#include <stdarg.h> #include <stdio.h> #include <malloc.h> #include <string.h> #include "xmlapi.h" #include "wftk_internals.h" #include "localdefs.h" |
config_get_adaptor
function. Again, this is a
hardcoded version; better config modules will look things up instead of having everything
right here and statically linked.
Note a couple of things about this function. First, if the adaptor descriptor is a null pointer,
that means that the config module should use the system default. This isn't readily apparent in
the code below as it exists right now, because I've only provided system defaults at all.
Second, note that the big switch
statement is where we decide everything. This will
be replaced by Registry code or other more dynamic configuration in more sophisticated config modules.
To make the declarations of the various adaptors come out right, we need to declare a few functions
for each right here. So to configure this config module with a new adaptor, all you need to do is
to declare the functions here, and then add the adaptor into the switch
statement
below.
struct adaptor_info * DSREP_localxml_get_info(void); struct adaptor_info * PDREP_localxml_get_info(void); struct adaptor_info * USER_localxml_get_info(void); struct adaptor_info * PERMS_localxml_get_info(void); struct adaptor_info * TASKINDEX_stdout_get_info(void); struct adaptor_info * TASKINDEX_odbc_get_info(void); struct adaptor_info * ACTION_wftk_get_info(void); struct adaptor_info * ACTION_system_get_info(void); struct adaptor_info * NOTIFY_smtp_get_info(void); struct adaptor_info * DATASTORE_role_get_info(void); struct adaptor_info * DATATYPE_option_get_info(void); |
WFTK_ADAPTOR * config_get_adaptor (void * session, int adaptor_class, char * adaptor_descriptor, int name_length) { struct adaptor_info * ai = (struct adaptor_info *) 0; WFTK_ADAPTOR * ret; switch (adaptor_class) { case DSREP: if (!name_length || (name_length == 8 && !strncmp ("localxml", adaptor_descriptor, 8))) { ai = DSREP_localxml_get_info(); } break; case DATASTORE: if (name_length == 4 && (!strncmp ("role", adaptor_descriptor, 4))) { ai = DATASTORE_role_get_info(); } break; case DATATYPE: if (name_length == 6 && (!strncmp ("option", adaptor_descriptor, 6))) { ai = DATATYPE_option_get_info(); } break; case PDREP: if (!name_length || (name_length == 8 && !strncmp ("localxml", adaptor_descriptor, 8))) { ai = PDREP_localxml_get_info(); } break; case USER: if (!name_length || (name_length == 8 && !strncmp ("localxml", adaptor_descriptor, 8))) { ai = USER_localxml_get_info(); } break; case PERMS: /* Perms are different -- the caller gets no choice. Otherwise I figure we're in trouble, security-wise. Probably are anyway. */ ai = PERMS_localxml_get_info(); break; case TASKINDEX: if (name_length == 6 && !strncmp ("stdout", adaptor_descriptor, 6)) { ai = TASKINDEX_stdout_get_info(); break; } if (!name_length || (name_length == 4 && !strncmp ("odbc", adaptor_descriptor, 4))) { ai = TASKINDEX_odbc_get_info(); } break; case NOTIFY: if (!name_length || (name_length == 4 && !strncmp ("smtp", adaptor_descriptor, 4))) { ai = NOTIFY_smtp_get_info(); } break; case ACTION: if (name_length == 6 && !strncmp ("system", adaptor_descriptor, 6)) { ai = ACTION_system_get_info(); break; } if (!name_length || (name_length == 4 && !strncmp ("wftk", adaptor_descriptor, 4))) { ai = ACTION_wftk_get_info(); } break; case DEBUG_MSG: break; default: return (WFTK_ADAPTOR *) 0; } if (!ai) return (WFTK_ADAPTOR *) 0; /* This signifies an unknown (or at least unimplemented) adaptor class. */ ret = (WFTK_ADAPTOR *) malloc (sizeof (struct wftk_adaptor) + ai->nfuncs * sizeof (void *)); if (!ret) return (WFTK_ADAPTOR *) 0; ret->num = adaptor_class; ret->parms = (void *) 0; /* This will be filled in by the caller. */ ret->nfuncs = ai->nfuncs; ret->names = ai->names; ret->vtab = ai->vtab; ret->session = session; return (ret); } |
WFTK_ADAPTORLIST * config_get_adaptorlist (void * session, int adaptor_class) { const char * spec = ""; int adaptors = 1; int i; const char * mark; char * mark2; char adaptorbuffer[256]; /* TODO: another dang static buffer. Fix it. */ WFTK_ADAPTORLIST * list; switch (adaptor_class) { case TASKINDEX: spec = config_get_value (session, "taskindex.always"); break; case NOTIFY: spec = config_get_value (session, "notify.always"); break; default: return (WFTK_ADAPTORLIST *) 0; } if (!*spec) return (WFTK_ADAPTORLIST *) 0; /* First pass: count semicolons, so we know how large a list structure to allocate. */ mark = spec; do { mark = strchr (mark, ';'); if (!mark) break; adaptors++; mark++; } while (mark); list = (WFTK_ADAPTORLIST *) malloc (sizeof (WFTK_ADAPTOR_LIST) + adaptors * sizeof (WFTK_ADAPTOR *)); list->count = adaptors; for (i=0, mark = spec; i < adaptors; i++) { strcpy (adaptorbuffer, mark); mark = strchr(mark, ';'); if (mark) { mark++; while (*mark == ' ') mark++; } mark2 = strchr (adaptorbuffer, ';'); if (mark2) *mark2 = '\0'; list->ads[i] = wftk_get_adaptor (session, adaptor_class, adaptorbuffer); } return (list); } |
switch
we need a bunch of string comparisons. Sorry. The smarter
config module will presumably just pass this off to some API (the canonical one being the Windows Registry, of course.)
This function itself uses the definitions in the localdefs.h file. That seems weird -- why not just include the values
right here? -- but it's more natural to look for config values in a .h file than in a .c file, so I think that makes more
sense for the time being. At any rate, with any luck that's going to be superseded relatively quickly anyway. Right?
And wow -- I superseded it before I even finished the release. It was just too stupid. The compiled values will still
be there as fallbacks in case you want to run sans config.xml, but we'll go ahead and read config.xml.
XML * config_find_option (XML * xml, const char * name) { int len; XML * x; char * mark = strchr (name, '.'); if (mark) len = mark - name; else len = strlen (name); x = xml_firstelem (xml); while (x) { if (!strncmp (xml_attrval (x, "name"), name, len) || !strncmp (xml_attrval (x, "id"), name, len) || !strncmp ("?", name, len)) { if (mark) { return (config_find_option (x, mark + 1)); } return (x); } x = xml_nextelem (x); } return NULL; } XML * config_get_option (void * session, const char * valuename) { WFTK_SESSION * sess = session; if (sess) { if (sess->config) { return (config_find_option (sess->config, valuename)); } } return NULL; } const char * config_get_value (void * session, const char * valuename) { XML * mark = config_get_option (session, valuename); if (mark) return (xml_attrval (mark, "value")); if (!strcmp (valuename, "pdrep.localxml.directory")) return PROCDEF_DIRECTORY; if (!strcmp (valuename, "dsrep.localxml.directory")) return DATASHEET_DIRECTORY; if (!strcmp (valuename, "user.localxml.directory")) return USER_DIRECTORY; if (!strcmp (valuename, "group.localxml.directory")) return GROUP_DIRECTORY; if (!strcmp (valuename, "taskindex.odbc.?.conn")) return ODBC_CONNECTION; return ""; } |
void config_debug_message (char type, const char * message, ...) { va_list arglist; va_start (arglist, message); printf ("DEBUG %c:", type); vprintf (message, arglist); printf ("\n"); va_end (arglist); } |
This code and documentation are released under the terms of the GNU license. They are additionally copyright (c) 2000, Vivtek. All rights reserved except those explicitly granted under the terms of the GNU license. This presentation was prepared with LPML. Try literate programming. You'll like it. |