diff options
Diffstat (limited to 'src/actionparser.c')
| -rw-r--r-- | src/actionparser.c | 219 |
1 files changed, 117 insertions, 102 deletions
diff --git a/src/actionparser.c b/src/actionparser.c index ac01b84..207a089 100644 --- a/src/actionparser.c +++ b/src/actionparser.c @@ -18,44 +18,48 @@ /* accepted commands */ /* [0] is the count */ -const char* const strINIT[] = {"2", "init", "-i"}; -const char* const strADD[] = {"2", "add", "-a"}; -const char* const strDEL[] = {"2", "del", "-d"}; -const char* const strEDIT[] = {"3", "edit", "e", "-e"}; -const char* const strLIST[] = {"3", "list", "ls", "-ls"}; -const char* const strSEARCH[] = {"3", "search", "s", "-s"}; -const char* const strHELP[] = {"4", "help", "?", "-h", "--help"}; +const char* const strINIT[] = {"2", "init", "-i"}; +const char* const strADD[] = {"2", "add", "-a"}; +const char* const strDEL[] = {"2", "del", "-d"}; +const char* const strEDIT[] = {"3", "edit", "e", "-e"}; +const char* const strLIST[] = {"3", "list", "ls", "-ls"}; +const char* const strSEARCH[] = {"3", "search", "s", "-s"}; +const char* const strHELP[] = {"4", "help", "?", "-h", "--help"}; const char* const strConfDir[] = {"3", "config", "conf", "-c"}; /* Number of opts */ static int optNum; + /* holds the list of the opts - as given by the user */ + * as given by the user */ static char **opts; + /* points to the current token */ static char *token; -/* points to the position - * to be read */ + +/* the position to be read */ static int pos = 0; /* Reads the next token and returns it's position * Returns -1 otherwise */ -int nextToken() { +int next_token() { if (pos < optNum) { token = opts[pos]; return pos++; } else { - token = ""; + token = NULL; return -1; } } -void getOpt(int position, UserOpt *opt) { - // get arg - nextToken(); +/* copy the option from the list + * to the UserOpt struct */ +void get_opt(int position, UserOpt *opt) { + /* get arg */ + next_token(); - // allocate memory + /* allocate memory */ opt->argv[position] = (char *)malloc((strlen(token))*sizeof(char) + 1); strcpy(opt->argv[position], token); } @@ -65,8 +69,8 @@ void getOpt(int position, UserOpt *opt) { * like so "ck ACTION ..." * ^ */ int parse_INIT(UserOpt *opt) { - // INIT expects 2 arguments - // starting from 0 + /* INIT expects 2 arguments + * starting from 0 */ opt->argc = 2; if (optNum != pos /* already consumed */ + opt->argc) { opt->err = PERR_INIT_WRONG; @@ -74,13 +78,13 @@ int parse_INIT(UserOpt *opt) { } for (int i = 0; i < opt->argc; i++) { - getOpt(i, opt); + get_opt(i, opt); } return 1; } int parse_ADD(UserOpt *opt) { - // ADD expects 2 to 4 arguments + /* ADD expects 2 to 4 arguments */ if (optNum <= pos + 1 || optNum > pos + 4) { opt->err = PERR_ADD_WRONG; @@ -89,7 +93,7 @@ int parse_ADD(UserOpt *opt) { opt->argc = optNum - pos; for (int i = 0; i < opt->argc; i++) { - getOpt(i, opt); + get_opt(i, opt); } return 1; } @@ -111,7 +115,7 @@ int parse_HELP(UserOpt *opt) { } -int parseVals(UserOpt *opt) { +int parse_vals(UserOpt *opt) { switch (opt->action) { #define X(ACTION) \ case CKA_##ACTION: \ @@ -123,17 +127,26 @@ int parseVals(UserOpt *opt) { } } -CkAction determineAction() { - int i = 0; +void determine_action(UserOpt *opt) { + /* get action */ + if (next_token() == -1) { + opt->action = CK_WRONG_ACTION; + return; + } + + int i; #define X(ACTION) \ for (i = 1; i < atoi(str##ACTION[0]) + 1; i++) { \ if (strcmp(token, str##ACTION[i]) == 0) { \ - return CKA_##ACTION; \ + opt->action = CKA_##ACTION; \ + return; \ } \ } - CK_ACTIONS + CK_ACTIONS; #undef X - return CK_WRONG_ACTION; + + opt->action = CK_WRONG_ACTION; + return; } UserOpt make_empty_user_opt() { @@ -148,24 +161,29 @@ UserOpt make_empty_user_opt() { return opt; } + +/* called to free the resources + * UserOpt holds */ void free_user_opt(UserOpt *opt) { for (int i = 0; i < 10; i++) { if (opt->argv[i] != NULL) { free(opt->argv[i]); - } + } } if (opt->confDir != NULL) { free(opt->confDir); } } -void getConfig(UserOpt *opt) { - // get first token - nextToken(); - int ok = 1; +/* If the used has specified a config file other + * than the default get it now */ +void get_config(UserOpt *opt) { + /* get first token */ + next_token(); + for (int i = 1; i < atoi(strConfDir[0]) + 1; i++) { if (strcmp(token, strConfDir[i]) == 0) { - if (nextToken() == -1) { + if (next_token() == -1) { printf("Config needs a value\n"); exit(1); } @@ -196,74 +214,33 @@ void getConfig(UserOpt *opt) { token = opts[pos]; } -ParseResult parseAction(int argc, char* argv[], UserOpt *opt) { - *opt = make_empty_user_opt(); - if (argc < 2) { - return OPR_HELP; - } - opts = argv; - optNum = argc; - - // skip the program nake - nextToken(); - - getConfig(opt); - // get action - nextToken(); - opt->action = determineAction(); - if (opt->action == CK_WRONG_ACTION) { - opt->err = PERR_UNKONW_ACTION; - return OPR_ERR; - } - if (opt->action == CKA_HELP) { - return OPR_HELP; - } - - // parse values - if (!parseVals(opt)) { - return OPR_ERR; - } - - if (opt->err == PERR_NOERR) { - return OPR_OK; - } - else { - return OPR_ERR; - } -} - -void getPossibleActionNames(char * dest, CkAction ckAction) { - if (ckAction == -1) { - dest = NULL; - return; - } - +void get_possible_action_strings(char *dest, CkAction ckAction) { char buf[STR_S]; - switch (ckAction) { #define X(ACTION) \ case CKA_##ACTION: \ - strcpy(buf, "{ "); \ - for (int i = 1; i < atoi(str##ACTION[0]); i++) { \ - strcat(buf, str##ACTION[i]); \ - strcat(buf, ", "); \ - } \ - strcat(buf, str##ACTION[atoi(str##ACTION[0])]); \ - strcat(buf, " }"); \ - break; + strcpy(buf, "{ "); \ + for (int i = 1; i < atoi(str##ACTION[0]); i++) { \ + strcat(buf, str##ACTION[i]); \ + strcat(buf, ", "); \ + } \ + strcat(buf, str##ACTION[atoi(str##ACTION[0])]); \ + strcat(buf, " }"); \ + break; CK_ACTIONS #undef X default: - break; + dest = NULL; + return; } strcpy(dest, buf); } -void printParserError(UserOpt *opt) { +void print_parser_error(UserOpt *opt) { char errStr[STR_M]; char names[STR_S]; - getPossibleActionNames(names, opt->action); + get_possible_action_strings(names, opt->action); switch (opt->err) { case PERR_NOERR: @@ -296,22 +273,60 @@ void printParserError(UserOpt *opt) { printf("Parsing error\n%s\n", errStr); } -void printParserHelp() { +void print_parser_help() { char names[STR_S]; printf("ck - the config keeper\n"); printf("Usage:\n"); - getPossibleActionNames(names, CKA_INIT); - printf("Initialize: \t%s\n", names); - getPossibleActionNames(names, CKA_ADD); - printf("Add config: \t%s\n", names); - getPossibleActionNames(names, CKA_DEL); - printf("Delete config: \t%s\n", names); - getPossibleActionNames(names, CKA_EDIT); - printf("Edit config: \t%s\n", names); - getPossibleActionNames(names, CKA_LIST); - printf("List configs: \t%s\n", names); - getPossibleActionNames(names, CKA_SEARCH); - printf("Search: \t%s\n", names); - getPossibleActionNames(names, CKA_HELP); - printf("Print this: \t%s\n", names); + get_possible_action_strings(names, CKA_INIT); + printf("Initialize: \t%s\n", names); + get_possible_action_strings(names, CKA_ADD); + printf("Add config: \t%s\n", names); + get_possible_action_strings(names, CKA_DEL); + printf("Delete config: \t%s\n", names); + get_possible_action_strings(names, CKA_EDIT); + printf("Edit config: \t%s\n", names); + get_possible_action_strings(names, CKA_LIST); + printf("List configs: \t%s\n", names); + get_possible_action_strings(names, CKA_SEARCH); + printf("Search: \t%s\n", names); + get_possible_action_strings(names, CKA_HELP); + printf("Print this: \t%s\n", names); +} + +ActionParseResult parse_action(int argc, char* argv[], UserOpt *opt) { + /* make empty user opt */ + *opt = make_empty_user_opt(); + if (argc < 2) { + return APR_HELP; + } + opts = argv; + optNum = argc; + + /* skip the program name */ + next_token(); + + /* figure what is the config file */ + get_config(opt); + + /* find the action */ + determine_action(opt); + if (opt->action == CK_WRONG_ACTION) { + opt->err = PERR_UNKONW_ACTION; + return APR_ERR; + } + if (opt->action == CKA_HELP) { + return APR_HELP; + } + + // parse values + if (!parse_vals(opt)) { + return APR_ERR; + } + + if (opt->err == PERR_NOERR) { + return APR_OK; + } + else { + return APR_ERR; + } } |