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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) 1996-2014 Gerd Neugebauer
**
** Net: gene@gerd-neugebauer.de
**
******************************************************************************/
#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>
#ifdef REGEX
#include <bibtool/regex.h>
#endif
typedef struct rULE
{ Uchar *rr_field;
Uchar *rr_goal;
Uchar *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 RulePattern(X) ((X)->rr_pat_buff)
#define RuleFrame(X) ((X)->rr_frame)
#define NextRule(X) ((X)->rr_next)
#define RuleFlag(X) ((X)->rr_flag)
#define RULE_NONE 0x00
#define RULE_ADD 0x01
#define RULE_REGEXP 0x02
#define RULE_NOT 0x04
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
#ifdef __STDC__
#define _ARG(A) A
#else
#define _ARG(A) ()
#endif
int is_selected _ARG((DB db,Record rec)); /* */
int set_regex_syntax _ARG((char* name)); /* */
static Rule new_rule _ARG((Uchar *field,Uchar *pattern,Uchar *frame,int flags,int casep));
static Uchar * check_regex _ARG((Uchar *field,Uchar *value,Rule rule,DB db,Record rec));
static Uchar * repl_regex _ARG((Uchar *field,Uchar *value,Rule rule,DB db,Record rec));
static int s_match _ARG((Uchar * p,Uchar * s)); /* */
static int s_search _ARG((Uchar * pattern,Uchar * s));/* */
static void add_rule _ARG((Uchar *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((Uchar * ignored));/* */
static void rewrite_1 _ARG((Uchar *frame,StringBuffer *sb,Uchar *match,DB db,Record rec));/**/
void add_check_rule _ARG((Uchar *s)); /* */
void add_extract _ARG((Uchar *s,int regexp,int notp));/* */
void add_field _ARG((Uchar *spec)); /* */
void add_rewrite_rule _ARG((Uchar *s)); /* */
void clear_addlist _ARG((void)); /* */
void remove_field _ARG((Uchar *field,Record rec));/* */
void rewrite_record _ARG((DB db,Record rec)); /* */
void save_regex _ARG((Uchar *s)); /* */
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*****************************************************************************/
/*** 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: 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) /* */
Uchar *spec; /* */
{ register Uchar *field, *value; /* */
/* */
(void)sp_open(spec); /* */
if ( (field = SParseSymbol(&spec)) == (Uchar*)NULL )/* */
return; /* */
(void)SParseSkip(&spec); /* */
if ( (value=SParseValue(&spec)) == (Uchar*)NULL )/* */
return; /* */
(void)SParseEOS(&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 Uchar *field; /* */
Record rec; /* */
{ register int i; /* */
/* */
for (i=0;i<RecordFree(rec);i+=2 ) /* */
{ if ( field == RecordHeap(rec)[i] ) /* compare symbols */
{ RecordHeap(rec)[i] = (Uchar*)NULL; } /* */
} /* */
/* */
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.
** pattern
** frame
** flags
** casep Boolean; indicating case sensitive comparison.
** Returns: A pointer to the allocated structure or |NULL| upon failure.
**___________________________________________________ */
static Rule new_rule(field,pattern,frame,flags,casep)/* */
Uchar *field; /* */
Uchar *pattern; /* */
Uchar *frame; /* */
int flags; /* */
int casep; /* */
{ register Rule new; /* */
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("rewite rule"); } /* */
} /* */
#endif
/* */
if ( (new=(Rule)malloc(sizeof(SRule))) == RuleNULL )/* */
{ OUT_OF_MEMORY("rewite rule"); } /* */
/* */
RuleField(new) = field; /* */
RuleFrame(new) = frame; /* */
RuleFlag(new) = flags; /* */
NextRule(new) = RuleNULL; /* */
RuleGoal(new) = pattern; /* */
/* */
#ifdef REGEX
if ( *pattern && (flags&RULE_REGEXP) ) /* */
{ char *msg; /* */
if ( (RulePattern(new).buffer = (unsigned char *)malloc(16)) == NULL )/* */
{ OUT_OF_MEMORY("pattern"); } /* */
RulePattern(new).allocated = 16; /* */
RulePattern(new).syntax = RE_SYNTAX_EMACS; /* */
RulePattern(new).translate = (casep?(char*)trans_lower:NULL);/* */
RulePattern(new).fastmap = NULL; /* */
RulePattern(new).regs_allocated = REGS_FIXED; /* */
/* */
msg = (char*)re_compile_pattern((char*)pattern,/* */
strlen((char*)pattern),/* */
&RulePattern(new) );/* */
/* */
if ( msg ) { /* */
Err(msg); /* */
free(new); /* */
return NULL; /* */
} /* */
} /* */
else /* */
{ /* */
RuleFlag(new) = (flags&~RULE_REGEXP); /* */
} /* */
#endif
return new; /* */
} /*------------------------*/
#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
** rp
** rp_end
** flags
** casep
** Returns: nothing
**___________________________________________________ */
static void add_rule(s,rp,rp_end,flags,casep) /* */
Uchar *s; /* */
Rule *rp; /* */
Rule *rp_end; /* */
int flags; /* */
int casep; /* */
{ Uchar *field; /* */
Uchar *pattern; /* */
Uchar *frame; /* */
Rule rule; /* */
int sp; /* */
int stackp; /* stack pointer for the */
static Uchar **stack; /* local stack of fields */
static int stacksize = 0; /* */
/* */
if ( stacksize == 0 ) /* */
{ stacksize++; /* */
if ((stack=(Uchar**)malloc(sizeof(Uchar*)))==(Uchar**)NULL)/* */
{ OUT_OF_MEMORY("rule stack"); } /* */
} /* */
stackp = 0; /* */
/* */
DebugPrint2("Adding rule: Parsing from: ",s); /* */
(void)sp_open(s); /* */
(void)SParseSkip(&s); /* */
/* */
while (*s && *s != '"') /* */
{
DebugPrint2("\tlooking for symbol in: ",s); /* */
field = SParseSymbol(&s); /* */
DebugPrint2("\tok ",s);
if ( field == NULL) /* */
{ /* */
DebugPrint2("\tno symbol found in: ",s); /* */
return; } /* */
DebugPrint1("\tok ");
DebugPrint2("field = ",field); /* */
(void)SParseSkip(&s); /* */
/* */
if ( stackp >= stacksize ) /* */
{ stacksize += 8; /* */
if ( (stack=(Uchar**)realloc((char*)stack, /* */
stacksize*sizeof(char*)))==NULL)/* */
{ OUT_OF_MEMORY("rule stack"); } /* */
} /* */
stack[stackp++] = field; /* */
} /* */
/* */
if ( *s == '\0' ) /* */
{ pattern = symbol((Uchar*)"."); } /* */
else if ( (pattern=SParseUnquotedString(&s)) == NULL )/* */
{ DebugPrintF1("No pattern found"); /* */
return; /* */
} /* */
/* */
DebugPrint2("pattern = ",pattern); /* */
(void)SParseSkip(&s); /* */
/* */
if ( *s == '\0' ) /* */
{ frame = (Uchar*)NULL; } /* */
else if ( (frame=SParseUnquotedString(&s)) == NULL )/* */
{ return; } /* */
else /* */
{ (void)SParseEOS(&s); } /* */
DebugPrint2("frame = ",frame); /* */
#ifdef DEBUG
DebugPrintF1("+++ BibTool: flags = "); /* */
if (flags & RULE_NOT) DebugPrintF1(" NOT"); /* */
if (flags & RULE_ADD) DebugPrintF1(" ADD"); /* */
if (flags & RULE_REGEXP) DebugPrintF1(" REGEXP"); /* */
DebugPrintF1("\n"); /* */
#endif
/* */
if ( stackp == 0 ) /* No field specified. */
{ rule = new_rule((Uchar*)0,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],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) /* */
Uchar *frame; /* */
StringBuffer *sb; /* */
Uchar *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*)*RecordHeap(rec),sb);/* */
break; /* */
case '@': /* */
(void)sbputs((char*)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*/
} /* */
} /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: repl_regex()
** Purpose:
**
**
** Arguments:
** field
** value
** rule
** rec
** Returns:
**___________________________________________________ */
static Uchar * repl_regex(field,value,rule,db,rec) /* */
Uchar *field; /* */
Uchar *value; /* */
Rule rule; /* */
DB db; /* */
Record rec; /* */
{ /* */
#ifdef REGEX
char c; /* */
int len; /* */
StringBuffer *sp; /* intermediate pointer */
int once_more; /* */
int limit; /* depth counter to break */
/* out of infinite loops */
static StringBuffer *s1 = 0L; /* */
static StringBuffer *s2 = 0L; /* */
/* */
if ( rule == RuleNULL ) return value; /* */
/* */
if ( s1 == NULL ) { s1 = sbopen(); s2 = sbopen(); }/* */
else { sbrewind(s1); sbrewind(s2); }/* */
/* */
(void)sbputs((char*)value,s1); /* */
value = (Uchar*)sbflush(s1); /* */
len = strlen((char*)value); /* */
limit = rsc_rewrite_limit; /* */
once_more = TRUE; /* */
/* */
while ( once_more ) /* */
{ /* */
once_more = FALSE; /* */
while ( rule != RuleNULL ) /* */
{ /* */
if ( ( RuleField(rule) == NULL /* */
|| RuleField(rule) == field ) && /* */
(RuleFlag(rule) & RULE_ADD) == 0 && /* */
re_search(&RulePattern(rule), /* */
(char*)value, /* */
len, /* */
0, /* */
len-1, /* */
®) >=0 ) /* */
{ /* */
if ( 0 > --limit ) /* */
{ ErrPrint("\n*** BibTool WARNING: Rewrite limit exceeded for field ");
ErrPrint((char*)field); /* */
ErrPrint("\n\t\t in record "); /* */
ErrPrint((*RecordHeap(rec)?(char*)*RecordHeap(rec):""));/* */
ErrPrint("\n"); /* */
once_more = FALSE; /* */
break; /* */
} /* */
if ( RuleFrame(rule) == (Uchar*)NULL ) /* */
{ return (Uchar*)NULL; } /* */
/* */
if ( reg.start[0] > 0 ) /* */
{ c = value[reg.start[0]]; /* Push initial segment */
value[reg.start[0]] = '\0'; /* */
(void)sbputs((char*)value, s2); /* */
value[reg.start[0]] = c; /* */
} /* */
/* */
rewrite_1(RuleFrame(rule),s2,value,db,rec);/* */
/* */
(void)sbputs((char*)(value+reg.end[0]),s2);/* Transfer the end. */
/* */
value = (Uchar*)sbflush(s2); /* update the value */
len = strlen((char*)value); /* 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 value; /* return the result. */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: check_regex()
** Purpose:
**
**
** Arguments:
** field
** value
** rule
** rec
** Returns:
**___________________________________________________ */
static Uchar * check_regex(field,value,rule,db,rec) /* */
Uchar *field; /* */
Uchar *value; /* */
Rule rule; /* */
DB db; /* */
Record rec; /* */
{ /* */
#ifdef REGEX
int len; /* */
static StringBuffer *s2 = 0L; /* */
/* */
if ( rule == RuleNULL ) return value; /* */
/* */
if ( s2 == NULL ) { s2 = sbopen(); } /* */
else { sbrewind(s2); } /* */
/* */
for ( len = strlen((char*)value); /* Loop through all rules */
rule != RuleNULL; /* */
rule = NextRule(rule) ) /* */
{ /* */
if ( ( RuleField(rule) == NULL /* */
|| RuleField(rule) == field ) /* */
&& /* */
( (RuleFlag(rule)&RULE_REGEXP) == 0 /* */
|| re_search(&RulePattern(rule), /* */
(char*)value, /* */
len,0,len-1,®) >=0 /* */
) /* */
) /* */
{ if ( RuleFrame(rule) == (Uchar*)NULL ) /* */
{ return (Uchar*)NULL; } /* */
rewrite_1(RuleFrame(rule),s2,value,db,rec); /* */
value = (Uchar*)sbflush(s2); /* update the value */
return value; /* */
} /* */
} /* */
#endif
return (Uchar*)NULL; /* return the result. */
} /*------------------------*/
/*---------------------------------------------------------------------------*/
static Rule r_rule = RuleNULL;
static Rule r_rule_end = RuleNULL;
/*-----------------------------------------------------------------------------
** 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) /* */
Uchar *s; /* */
{ /* */
add_rule(s, /* */
&r_rule, /* */
&r_rule_end, /* */
RULE_REGEXP, /* */
rsc_case_rewrite); /* */
} /*------------------------*/
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.
** Returns: nothing
**___________________________________________________ */
void add_check_rule(s) /* */
Uchar *s; /* */
{ /* */
add_rule(s, /* */
&c_rule, /* */
&c_rule_end, /* */
RULE_REGEXP, /* */
rsc_case_check); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** 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 Uchar **hp; /* heap pointer */
register Macro mac; /* */
Uchar *cp; /* */
static StringBuffer *sb = NULL; /* */
/* */
if ( sb == NULL ) sb = sbopen(); /* */
/* */
if ( c_rule != RuleNULL ) /* */
{ /* */
for ( i=RecordFree(rec), hp=RecordHeap(rec); /* */
i > 0; /* */
i-=2, hp +=2 ) /* */
{ /* */
if ( *hp /* */
&& *(hp+1) /* */
&& (Uchar*)NULL != /* */
(cp=check_regex(*hp,*(hp+1),c_rule,db,rec))/* */
) /* */
{ Err(cp); } /* */
} /* */
} /* */
/* */
if ( r_rule != RuleNULL ) /* */
{ /* */
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 == (Uchar*)NULL ) /* */
{ *hp = *(hp+1) = (Uchar*)NULL; } /* */
else if ( cp != *(hp+1) ) /* */
{ *(hp+1) = symbol(cp); } /* */
} /* */
} /* */
} /* */
/* */
for ( mac=addlist; /* Add all items in the */
mac; /* add list */
mac=NextMacro(mac) ) /* */
{ cp = MacroValue(mac); /* */
sbrewind(sb); /* */
sbputc('{',sb); /* */
while ( *cp ) /* */
{ /* */
if ( *cp == '%' ) /* */
{ if ( *(cp+1) == '%' ) /* */
{ sbputc(*cp,sb); cp+=2; } /* */
else { cp = fmt_expand(sb,cp,db,rec); } /* */
} /* */
else { sbputc(*cp,sb); cp++; } /* */
} /* */
sbputc('}',sb); /* */
push_to_record(rec, /* */
MacroName(mac), /* */
sym_add((Uchar*)sbflush(sb),1));/* */
} /* */
} /*------------------------*/
/*---------------------------------------------------------------------------*/
static Rule x_rule = RuleNULL;
static Rule x_rule_end = RuleNULL;
/*-----------------------------------------------------------------------------
** Function: add_extract()
** Purpose: Save an extraction rule for later use. The argument is
** interpreted as regular expression to be matched
** against the field value.
**
** The value of |rsc_case_select| at the invocation of
** this function determines whether the matching is
** performed case sensitive or not.
** Arguments:
** s Rule to save.
** regexp Boolean value indicating whether regular expressions
** should be used. If not set then plain string matching
** is performed.
** notp Boolean value indicating whether the result should be
** negated.
** Returns: nothing
**___________________________________________________ */
void add_extract(s,regexp,notp) /* */
Uchar *s; /* */
int regexp; /* */
int notp; /* */
{ /* */
add_rule(s, /* The main task is */
&x_rule, /* performed by */
&x_rule_end, /* |add_rule()|. */
(regexp?RULE_REGEXP:RULE_NONE) | /* */
(notp ?RULE_NOT :RULE_NONE) , /* */
!rsc_case_select); /* */
rsc_select = TRUE; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: save_regex()
** Purpose: Save an extraction rule for later use.
** Only the regular expression of the rule is given as argument.
** The fields are taken from the resource select.fields.
** Arguments:
** s Regular expression to search for.
** Returns: nothing
**___________________________________________________ */
void save_regex(s) /* */
Uchar *s; /* */
{ Uchar *t = malloc( (size_t)strlen((char*)s) /* */
+ (size_t)strlen((char*)rsc_sel_fields)/* */
+ 4 ); /* */
if ( t == NULL ) { OUT_OF_MEMORY("string"); } /* */
/* */
(void)strcpy((char*)t, (char*)rsc_sel_fields); /* */
(void)strcat((char*)t, " \""); /* */
(void)strcat((char*)t, (char*)s); /* */
(void)strcat((char*)t, "\""); /* */
/* */
add_rule(t, /* */
&x_rule, /* */
&x_rule_end, /* */
RULE_REGEXP, /* */
!rsc_case_select); /* */
/* */
free((char*)t); /* */
rsc_select = TRUE; /* */
} /*------------------------*/
static char s_class[256]; /* */
static Uchar *s_ignored = (Uchar*)NULL; /* */
static int s_cased = -33; /* */
/*-----------------------------------------------------------------------------
** Function: init_s_search()
** Purpose:
**
**
** Arguments:
** ignored
** Returns: Nothing
**___________________________________________________ */
static void init_s_search(ignored) /* */
Uchar * ignored; /* */
{ int i; /* */
for (i = 0; i < 256; i++) s_class[i] = i; /* */
/* */
if (!rsc_case_select) /* */
{ /* */
s_class['a'] = 'A'; /* */
s_class['b'] = 'B'; /* */
s_class['c'] = 'C'; /* */
s_class['d'] = 'D'; /* */
s_class['e'] = 'E'; /* */
s_class['f'] = 'F'; /* */
s_class['g'] = 'G'; /* */
s_class['h'] = 'H'; /* */
s_class['i'] = 'I'; /* */
s_class['j'] = 'J'; /* */
s_class['k'] = 'K'; /* */
s_class['l'] = 'L'; /* */
s_class['m'] = 'M'; /* */
s_class['n'] = 'N'; /* */
s_class['o'] = 'O'; /* */
s_class['p'] = 'P'; /* */
s_class['q'] = 'Q'; /* */
s_class['r'] = 'R'; /* */
s_class['s'] = 'S'; /* */
s_class['t'] = 'T'; /* */
s_class['u'] = 'U'; /* */
s_class['v'] = 'V'; /* */
s_class['w'] = 'W'; /* */
s_class['x'] = 'X'; /* */
s_class['y'] = 'Y'; /* */
s_class['z'] = 'Z'; /* */
} /* */
while ( *ignored ) /* */
{ s_class[(unsigned int)(*(ignored++))] = '\0'; }/* */
/* */
s_cased = rsc_case_select; /* */
s_ignored = symbol((Uchar*)rsc_sel_ignored); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: s_match()
** Purpose:
**
**
** Arguments:
** p
** s
** Returns:
**___________________________________________________ */
static int s_match(p,s) /* */
Uchar * p; /* */
Uchar * s; /* */
{ /* */
while ( *p && s_class[(unsigned int)*p] == '\0' ) p++;/* */
/* */
while ( *p ) /* */
{ /* */
while ( *s && s_class[(unsigned int)*s] == '\0' ) s++;
/*printf(" '%c' [%c] =?= '%c' [%c]\n",*s,s_class[*s],*p,s_class[*p] );*/
if ( s_class[(unsigned int)*s] != s_class[(unsigned int)*p] ) return FALSE;
while ( *p && s_class[(unsigned int)*p] == '\0' ) p++;/* */
if (*s) s++; /* */
if (*p) p++; /* */
} /* */
return TRUE; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: s_search()
** Purpose: Match a pattern against all positions in a string. If
** a match is found then |TRUE| is returned. Otherwise
** |FALSE|.
** Arguments:
** pattern
** s
** Returns:
**___________________________________________________ */
static int s_search(pattern,s) /* */
Uchar * pattern; /* */
Uchar * s; /* */
{ /* */
if ( s_cased != rsc_case_select || /* */
strcmp((char*)s_ignored, /* */
(char*)rsc_sel_ignored) != 0 ) /* */
{ init_s_search(rsc_sel_ignored); } /* */
/* */
for ( ; *s; s++ ) /* */
{ if ( s_match(pattern,s) ) return TRUE; /* */
} /* */
return FALSE; /* */
} /*------------------------*/
#define ReturnIf(COND) \
if ( COND ) \
{ if ( !(RuleFlag(rule) & RULE_NOT) ) return TRUE; } \
else \
{ if ( (RuleFlag(rule) & RULE_NOT) ) return TRUE; }
/*-----------------------------------------------------------------------------
** Function: is_selected()
** Purpose: Boolean function to decide whether a record should be
** considered. These selections are described by a set of
** regular expressions which are applied. If none are
** given then the match simply succeeds.
** Arguments:
** db Database containing the record.
** rec Record to look at.
** Returns: |TRUE| iff the record is seleced by a regexp or none is
** given.
**___________________________________________________ */
int is_selected(db,rec) /* */
DB db; /* */
Record rec; /* */
{ /* */
int len, i; /* */
Uchar *value; /* */
Rule rule; /* */
/* */
if ( (rule=x_rule) == RuleNULL || /* If no rule is given or */
!rsc_select /* no selection is */
) /* requested then */
return TRUE; /* select all records. */
/* */
for ( ; /* Loop through all rules */
rule != RuleNULL; /* */
rule = NextRule(rule) ) /* */
{ /* */
if ( RuleField(rule) == NULL ) /* If no field is given */
{ /* then try all normal */
if ( RuleFlag(rule) & RULE_REGEXP ) /* */
{ /* */
#ifdef REGEX
if ( RecordHeap(rec)[0] ) /* */
{ len = strlen((char*)(RecordHeap(rec)[0]));/* */
ReturnIf(re_search(&RulePattern(rule), /* */
(char*)RecordHeap(rec)[0],/* */
len, /* */
0, /* */
len-1, /* */
®) >=0 ); /* */
} /* */
for ( i=2; i < RecordFree(rec); i+=2 ) /* */
{ if ( RecordHeap(rec)[i] ) /* */
{ len = strlen((char*)(RecordHeap(rec)[i+1]));/* */
ReturnIf(re_search(&RulePattern(rule), /* */
(char*)RecordHeap(rec)[i+1],/* */
len, /* */
0, /* */
len-1, /* */
®) >=0 ); /* */
} /* */
} /* */
#endif
} /* */
else /* */
{ /* */
if ( RecordHeap(rec)[0] ) /* */
{ ReturnIf(s_search(RuleGoal(rule), /* */
RecordHeap(rec)[0]) ); /* */
} /* */
for ( i=2; i < RecordFree(rec); i+=2 ) /* */
{ if ( RecordHeap(rec)[i] ) /* */
{ ReturnIf(s_search(RuleGoal(rule), /* */
RecordHeap(rec)[i+1]) );/* */
} /* */
} /* */
} /* */
} /* */
else if ( (value=get_field(db, /* */
rec, /* */
RuleField(rule))) /* */
!= NULL ) /* */
{ /* */
if ( RuleFlag(rule) & RULE_REGEXP ) /* */
{ /* */
#ifdef REGEX
len = strlen((char*)value); /* */
ReturnIf(re_search(&RulePattern(rule), /* */
(char *)value, /* */
len, /* */
0, /* */
len-1, /* */
®) >=0 ) /* */
#endif
} /* */
else ReturnIf(s_search(RuleGoal(rule),value))/* */
} /* */
else if ( RuleFlag(rule) & RULE_NOT ) /* */
{ return TRUE; /* */
} /* */
} /* */
return FALSE; /* return the result. */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: set_regex_syntax()
** Type: int
** Purpose: experimental
**
** Arguments:
** name
** Returns: nothing
**___________________________________________________ */
int set_regex_syntax(name) /* */
char* name; /* */
{ /* */
#ifdef REGEX
if ( strcmp(name,"emacs") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_EMACS); } /* */
else if ( strcmp(name,"awk") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_AWK); } /* */
else if ( strcmp(name,"grep") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_GREP); } /* */
else if ( strcmp(name,"egrep") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_EGREP); } /* */
else if ( strcmp(name,"posix_awk") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_POSIX_AWK); } /* */
else if ( strcmp(name,"posix_egrep") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_POSIX_EGREP); } /* */
else if ( strcmp(name,"ed") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_ED); } /* */
else if ( strcmp(name,"sed") == 0 ) /* */
{ re_set_syntax(RE_SYNTAX_SED); } /* */
else /* */
{ WARNING3("Unknown regexp syntax: ",name,"\n"); /* */
return 1; /* */
} /* */
#endif
return 0; /* */
} /*------------------------*/
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