408 lines
9.2 KiB
C
408 lines
9.2 KiB
C
/* $Header: /p/tcsh/cvsroot/tcsh/gethost.c,v 1.19 2014/03/09 00:11:54 christos Exp $ */
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/*
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* gethost.c: Create version file from prototype
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sh.h"
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RCSID("$tcsh: gethost.c,v 1.19 2014/03/09 00:11:54 christos Exp $")
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#ifdef SCO
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# define perror __perror
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# define rename __rename
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# define getopt __getopt
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# define system __system
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#endif
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#include <stdio.h>
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#ifdef SCO
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# undef perror
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# undef rename
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# undef getopt
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# undef system
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#endif
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#include <ctype.h>
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#define ISSPACE(p) (isspace((unsigned char) (p)) && (p) != '\n')
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/*
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* We cannot do that, because some compilers like #line and others
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* like # <lineno>
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* #define LINEDIRECTIVE
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*/
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static const char *keyword[] =
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{
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"vendor",
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#define T_VENDOR 0
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"hosttype",
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#define T_HOSTTYPE 1
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"machtype",
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#define T_MACHTYPE 2
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"ostype",
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#define T_OSTYPE 3
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"newdef",
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#define T_NEWDEF 4
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"enddef",
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#define T_ENDDEF 5
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"newcode",
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#define T_NEWCODE 6
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"endcode",
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#define T_ENDCODE 7
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"comment",
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#define T_COMMENT 8
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"macro",
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#define T_MACRO 9
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NULL
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#define T_NONE 10
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};
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#define S_DISCARD 0
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#define S_COMMENT 1
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#define S_CODE 2
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#define S_KEYWORD 3
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static int findtoken (char *);
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static char *gettoken (char **, char *);
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static char *pname;
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int main (int, char *[]);
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/* findtoken():
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* Return the token number of the given token
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*/
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static int
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findtoken(char *ptr)
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{
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int i;
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if (ptr == NULL || *ptr == '\0')
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return T_NONE;
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for (i = 0; keyword[i] != NULL; i++)
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if (strcmp(keyword[i], ptr) == 0)
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return i;
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return T_NONE;
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}
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/* gettoken():
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* Get : delimited token and remove leading/trailing blanks/newlines
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*/
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static char *
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gettoken(char **pptr, char *token)
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{
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char *ptr = *pptr;
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char *tok = token;
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for (; *ptr && ISSPACE(*ptr); ptr++)
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continue;
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for (; *ptr && *ptr != ':'; *tok++ = *ptr++)
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continue;
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if (*ptr == ':')
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ptr++;
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else
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tok--;
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for (tok--; tok >= token && *tok && ISSPACE(*tok); tok--)
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continue;
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*++tok = '\0';
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*pptr = ptr;
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return token;
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}
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static char *
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cat(const char *a, const char *b, size_t len)
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{
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size_t l;
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char *r;
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if (len == 0)
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len = strlen(b) + 1;
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if (a)
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l = strlen(a) + len;
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else
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l = len;
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if ((r = malloc(l)) == NULL)
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abort();
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if (a)
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snprintf(r, l, "%s%.*s", a, (int)len, b);
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else
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snprintf(r, l, "%.*s", (int)len, b);
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return r;
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}
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static const char *
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explode(const char *defs)
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{
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static const char def[] = "defined("; /* ) */
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static char *buf;
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size_t len;
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const char *ptr, *bptr, *eptr = NULL, *name;
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if (strstr(defs, "#machine(" /* ) */))
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return defs;
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if (!strstr(defs, def))
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return defs;
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free(buf);
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buf = NULL;
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for (ptr = defs; (bptr = strstr(ptr, def)) != NULL; ptr = eptr + 1) {
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if (ptr != bptr)
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buf = cat(buf, ptr, bptr - ptr + 1);
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buf = cat(buf, "(", 0); /* ) */
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if ((eptr = strchr(ptr + sizeof(def) - 1, ')')) == NULL) {
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(void) fprintf(stderr, "%s: missing close paren `%s'\n",
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pname, defs);
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free(buf);
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return defs;
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}
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buf = cat(buf, bptr, eptr - bptr + 1);
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name = bptr + sizeof(def) - 1;
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len = eptr - name;
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if (len < 1) {
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(void) fprintf(stderr, "%s: empty define `%s'\n",
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pname, defs);
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free(buf);
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return defs;
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}
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if (*name != '_' && (*name != 'M' && name[1] != '_')) {
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char *undername = malloc(len + 10);
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if (undername == NULL)
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abort();
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buf = cat(buf, ") || defined(", 0);
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snprintf(undername, len + 10, "__%.*s__)", (int)len,
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name);
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buf = cat(buf, undername, len + 5);
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buf = cat(buf, ") || defined(", 0);
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snprintf(undername, len + 10, "__%.*s)", (int)len,
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name);
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buf = cat(buf, undername, len + 3);
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}
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buf = cat(buf, "))", 0);
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}
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if (!eptr) {
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(void) fprintf(stderr, "%s: invalid input `%s'\n", pname, defs);
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return defs;
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}
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buf = cat(buf, eptr + 1, 0);
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return buf;
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}
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int
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main(int argc, char *argv[])
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{
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char line[INBUFSIZE];
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const char *fname = "stdin";
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char *ptr, *tok;
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char defs[INBUFSIZE];
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char stmt[INBUFSIZE];
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FILE *fp = stdin;
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int lineno = 0;
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int inprocess = 0;
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int token, state;
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int errs = 0;
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if ((pname = strrchr(argv[0], '/')) == NULL)
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pname = argv[0];
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else
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pname++;
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if (argc > 2) {
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(void) fprintf(stderr, "Usage: %s [<filename>]\n", pname);
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return 1;
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}
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if (argc == 2)
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if ((fp = fopen(fname = argv[1], "r")) == NULL) {
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(void) fprintf(stderr, "%s: Cannot open `%s'\n", pname, fname);
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return 1;
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}
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state = S_DISCARD;
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while ((ptr = fgets(line, sizeof(line), fp)) != NULL) {
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lineno++;
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switch (token = findtoken(gettoken(&ptr, defs))) {
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case T_NEWCODE:
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state = S_CODE;
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break;
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case T_ENDCODE:
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state = S_DISCARD;
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break;
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case T_COMMENT:
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state = S_COMMENT;
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break;
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case T_NEWDEF:
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state = S_KEYWORD;
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break;
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case T_ENDDEF:
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state = S_DISCARD;
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break;
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case T_VENDOR:
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state = S_KEYWORD;
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break;
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case T_HOSTTYPE:
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state = S_KEYWORD;
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break;
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case T_MACHTYPE:
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state = S_KEYWORD;
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break;
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case T_OSTYPE:
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state = S_KEYWORD;
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break;
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case T_MACRO:
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if (gettoken(&ptr, defs) == NULL) {
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(void) fprintf(stderr, "%s: \"%s\", %d: Missing macro name\n",
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pname, fname, lineno);
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break;
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}
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if (gettoken(&ptr, stmt) == NULL) {
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(void) fprintf(stderr, "%s: \"%s\", %d: Missing macro body\n",
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pname, fname, lineno);
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break;
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}
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(void) fprintf(stdout, "\n#if %s\n# define %s\n#endif\n\n",
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explode(stmt), defs);
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break;
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case T_NONE:
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if (state != S_CODE && *defs != '\0') {
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(void) fprintf(stderr, "%s: \"%s\", %d: Discarded\n",
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pname, fname, lineno);
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if (++errs == 30) {
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(void) fprintf(stderr, "%s: Too many errors\n", pname);
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return 1;
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}
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break;
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}
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(void) fprintf(stdout, "%s", line);
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break;
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default:
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(void) fprintf(stderr, "%s: \"%s\", %d: Unexpected token\n",
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pname, fname, lineno);
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return 1;
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}
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switch (state) {
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case S_DISCARD:
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if (inprocess) {
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inprocess = 0;
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(void) fprintf(stdout, "#endif\n");
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}
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break;
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case S_KEYWORD:
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tok = gettoken(&ptr, defs);
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if (token == T_NEWDEF) {
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if (inprocess) {
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(void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
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pname, fname, lineno);
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return 1;
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}
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if (tok == NULL) {
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(void) fprintf(stderr, "%s: \"%s\", %d: No defs\n",
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pname, fname, lineno);
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return 1;
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}
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(void) fprintf(stdout, "\n\n");
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#ifdef LINEDIRECTIVE
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(void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
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#endif /* LINEDIRECTIVE */
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(void) fprintf(stdout, "#if (%s)\n", explode(defs));
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inprocess = 1;
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}
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else {
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if (tok && *tok)
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(void) fprintf(stdout, "# if (%s) && !defined(_%s_)\n",
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explode(defs), keyword[token]);
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else
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(void) fprintf(stdout, "# if !defined(_%s_)\n",
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keyword[token]);
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if (gettoken(&ptr, stmt) == NULL) {
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(void) fprintf(stderr, "%s: \"%s\", %d: No statement\n",
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pname, fname, lineno);
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return 1;
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}
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(void) fprintf(stdout, "# define _%s_\n", keyword[token]);
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(void) fprintf(stdout, " %s = %s;\n", keyword[token], stmt);
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(void) fprintf(stdout, "# endif\n");
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}
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break;
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case S_COMMENT:
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if (gettoken(&ptr, defs))
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(void) fprintf(stdout, " /* %s */\n", defs);
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break;
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case S_CODE:
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if (token == T_NEWCODE) {
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#ifdef LINEDIRECTIVE
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(void) fprintf(stdout, "# %d \"%s\"\n", lineno + 1, fname);
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#endif /* LINEDIRECTIVE */
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}
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break;
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default:
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(void) fprintf(stderr, "%s: \"%s\", %d: Unexpected state\n",
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pname, fname, lineno);
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return 1;
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}
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}
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if (inprocess) {
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(void) fprintf(stderr, "%s: \"%s\", %d: Missing enddef\n",
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pname, fname, lineno);
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return 1;
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}
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if (fp != stdin)
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(void) fclose(fp);
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return 0;
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}
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