[unix-history] / usr / src / usr.bin / error / pi.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)pi.c	5.1 (Berkeley) %G%";
#endif not lint

#include <stdio.h>
#include <ctype.h>
#include "error.h"

extern	char	*currentfilename;
static	char	*c_linenumber;
static	char	*unk_hdr[] = {"In", "program", "???"};
static	char	**c_header = &unk_hdr[0];

/*
 *	Attempt to handle error messages produced by pi (and by pc)
 *
 *	problem #1:	There is no file name available when a file does not
 *			use a #include; this will have to be given to error
 *			in the command line.
 *	problem #2:	pi doesn't always tell you what line number
 *			a error refers to; for example during the tree
 *			walk phase of code generation and error detection,
 *			an error can refer to "variable foo in procedure bletch"
 *			without giving a line number
 *	problem #3:	line numbers, when available, are attached to
 *			the source line, along with the source line itself
 *			These line numbers must be extracted, and
 *			the source line thrown away.
 *	problem #4:	Some error messages produce more than one line number
 *			on the same message.
 *			There are only two (I think):
 *				%s undefined on line%s
 *				%s improperly used on line%s
 *			here, the %s makes line plural or singular.
 *
 *	Here are the error strings used in pi version 1.2 that can refer
 *	to a file name or line number:
 *
 *		Multiply defined label in case, lines %d and %d
 *		Goto %s from line %d is into a structured statement
 *		End matched %s on line %d
 *		Inserted keyword end matching %s on line %d
 *
 *	Here are the general pi patterns recognized:
 *	define piptr == -.*^-.*
 *	define msg = .*
 *	define digit = [0-9]
 *	definename = .*
 *	define date_format letter*3 letter*3 (digit | (digit digit)) 
 *			(digit | (digit digit)):digit*2 digit*4
 *
 *	{e,E} (piptr) (msg)	Encounter an error during textual scan
 *	E {digit}* - (msg)	Have an error message that refers to a new line
 *	E - msg			Have an error message that refers to current
 *					function, program or procedure
 *	(date_format) (name):	When switch compilation files
 *	... (msg)		When refer to the previous line
 *	'In' ('procedure'|'function'|'program') (name):
 *				pi is now complaining about 2nd pass errors.
 *	
 *	Here is the output from a compilation
 *
 *
 *	     2  	var	i:integer;
 *	e --------------^--- Inserted ';'
 *	E 2 - All variables must be declared in one var part
 *	E 5 - Include filename must end in .i
 *	Mon Apr 21 15:56 1980  test.h:
 *	     2  begin
 *	e ------^--- Inserted ';'
 *	Mon Apr 21 16:06 1980  test.p:
 *	E 2 - Function type must be specified
 *	     6  procedure foo(var x:real);
 *	e ------^--- Inserted ';'
 *	In function bletch:
 *	  E - No assignment to the function variable
 *	  w - variable x is never used
 *	E 6 - foo is already defined in this block
 *	In procedure foo:
 *	  w - variable x is neither used nor set
 *	     9  	z : = 23;
 *	E --------------^--- Undefined variable
 *	    10  	y = [1];
 *	e ----------------^--- Inserted ':'
 *	    13  	z := 345.;
 *	e -----------------------^--- Digits required after decimal point
 *	E 10 - Constant set involved in non set context
 *	E 11 - Type clash: real is incompatible with integer
 *	   ... Type of expression clashed with type of variable in assignment
 *	E 12 - Parameter type not identical to type of var parameter x of foo
 *	In program mung:
 *	  w - variable y is never used
 *	  w - type foo is never used
 *	  w - function bletch is never used
 *	  E - z undefined on lines 9 13
 */
char *Months[] = {
	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	"Jul", "Aug", "Sep", "Oct","Nov", "Dec",
	0
};
char *Days[] = {
	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
};
char *Piroutines[] = {
		"program", "function", "procedure", 0
};


static boolean	structured, multiple;

char *pi_Endmatched[] = {"End", "matched"};
char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};

char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"};
char *pi_structured[] = {"is", "into", "a", "structured", "statement"};

char *pi_und1[] = {"undefined", "on", "line"};
char *pi_und2[] = {"undefined", "on", "lines"};
char *pi_imp1[] = {"improperly", "used", "on", "line"};
char *pi_imp2[] = {"improperly", "used", "on", "lines"};

boolean alldigits(string)
	reg	char	*string;
{
	for (; *string && isdigit(*string); string++)
		continue;
	return(*string == '\0');
}
boolean instringset(member, set)
		char	*member;
	reg	char	**set;
{
	for(; *set; set++){
		if (strcmp(*set, member) == 0)
			return(TRUE);
	}
	return(FALSE);
}

boolean isdateformat(wordc, wordv)
	int	wordc;
	char	**wordv;
{
	return(
	        (wordc == 5)
	     && (instringset(wordv[0], Days))
	     && (instringset(wordv[1], Months))
	     && (alldigits(wordv[2]))
	     && (alldigits(wordv[4])) );
}

boolean piptr(string)
	reg	char	*string;
{
	if (*string != '-')
		return(FALSE);
	while (*string && *string == '-')
		string++;
	if (*string != '^')
		return(FALSE);
	string++;
	while (*string && *string == '-')
		string++;
	return(*string == '\0');
}

extern	int	wordc;
extern	char	**wordv;

Errorclass pi()
{
	char	**nwordv;

	if (wordc < 2)
		return (C_UNKNOWN);
	if (   ( strlen(wordv[1]) == 1)
	    && ( (wordv[1][0] == 'e') || (wordv[1][0] == 'E') )
	    && ( piptr(wordv[2]) )
	) {
		boolean	longpiptr = 0;
		/*
		 *	We have recognized a first pass error of the form:
		 *	letter ------^---- message
		 *
		 *	turn into an error message of the form:
		 *
		 *	file line 'pascal errortype' letter \n |---- message
		 *	or of the form:
		 *	file line letter |---- message
		 *		when there are strlen("(*[pi]") or more
		 *		preceding '-' on the error pointer.
		 *
		 *	Where the | is intended to be a down arrow, so that
		 *	the pi error messages can be inserted above the
		 *	line in error, instead of below.  (All of the other
		 *	langauges put thier messages before the source line,
		 *	instead of after it as does pi.)
		 *
		 *	where the pointer to the error has been truncated
		 *	by 6 characters to account for the fact that
		 *	the pointer points into a tab preceded input line.
		 */
		language = INPI;
		(void)substitute(wordv[2], '^', '|');
		longpiptr = position(wordv[2],'|') > (6+8);
		nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1);
		nwordv[0] = strsave(currentfilename);
		nwordv[1] = strsave(c_linenumber);
		if (!longpiptr){
			nwordv[2] = "pascal errortype";
			nwordv[3] = wordv[1];
			nwordv[4] = strsave("%%%\n");
			if (strlen(nwordv[5]) > (8-2))	/* this is the pointer */
				nwordv[5] += (8-2);	/* bump over 6 characters */
		}
		wordv = nwordv - 1;		/* convert to 1 based */
		wordc += longpiptr ? 2 : 4;
		return(C_TRUE);
	}
	if (   (wordc >= 4)
	    && (strlen(wordv[1]) == 1)
	    && ( (*wordv[1] == 'E') || (*wordv[1] == 'w') || (*wordv[1] == 'e') )
	    && (alldigits(wordv[2]))
	    && (strlen(wordv[3]) == 1)
	    && (wordv[3][0] == '-')
	){
		/*
		 *	Message of the form: letter linenumber - message
		 *	Turn into form: filename linenumber letter - message
		 */
		language = INPI;
		nwordv = wordvsplice(1, wordc, wordv + 1);
		nwordv[0] = strsave(currentfilename);
		nwordv[1] = wordv[2];
		nwordv[2] = wordv[1];
		c_linenumber = wordv[2];
		wordc += 1;
		wordv = nwordv - 1;
		return(C_TRUE);
	}
	if (   (wordc >= 3)
	    && (strlen(wordv[1]) == 1)
	    && ( (*(wordv[1]) == 'E') || (*(wordv[1]) == 'w') || (*(wordv[1]) == 'e') )
	    && (strlen(wordv[2]) == 1)
	    && (wordv[2][0] == '-')
	) {
		/*
		 *	Message of the form: letter - message
		 *	This happens only when we are traversing the tree
		 *	during the second pass of pi, and discover semantic
		 *	errors.
		 *
		 *	We have already (presumably) saved the header message
		 *	and can now construct a nulled error message for the
		 *	current file.
		 *
		 *	Turns into a message of the form:
		 *	filename (header) letter - message
		 *	
		 *	First, see if it is a message referring to more than
		 *	one line number.  Only of the form:
 		 *		%s undefined on line%s
 		 *		%s improperly used on line%s
		 */
		boolean undefined = 0;
		int	wordindex;

		language = INPI;
		if (    (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) )
		     || (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) )
		     || (wordvcmp(wordv+2, 4, pi_imp1) == 0)
		     || (wordvcmp(wordv+2, 4, pi_imp2) == 0)
		){
			for (wordindex = undefined ? 5 : 6; wordindex <= wordc;
			    wordindex++){
				nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1);
				nwordv[0] = strsave(currentfilename);
				nwordv[1] = wordv[wordindex];
				if (wordindex != wordc)
					erroradd(undefined ? 4 : 5, nwordv,
						C_TRUE, C_UNKNOWN);
			}
			wordc = undefined ? 4 : 5;
			wordv = nwordv - 1;
			return(C_TRUE);
		}

		nwordv = wordvsplice(1+3, wordc, wordv+1);
		nwordv[0] = strsave(currentfilename);
		nwordv[1] = strsave(c_header[0]);
		nwordv[2] = strsave(c_header[1]);
		nwordv[3] = strsave(c_header[2]);
		wordv = nwordv - 1;
		wordc += 1 + 3;
		return(C_THISFILE);
	}
	if (strcmp(wordv[1], "...") == 0){
		/*
		 *	have a continuation error message
		 *	of the form: ... message
		 *	Turn into form : filename linenumber message
		 */
		language = INPI;
		nwordv = wordvsplice(1, wordc, wordv+1);
		nwordv[0] = strsave(currentfilename);
		nwordv[1] = strsave(c_linenumber);
		wordv = nwordv - 1;
		wordc += 1;
		return(C_TRUE);
	}
	if(   (wordc == 6)
	   && (lastchar(wordv[6]) == ':')
	   && (isdateformat(5, wordv + 1))
	){
		/*
		 *	Have message that tells us we have changed files
		 */
		language = INPI;
		currentfilename = strsave(wordv[6]);
		clob_last(currentfilename, '\0');
		return(C_SYNC);
	}
	if(   (wordc == 3)
	   && (strcmp(wordv[1], "In") == 0)
	   && (lastchar(wordv[3]) == ':')
	   && (instringset(wordv[2], Piroutines))
	) {
		language = INPI;
		c_header = wordvsplice(0, wordc, wordv+1);
		return(C_SYNC);
	}
	/*
	 *	now, check for just the line number followed by the text
	 */
	if (alldigits(wordv[1])){
		language = INPI;
		c_linenumber = wordv[1];
		return(C_IGNORE);
	}
	/*
	 *	Attempt to match messages refering to a line number
	 *
	 *	Multiply defined label in case, lines %d and %d
	 *	Goto %s from line %d is into a structured statement
	 *	End matched %s on line %d
	 *	Inserted keyword end matching %s on line %d
	 */
	multiple = structured = 0;
	if (
	       ( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0))
	    || ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0))
	    || ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) )
	    || ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) ))
	){
		language = INPI;
		nwordv = wordvsplice(2, wordc, wordv+1);
		nwordv[0] = strsave(currentfilename);
		nwordv[1] = structured ? wordv [5] : wordv[wordc];
		wordc += 2;
		wordv = nwordv - 1;
		if (!multiple)
			return(C_TRUE);
		erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN);
		nwordv = wordvsplice(0, wordc, nwordv);
		nwordv[1] = wordv[wordc - 2];
		return(C_TRUE);
	}
	return(C_UNKNOWN);
}
Commit	Line	Data
442fe3bf DF	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
	7	#ifndef lint
	8	static char sccsid[] = "@(#)pi.c 5.1 (Berkeley) %G%";
	9	#endif not lint
	10
5df70589 BJ	11	#include <stdio.h>
	12	#include <ctype.h>
	13	#include "error.h"
	14
	15	extern char *currentfilename;
	16	static char *c_linenumber;
	17	static char *unk_hdr[] = {"In", "program", "???"};
	18	static char **c_header = &unk_hdr[0];
	19
	20	/*
	21	* Attempt to handle error messages produced by pi (and by pc)
	22	*
	23	* problem #1: There is no file name available when a file does not
	24	* use a #include; this will have to be given to error
	25	* in the command line.
	26	* problem #2: pi doesn't always tell you what line number
	27	* a error refers to; for example during the tree
	28	* walk phase of code generation and error detection,
	29	* an error can refer to "variable foo in procedure bletch"
	30	* without giving a line number
	31	* problem #3: line numbers, when available, are attached to
	32	* the source line, along with the source line itself
	33	* These line numbers must be extracted, and
	34	* the source line thrown away.
	35	* problem #4: Some error messages produce more than one line number
	36	* on the same message.
	37	* There are only two (I think):
	38	* %s undefined on line%s
	39	* %s improperly used on line%s
	40	* here, the %s makes line plural or singular.
	41	*
	42	* Here are the error strings used in pi version 1.2 that can refer
	43	* to a file name or line number:
	44	*
	45	* Multiply defined label in case, lines %d and %d
	46	* Goto %s from line %d is into a structured statement
	47	* End matched %s on line %d
	48	* Inserted keyword end matching %s on line %d
	49	*
	50	* Here are the general pi patterns recognized:
	51	* define piptr == -.^-.
	52	* define msg = .*
	53	* define digit = [0-9]
	54	* definename = .*
	55	* define date_format letter3 letter3 (digit \| (digit digit))
	56	* (digit \| (digit digit)):digit2 digit4
	57	*
	58	* {e,E} (piptr) (msg) Encounter an error during textual scan
	59	* E {digit}* - (msg) Have an error message that refers to a new line
	60	* E - msg Have an error message that refers to current
	61	* function, program or procedure
	62	* (date_format) (name): When switch compilation files
	63	* ... (msg) When refer to the previous line
	64	* 'In' ('procedure'\|'function'\|'program') (name):
	65	* pi is now complaining about 2nd pass errors.
	66	*
	67	* Here is the output from a compilation
	68	*
	69	*
	70	* 2 var i:integer;
	71	* e --------------^--- Inserted ';'
	72	* E 2 - All variables must be declared in one var part
	73	* E 5 - Include filename must end in .i
	74	* Mon Apr 21 15:56 1980 test.h:
75	* 2 begin
76	* e ------^--- Inserted ';'
77	* Mon Apr 21 16:06 1980 test.p:
78	* E 2 - Function type must be specified
79	* 6 procedure foo(var x:real);
80	* e ------^--- Inserted ';'
81	* In function bletch:
82	* E - No assignment to the function variable
83	* w - variable x is never used
84	* E 6 - foo is already defined in this block
85	* In procedure foo:
86	* w - variable x is neither used nor set
87	* 9 z : = 23;
88	* E --------------^--- Undefined variable
89	* 10 y = [1];
90	* e ----------------^--- Inserted ':'
91	* 13 z := 345.;
92	* e -----------------------^--- Digits required after decimal point
93	* E 10 - Constant set involved in non set context
94	* E 11 - Type clash: real is incompatible with integer
95	* ... Type of expression clashed with type of variable in assignment
96	* E 12 - Parameter type not identical to type of var parameter x of foo
97	* In program mung:
98	* w - variable y is never used
99	* w - type foo is never used
100	* w - function bletch is never used
101	* E - z undefined on lines 9 13
102	*/
103	char *Months[] = {
104	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
105	"Jul", "Aug", "Sep", "Oct","Nov", "Dec",
106	0
107	};
108	char *Days[] = {
109	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 0
110	};
111	char *Piroutines[] = {
112	"program", "function", "procedure", 0
113	};
114
115
116	static boolean structured, multiple;
117
118	char *pi_Endmatched[] = {"End", "matched"};
119	char *pi_Inserted[] = {"Inserted", "keyword", "end", "matching"};
120
121	char *pi_multiple[] = {"Mutiply", "defined", "label", "in", "case,", "line"};
122	char *pi_structured[] = {"is", "into", "a", "structured", "statement"};
123
124	char *pi_und1[] = {"undefined", "on", "line"};
125	char *pi_und2[] = {"undefined", "on", "lines"};
126	char *pi_imp1[] = {"improperly", "used", "on", "line"};
127	char *pi_imp2[] = {"improperly", "used", "on", "lines"};
128
129	boolean alldigits(string)
58195f21	130	reg char *string;
5df70589 BJ	131	{
	132	for (; string && isdigit(string); string++)
	133	continue;
	134	return(*string == '\0');
	135	}
	136	boolean instringset(member, set)
58195f21 RH	137	char *member;
58195f21 RH	138	reg char **set;
5df70589 BJ	139	{
	140	for(; *set; set++){
	141	if (strcmp(*set, member) == 0)
	142	return(TRUE);
	143	}
	144	return(FALSE);
	145	}
	146
	147	boolean isdateformat(wordc, wordv)
	148	int wordc;
	149	char **wordv;
	150	{
	151	return(
	152	(wordc == 5)
	153	&& (instringset(wordv[0], Days))
	154	&& (instringset(wordv[1], Months))
	155	&& (alldigits(wordv[2]))
	156	&& (alldigits(wordv[4])) );
	157	}
	158
	159	boolean piptr(string)
58195f21	160	reg char *string;
5df70589	161	{
5df70589 BJ	162	if (*string != '-')
	163	return(FALSE);
	164	while (string && string == '-')
	165	string++;
	166	if (*string != '^')
	167	return(FALSE);
	168	string++;
	169	while (string && string == '-')
	170	string++;
	171	return(*string == '\0');
	172	}
	173
	174	extern int wordc;
	175	extern char **wordv;
	176
	177	Errorclass pi()
	178	{
	179	char **nwordv;
5df70589	180
52ee5750 SL	181	if (wordc < 2)
52ee5750 SL	182	return (C_UNKNOWN);
5df70589 BJ	183	if ( ( strlen(wordv[1]) == 1)
	184	&& ( (wordv[1][0] == 'e') \|\| (wordv[1][0] == 'E') )
	185	&& ( piptr(wordv[2]) )
	186	) {
	187	boolean longpiptr = 0;
	188	/*
	189	* We have recognized a first pass error of the form:
	190	* letter ------^---- message
	191	*
	192	* turn into an error message of the form:
	193	*
	194	* file line 'pascal errortype' letter \n \|---- message
	195	* or of the form:
	196	* file line letter \|---- message
	197	* when there are strlen("(*[pi]") or more
	198	* preceding '-' on the error pointer.
	199	*
	200	* Where the \| is intended to be a down arrow, so that
	201	* the pi error messages can be inserted above the
	202	* line in error, instead of below. (All of the other
	203	* langauges put thier messages before the source line,
	204	* instead of after it as does pi.)
	205	*
	206	* where the pointer to the error has been truncated
	207	* by 6 characters to account for the fact that
	208	* the pointer points into a tab preceded input line.
	209	*/
	210	language = INPI;
58195f21	211	(void)substitute(wordv[2], '^', '\|');
5df70589 BJ	212	longpiptr = position(wordv[2],'\|') > (6+8);
	213	nwordv = wordvsplice(longpiptr ? 2 : 4, wordc, wordv+1);
	214	nwordv[0] = strsave(currentfilename);
	215	nwordv[1] = strsave(c_linenumber);
	216	if (!longpiptr){
	217	nwordv[2] = "pascal errortype";
	218	nwordv[3] = wordv[1];
	219	nwordv[4] = strsave("%%%\n");
	220	if (strlen(nwordv[5]) > (8-2)) /* this is the pointer */
	221	nwordv[5] += (8-2); /* bump over 6 characters */
	222	}
	223	wordv = nwordv - 1; /* convert to 1 based */
	224	wordc += longpiptr ? 2 : 4;
	225	return(C_TRUE);
	226	}
	227	if ( (wordc >= 4)
	228	&& (strlen(wordv[1]) == 1)
	229	&& ( (wordv[1] == 'E') \|\| (wordv[1] == 'w') \|\| (*wordv[1] == 'e') )
	230	&& (alldigits(wordv[2]))
	231	&& (strlen(wordv[3]) == 1)
	232	&& (wordv[3][0] == '-')
	233	){
	234	/*
	235	* Message of the form: letter linenumber - message
	236	* Turn into form: filename linenumber letter - message
	237	*/
	238	language = INPI;
	239	nwordv = wordvsplice(1, wordc, wordv + 1);
	240	nwordv[0] = strsave(currentfilename);
	241	nwordv[1] = wordv[2];
	242	nwordv[2] = wordv[1];
	243	c_linenumber = wordv[2];
	244	wordc += 1;
	245	wordv = nwordv - 1;
	246	return(C_TRUE);
	247	}
	248	if ( (wordc >= 3)
	249	&& (strlen(wordv[1]) == 1)
	250	&& ( ((wordv[1]) == 'E') \|\| ((wordv[1]) == 'w') \|\| (*(wordv[1]) == 'e') )
	251	&& (strlen(wordv[2]) == 1)
	252	&& (wordv[2][0] == '-')
	253	) {
	254	/*
	255	* Message of the form: letter - message
	256	* This happens only when we are traversing the tree
	257	* during the second pass of pi, and discover semantic
	258	* errors.
	259	*
	260	* We have already (presumably) saved the header message
	261	* and can now construct a nulled error message for the
	262	* current file.
	263	*
	264	* Turns into a message of the form:
	265	* filename (header) letter - message
	266	*
	267	* First, see if it is a message referring to more than
	268	* one line number. Only of the form:
	269	* %s undefined on line%s
	270	* %s improperly used on line%s
	271	*/
	272	boolean undefined = 0;
	273	int wordindex;
	274
	275	language = INPI;
276	if ( (undefined = (wordvcmp(wordv+2, 3, pi_und1) == 0) )
277	\|\| (undefined = (wordvcmp(wordv+2, 3, pi_und2) == 0) )
278	\|\| (wordvcmp(wordv+2, 4, pi_imp1) == 0)
279	\|\| (wordvcmp(wordv+2, 4, pi_imp2) == 0)
280	){
281	for (wordindex = undefined ? 5 : 6; wordindex <= wordc;
282	wordindex++){
283	nwordv = wordvsplice(2, undefined ? 2 : 3, wordv+1);
284	nwordv[0] = strsave(currentfilename);
285	nwordv[1] = wordv[wordindex];
286	if (wordindex != wordc)
287	erroradd(undefined ? 4 : 5, nwordv,
288	C_TRUE, C_UNKNOWN);
289	}
290	wordc = undefined ? 4 : 5;
291	wordv = nwordv - 1;
292	return(C_TRUE);
293	}
294
295	nwordv = wordvsplice(1+3, wordc, wordv+1);
296	nwordv[0] = strsave(currentfilename);
297	nwordv[1] = strsave(c_header[0]);
298	nwordv[2] = strsave(c_header[1]);
299	nwordv[3] = strsave(c_header[2]);
300	wordv = nwordv - 1;
301	wordc += 1 + 3;
302	return(C_THISFILE);
303	}
304	if (strcmp(wordv[1], "...") == 0){
305	/*
306	* have a continuation error message
307	* of the form: ... message
308	* Turn into form : filename linenumber message
309	*/
310	language = INPI;
311	nwordv = wordvsplice(1, wordc, wordv+1);
312	nwordv[0] = strsave(currentfilename);
313	nwordv[1] = strsave(c_linenumber);
314	wordv = nwordv - 1;
315	wordc += 1;
316	return(C_TRUE);
317	}
318	if( (wordc == 6)
319	&& (lastchar(wordv[6]) == ':')
320	&& (isdateformat(5, wordv + 1))
321	){
322	/*
323	* Have message that tells us we have changed files
324	*/
325	language = INPI;
326	currentfilename = strsave(wordv[6]);
327	clob_last(currentfilename, '\0');
328	return(C_SYNC);
329	}
330	if( (wordc == 3)
331	&& (strcmp(wordv[1], "In") == 0)
332	&& (lastchar(wordv[3]) == ':')
333	&& (instringset(wordv[2], Piroutines))
334	) {
335	language = INPI;
336	c_header = wordvsplice(0, wordc, wordv+1);
337	return(C_SYNC);
338	}
339	/*
340	* now, check for just the line number followed by the text
341	*/
342	if (alldigits(wordv[1])){
343	language = INPI;
344	c_linenumber = wordv[1];
345	return(C_IGNORE);
346	}
347	/*
348	* Attempt to match messages refering to a line number
349	*
350	* Multiply defined label in case, lines %d and %d
351	* Goto %s from line %d is into a structured statement
352	* End matched %s on line %d
353	* Inserted keyword end matching %s on line %d
354	*/
355	multiple = structured = 0;
356	if (
357	( (wordc == 6) && (wordvcmp(wordv+1, 2, pi_Endmatched) == 0))
358	\|\| ( (wordc == 8) && (wordvcmp(wordv+1, 4, pi_Inserted) == 0))
359	\|\| ( multiple = ((wordc == 9) && (wordvcmp(wordv+1,6, pi_multiple) == 0) ) )
360	\|\| ( structured = ((wordc == 10) && (wordvcmp(wordv+6,5, pi_structured) == 0 ) ))
361	){
362	language = INPI;
363	nwordv = wordvsplice(2, wordc, wordv+1);
364	nwordv[0] = strsave(currentfilename);
365	nwordv[1] = structured ? wordv [5] : wordv[wordc];
366	wordc += 2;
367	wordv = nwordv - 1;
368	if (!multiple)
369	return(C_TRUE);
370	erroradd(wordc, nwordv, C_TRUE, C_UNKNOWN);
371	nwordv = wordvsplice(0, wordc, nwordv);
372	nwordv[1] = wordv[wordc - 2];
373	return(C_TRUE);
374	}
375	return(C_UNKNOWN);
376	}