something enclosed in {}
** Consider the brace level to determine the end of the string.
** Arguments:
** quotep Boolean. |true| iff the leading { has already been stripped off
** the input stream.
** Returns: Success status
**___________________________________________________ */
static bool parse_block(quotep) /* */
bool quotep; /* */
{ int c; /* */
int left; /* */
int start_flno = flno; /* */
/* */
left = 1; /* */
if (quotep) (void)sbputchar('{',parse_sb); /* */
/* */
FOREVER /* */
{ switch (c = skip_nl()) /* */
{ case EOF: /* */
UnterminatedError("Unterminated open brace",/* */
start_flno); /* */
return false; /* */
case '{': left++; break; /* */
case '}': /* */
if (--left < 1) /* */
{ if (quotep) (void)sbputchar('}', /* */
parse_sb); /* */
return true; /* */
} /* */
} /* */
(void)sbputchar(c, parse_sb); /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_rhs()
** Purpose: Parse the right hand side of an item.
** This can be composed of strings, blocks, numbers, and symbols
** separated by #
** Arguments: none
** Returns: Success status
**___________________________________________________ */
static bool parse_rhs() /* */
{ int start_flno = flno; /* */
Symbol sym; /* */
/* */
sbrewind(parse_sb); /* */
do /* */
{ if (sbtell(parse_sb) != 0) /* */
{ (void)sbputs(" # ", parse_sb); } /* */
/* */
switch (GetC) /* */
{ case EOF: /* */
UnterminatedError("Unterminated value", /* */
start_flno); /* */
return false; /* */
/* */
case '"': /* */
if (!parse_string(true)) return false; /* */
break; /* */
/* */
case '{': /* */
if (!parse_block(true)) return false; /* */
break; /* */
/* */
case '0': case '1': case '2': case '3': case '4':/* */
case '5': case '6': case '7': case '8': case '9':/* */
UnGetC; /* */
parse_number(); /* */
sym = pop_string(); /* */
(void)sbputs((char*)SymbolValue(sym), /* */
parse_sb); /* */
break; /* */
/* */
default: /* */
UnGetC; /* */
ExpectSymbol(true, false); /* */
{ sym = pop_string(); /* */
#ifdef OLD
(void)look_macro(mac,1); /* */
#endif
(void)sbputs((char*)SymbolValue(sym), /* */
parse_sb); /* */
} /* */
} /* */
} while (GetC == '#'); /* */
/* */
push_string(symbol((String)sbflush(parse_sb))); /* */
sbrewind(parse_sb); /* */
UnGetC; /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_equation()
** Purpose: Parse a pair separated by an equals sign.
** Arguments:
** rec The record to store the result in
** Returns: Success status
**___________________________________________________ */
static bool parse_equation(rec) /* */
Record rec; /* */
{ Symbol s, t; /* */
/* */
ExpectSymbol(true, false); /* */
Expect('=', false); /* */
ExpectRhs(false); /* */
/* */
t = pop_string(); /* */
s = pop_string(); /* */
push_to_record(rec, s, t); /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: parse_bib()
** Purpose: Read one entry and fill the internal record structure.
** Return the type of the entry read.
**
** |BIB_EOF| is returned if nothing could be read and
** the end of the file has been encountered.
**
** |BIB_NOOP| is returned when an error has occurred. This is
** an indicator that no record has been read but the
** error recovery is ready to try it again.
**
** This function is for internal purposes mainly. See
** |read_db()| for a higher level function to read a
** database.
** Arguments:
** rec Record to store the result in.
** Returns: The type of the entry read, |BIB_EOF|, or |BIB_NOOP|.
**___________________________________________________ */
int parse_bib(rec) /* */
Record rec; /* */
{ register rec_type type; /* */
register int n, /* */
c; /* */
bool again; /* */
long ignored = 0L; /* */
char *name; /* */
int line; /* */
char buffer[32]; /* */
static StringBuffer * comment_sb = (StringBuffer*)NULL;/* */
/* */
if (file == NULL) return BIB_EOF; /* */
if (comment_sb == (StringBuffer*)NULL) /* */
{ comment_sb = sbopen(); } /* */
/* */
RecordOldKey(rec) = NULL; /* */
RecordFree(rec) = 0; /* */
RecordComment(rec) = sym_empty; /* */
/* */
do /* */
{ init_parse(); /* */
/* */
while ((c=skip_c()) != '@') /* Skip to next @ */
{ if (c == EOF) /* */
{ char *s, *t; /* */
if (ignored == 0) return BIB_EOF; /* */
RecordType(rec) = BIB_COMMENT; /* */
/* */
s = t = sbflush(comment_sb); /* */
while (*s) s++; /* */
while (t <= --s && is_space(*s)) *s = '\0';/* */
if (*t) /* */
RecordComment(rec) = symbol((String)t); /* */
sbrewind(comment_sb); /* */
return BIB_COMMENT; /* */
} /* */
if (!is_space(c)) ++ignored; /* */
if (ignored > 0 && rsc_pass_comment) /* */
{ sbputchar(c, comment_sb); } /* */
} /* */
/* */
if (ignored != 0L) /* */
{ if (rsc_pass_comment) /* */
{ sbputchar('\n', comment_sb); } /* */
else /* */
{ (void)sprintf(buffer,"%ld",ignored); /* */
error(ERR_WARN|ERR_FILE, (String)buffer, /* */
(String)" non-space characters ignored.",/* */
StringNULL,StringNULL,StringNULL, /* */
flno, filename); /* */
} /* */
} /* */
DebugPrint2("Look-up type ", flp); /* */
/* */
if ((type=find_entry_type(flp)) == BIB_NOOP) /* */
{ Error("Unknown entry type"); /* */
return BIB_NOOP; /* */
} /* */
/* */
flp += symlen(EntryName(type)); /* */
/* */
if (type == BIB_COMMENT && rsc_pass_comment) /* */
{ sbputchar('@', comment_sb); /* */
sbputs((char*)SymbolValue(EntryName(type)), /* */
comment_sb); /* */
} /* */
} while (type == BIB_COMMENT); /* */
/* */
c = GetC; /* */
if (c != '{' && c != '(') /* */
{ Error("Expected '{' or '(' missing"); /* */
return BIB_NOOP; /* */
} /* */
line = flno; /* */
name = filename; /* */
/* */
RecordType(rec) = type; /* */
/* */
switch (type) /* */
{ case BIB_COMMENT: /* This code is not used */
UnGetC; /* any more. */
(void)parse_rhs(); /* */
push_to_record(rec, pop_string(), /* */
NO_SYMBOL); /* */
return type; /* */
/* */
case BIB_PREAMBLE: /* */
ExpectRhs(BIB_NOOP); /* */
push_to_record(rec, pop_string(), /* */
NO_SYMBOL); /* */
break; /* */
/* */
case BIB_STRING: /* */
ExpectEqMac(rec, BIB_NOOP); /* */
break; /* */
/* */
case BIB_ALIAS: /* */
ExpectEq(rec, BIB_NOOP); /* */
break; /* */
/* */
case BIB_INCLUDE: /* */
ExpectRhs(BIB_NOOP); /* */
push_to_record(rec, pop_string(), /* */
NO_SYMBOL); /* */
break; /* */
/* */
case BIB_MODIFY: /* */
default: /* */
if (TestC == ',') /* */
{ Warning("Missing reference key"); /* */
push_to_record(rec, sym_empty, /* */
NO_SYMBOL); /* */
(void)GetC; /* */
} /* */
else /* */
{ ExpectKey(false, BIB_NOOP); /* */
Expect(',', BIB_NOOP); /* */
push_to_record(rec, pop_string(), /* */
NO_SYMBOL); /* */
} /* */
/* */
do /* */
{ ExpectEq(rec, BIB_NOOP); /* */
for (n = 0; GetC == ','; n++) /* */
{ if (n == 1) /* */
{ Warning("Multiple ',' ignored."); } /* */
} /* */
UnGetC; /* */
switch (TestC) /* */
{ case EOF: /* */
case '}': /* */
case ')': again = false; break; /* */
default: again = true; /* */
if (n == 0) /* */
{ Warning("Missing ',' assumed."); } /* */
} /* */
} while (again); /* */
} /* */
/* */
switch (GetC) /* */
{ case '}': /* */
if(c != '{') /* */
{ Warning("Parenthesis '(' closed by '}'"); }/* */
break; /* */
case ')': /* */
if(c != '(') /* */
{ Warning("Parenthesis '{' closed by ')'"); }/* */
break; /* */
case EOF: /* */
{ String s; /* */
if (c == '{') { s = (String)"'{'"; } /* */
else { s = (String)"'('"; } /* */
error(ERR_ERROR|ERR_FILE, s, /* */
(String)" not closed at end of file.",/* */
StringNULL,StringNULL,StringNULL, /* */
line,name); /* */
} /* */
break; /* */
default: /* */
{ String s; /* */
if (c == '{') { s = (String)"'{'"; } /* */
else { s = (String)"'('"; } /* */
error(ERR_ERROR|ERR_FILE, /* */
s, /* */
(String)" not properly terminated.", /* */
StringNULL, StringNULL, StringNULL, /* */
line,name); /* */
} /* */
return BIB_NOOP; /* */
} /* */
/* */
{ String s, t; /* */
s = t = (String)sbflush(comment_sb); /* */
while (*s) s++; /* */
while (t <= --s && is_space(*s)) *s = '\0'; /* */
if (*t) RecordComment(rec) = symbol(t); /* */
} /* */
sbrewind(comment_sb); /* */
return type; /* */
} /*------------------------*/
/*****************************************************************************/
/* */
/*****************************************************************************/
static char **r_path = (char**)0;
static char *r_pattern[] =
{ "%s/%s", "%s/%s.rsc", NULL };
/*-----------------------------------------------------------------------------
** Function: set_rsc_path()
** Purpose: Initialize the resource file reading apparatus.
** Primarily try to figure out the file search path.
** Arguments:
** val The string representation of the file search path.
** Returns: nothing
**___________________________________________________ */
void set_rsc_path(val) /* */
String val; /* */
{ /* */
rsc_v_rsc = val; /* */
init___(&r_path, /* */
r_pattern, /* */
(char**)&rsc_v_rsc, /* */
(char*)rsc_e_rsc); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: see_rsc()
** Purpose: Open a rsc file to read from. The resource file path
** and the optional extensions are used to construct the
** full file name.
** Arguments:
** fname The file name to take into account.
** Returns: |true| iff the operation succeeds.
**___________________________________________________ */
static bool see_rsc(fname) /* */
String fname; /* */
{ /* */
if (fname == StringNULL) return false; /* */
/* */
init_parse(); /* */
InitLine; /* */
file = px_fopen((char*)fname, /* */
"r", /* */
r_pattern, /* */
r_path, /* */
see_bib_msg); /* */
filename = px_filename; /* */
return (file != NULL); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: parse_value()
** Purpose:
**
**
** Arguments: none
** Returns:
**___________________________________________________ */
static bool parse_value() /* */
{ int start_flno = flno; /* */
/* */
sbrewind(parse_sb); /* */
switch (GetC) /* */
{ case EOF: /* */
UnterminatedError("Unterminated value", /* */
start_flno); /* */
return false; /* */
/* */
case '"': /* */
if (!parse_string(false)) return false; /* */
push_string(symbol((String)sbflush(parse_sb)));/* */
sbrewind(parse_sb); /* */
break; /* */
/* */
case '0': case '1': case '2': case '3': case '4':/* */
case '5': case '6': case '7': case '8': case '9':/* */
UnGetC; parse_number(); /* */
break; /* */
/* */
case '{': /* */
if (!parse_block(false)) return false; /* */
push_string(symbol((String)sbflush(parse_sb)));/* */
sbrewind(parse_sb); /* */
break; /* */
/* */
default: /* */
UnGetC; ExpectSymbol(true, false); /* */
} /* */
/* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: read_rsc()
** Purpose: Read a resource file and evaluate all instructions
** contained.
**
** The characters |#|, |%|, and |;| start an endline
** comment but only between resource instructions. They
** are not recognized between a resource instruction
** and its value or inside the value braces.
**
** This function is contained in this module because it
** shares several functions with the \BibTeX{} parsing
** routines.
** Arguments:
** name Name of the file to read from.
** Returns: |true| if an error has occured
**___________________________________________________ */
bool read_rsc(name) /* */
String name; /* */
{ int c; /* */
Symbol token; /* */
char *s_filename; /* */
FILE *s_file; /* */
String s_file_line_buffer; /* */
size_t s_fl_size; /* */
int s_flno; /* */
String s_flp; /* */
bool ret; /* */
/* Save the old state in */
/* local variables to */
/* restore it later. */
s_filename = filename; /* */
s_file = file; /* */
s_file_line_buffer = file_line_buffer; /* */
s_fl_size = fl_size; /* */
s_flno = flno; /* */
s_flp = flp; /* */
/* */
fl_size = 0; /* */
/* */
init_parse(); /* */
/* */
if (see_rsc(name)) /* */
{ /* */
while ((c=TestC) != EOF) /* */
{ switch (c) /* */
{ case '#': case '%': case ';': /* */
ClearLine; break; /* */
default: /* */
if (!parse_symbol(c)) /* */
{ (void)seen(); /* */
return true; /* */
} /* */
token = pop_string(); /* */
if (TestC == '=') (void)GetC; /* = is optional */
if (!parse_value()) /* */
{ (void)seen(); /* */
return true; /* */
} /* */
(void)set_rsc(token, pop_string()); /* */
} /* */
} /* */
(void)seen(); /* */
ret = true; /* */
} /* */
else /* */
{ ret = false; /* */
} /* */
if (fl_size > 0) /* */
{ free((char*)file_line_buffer); /* */
} /* */
filename = s_filename; /* */
file = s_file; /* */
file_line_buffer = s_file_line_buffer; /* */
fl_size = s_fl_size; /* */
flno = s_flno; /* */
flp = s_flp; /* */
/* */
return ret; /* */
} /*------------------------*/
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