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https://github.com/servalproject/serval-dna.git
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7f52ac0ae3
Support prefix<any>, prefix=<any>, prefix <any>, [prefix<any>], [prefix=<any>] and [prefix <any>] argument syntax forms. Support [arg]... optional repeated argument syntax.
266 lines
8.2 KiB
C
266 lines
8.2 KiB
C
#include <stdio.h>
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#include <strings.h>
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#include "cli.h"
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#include "log.h"
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#include "serval.h"
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#include "rhizome.h"
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int cli_usage(const struct command_line_option *commands) {
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printf("Usage:\n");
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int i,j;
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for(i=0;commands[i].function;i++) {
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for(j=0;commands[i].words[j];j++)
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printf(" %s",commands[i].words[j]);
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printf("\n %s\n",commands[i].description);
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}
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return 0;
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}
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int cli_parse(const int argc, const char *const *args, const struct command_line_option *commands, struct parsed_command *parsed)
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{
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int ambiguous = 0;
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int matched_cmd = -1;
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int cmd;
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for (cmd = 0; commands[cmd].function; ++cmd) {
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struct parsed_command cmdpa;
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memset(&cmdpa, 0, sizeof cmdpa);
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cmdpa.command = &commands[cmd];
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cmdpa.args = args;
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cmdpa.argc = argc;
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cmdpa.labelc = 0;
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cmdpa.varargi = -1;
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const char *word = NULL;
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unsigned arg = 0;
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unsigned opt = 0;
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while ((word = commands[cmd].words[opt])) {
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//DEBUGF("cmd=%d opt=%d word='%s' args[arg=%d]='%s'", cmd, opt, word, arg, arg < argc ? args[arg] : "");
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unsigned wordlen = strlen(word);
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if (cmdpa.varargi != -1)
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return WHYF("Internal error: commands[%d].word[%d]=\"%s\" - more words not allowed after \"...\"", cmd, opt, word);
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/* These are the argument matching rules:
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*
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* "..." consumes all remaining arguments
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*
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* "word" consumes one argument that exactly matches "word", does not label it
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*
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* "<label>" consumes exactly one argument "ANY", records it with label "label"
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*
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* "prefix=<any>" consumes one argument "prefix=ANY" or two arguments "prefix" "ANY",
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* and records the text matching ANY with label "prefix"
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*
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* "prefix <any>" consumes one argyment "prefix ANY" if available or two arguments "prefix"
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* "ANY", and records the text matching ANY with label "prefix"
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*
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* "prefix<any>" consumes one argument "prefixANY", and records the text matching ANY with
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* label "prefix"
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*
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* "[<label>]" consumes one argument "ANY" if available, records it with label "label"
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*
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* "[prefix=<any>]" consumes one argument "prefix=ANY" if available or two arguments
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* "prefix" "ANY" if available, records the text matching ANY with label "prefix"
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*
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* "[prefix <any>]" consumes one argument "prefix ANY" if available or two arguments
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* "prefix" "ANY" if available, records the text matching ANY with label "prefix"
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*
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* "[prefix<any>]" consumes one argument "prefixANY" if available, records the text matching
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* ANY with label "prefix"
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*
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* "[word]" consumes one argument if it exactly matches "word", records it with label
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* "word"
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*/
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if (wordlen == 3 && word[0] == '.' && word[1] == '.' && word[2] == '.') {
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cmdpa.varargi = arg;
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arg = argc;
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++opt;
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} else {
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int optional = 0;
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int repeating = 0;
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if (wordlen > 5 && word[0] == '[' && word[wordlen-4] == ']' && word[wordlen-3] == '.' && word[wordlen-2] == '.' && word[wordlen-1] == '.') {
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optional = repeating = 1;
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word += 1;
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wordlen -= 5;
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}
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else if (wordlen > 2 && word[0] == '[' && word[wordlen-1] == ']') {
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optional = 1;
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word += 1;
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wordlen -= 2;
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}
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const char *prefix = NULL;
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unsigned prefixlen = 0;
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char prefixarglen = 0;
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const char *label = NULL;
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unsigned labellen = 0;
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const char *text = NULL;
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const char *caret = strchr(word, '<');
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unsigned oarg = arg;
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if (wordlen > 2 && caret && word[wordlen-1] == '>') {
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if ((prefixarglen = prefixlen = caret - word)) {
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prefix = word;
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if (prefixlen > 1 && (prefix[prefixlen-1] == '=' || prefix[prefixlen-1] == ' '))
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--prefixarglen;
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label = prefix;
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labellen = prefixarglen;
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if (arg < argc) {
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unsigned arglen = strlen(args[arg]);
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if (arglen >= prefixlen && strncmp(args[arg], prefix, prefixlen) == 0) {
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text = args[arg++] + prefixlen;
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} else if (arg + 1 < argc && arglen == prefixarglen && strncmp(args[arg], prefix, prefixarglen) == 0) {
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++arg;
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text = args[arg++];
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}
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}
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} else {
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label = &word[1];
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labellen = wordlen - 2;
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if (arg < argc)
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text = args[arg++];
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}
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} else if (arg < argc && strlen(args[arg]) == wordlen && strncmp(args[arg], word, wordlen) == 0) {
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if (optional) {
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text = args[arg];
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label = word;
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labellen = wordlen;
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}
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++arg;
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}
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if (arg == oarg && !optional)
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break;
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if (labellen && text) {
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if (cmdpa.labelc >= NELS(cmdpa.labelv))
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return WHYF("Internal error: commands[%d].word[%d]=\"%s\" - label limit exceeded", cmd, opt, word);
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cmdpa.labelv[cmdpa.labelc].label = label;
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cmdpa.labelv[cmdpa.labelc].len = labellen;
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cmdpa.labelv[cmdpa.labelc].text = text;
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++cmdpa.labelc;
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if (!repeating)
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++opt;
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} else
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++opt;
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}
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}
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//DEBUGF("cmd=%d opt=%d args[arg=%d]='%s'", cmd, opt, arg, arg < argc ? args[arg] : "");
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if (!word && arg == argc) {
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/* A match! We got through the command definition with no internal errors and all literal
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args matched and we have a proper number of args. If we have multiple matches, then note
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that the call is ambiguous. */
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if (matched_cmd >= 0)
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++ambiguous;
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if (ambiguous == 1) {
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WHY("Ambiguous command line call:");
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WHY_argv(" ", argc, args);
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WHY("Matches the following known command line calls:");
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WHY_argv(" ", argc, commands[matched_cmd].words);
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}
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if (ambiguous)
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WHY_argv(" ", argc, commands[cmd].words);
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matched_cmd = cmd;
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*parsed = cmdpa;
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}
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}
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/* Don't process ambiguous calls */
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if (ambiguous)
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return -1;
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/* Complain if we found no matching calls */
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if (matched_cmd < 0) {
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if (argc) {
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WHY("Unknown command line call:");
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WHY_argv(" ", argc, args);
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}
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INFO("Use \"help\" command to see a list of valid commands");
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return -1;
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}
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return matched_cmd;
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}
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void _debug_parsed(struct __sourceloc __whence, const struct parsed_command *parsed)
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{
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DEBUG_argv("command", parsed->argc, parsed->args);
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strbuf b = strbuf_alloca(1024);
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int i;
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for (i = 0; i < parsed->labelc; ++i) {
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const struct labelv *lab = &parsed->labelv[i];
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strbuf_sprintf(b, " %s=%s", alloca_toprint(-1, lab->label, lab->len), alloca_str_toprint(lab->text));
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}
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if (parsed->varargi >= 0)
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strbuf_sprintf(b, " varargi=%d", parsed->varargi);
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DEBUGF("parsed%s", strbuf_str(b));
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}
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int cli_invoke(const struct parsed_command *parsed, void *context)
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{
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IN();
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int ret = parsed->command->function(parsed, context);
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RETURN(ret);
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}
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int cli_arg(const struct parsed_command *parsed, char *label, const char **dst, int (*validator)(const char *arg), char *defaultvalue)
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{
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int labellen = strlen(label);
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if (dst)
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*dst = defaultvalue;
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int i;
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for (i = 0; i < parsed->labelc; ++i) {
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if (parsed->labelv[i].len == labellen && strncasecmp(label, parsed->labelv[i].label, labellen) == 0) {
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const char *value = parsed->labelv[i].text;
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if (validator && !(*validator)(value))
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return WHYF("Invalid argument %d '%s': \"%s\"", i + 1, label, value);
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if (dst)
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*dst = value;
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return 0;
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}
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}
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/* No matching valid argument was found, so return default value. It might seem that this should
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never happen, but it can because more than one version of a command line option may exist, one
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with a given argument and another without, and allowing a default value means we can have a
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single function handle both in a fairly simple manner. */
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return 1;
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}
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int cli_lookup_did(const char *text)
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{
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return text[0] == '\0' || strcmp(text, "*") == 0 || str_is_did(text);
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}
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int cli_absolute_path(const char *arg)
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{
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return arg[0] == '/' && arg[1] != '\0';
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}
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int cli_optional_sid(const char *arg)
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{
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return !arg[0] || str_is_subscriber_id(arg);
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}
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int cli_optional_bundle_key(const char *arg)
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{
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return !arg[0] || rhizome_str_is_bundle_key(arg);
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}
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int cli_manifestid(const char *arg)
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{
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return rhizome_str_is_manifest_id(arg);
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}
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int cli_fileid(const char *arg)
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{
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return rhizome_str_is_file_hash(arg);
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}
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int cli_optional_bundle_crypt_key(const char *arg)
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{
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return !arg[0] || rhizome_str_is_bundle_crypt_key(arg);
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}
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int cli_uint(const char *arg)
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{
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register const char *s = arg;
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while (isdigit(*s++))
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;
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return s != arg && *s == '\0';
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}
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int cli_optional_did(const char *text)
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{
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return text[0] == '\0' || str_is_did(text);
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}
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