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rewrite.c
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/*** rewrite.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: [email protected]
**
** 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/entry.h>
#include <bibtool/error.h>
#include <bibtool/macros.h>
#include <bibtool/rsc.h>
#include <bibtool/key.h>
#include <bibtool/s_parse.h>
#include <bibtool/sbuffer.h>
#include <bibtool/rewrite.h>
#include <bibtool/symbols.h>
#ifdef REGEX
#include <bibtool/regex.h>
#endif
typedef struct rULE
{ Symbol rr_field;
Symbol rr_goal;
Symbol rr_value;
Symbol rr_frame;
int rr_flag;
struct rULE *rr_next;
#ifdef REGEX
struct re_pattern_buffer rr_pat_buff;
#endif
} SRule, *Rule;
#define RuleNULL (Rule)0
#define RuleField(X) ((X)->rr_field)
#define RuleGoal(X) ((X)->rr_goal)
#define RuleValue(X) ((X)->rr_value)
#define RulePattern(X) ((X)->rr_pat_buff)
#define RuleFrame(X) ((X)->rr_frame)
#define NextRule(X) ((X)->rr_next)
#define RuleFlag(X) ((X)->rr_flag)
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
#ifdef __STDC__
#define _ARG(A) A
#else
#define _ARG(A) ()
#endif
bool is_selected _ARG((DB db,Record rec)); /* */
int set_regex_syntax _ARG((char* name)); /* */
static Rule new_rule _ARG((Symbol field,Symbol value,Symbol pattern,Symbol frame,int flags,int casep));
static String check_regex _ARG((Symbol field,Symbol value,Rule rule,DB db,Record rec));
static String repl_regex _ARG((Symbol field,Symbol value,Rule rule,DB db,Record rec));
static bool s_match _ARG((String p,String s)); /* */
static bool s_search _ARG((String pattern,String s));/* */
static void add_rule _ARG((String s,Rule *rp,Rule *rp_end,int flags,int casep));
#ifdef UNUSED
static void free_rule _ARG((Rule rule)); /* */
#endif
static void init_s_search _ARG((String ignored));/* */
static void rewrite_1 _ARG((String frame,StringBuffer *sb,String match,DB db,Record rec));/**/
void add_check_rule _ARG((String s,int flags)); /* */
void add_extract _ARG((Symbol s,int regexp,int notp));/* */
void add_field _ARG((String spec)); /* */
void add_rewrite_rule _ARG((String s)); /* */
void clear_addlist _ARG((void)); /* */
void remove_field _ARG((Symbol field,Record rec));/* */
void rename_field _ARG((Symbol spec)); /* */
void rewrite_record _ARG((DB db,Record rec)); /* */
void save_regex _ARG((String s)); /* */
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*---------------------------------------------------------------------------*/
static String s_if = (String)"if";
static Rule match = RuleNULL;
/*****************************************************************************/
/*** Field Add/Delete Section ***/
/*****************************************************************************/
static Macro addlist = MacroNULL;
/*-----------------------------------------------------------------------------
** Function: clear_addlist()
** Purpose: Reset the addlist to the empty list.
** Arguments: none
** Returns: nothing
**___________________________________________________ */
void clear_addlist() /* */
{ /* */
free_macro(addlist); /* */
addlist = MacroNULL; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: foreach_addlist()
** Type: bool
** Purpose: Apply a function for every entry in the |addlist|.
** If the function returns |false| then the iteration is
** terminated immediately and |false| returned. Otherwise
** |true| is returned after all entries have been visited.
** Arguments:
** fct the function to be applied
** Returns: the termination indicator
**___________________________________________________ */
bool foreach_addlist(fct) /* */
bool (*fct) _ARG((Symbol key, Symbol val)); /* */
{ return each_macro(addlist, fct); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: add_field()
** Purpose: Save a token and value for addition.
** Arguments:
** spec A string of the form
** | token=value|
** Returns: nothing
**___________________________________________________ */
void add_field(spec) /* */
String spec; /* */
{ register Symbol field, value; /* */
/* */
sp_open(spec); /* */
if ((field = SParseSymbol(&spec)) == NO_SYMBOL) /* */
return; /* */
sp_skip(&spec); /* */
if ((value=SParseValue(&spec)) == NO_SYMBOL) /* */
return; /* */
sp_eos(&spec); /* */
/* */
addlist = new_macro(field, value, addlist, 0); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: remove_field()
** Purpose: Remove the given field from record.
** Arguments:
** field This is a symbol containing the name of the field to remove.
** rec Record in which the field should be removed.
** Returns: nothing
**___________________________________________________ */
void remove_field(field, rec) /* */
register Symbol field; /* */
Record rec; /* */
{ register int i; /* */
/* */
for (i = 0; i < RecordFree(rec); i += 2 ) /* */
{ if ( field == RecordHeap(rec)[i] ) /* compare symbols */
{ RecordHeap(rec)[i] = NO_SYMBOL; } /* */
} /* */
/* */
while ( RecordFree(rec) > 0 && /* Adjust Heap Length */
RecordHeap(rec)[RecordFree(rec) - 2] == NULL )/* */
{ RecordFree(rec) -= 2; /* */
} /* */
} /*------------------------*/
/*****************************************************************************/
/*** Rule Section ***/
/*****************************************************************************/
#ifdef REGEX
static struct re_registers reg; /* */
#endif
/*-----------------------------------------------------------------------------
** Function*: new_rule()
** Purpose: Allocate a new Rule and fill some slots.
** Arguments:
** field The field to apply this rule to, or |NULL| for each field.
** value the value
** pattern the rule goal
** frame the rule frame
** flags The ored flag values
** casep Boolean; indicating case sensitive comparison.
** Returns: A pointer to the allocated structure or |NULL| upon failure.
**___________________________________________________ */
static Rule new_rule(field, value, pattern, frame, flags, casep)/* */
Symbol field; /* */
Symbol value; /* */
Symbol pattern; /* */
Symbol frame; /* */
int flags; /* */
int casep; /* */
{ register Rule rule; /* */
static int init = 1; /* */
/* */
#ifdef REGEX
if ( init ) /* */
{ init = 0; /* */
reg.num_regs = 32; /* */
reg.start = (regoff_t*)calloc(32,sizeof(regoff_t));/* */
reg.end = (regoff_t*)calloc(32,sizeof(regoff_t));/* */
if ( reg.start == NULL || reg.end == NULL ) /* */
{ OUT_OF_MEMORY("rewrite rule"); } /* */
} /* */
#endif
/* */
if ( (rule=(Rule)malloc(sizeof(SRule))) == RuleNULL )/* */
{ OUT_OF_MEMORY("rewrite rule"); } /* */
/* */
RuleField(rule) = field; /* */
if (field) { LinkSymbol(field); } /* */
RuleValue(rule) = value; /* */
if (value) { LinkSymbol(value); } /* */
RuleFrame(rule) = frame; /* */
if (frame) { LinkSymbol(frame); } /* */
RuleFlag(rule) = flags; /* */
NextRule(rule) = RuleNULL; /* */
RuleGoal(rule) = pattern; /* */
if (pattern) { LinkSymbol(pattern); } /* */
/* */
#ifdef REGEX
if ( pattern && /* */
*SymbolValue(pattern) && /* */
(flags&RULE_REGEXP) ) /* */
{ char *msg; /* */
if ( (RulePattern(rule).buffer = (String)malloc(16)) == NULL )/* */
{ OUT_OF_MEMORY("pattern"); } /* */
RulePattern(rule).allocated = 16; /* */
RulePattern(rule).syntax = RE_SYNTAX_EMACS; /* */
RulePattern(rule).fastmap = NULL; /* */
RulePattern(rule).regs_allocated = REGS_FIXED; /* */
RulePattern(rule).translate = (casep /* */
? (char*)trans_lower/* */
: NULL); /* */
/* */
msg = (char*)re_compile_pattern((char*)SymbolValue(pattern),/* */
symlen(pattern),/* */
&RulePattern(rule) );/* */
if (msg) { /* */
Err(msg); /* */
free(rule); /* */
return NULL; /* */
} /* */
} /* */
else /* */
{ RuleFlag(rule) = (flags & ~RULE_REGEXP); /* */
} /* */
#endif
DebugPrint2("pattern = ", SymbolValue(pattern)); /* */
DebugPrint2("frame = ", SymbolValue(frame)); /* */
DebugPrintF1("+++ BibTool: flags ="); /* */
DebugPrintF1(flags & RULE_NOT ? " NOT" : ""); /* */
DebugPrintF1(flags & RULE_ADD ? " ADD" : ""); /* */
DebugPrintF1(flags & RULE_RENAME ? " RENAME" : "");/* */
DebugPrintF1(flags & RULE_DELETE ? " DELETE" : "");/* */
DebugPrintF1(flags & RULE_KEEP ? " KEEP" : ""); /* */
DebugPrintF1(flags & RULE_REGEXP ? " REGEXP" : "");/* */
DebugPrintF1("\n"); /* */
DebugPrintF2("+++ BibTool: New rule = %lx\n", /* */
(long)rule); /* */
/* */
return rule; /* */
} /*------------------------*/
#ifdef UNUSED
/*-----------------------------------------------------------------------------
** Function*: free_rule()
** Purpose: Free a list of rules.
** Arguments:
** rule First rule in the list.
** Returns: nothing
**___________________________________________________ */
static void free_rule(rule) /* */
Rule rule; /* */
{ Rule next; /* */
/* */
while (rule) /* */
{ next = NextRule(rule); /* */
#ifdef REGEX
free(RulePattern(rule).buffer); /* */
#endif
free(rule); /* */
rule = next; /* */
} /* */
} /*------------------------*/
#endif
/*-----------------------------------------------------------------------------
** Function*: add_rule()
** Purpose: Generic addition of a rule to a list of rules.
** Arguments:
** s the specification string
** rp the pointer to the first rule
** rp_end the pointer to the last rule
** flags the flags
** casep the indicator for cased matching
** Returns: nothing
**___________________________________________________ */
static void add_rule(s,rp,rp_end,flags,casep) /* */
String s; /* */
Rule *rp; /* */
Rule *rp_end; /* */
int flags; /* */
int casep; /* */
{ Symbol field; /* */
Symbol pattern; /* */
Symbol frame; /* */
Rule rule; /* */
int sp; /* */
int stackp; /* stack pointer for the */
static Symbol *stack; /* local stack of fields */
static int stacksize = 0; /* */
/* */
if ( stacksize == 0 ) /* */
{ stacksize++; /* */
if ((stack=(Symbol*)malloc(sizeof(Symbol)))==(Symbol*)NULL)/* */
{ OUT_OF_MEMORY("rule stack"); } /* */
} /* */
stackp = 0; /* */
/* */
DebugPrint2("Adding rule: Parsing from: ", s); /* */
sp_open(s); /* */
sp_skip(&s); /* */
/* */
while (*s && *s != '"') /* */
{ /* */
DebugPrint2("\tlooking for symbol in: ", s); /* */
field = SParseSymbol(&s); /* */
if (field == NO_SYMBOL) /* */
{ DebugPrint2("\tno symbol found in: ", s); /* */
return; /* */
} /* */
DebugPrint2("\tok ",s); /* */
DebugPrint2("field = ", SymbolValue(field)); /* */
sp_skip(&s); /* */
/* */
if (stackp >= stacksize) /* */
{ stacksize += 8; /* */
if ( (stack=(Symbol*)realloc((void*)stack, /* */
stacksize*sizeof(Symbol)))==NULL)/* */
{ OUT_OF_MEMORY("rule stack"); } /* */
} /* */
stack[stackp++] = field; /* */
} /* */
/* */
if ( *s == '\0' ) /* */
{ pattern = symbol((String)"."); } /* */
else if ( (pattern=SParseUnquotedString(&s)) == NO_SYMBOL )/* */
{ DebugPrintF1("No pattern found"); /* */
return; /* */
} /* */
/* */
sp_skip(&s); /* */
/* */
if (*s == '\0') /* */
{ frame = NO_SYMBOL; } /* */
else if ((frame=SParseUnquotedString(&s)) == NO_SYMBOL)/* */
{ return; } /* */
else /* */
{ sp_eos(&s); } /* */
/* */
if (stackp == 0) /* No field specified. */
{ rule = new_rule(NO_SYMBOL, /* */
NO_SYMBOL, /* */
pattern, /* */
frame, /* */
flags, /* */
casep); /* */
if ( *rp == RuleNULL ) /* */
{ *rp = *rp_end = rule; } /* */
else /* */
{ NextRule(*rp_end) = rule; *rp_end = rule;} /* */
return; /* */
} /* */
/* */
for (sp = 0; sp < stackp; sp++) /* */
{ rule = new_rule(stack[sp], /* */
NO_SYMBOL, /* */
pattern, /* */
frame, /* */
flags, /* */
casep); /* */
if ( *rp == RuleNULL ) /* */
{ *rp = *rp_end = rule; } /* */
else /* */
{ NextRule(*rp_end) = rule; *rp_end = rule;} /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: rewrite_1()
** Purpose:
**
**
** Arguments:
** frame
** sb
** match
** rec
** Returns: nothing
**___________________________________________________ */
static void rewrite_1(frame,sb,match,db,rec) /* */
String frame; /* */
StringBuffer *sb; /* */
String match; /* */
DB db; /* */
Record rec; /* */
{ /* */
for (; *frame; frame++) /* */
{ if (*frame == '%') /* */
{ frame = fmt_expand(sb, frame, db, rec); } /* */
else if (*frame != '\\') /* Transfer normal */
{ (void)sbputchar(*frame,sb); } /* characters. */
else /* */
{ /* */
switch (*++frame) /* */
{ case '1': case '2': case '3': /* */
case '4': case '5': case '6': /* */
case '7': case '8': case '9': /* */
#ifdef REGEX
{ int i = *frame - '0'; /* Look for register no */
int e = reg.end[i]; /* get end of match */
/* */
for (i = reg.start[i]; i < e; ++i) /* transfer from start */
{ (void)sbputchar(match[i],sb); } /* to end of match. */
} /* */
#endif
break; /* */
case '$': /* */
(void)sbputs((char*)SymbolValue(*RecordHeap(rec)),/* */
sb); /* */
break; /* */
case '@': /* */
(void)sbputs((char*)SymbolValue(EntryName(RecordType(rec))),/* */
sb); /* */
break; /* */
case 'n': /* */
(void)sbputchar('\n', sb); /* */
break; /* */
case 't': /* */
(void)sbputchar('\t', sb); /* */
break; /* */
default: /* */
if (*frame) (void)sbputchar(*frame,sb); /* Use '\\' as quote */
else --frame; /* or ignore at end of str*/
} /* */
} /* */
} /* */
} /*------------------------*/
#ifdef REGEX
/*-----------------------------------------------------------------------------
** Function*: selector_hits()
** Type: bool
** Purpose: Check whether a rule matches a given record.
**
** Arguments:
** rule the rule
** db the database
** rec the record
** Returns: |true| iff the rule applies
**___________________________________________________ */
static bool selector_hits(rule, db, rec) /* */
Rule rule; /* */
DB db; /* */
Record rec; /* */
{ Symbol field = RuleFrame(rule); /* */
Symbol value; /* */
int len; /* */
/* */
if (field == NO_SYMBOL) { return true; } /* */
/* */
value = get_field(db, rec, field); /* */
#ifdef REGEX
len = (value ? symlen(value) : 0) ; /* */
return (value && /* */
SymbolValue(value) && /* */
re_search(&RulePattern(rule), /* */
(char*)SymbolValue(value), /* */
len, /* */
0, /* */
len - 1, /* */
®) >= 0 ); /* */
#else
return true; /* */
#endif
} /*------------------------*/
#endif
/*-----------------------------------------------------------------------------
** Function*: repl_regex()
** Purpose:
**
**
** Arguments:
** field the field
** value the replacement value
** rule the rule
** db the database
** rec the record
** Returns: the result of the replacement
**___________________________________________________ */
static String repl_regex(field, value, rule, db, rec)/* */
Symbol field; /* */
Symbol value; /* */
Rule rule; /* */
DB db; /* */
Record rec; /* */
{ /* */
String val = SymbolValue(value); /* */
#ifdef REGEX
char c; /* */
int len; /* */
StringBuffer *sp; /* intermediate pointer */
bool once_more; /* */
int limit; /* depth counter to break */
/* out of infinite loops */
static StringBuffer *s1 = NULL; /* */
static StringBuffer *s2 = NULL; /* */
/* */
if (rule == RuleNULL) return val; /* */
/* */
if (s1 == NULL) { s1 = sbopen(); s2 = sbopen(); }/* */
else { sbrewind(s1); sbrewind(s2); }/* */
/* */
(void)sbputs((char*)val, s1); /* */
val = (String)sbflush(s1); /* */
len = strlen((char*)val); /* */
limit = rsc_rewrite_limit; /* */
once_more = true; /* */
/* */
while (once_more) /* */
{ /* */
once_more = false; /* */
while (rule) /* */
{ /* */
#ifdef DEBUG
printf("+++ BibTool: repl_regex rule:0x%lx flags:0x%x field:%s <> %s\n",
(long)rule, /* */
RuleFlag(rule), /* */
(char*)SymbolValue(RuleField(rule)), /* */
(char*)SymbolValue(field)); /* */
#endif
if ((RuleFlag(rule) & RULE_RENAME) != 0) /* */
{ /* */
if (RuleField(rule) == field && /* */
selector_hits(rule, db, rec)) /* */
{ int i; /* */
Symbol *hp; /* */
for (i = RecordFree(rec), hp = RecordHeap(rec);/* */
i > 0; /* */
i -= 2, hp += 2) /* */
{ /* */
if (*hp == field) /* */
{ field = *hp = RuleValue(rule); /* */
break; /* */
} /* */
} /* */
} /* */
rule = NextRule(rule); /* */
limit = rsc_rewrite_limit; /* */
} /* */
else if ((RuleField(rule) == NULL /* */
|| RuleField(rule) == field ) && /* */
(RuleFlag(rule) & RULE_ADD) == 0 && /* */
re_search(&RulePattern(rule), /* */
(char*)val, /* */
len, /* */
0, /* */
len - 1, /* */
®) >= 0 ) /* */
{ /* */
if (--limit < 0) /* */
{ ErrPrintF2("\n*** BibTool WARNING: Rewrite limit exceeded for field %s\n\t\t in record %s\n",
(char*)SymbolValue(field), /* */
(*RecordHeap(rec) /* */
? (char*)SymbolValue(*RecordHeap(rec))/* */
: "") ); /* */
once_more = false; /* */
break; /* */
} /* */
if (RuleFrame(rule) == NO_SYMBOL) /* */
{ return StringNULL; } /* */
/* */
if (reg.start[0] > 0) /* */
{ c = val[reg.start[0]]; /* Push initial segment */
val[reg.start[0]] = '\0'; /* */
(void)sbputs((char*)val, s2); /* */
val[reg.start[0]] = c; /* */
} /* */
/* */
rewrite_1(SymbolValue(RuleFrame(rule)), /* */
s2, /* */
val, /* */
db, /* */
rec); /* */
(void)sbputs((char*)(val+reg.end[0]), s2); /* Transfer the end. */
/* */
val = (String)sbflush(s2); /* update the value */
len = strlen((char*)val); /* and its length */
sp = s1; s1 = s2; s2 = sp; /* rotate the two string */
sbrewind(s2); /* buffers and reset */
/* the destination. */
once_more = true; /* */
} /* */
else /* */
{ rule = NextRule(rule); /* */
limit = rsc_rewrite_limit; /* */
} /* */
} /* */
} /* */
#endif
return val; /* return the result. */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: check_regex()
** Purpose:
**
** Arguments:
** field the field
** value the value
** rule the rule
** rec the record
** Returns:
**___________________________________________________ */
static String check_regex(field, value, rule, db, rec)/* */
Symbol field; /* */
Symbol value; /* */
register Rule rule; /* */
DB db; /* */
Record rec; /* */
{ /* */
#ifdef REGEX
int len; /* */
static StringBuffer *s2 = 0L; /* */
/* */
if (rule == RuleNULL) /* */
{ match = RuleNULL; /* */
return SymbolValue(value); /* */
} /* */
/* */
if ( s2 == NULL ) { s2 = sbopen(); } /* */
else { sbrewind(s2); } /* */
/* */
for ( len = symlen(value); /* Loop through all rules */
rule != RuleNULL; /* */
rule = NextRule(rule) ) /* */
{ if ( ( RuleField(rule) == NO_SYMBOL /* */
|| RuleField(rule) == field ) /* */
&& /* */
( (RuleFlag(rule)&RULE_REGEXP) == 0 /* */
|| re_search(&RulePattern(rule), /* */
(char*)SymbolValue(value), /* */
len,0,len-1,®) >=0 /* */
) /* */
) /* */
{ if ( RuleFrame(rule) == NO_SYMBOL ) /* */
{ match = RuleNULL; /* */
return StringNULL; /* */
} /* */
rewrite_1(SymbolValue(RuleFrame(rule)), /* */
s2, /* */
SymbolValue(value), /* */
db, /* */
rec); /* */
match = rule; /* */
return (String)sbflush(s2); /* TODO: update the value?*/
} /* */
} /* */
#endif
match = RuleNULL; /* */
return StringNULL; /* return the result. */
} /*------------------------*/
/*---------------------------------------------------------------------------*/
/*--- Rewrite Rule Section ---*/
/*---------------------------------------------------------------------------*/
static Rule r_rule = RuleNULL;
static Rule r_rule_end = RuleNULL;
/*-----------------------------------------------------------------------------
** Function: rename_field()
** Type: void
** Purpose: Parse a specification for renaming a field and add an
** appropriate rule.
** Arguments:
** spec the argument
** Returns: nothing
**___________________________________________________ */
void rename_field(spec) /* */
Symbol spec; /* */
{ String s = SymbolValue(spec); /* */
Symbol from; /* */
Symbol to; /* */
Symbol field = NO_SYMBOL; /* */
Symbol pattern = NO_SYMBOL; /* */
/* */
sp_open(s); /* */
sp_skip(&s); /* */
if ((from = SParseSymbol(&s)) == NO_SYMBOL) /* */
return; /* */
sp_skip(&s); /* */
if ((to = SParseSymbol(&s)) == NO_SYMBOL) /* */
return; /* */
/* */
if (sp_expect(&s, s_if, false)) /* */
{ if ((field = SParseOptionalSymbol(&s)) != NO_SYMBOL)/* */
{ sp_skip(&s); /* */
if ((pattern = SParseValue(&s)) == NO_SYMBOL)/* */
{ if (to) UnlinkSymbol(to); /* */
if (from) UnlinkSymbol(from); /* */
if (field) UnlinkSymbol(field); /* */
return; /* */
} /* */
} /* */
} /* */
if (sp_eos(&s) != StringNULL ) /* */
{ if (to) UnlinkSymbol(to); /* */
if (from) UnlinkSymbol(from); /* */
if (field) UnlinkSymbol(field); /* */
if (pattern) UnlinkSymbol(pattern); /* */
return; /* */
} /* */
/* */
Rule rule = new_rule(from, /* */
to, /* */
pattern, /* */
field, /* */
RULE_RENAME | RULE_REGEXP, /* */
rsc_case_rewrite); /* */
if (r_rule == RuleNULL) /* */
{ r_rule = r_rule_end = rule; /* */
} /* */
else /* */
{ NextRule(r_rule_end) = rule; /* */
r_rule_end = rule; /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: add_rewrite_rule()
** Purpose: Save a rewrite rule for later use.
** The main task is performed by |add_rule()|.
** Arguments:
** s Rule to save
** Returns: nothing
**___________________________________________________ */
void add_rewrite_rule(s) /* */
String s; /* */
{ /* */
DebugPrintF1("add rewrite rule\n"); /* */
/* */
add_rule(s, /* */
&r_rule, /* */
&r_rule_end, /* */
RULE_REGEXP, /* */
rsc_case_rewrite); /* */
} /*------------------------*/
/*---------------------------------------------------------------------------*/
/*--- Keep Rule Section ---*/
/*---------------------------------------------------------------------------*/
#define K_RULES_SIZE 37
static Rule *k_rules = (Rule*)NULL;
/*-----------------------------------------------------------------------------
** Function: keep_field()
** Type: void
** Purpose: Parse the sepcification for keeping a field.
**
** Arguments:
** spec the specification
** Returns: nothing
**___________________________________________________ */
void keep_field(spec) /* */
Symbol spec; /* */
{ String s = SymbolValue(spec); /* */
Symbol* names; /* */
Symbol* np; /* */
Symbol field = NO_SYMBOL; /* */
Symbol pattern = NO_SYMBOL; /* */
intptr_t i; /* */
/* */
sp_open(s); /* */
if ((names = sp_symbols(&s)) == NULL) /* */
return; /* */
/* */
if (sp_expect(&s, s_if, false)) /* */
{ if ((field = SParseOptionalSymbol(&s)) != NO_SYMBOL)/* */
{ sp_skip(&s); /* */
if ((pattern = SParseValue(&s)) == NO_SYMBOL)/* */
{ free_sym_array(names); /* */
UnlinkSymbol(field); /* */
return; /* */
} /* */
} /* */
else /* */
{ free_sym_array(names); /* */
return; /* */
} /* */
} /* */
if (sp_eos(&s) != StringNULL ) /* */
{ free_sym_array(names); /* */
if (field) UnlinkSymbol(field); /* */
if (pattern) UnlinkSymbol(pattern); /* */
return; /* */
} /* */
/* */
if (k_rules == NULL) /* */
{ if ((k_rules=calloc(K_RULES_SIZE, sizeof(Rule))) == NULL)/* */
{ OUT_OF_MEMORY("keep rules"); } /* */
} /* */
/* */
for (np = names; *np; np++) /* */
{ LinkSymbol(*np); /* */
Rule rule = new_rule(*np, /* */
NULL, /* */
pattern, /* */
field, /* */
RULE_KEEP | RULE_REGEXP, /* */
true); /* */
i = (intptr_t)(*np) % K_RULES_SIZE; /* */
if (i < 0) i = -i; /* */
/* */
NextRule(rule) = k_rules[i]; /* */
k_rules[i] = rule; /* */
} /* */
/* */
free_sym_array(names); /* */
} /*------------------------*/
/*---------------------------------------------------------------------------*/
/*--- Check Rule Section ---*/
/*---------------------------------------------------------------------------*/
static Rule c_rule = RuleNULL;
static Rule c_rule_end = RuleNULL;
/*-----------------------------------------------------------------------------
** Function: add_check_rule()
** Purpose: Save a check rule for later use.
** Arguments:
** s Rule to save.
** flags the additional rule flags
** Returns: nothing
**___________________________________________________ */
void add_check_rule(s,flags) /* */
String s; /* */
int flags; /* */
{ /* */
DebugPrintF1("add check rule\n"); /* */
add_rule(s, /* */
&c_rule, /* */
&c_rule_end, /* */
RULE_REGEXP|flags, /* */
rsc_case_check); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: dont_keep()
** Type: static bool
** Purpose:
**
** Arguments:
** sym the symbol
** rec the record
** db the database
** Returns:
**___________________________________________________ */
static bool dont_keep(sym,rec,db) /* */
Symbol sym; /* */
Record rec; /* */
DB db; /* */
{ Rule r; /* */
int idx = (int)((long)sym % K_RULES_SIZE); /* */
if (idx < 0) idx = -idx; /* */
/* */
for (r = k_rules[idx]; r; r = NextRule(r)) /* */
{ /* */
if (RuleField(r) == sym && /* */
selector_hits(r, db, rec)) /* */
{ return false; } /* */
} /* */
return true; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: rewrite_record()
** Purpose: Apply deletions, checks, additions, and rewriting steps
** in this order.
** Arguments:
** rec Actual record to apply things to.
** db The database record is belonging to.
** Returns: nothing
**___________________________________________________ */
void rewrite_record(db, rec) /* */
DB db; /* */
register Record rec; /* */
{ register int i; /* */
register Symbol *hp; /* heap pointer */
register Macro mac; /* */
String cp; /* */
static StringBuffer *sb = NULL; /* */
/* */
if (sb == NULL) sb = sbopen(); /* */
/* */
if (c_rule) /* */
{ /* */
for (i = RecordFree(rec), hp = RecordHeap(rec);/* */
i > 0; /* */
i -= 2, hp +=2) /* */
{ /* */
if ( *hp /* */
&& *(hp+1) /* */
&& StringNULL != /* */
(cp=check_regex(*hp, /* */
*(hp+1), /* */
c_rule, /* */
db, /* */
rec)) /* */
) /* */
{ ErrPrint("*** BibTool"); /* */
if (match) /* */
{ if (RuleFlag(match)&RULE_ERROR) /* */
{ ErrPrint(" ERROR"); } /* */
if (RuleFlag(match)&RULE_WARNING) /* */
{ ErrPrint(" WARNING"); } /* */
} /* */
err_location(RecordLineno(rec), /* */
RecordSource(rec), NULL); /* */
ErrPrintF(": %s\n", cp); /* */
} /* */
} /* */
} /* */
/* */
if (r_rule) /* Apply the rewrite rules*/
{ /* */
for (i = RecordFree(rec), hp = RecordHeap(rec);/* */
i > 0; /* */
i -= 2, hp += 2) /* */
{ /* */
if (*hp && *(hp+1)) /* */
{ /* */
cp = repl_regex(*hp,*(hp+1),r_rule,db,rec);/* */
if (cp == StringNULL) /* */
{ if (*hp) UnlinkSymbol(*hp); /* */
if (*(hp+1)) UnlinkSymbol(*(hp+1)); /* */
*hp = *(hp+1) = NO_SYMBOL; /* */
} /* */
else if (strcmp((char*)cp, /* */
(char*)SymbolValue(*(hp+1))))/* */
{ if (*(hp+1)) UnlinkSymbol(*(hp+1)); /* */
*(hp+1) = symbol(cp); /* */
} /* */
} /* */
} /* */
} /* */
/* */
if (k_rules) /* Apply all keep rules */
{ /* */
for (i = RecordFree(rec), hp = RecordHeap(rec);/* */
i > 0; /* */
i -= 2, hp += 2) /* */
{ /* */
if (*hp && /* */
*(hp+1) && /* */
dont_keep(sym_star, rec, db) && /* */
dont_keep(*hp, rec, db)) /* */
{ if (*hp) UnlinkSymbol(*hp); /* */
if (*(hp+1)) UnlinkSymbol(*(hp+1)); /* */