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| Current File : //usr/src/contrib/tcsh/gethost.c |
/* $Header: /p/tcsh/cvsroot/tcsh/gethost.c,v 1.15 2012/01/15 17:14:54 christos Exp $ */
/*
* gethost.c: Create version file from prototype
*/
/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "sh.h"
RCSID("$tcsh: gethost.c,v 1.15 2012/01/15 17:14:54 christos Exp $")
#ifdef SCO
# define perror __perror
# define rename __rename
# define getopt __getopt
# define system __system
#endif
#include <stdio.h>
#ifdef SCO
# undef perror
# undef rename
# undef getopt
# undef system
#endif
#include <ctype.h>
#define ISSPACE(p) (isspace((unsigned char) (p)) && (p) != '\n')
/*
* We cannot do that, because some compilers like #line and others
* like # <lineno>
* #define LINEDIRECTIVE
*/
static const char *keyword[] =
{
"vendor",
#define T_VENDOR 0
"hosttype",
#define T_HOSTTYPE 1
"machtype",
#define T_MACHTYPE 2
"ostype",
#define T_OSTYPE 3
"newdef",
#define T_NEWDEF 4
"enddef",
#define T_ENDDEF 5
"newcode",
#define T_NEWCODE 6
"endcode",
#define T_ENDCODE 7
"comment",
#define T_COMMENT 8
"macro",
#define T_MACRO 9
NULL
#define T_NONE 10
};
#define S_DISCARD 0
#define S_COMMENT 1
#define S_CODE 2
#define S_KEYWORD 3
static int findtoken (char *);
static char *gettoken (char **, char *);
static char *pname;
int main (int, char *[]);
/* findtoken():
* Return the token number of the given token
*/
static int
findtoken(char *ptr)
{
int i;
if (ptr == NULL || *ptr == '\0')
return T_NONE;
for (i = 0; keyword[i] != NULL; i++)
if (strcmp(keyword[i], ptr) == 0)
return i;
return T_NONE;
}
/* gettoken():
* Get : delimited token and remove leading/trailing blanks/newlines
*/
static char *
gettoken(char **pptr, char *token)
{
char *ptr = *pptr;
char *tok = token;
for (; *ptr && ISSPACE(*ptr); ptr++)
continue;
for (; *ptr && *ptr != ':'; *tok++ = *ptr++)
continue;
if (*ptr == ':')
ptr++;
else
tok--;
for (tok--; tok >= token && *tok && ISSPACE(*tok); tok--)
continue;
*++tok = '\0';
*pptr = ptr;
return token;
}
static char *
cat(const char *a, const char *b, size_t len)
{
size_t l;
char *r;
if (len == 0)
len = strlen(b);
l = strlen(a) + len + 1;
if ((r = malloc(l)) == NULL)
abort();
snprintf(r, l, "%s%.*s", a, (int)len, b);
return r;
}
static const char *
explode(const char *defs)
{
static const char def[] = "defined("; /* ) */
static char *buf;
size_t len;
const char *ptr, *bptr, *eptr = NULL, *name;
size_t buflen = 0;
if (strstr(defs, "#machine(" /* ) */))
return defs;
free(buf);
buf = strdup("("); /* ) */
for (ptr = defs; (bptr = strstr(ptr, def)) != NULL; ptr = eptr + 1) {
if (ptr != bptr)
buf = cat(buf, ptr, bptr - ptr);
if ((eptr = strchr(ptr + sizeof(def) - 1, ')')) == NULL) {
(void) fprintf(stderr, "%s: missing close paren `%s'\n",
pname, defs);
return defs;
}
buf = cat(buf, bptr, eptr - bptr + 1);
name = bptr + sizeof(def) - 1;
len = eptr - name;
if (len < 1) {
(void) fprintf(stderr, "%s: empty define `%s'\n",
pname, defs);
return defs;
}
if (*name != '_') {
char *undername = malloc(len + 10);
buf = cat(buf, " || defined(", 0);
snprintf(undername, len + 10, "__%.*s__)", (int)len,
name);
buf = cat(buf, undername, len + 5);
buf = cat(buf, " || defined(", 0);
snprintf(undername, len + 10, "__%.*s)", (int)len,
name);
buf = cat(buf, undername, len + 3);
}
}
if (!eptr) {
(void) fprintf(stderr, "%s: invalid input `%s'\n", pname, defs);
return defs;
}
buf = cat(buf, eptr + 1, 0);
buf = cat(buf, ")", 0);
return buf;
}
int
main(int argc, char *argv[])
{
char line[INBUFSIZE];
const char *fname = "stdin";
char *ptr, *tok;
char defs[INBUFSIZE];
char stmt[INBUFSIZE];
FILE *fp = stdin;
int lineno = 0;
int inprocess = 0;
int token, state;
int errs = 0;
if ((pname = strrchr(argv[0], '/')) == NULL)
pname = argv[0];
else
pname++;
if (argc > 2) {
(void) fprintf(stderr, "Usage: %s [<filename>]\n", pname);
return 1;
}
if (argc == 2)
if ((fp = fopen(fname = argv[1], "r")) == NULL) {
(void) fprintf(stderr, "%s: Cannot open `%s'\n", pname, fname);
return 1;
}
state = S_DISCARD;
while ((ptr = fgets(line, sizeof(line), fp)) != NULL) {
lineno++;
switch (token = findtoken(gettoken(&ptr, defs))) {
case T_NEWCODE:
state = S_CODE;
break;
case T_ENDCODE:
state = S_DISCARD;
break;
case T_COMMENT:
state = S_COMMENT;
break;
case T_NEWDEF:
state = S_KEYWORD;
break;
case T_ENDDEF:
state = S_DISCARD;
break;
case T_VENDOR:
state = S_KEYWORD;
break;
case T_HOSTTYPE:
state = S_KEYWORD;
break;
case T_MACHTYPE:
state = S_KEYWORD;
break;
case T_OSTYPE:
state = S_KEYWORD;
break;
case T_MACRO:
if (gettoken(&ptr, defs) == NULL) {
(void) fprintf(stderr, "%s: \"%s\", %d: Missing macro name\n",
pname, fname, lineno);
break;
}
if (gettoken(&ptr, stmt) == NULL) {
(void) fprintf(stderr, "%s: \"%s\", %d: Missing macro body\n",
pname, fname, lineno);
break;
}
(void) fprintf(stdout, "\n#if %s\n# define %s\n#endif\n\n", stmt,
defs);
break;
case T_NONE:
if (state != S_CODE && *defs != '\0') {
(void) fprintf(stderr, "%s: \"%s\", %d: Discarded\n",
pname, fname, lineno);
if (++errs == 30) {
(void) fprintf(stderr, "%s: Too many errors\n", pname);
return 1;
}
break;
}
(void) fprintf(stdout, "%s", line);
break;
default:
(void) fprintf(stderr, "%s: \"%s\", %d: Unexpected token\n",
pname, fname, lineno);
return 1;
}
switch (state) {
case S_DISCARD:
if (inprocess) {
inprocess = 0;
(void) fprintf(stdout, "#endif\n");
}
break;
case S_KEYWORD:
tok = gettoken(&ptr, defs);
if (token == T_NEWDEF) {
if (inprocess) {
(void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
pname, fname, lineno);
return 1;
}
if (tok == NULL) {
(void) fprintf(stderr, "%s: \"%s\", %d: No defs\n",
pname, fname, lineno);
return 1;
}
(void) fprintf(stdout, "\n\n");
#ifdef LINEDIRECTIVE
(void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
#endif /* LINEDIRECTIVE */
(void) fprintf(stdout, "#if %s\n", defs);
inprocess = 1;
}
else {
if (tok && *tok)
(void) fprintf(stdout, "# if (%s) && !defined(_%s_)\n",
explode(defs), keyword[token]);
else
(void) fprintf(stdout, "# if !defined(_%s_)\n",
keyword[token]);
if (gettoken(&ptr, stmt) == NULL) {
(void) fprintf(stderr, "%s: \"%s\", %d: No statement\n",
pname, fname, lineno);
return 1;
}
(void) fprintf(stdout, "# define _%s_\n", keyword[token]);
(void) fprintf(stdout, " %s = %s;\n", keyword[token], stmt);
(void) fprintf(stdout, "# endif\n");
}
break;
case S_COMMENT:
if (gettoken(&ptr, defs))
(void) fprintf(stdout, " /* %s */\n", defs);
break;
case S_CODE:
if (token == T_NEWCODE) {
#ifdef LINEDIRECTIVE
(void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
#endif /* LINEDIRECTIVE */
}
break;
default:
(void) fprintf(stderr, "%s: \"%s\", %d: Unexpected state\n",
pname, fname, lineno);
return 1;
}
}
if (inprocess) {
(void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
pname, fname, lineno);
return 1;
}
if (fp != stdin)
(void) fclose(fp);
return 0;
}