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/* |
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* confparse.C: Parsing of the configuration file. |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are as documented in COPYING. |
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* |
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* |
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* Portions of this file were derived from sources bearing the following license: |
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* Rights to this code are documented in doc/pod/license.pod. |
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* Copyright © 2005-2007 Atheme Project (http://www.atheme.org) |
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*/ |
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|
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static char const rcsid[] = "$Id: confparse.C,v 1.8 2007-09-16 18:54:44 pippijn Exp $"; |
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|
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#include "atheme.h" |
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#include "confparse.h" |
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|
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static void |
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config_entry_free (config_entry_t *ceptr) |
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{ |
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config_entry_t *nptr; |
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|
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for (; ceptr; ceptr = nptr) |
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{ |
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nptr = ceptr->ce_next; |
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if (ceptr->ce_entries) |
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config_entry_free (ceptr->ce_entries); |
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if (ceptr->ce_varname) |
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sfree (ceptr->ce_varname); |
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if (ceptr->ce_vardata) |
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sfree (ceptr->ce_vardata); |
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delete ceptr; |
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} |
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} |
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|
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void |
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config_free (config_file_t *cfptr) |
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{ |
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config_file_t *nptr; |
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|
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for (; cfptr; cfptr = nptr) |
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{ |
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nptr = cfptr->cf_next; |
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if (cfptr->cf_entries) |
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config_entry_free (cfptr->cf_entries); |
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if (cfptr->cf_filename) |
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sfree (cfptr->cf_filename); |
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delete cfptr; |
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} |
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} |
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|
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|
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static void |
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config_error (char const * const format, ...) |
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{ |
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va_list ap; |
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char buffer[1024]; |
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char *ptr; |
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|
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va_start (ap, format); |
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vsnprintf (buffer, 1024, format, ap); |
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va_end (ap); |
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if ((ptr = strchr (buffer, '\n')) != NULL) |
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*ptr = '\0'; |
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slog (LG_ERROR, "config_parse(): %s", buffer); |
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} |
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|
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static config_file_t * |
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config_parse (char *filename, char *confdata) |
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{ |
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char *ptr; |
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char *start; |
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int linenumber = 1; |
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config_entry_t *curce; |
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config_entry_t **lastce; |
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config_entry_t *cursection; |
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|
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config_file_t *curcf; |
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config_file_t *lastcf; |
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|
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lastcf = curcf = new config_file_t; |
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curcf->cf_filename = sstrdup (filename); |
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lastce = &(curcf->cf_entries); |
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curce = NULL; |
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cursection = NULL; |
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|
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for (ptr = confdata; *ptr; ptr++) |
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{ |
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switch (*ptr) |
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{ |
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case '#': |
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while (*++ptr && (*ptr != '\n')) |
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; |
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if (!*ptr) |
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{ |
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/* make for(;;) exit from the loop */ |
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ptr--; |
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continue; |
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} |
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linenumber++; |
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break; |
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case ';': |
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if (!curce) |
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{ |
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config_error ("%s:%i Ignoring extra semicolon\n", filename, linenumber); |
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break; |
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} |
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if (!strcmp (curce->ce_varname, "include")) |
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{ |
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config_file_t *cfptr; |
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|
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if (!curce->ce_vardata) |
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{ |
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config_error ("%s:%i Ignoring \"include\": No filename given\n", filename, linenumber); |
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config_entry_free (curce); |
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curce = NULL; |
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continue; |
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} |
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if (strlen (curce->ce_vardata) > 255) |
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curce->ce_vardata[255] = '\0'; |
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cfptr = config_load (curce->ce_vardata); |
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if (cfptr) |
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{ |
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lastcf->cf_next = cfptr; |
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lastcf = cfptr; |
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} |
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config_entry_free (curce); |
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curce = NULL; |
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continue; |
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} |
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*lastce = curce; |
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lastce = &(curce->ce_next); |
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curce->ce_fileposend = (ptr - confdata); |
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curce = NULL; |
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break; |
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case '{': |
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if (!curce) |
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{ |
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config_error ("%s:%i: No name for section start\n", filename, linenumber); |
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continue; |
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} |
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else if (curce->ce_entries) |
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{ |
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config_error ("%s:%i: Ignoring extra section start\n", filename, linenumber); |
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continue; |
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} |
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curce->ce_sectlinenum = linenumber; |
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lastce = &(curce->ce_entries); |
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cursection = curce; |
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curce = NULL; |
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break; |
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case '}': |
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if (curce) |
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{ |
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config_error ("%s:%i: Missing semicolon before close brace\n", filename, linenumber); |
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config_entry_free (curce); |
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config_free (curcf); |
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return NULL; |
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} |
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else if (!cursection) |
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{ |
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config_error ("%s:%i: Ignoring extra close brace\n", filename, linenumber); |
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continue; |
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} |
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curce = cursection; |
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cursection->ce_fileposend = (ptr - confdata); |
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cursection = cursection->ce_prevlevel; |
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if (!cursection) |
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lastce = &(curcf->cf_entries); |
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else |
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lastce = &(cursection->ce_entries); |
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for (; *lastce; lastce = &((*lastce)->ce_next)) |
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continue; |
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break; |
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case '/': |
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if (*(ptr + 1) == '/') |
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{ |
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ptr += 2; |
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while (*ptr && (*ptr != '\n')) |
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ptr++; |
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if (!*ptr) |
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break; |
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ptr--; /* grab the \n on next loop thru */ |
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continue; |
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} |
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else if (*(ptr + 1) == '*') |
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{ |
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int commentstart = linenumber; |
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|
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for (ptr += 2; *ptr; ptr++) |
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{ |
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if ((*ptr == '*') && (*(ptr + 1) == '/')) |
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{ |
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ptr++; |
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break; |
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} |
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else if (*ptr == '\n') |
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linenumber++; |
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} |
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if (!*ptr) |
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{ |
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config_error ("%s:%i Comment on this line does not end\n", filename, commentstart); |
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config_entry_free (curce); |
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config_free (curcf); |
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return NULL; |
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} |
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} |
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break; |
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case '\"': |
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start = ++ptr; |
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for (; *ptr; ptr++) |
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{ |
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if ((*ptr == '\\') && (*(ptr + 1) == '\"')) |
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{ |
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char *tptr = ptr; |
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while ((*tptr = *(tptr + 1))) |
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tptr++; |
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} |
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else if ((*ptr == '\"') || (*ptr == '\n')) |
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break; |
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} |
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if (!*ptr || (*ptr == '\n')) |
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{ |
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config_error ("%s:%i: Unterminated quote found\n", filename, linenumber); |
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config_entry_free (curce); |
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config_free (curcf); |
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return NULL; |
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} |
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if (curce) |
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{ |
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if (curce->ce_vardata) |
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config_error ("%s:%i: Ignoring extra data\n", filename, linenumber); |
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else |
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{ |
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char *eptr; |
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|
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curce->ce_vardata = salloc<char> (ptr - start + 1); |
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strlcpy (curce->ce_vardata, start, ptr - start + 1); |
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curce->ce_vardatanum = strtol (curce->ce_vardata, &eptr, 0) & 0xffffffff; /* we only want 32bits and long is 64bit on 64bit compiles */ |
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if (eptr != (curce->ce_vardata + (ptr - start))) |
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curce->ce_vardatanum = 0; |
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} |
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} |
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else |
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{ |
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curce = new config_entry_t; |
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curce->ce_varname = salloc<char> (ptr - start + 1); |
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strlcpy (curce->ce_varname, start, ptr - start + 1); |
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curce->ce_varlinenum = linenumber; |
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curce->ce_fileptr = curcf; |
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curce->ce_prevlevel = cursection; |
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curce->ce_fileposstart = (start - confdata); |
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} |
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break; |
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case '\n': |
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linenumber++; |
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break; |
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case '\t': |
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case ' ': |
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case '=': |
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case '\r': |
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break; |
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default: |
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if ((*ptr == '*') && (*(ptr + 1) == '/')) |
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{ |
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config_error ("%s:%i Ignoring extra end comment\n", filename, linenumber); |
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ptr++; |
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break; |
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} |
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start = ptr; |
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for (; *ptr; ptr++) |
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{ |
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if ((*ptr == ' ') || (*ptr == '\t') || (*ptr == '\n') || (*ptr == ';')) |
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break; |
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} |
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if (!*ptr) |
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{ |
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if (curce) |
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config_error ("%s: Unexpected EOF for variable starting at %i\n", filename, curce->ce_varlinenum); |
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else if (cursection) |
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config_error ("%s: Unexpected EOF for section starting at %i\n", filename, curce->ce_sectlinenum); |
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else |
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config_error ("%s: Unexpected EOF.\n", filename); |
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config_entry_free (curce); |
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config_free (curcf); |
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return NULL; |
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} |
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if (curce) |
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{ |
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if (curce->ce_vardata) |
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{ |
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config_error ("%s:%i: Ignoring extra data\n", filename, linenumber); |
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} |
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else |
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{ |
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char *eptr; |
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|
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curce->ce_vardata = salloc<char> (ptr - start + 1); |
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strlcpy (curce->ce_vardata, start, ptr - start + 1); |
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curce->ce_vardatanum = strtol (curce->ce_vardata, &eptr, 0) & 0xffffffff; /* we only want 32bits and long is 64bit on 64bit compiles */ |
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if (eptr != (curce->ce_vardata + (ptr - start))) |
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{ |
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curce->ce_vardatanum = 0; |
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} |
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} |
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} |
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else |
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{ |
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curce = new config_entry_t; |
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curce->ce_varname = salloc<char> (ptr - start + 1); |
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strlcpy (curce->ce_varname, start, ptr - start + 1); |
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curce->ce_varlinenum = linenumber; |
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curce->ce_fileptr = curcf; |
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curce->ce_prevlevel = cursection; |
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curce->ce_fileposstart = (start - confdata); |
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} |
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if ((*ptr == ';') || (*ptr == '\n')) |
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ptr--; |
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break; |
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} /* switch */ |
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} /* for */ |
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if (curce) |
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{ |
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config_error ("%s: Unexpected EOF for variable starting on line %i\n", filename, curce->ce_varlinenum); |
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config_entry_free (curce); |
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config_free (curcf); |
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return NULL; |
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} |
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else if (cursection) |
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{ |
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config_error ("%s: Unexpected EOF for section starting on line %i\n", filename, cursection->ce_sectlinenum); |
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config_free (curcf); |
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return NULL; |
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} |
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return curcf; |
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} |
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|
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config_file_t * |
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config_load (char *filename) |
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{ |
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struct stat sb; |
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FILE *fd; |
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int ret; |
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char *buf = NULL; |
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config_file_t *cfptr; |
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|
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fd = fopen (filename, "rb"); |
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if (!fd) |
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{ |
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config_error ("Couldn't open \"%s\": %s\n", filename, strerror (errno)); |
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return NULL; |
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} |
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if (stat (filename, &sb) == -1) |
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{ |
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config_error ("Couldn't fstat \"%s\": %s\n", filename, strerror (errno)); |
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fclose (fd); |
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return NULL; |
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} |
| 359 |
if (!sb.st_size) |
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{ |
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fclose (fd); |
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return NULL; |
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} |
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buf = salloc<char> (sb.st_size + 1); |
| 365 |
if (buf == NULL) |
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{ |
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config_error ("Out of memory trying to load \"%s\"\n", filename); |
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fclose (fd); |
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return NULL; |
| 370 |
} |
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ret = fread (buf, 1, sb.st_size, fd); |
| 372 |
if (ret != sb.st_size) |
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{ |
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config_error ("Error reading \"%s\": %s\n", filename, ret == -1 ? strerror (errno) : strerror (EFAULT)); |
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sfree (buf); |
| 376 |
fclose (fd); |
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return NULL; |
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} |
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buf[ret] = '\0'; |
| 380 |
fclose (fd); |
| 381 |
cfptr = config_parse (filename, buf); |
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sfree (buf); |
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return cfptr; |
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} |
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|
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config_entry_t * |
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config_find (config_entry_t *ceptr, char *name) |
| 388 |
{ |
| 389 |
for (; ceptr; ceptr = ceptr->ce_next) |
| 390 |
if (!strcmp (ceptr->ce_varname, name)) |
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break; |
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return ceptr; |
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} |
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|
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/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs |
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* vim:ts=8 |
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* vim:sw=8 |
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* vim:noexpandtab |
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*/ |
