Category : UNIX Files
Archive   : REGEXP3.ZIP
Filename : TRY.C

/*
* Simple test program for regexp(3) stuff. Knows about debugging hooks.
*
* Copyright (c) 1986 by University of Toronto.
* Written by Henry Spencer. Not derived from licensed software.
*
* Permission is granted to anyone to use this software for any
* purpose on any computer system, and to redistribute it freely,
* subject to the following restrictions:
*
* 1. The author is not responsible for the consequences of use of
* this software, no matter how awful, even if they arise
* from defects in it.
*
* 2. The origin of this software must not be misrepresented, either
* by explicit claim or by omission.
*
* 3. Altered versions must be plainly marked as such, and must not
* be misrepresented as being the original software.
*
* Usage: try re [string [output [-]]]
* The re is compiled and dumped, regexeced against the string, the result
* is applied to output using regsub(). The - triggers a running narrative
* from regexec(). Dumping and narrative don't happen unless DEBUG.
*
* If there are no arguments, stdin is assumed to be a stream of lines with
* five fields: a r.e., a string to match it against, a result code, a
* source string for regsub, and the proper result. Result codes are 'c'
* for compile failure, 'y' for match success, 'n' for match failure.
* Field separator is tab.
*/
#include
#include

#ifdef ERRAVAIL
char *progname;
extern char *mkprogname();
#endif

#ifdef DEBUG
extern int regnarrate;
#endif

char buf[BUFSIZ];

int errreport = 0; /* Report errors via errseen? */
char *errseen = NULL; /* Error message. */
int status = 0; /* Exit status. */

/* ARGSUSED */
main(argc, argv)
int argc;
char *argv[];
{
regexp *r;
int i;

#ifdef ERRAVAIL
progname = mkprogname(argv[0]);
#endif

if (argc == 1) {
multiple();
exit(status);
}

r = regcomp(argv[1]);
if (r == NULL)
error("regcomp failure", "");
#ifdef DEBUG
regdump(r);
if (argc > 4)
regnarrate++;
#endif
if (argc > 2) {
i = regexec(r, argv[2]);
printf("%d", i);
for (i = 1; i < NSUBEXP; i++)
if (r->startp[i] != NULL && r->endp[i] != NULL)
printf(" \\%d", i);
printf("\n");
}
if (argc > 3) {
regsub(r, argv[3], buf);
printf("%s\n", buf);
}
exit(status);
}

void
regerror(s)
char *s;
{
if (errreport)
errseen = s;
else
error(s, "");
}

#ifndef ERRAVAIL
error(s1, s2)
char *s1;
char *s2;
{
fprintf(stderr, "regexp: ");
fprintf(stderr, s1, s2);
fprintf(stderr, "\n");
exit(1);
}
#endif

int lineno;

regexp badregexp; /* Implicit init to 0. */

multiple()
{
char rbuf[BUFSIZ];
char *field[5];
char *scan;
int i;
regexp *r;
extern char *strchr();

errreport = 1;
lineno = 0;
while (fgets(rbuf, sizeof(rbuf), stdin) != NULL) {
rbuf[strlen(rbuf)-1] = '\0'; /* Dispense with \n. */
lineno++;
scan = rbuf;
for (i = 0; i < 5; i++) {
field[i] = scan;
if (field[i] == NULL) {
complain("bad testfile format", "");
exit(1);
}
scan = strchr(scan, '\t');
if (scan != NULL)
*scan++ = '\0';
}
try(field);
}

/* And finish up with some internal testing... */
lineno = 9990;
errseen = NULL;
if (regcomp((char *)NULL) != NULL || errseen == NULL)
complain("regcomp(NULL) doesn't complain", "");
lineno = 9991;
errseen = NULL;
if (regexec((regexp *)NULL, "foo") || errseen == NULL)
complain("regexec(NULL, ...) doesn't complain", "");
lineno = 9992;
r = regcomp("foo");
if (r == NULL) {
complain("regcomp(\"foo\") fails", "");
return;
}
lineno = 9993;
errseen = NULL;
if (regexec(r, (char *)NULL) || errseen == NULL)
complain("regexec(..., NULL) doesn't complain", "");
lineno = 9994;
errseen = NULL;
regsub((regexp *)NULL, "foo", rbuf);
if (errseen == NULL)
complain("regsub(NULL, ..., ...) doesn't complain", "");
lineno = 9995;
errseen = NULL;
regsub(r, (char *)NULL, rbuf);
if (errseen == NULL)
complain("regsub(..., NULL, ...) doesn't complain", "");
lineno = 9996;
errseen = NULL;
regsub(r, "foo", (char *)NULL);
if (errseen == NULL)
complain("regsub(..., ..., NULL) doesn't complain", "");
lineno = 9997;
errseen = NULL;
if (regexec(&badregexp, "foo") || errseen == NULL)
complain("regexec(nonsense, ...) doesn't complain", "");
lineno = 9998;
errseen = NULL;
regsub(&badregexp, "foo", rbuf);
if (errseen == NULL)
complain("regsub(nonsense, ..., ...) doesn't complain", "");
}

try(fields)
char **fields;
{
regexp *r;
char dbuf[BUFSIZ];

errseen = NULL;
r = regcomp(fields[0]);
if (r == NULL) {
if (*fields[2] != 'c')
complain("regcomp failure in `%s'", fields[0]);
return;
}
if (*fields[2] == 'c') {
complain("unexpected regcomp success in `%s'", fields[0]);
free((char *)r);
return;
}
if (!regexec(r, fields[1])) {
if (*fields[2] != 'n')
complain("regexec failure in `%s'", "");
free((char *)r);
return;
}
if (*fields[2] == 'n') {
complain("unexpected regexec success", "");
free((char *)r);
return;
}
errseen = NULL;
regsub(r, fields[3], dbuf);
if (errseen != NULL) {
complain("regsub complaint", "");
free((char *)r);
return;
}
if (strcmp(dbuf, fields[4]) != 0)
complain("regsub result `%s' wrong", dbuf);
free((char *)r);
}

complain(s1, s2)
char *s1;
char *s2;
{
fprintf(stderr, "try: %d: ", lineno);
fprintf(stderr, s1, s2);
fprintf(stderr, " (%s)\n", (errseen != NULL) ? errseen : "");
status = 1;
}