mirror of
https://github.com/matrix-construct/construct
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61b517ca3c
* To benefit from the precompiled-header (PCH) it MUST provide "the first C token." Advantages: Never worry about the include stack again. Remember, this means one less thing for random module developers, community people learning C++, and new developers to deal with. It should reduce the learning curve and barrier for participation. Disadvantages: Makes overall compilation a bit slower, especially without any additional work to improve it again. There are several opportunities, places where the PCH is probably being ignored, etc that can be addressed.
146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
/*
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* charybdis: an advanced ircd
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* substitution.c: parses substitution-keyword expansions
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*
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* Copyright (c) 2006-2007 William Pitcock <nenolod@nenolod.net>
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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 are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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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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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace ircd {
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/*
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* Simple mappings for $foo -> 'bar'.
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* Everything is a string, so typing doesn't really matter too
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* horribly much right now.
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*/
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struct substitution_variable
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{
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char *name;
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char *value;
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};
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/*
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* substitution_append_var
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*
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* Inputs - A variable list (rb_dlink_list), name -> value for mapping to make
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* Output - none
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* Side Effects - Adds a name->value mapping to a list.
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*/
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void substitution_append_var(rb_dlink_list *varlist, const char *name, const char *value)
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{
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struct substitution_variable *tmp = (substitution_variable *)rb_malloc(sizeof(struct substitution_variable));
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tmp->name = rb_strdup(name);
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tmp->value = rb_strdup(value);
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rb_dlinkAddAlloc(tmp, varlist);
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}
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/*
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* substitution_free
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*
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* Inputs - A rb_dlink_list of markup variables to free.
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* Outputs - none
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* Side Effects - Empties a list of markup variables.
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*/
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void substitution_free(rb_dlink_list *varlist)
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{
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rb_dlink_node *nptr, *nptr2;
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RB_DLINK_FOREACH_SAFE(nptr, nptr2, varlist->head)
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{
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struct substitution_variable *tmp = (struct substitution_variable *) nptr->data;
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rb_dlinkDestroy(nptr, varlist);
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rb_free(tmp->name);
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rb_free(tmp->value);
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rb_free(tmp);
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}
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}
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/*
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* substitution_parse
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*
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* Inputs - A markup string, rb_dlink-list of markup values
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* Output - A string which has been markup-replaced.
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* Side Effects - Strings larger than BUFSIZE are terminated.
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*/
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char *substitution_parse(const char *fmt, rb_dlink_list *varlist)
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{
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static char buf[BUFSIZE];
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const char *ptr;
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char *bptr = buf;
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for (ptr = fmt; *ptr != '\0' && bptr - buf < BUFSIZE; ptr++)
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if (*ptr != '$')
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*bptr++ = *ptr;
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else if (*(ptr + 1) == '{')
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{
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static char varname[BUFSIZE];
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char *vptr = varname;
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const char *pptr;
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rb_dlink_node *nptr;
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*vptr = '\0';
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/* break out ${var} */
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for (pptr = ptr + 2; *pptr != '\0'; pptr++)
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{
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if (*pptr != '}')
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*vptr++ = *pptr;
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else
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{
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*vptr++ = '\0';
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break;
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}
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}
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s_assert(*varname != '\0');
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s_assert(*pptr != '\0');
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/* advance ptr by length of variable */
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ptr += (pptr - ptr);
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RB_DLINK_FOREACH(nptr, varlist->head)
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{
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struct substitution_variable *val = (struct substitution_variable *) nptr->data;
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if (!rb_strcasecmp(varname, val->name))
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{
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rb_strlcpy(bptr, val->value, BUFSIZE - (bptr - buf));
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bptr += strlen(val->value);
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break;
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}
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}
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}
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*bptr = '\0';
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return buf;
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}
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}
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