/**
* Parse the command line arguments for options.
*
* This function iterates through the command line arguments looking
* for options which have been defined. Each option encountered is
* handled according to its type.
*
* @param argc The number of arguments.
* @param argv The array of argument strings.
*
* @see @link DOXGRP_OPT Command Line Option Parser @endlink
* @ingroup DOXGRP_OPT
*/
void
spifopt_parse(int argc, char *argv[])
{
spif_int32_t i, j;
spif_charptr_t opt;
REQUIRE(argc > 1);
REQUIRE(argv != NULL);
/* Process each command line arg one-by-one. */
for (i = 1, opt = SPIF_CHARPTR(argv[1]); i < argc; ) {
spif_charptr_t val_ptr = NULL;
spif_char_t islong = 0, hasequal = 0;
D_OPTIONS(("argv[%d] == \"%s\", opt == \"%s\"\n", i, argv[i], opt));
if (SPIF_PTR_ISNULL(opt)) {
/* NEXT_ARG(); */
break;
} else if (opt == SPIF_CHARPTR(argv[i])) {
/* If it's not an option, skip it. */
if (*opt != '-') {
NEXT_ARG();
} else {
opt++;
}
}
/* If the second character is also a hyphen, it's a long option. */
if (*opt == '-') {
islong = 1;
/* Skip the leading "--" */
opt++;
D_OPTIONS(("Long option detected\n"));
if ((j = find_long_option(opt)) == -1) {
NEXT_ARG();
}
} else {
if ((j = find_short_option(*opt)) == -1) {
NEXT_LETTER();
}
}
if (!SPIFOPT_FLAGS_IS_SET(SPIFOPT_SETTING_PREPARSE) && SPIFOPT_FLAGS_IS_SET(SPIFOPT_SETTING_REMOVE_ARGS)) {
argv[i] = NULL;
}
/* If a value was passed to this option, set val_ptr to point to it. */
if (islong) {
val_ptr = find_value_long(SPIF_CHARPTR(opt), SPIF_CHARPTR(argv[i + 1]), &hasequal);
} else {
val_ptr = find_value_short(opt, SPIF_CHARPTR(argv[i + 1]));
}
/* Boolean options may or may not have a value... */
if (val_ptr) {
if (SPIFOPT_OPT_IS_BOOLEAN(j) && !is_boolean_value(val_ptr)) {
val_ptr = NULL;
} else if (SPIFOPT_OPT_IS_ABSTRACT(j) && is_valid_option(val_ptr)) {
val_ptr = NULL;
}
}
if (val_ptr) {
if (val_ptr == SPIF_CHARPTR(argv[i + 1])) {
i++;
opt += strlen((char *) opt);
}
}
/* If this option is deprecated, print a warning before continuing. */
if (SPIFOPT_OPT_IS_DEPRECATED(j)) {
spif_str_t warn;
warn = spif_str_new_from_buff(SPIF_CHARPTR("The "), 128);
if (SPIFOPT_OPT_SHORT(j)) {
spif_str_append_char(warn, '-');
spif_str_append_char(warn, SPIFOPT_OPT_SHORT(j));
spif_str_append_from_ptr(warn, SPIF_CHARPTR(" / --"));
} else {
spif_str_append_from_ptr(warn, SPIF_CHARPTR("--"));
}
spif_str_append_from_ptr(warn, SPIFOPT_OPT_LONG(j));
spif_str_append_from_ptr(warn, SPIF_CHARPTR(" option is deprecated and should not be used.\n"));
libast_print_warning((char *) SPIF_STR_STR(warn));
spif_str_del(warn);
}
/* Make sure that options which require a parameter have them. */
if (SPIFOPT_OPT_NEEDS_VALUE(j)) {
if (!val_ptr) {
if (islong) {
libast_print_error("long option --%s requires a%s value\n", SPIFOPT_OPT_LONG(j),
(SPIFOPT_OPT_IS_INTEGER(j)
? ("n integer")
: (SPIFOPT_OPT_IS_STRING(j)
? " string"
: (SPIFOPT_OPT_IS_ARGLIST(j)
? "n argument list"
: ""))));
} else {
libast_print_error("option -%c requires a%s value\n", SPIFOPT_OPT_SHORT(j),
(SPIFOPT_OPT_IS_INTEGER(j)
? ("n integer")
: (SPIFOPT_OPT_IS_STRING(j)
? " string"
: (SPIFOPT_OPT_IS_ARGLIST(j)
? "n argument list"
: ""))));
}
CHECK_BAD();
continue;
}
/* Also make sure we know what to do with the value. */
if (!SPIFOPT_OPT_VALUE(j)) {
NEXT_LOOP();
}
} else if (SPIFOPT_OPT_IS_ABSTRACT(j) && !SPIFOPT_OPT_VALUE(j)) {
/* Also make sure that abstract options have a function pointer. */
NEXT_LOOP();
}
if (SPIFOPT_OPT_IS_BOOLEAN(j)) {
if (!handle_boolean(j, val_ptr, islong)) {
i--;
}
} else if (SPIFOPT_OPT_IS_STRING(j)) {
if (SHOULD_PARSE(j)) {
handle_string(j, val_ptr);
}
} else if (SPIFOPT_OPT_IS_INTEGER(j)) {
if (SHOULD_PARSE(j)) {
handle_integer(j, val_ptr);
}
} else if (SPIFOPT_OPT_IS_ARGLIST(j)) {
if (SHOULD_PARSE(j)) {
handle_arglist(j, val_ptr, hasequal, i, argc, argv);
}
if (!hasequal) {
break;
}
} else if (SPIFOPT_OPT_IS_ABSTRACT(j)) {
if (SHOULD_PARSE(j)) {
D_OPTIONS(("Abstract option detected\n"));
((spifopt_abstract_handler_t) SPIFOPT_OPT_VALUE(j))(val_ptr);
}
}
if (!SPIFOPT_FLAGS_IS_SET(SPIFOPT_SETTING_PREPARSE) && SPIFOPT_FLAGS_IS_SET(SPIFOPT_SETTING_REMOVE_ARGS)) {
argv[i] = NULL;
}
NEXT_LOOP();
}
if (SPIFOPT_FLAGS_IS_SET(SPIFOPT_SETTING_PREPARSE)) {
SPIFOPT_FLAGS_CLEAR(SPIFOPT_SETTING_PREPARSE);
} else if (SPIFOPT_FLAGS_IS_SET(SPIFOPT_SETTING_REMOVE_ARGS)) {
for (i = 1, j = 1; i < argc; i++) {
if (argv[i]) {
argv[j] = argv[i];
j++;
}
}
if (j > 1) {
argv[j] = NULL;
}
}
}
/**
* Parses the source string for the next valid token
*
* @return the next valid token in the source string
*/
Token Scanner::next() {
Token t;
if (position < source_length) {
// bypass whitespace
while (is_whitespace(source[position])) {
position++;
col_number++;
if (position == source_length) {
t.kind = END_OF_FILE;
t.line_position = line_number;
t.col_position = col_number;
return t;
}
}
// create digit
if (is_digit(source[position])) {
content_flag = true;
return handle_integer();
// create identifier
} else if (is_letter(source[position])) {
content_flag = true;
return handle_identifier();
// create symbols
} else if (is_symbol(source[position])) {
// single line comments
if (position < source_length - 1 && source[position] == '/' &&
(source[position + 1] == '/')) {
// move past comment
position += 2;
col_number += 2;
handle_single_comment();
// handle comments and stop before newline so it's handled
// out here
return next();
// block comments
} else if (position < source_length - 1 && source[position] == '/' &&
(source[position + 1] == '*')) {
// move past comment
position += 2;
col_number += 2;
// handle comments
handle_block_comments();
// return next token after comments
return next();
} else {
// don't set content flag for new_line
if (source[position] != '\n') {
content_flag = true;
}
return handle_symbol();
}
} else {
ErrorHandler::illegal_character(true, source[position], line_number, col_number);
}
}
// return EOF if we've finished the source
t.kind = END_OF_FILE;
t.line_position = line_number;
t.col_position = col_number;
return t;
}
