+/*
+ * Copyright (c) 1995, the EUROPAGATE consortium (see below).
+ *
+ * The EUROPAGATE consortium members are:
+ *
+ * University College Dublin
+ * Danmarks Teknologiske Videnscenter
+ * An Chomhairle Leabharlanna
+ * Consejo Superior de Investigaciones Cientificas
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation, in whole or in part, for any purpose, is hereby granted,
+ * provided that:
+ *
+ * 1. This copyright and permission notice appear in all copies of the
+ * software and its documentation. Notices of copyright or attribution
+ * which appear at the beginning of any file must remain unchanged.
+ *
+ * 2. The names of EUROPAGATE or the project partners may not be used to
+ * endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * 3. Users of this software (implementors and gateway operators) agree to
+ * inform the EUROPAGATE consortium of their use of the software. This
+ * information will be used to evaluate the EUROPAGATE project and the
+ * software, and to plan further developments. The consortium may use
+ * the information in later publications.
+ *
+ * 4. Users of this software agree to make their best efforts, when
+ * documenting their use of the software, to acknowledge the EUROPAGATE
+ * consortium, and the role played by the software in their work.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE
+ * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF
+ * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
+ * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND
+ * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Log: wtcl.c,v $
+ * Revision 1.1 1995/10/20 14:02:42 adam
+ * First version of WWW gateway with embedded Tcl.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <ctype.h>
+
+#include <tcl.h>
+
+#include "wproto.h"
+#include "winterp.h"
+
+static void *do_create (void *args);
+static int do_exec (WCLIENT wcl, const char *fname, char *parms, void *mydata);
+
+static struct w_interp_type w_interp_t = {
+ "tcl",
+ do_create,
+ do_exec
+};
+
+W_Interp_Type w_interp_tcl = &w_interp_t;
+
+
+static char *mod = "wtcl";
+
+struct tcl_info {
+ Tcl_Interp *interp;
+ char *fbuf;
+ int fbuf_size;
+ int fbuf_ptr;
+};
+
+static void *do_create (void *args)
+{
+ struct tcl_info *p;
+
+ if (!(p = malloc (sizeof(*p))))
+ {
+ gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "malloc: tcl_info");
+ exit (1);
+ }
+ if (!(p->interp = Tcl_CreateInterp ()))
+ {
+ gw_log (GW_LOG_FATAL, mod, "Cannot make Tcl_Interp");
+ exit (1);
+ }
+ p->fbuf_size = 1024;
+ if (!(p->fbuf = malloc (p->fbuf_size)))
+ {
+ gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "malloc: tcl_info fbuf");
+ exit (1);
+ }
+ return p;
+}
+
+static int tcl_exec (WCLIENT wcl, const char *fname, char *parms,
+ struct tcl_info *p, FILE *inf, int *lineno)
+{
+ int c, escape = 0, level = 0;
+ int r, fbuf_ptr = 0;
+ int local_line = 0;
+
+ gw_log (GW_LOG_DEBUG, mod, "tcl_exec. line %d", *lineno);
+ while (1)
+ {
+ if (fbuf_ptr == p->fbuf_size-1)
+ {
+ char *newb;
+
+ if (!(newb = malloc (p->fbuf_size += 16384)))
+ {
+ gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "malloc: fbuf");
+ exit (1);
+ }
+ memcpy (newb, p->fbuf, fbuf_ptr);
+ free (p->fbuf);
+ p->fbuf = newb;
+ }
+ c = getc (inf);
+ if (c == EOF)
+ {
+ gw_log (GW_LOG_WARN, mod, "Unexpected EOF: unbalanced braces");
+ return -1;
+ }
+ if (c == '\\')
+ escape = 1;
+ else if (c == '{' && !escape)
+ {
+ level++;
+ escape = 0;
+ }
+ else if (c == '}' && !escape)
+ {
+ if (--level < 0)
+ break;
+ escape = 0;
+ }
+ else
+ {
+ if (c == '\n')
+ local_line++;
+ escape = 0;
+ }
+ p->fbuf[fbuf_ptr++] = c;
+ }
+ p->fbuf[fbuf_ptr] = '\0';
+ gw_log (GW_LOG_DEBUG, mod, "Tcl_Eval. %d lines", local_line);
+ r = Tcl_Eval (p->interp, p->fbuf);
+ if (r != TCL_OK)
+ {
+ gw_log (GW_LOG_WARN, mod, "Error in Tcl script starting on line %d",
+ *lineno);
+ }
+ (*lineno) += local_line;
+ return 0;
+}
+
+static int do_exec (WCLIENT wcl, const char *fname, char *parms,
+ void *mydata)
+{
+ struct tcl_info *p = mydata;
+ int c, escape = 0;
+ int lineno = 1;
+ FILE *inf = fopen (fname, "r");
+
+ gw_log (GW_LOG_DEBUG, mod, "Executing %s", fname);
+ if (!inf)
+ {
+ gw_log (GW_LOG_WARN|GW_LOG_ERRNO, mod, "open %s", fname);
+ return -1;
+ }
+ while ((c = getc(inf)) != EOF)
+ {
+ if (c == '\\')
+ escape = 1;
+ else if (c == '{')
+ {
+ if (escape)
+ wo_putc (wcl, c);
+ else
+ {
+ if (tcl_exec (wcl, fname, parms, p, inf, &lineno))
+ {
+ fclose (inf);
+ return -2;
+ }
+ }
+ escape = 0;
+ }
+ else
+ {
+ if (c == '\n')
+ lineno++;
+ escape = 0;
+ wo_putc (wcl, c);
+ }
+ }
+ fclose (inf);
+ return 0;
+}