/*
- * UCW Library -- Parsing of command line options
+ * UCW Library -- Parsing of command-line options
*
* (c) 2013 Jan Moskyto Matejka <mq@ucw.cz>
+ * (c) 2014 Martin Mares <mj@ucw.cz>
*
* This software may be freely distributed and used according to the terms
* of the GNU Lesser General Public License.
#include <ucw/lib.h>
#include <ucw/opt.h>
-#include <ucw/conf.h>
+#include <ucw/opt-internal.h>
#include <ucw/stkstring.h>
#include <ucw/strtonum.h>
#include <alloca.h>
+#include <math.h>
+
+static uns opt_default_value_flags[] = {
+ [OPT_CL_BOOL] = OPT_NO_VALUE,
+ [OPT_CL_STATIC] = OPT_MAYBE_VALUE,
+ [OPT_CL_SWITCH] = OPT_NO_VALUE,
+ [OPT_CL_INC] = OPT_NO_VALUE,
+ [OPT_CL_CALL] = 0,
+ [OPT_CL_USER] = 0,
+ [OPT_CL_SECTION] = 0,
+ [OPT_CL_HELP] = 0
+};
-static void opt_failure(const char * mesg, ...) FORMAT_CHECK(printf,1,2);
-static void opt_failure(const char * mesg, ...) {
+void opt_failure(const char * mesg, ...) {
va_list args;
va_start(args, mesg);
- stk_vprintf(mesg, args);
+ vfprintf(stderr, mesg, args);
+ fprintf(stderr, "\nRun with --help for more information.\n");
exit(OPT_EXIT_BAD_ARGS);
- va_end(args);
}
-struct opt_section * opt_section_root;
-
-void opt_help_noexit_internal(struct opt_section * help) {
- uns first_column = 0;
-
- for (struct opt_item * item = help->opt; item->cls != OPT_CL_END; item++) {
- if (item->flags & OPT_NO_HELP) continue;
- if (item->cls == OPT_CL_HELP && item->u.help2 == NULL) continue;
- if (item->cls == OPT_CL_SECTION) continue;
-
- uns linelen = 0;
- if (item->cls == OPT_CL_HELP) { // two-column help line
- if (first_column < strlen(item->help))
- first_column = strlen(item->help);
- continue;
- }
-
- if (item->letter) { // will write sth like "-x, --exclusive"
- linelen = strlen("-x, --") + strlen(item->name);
- } else { // will write sth like "--exclusive"
- linelen = strlen("--") + strlen(item->name);
- }
+static char *opt_name(struct opt_context *oc, struct opt_precomputed *opt)
+{
+ struct opt_item *item = opt->item;
+ char *res;
+ if (item->letter >= OPT_POSITIONAL_TAIL)
+ res = stk_printf("positional argument #%d", oc->positional_count);
+ else if (opt->flags & OPT_SEEN_AS_LONG)
+ res = stk_printf("--%s", opt->name);
+ else
+ res = stk_printf("-%c", item->letter);
+ return xstrdup(res);
+}
- ASSERT(item->flags & OPT_VALUE_FLAGS);
+#define THIS_OPT opt_name(oc, opt)
- if (item->flags & OPT_REQUIRED_VALUE) {
- linelen += strlen("=value");
- } else if (item->flags & OPT_MAYBE_VALUE) {
- linelen += strlen("(=value)");
- }
-
- if (linelen > first_column)
- first_column = linelen;
+void opt_precompute(struct opt_precomputed *opt, struct opt_item *item)
+{
+ opt->item = item;
+ opt->count = 0;
+ opt->name = item->name;
+ uns flags = item->flags;
+
+ if (item->letter >= OPT_POSITIONAL_TAIL) {
+ flags &= ~OPT_VALUE_FLAGS;
+ flags |= OPT_REQUIRED_VALUE;
}
-
- char * spaces = alloca(first_column + 1);
- char * buf = alloca(first_column + 1);
- for (uns i=0;i<first_column;i++)
- spaces[i] = ' ';
-
- spaces[first_column] = 0;
-
-#define VAL(it) ((it->flags & OPT_REQUIRED_VALUE) ? "=value" : ((it->flags & OPT_NO_VALUE) ? "" : "(=value)"))
- for (struct opt_item * item = help->opt; item->cls != OPT_CL_END; item++) {
- if (item->flags & OPT_NO_HELP) continue;
-
- if (item->cls == OPT_CL_HELP) {
- fprintf(stderr, "%s", item->help);
- if (item->u.help2 == NULL)
- fprintf(stderr, "\n");
- else
- fprintf(stderr, "%s %s\n", spaces + strlen(item->help), item->u.help2);
- } else if (item->cls == OPT_CL_SECTION) {
- opt_help_noexit_internal(item->u.section);
- } else if (item->letter) {
- sprintf(buf, "-%c, --%s%s", item->letter, item->name, VAL(item));
- fprintf(stderr, "%s%s %s\n", buf, spaces + strlen(buf), item->help);
- } else {
- sprintf(buf, "--%s%s", item->name, VAL(item));
- fprintf(stderr, "%s%s %s\n", buf, spaces + strlen(buf), item->help);
- }
+ if (!(flags & OPT_VALUE_FLAGS)) {
+ ASSERT(item->cls != OPT_CL_CALL && item->cls != OPT_CL_USER);
+ flags |= opt_default_value_flags[item->cls];
}
+
+ opt->flags = flags;
}
-void opt_init(struct opt_section * options) {
- for (struct opt_item * item = options->opt; item->cls != OPT_CL_END; item++) {
- if (item->cls == OPT_CL_SECTION)
- opt_init(item->u.section);
- else if (!(item->flags & OPT_VALUE_FLAGS)) {
- if (item->cls == OPT_CL_CALL || item->cls == OPT_CL_USER) {
- fprintf(stderr, "You MUST specify some of the value flags for the %c/%s item.\n", item->letter, item->name);
- ASSERT(0);
- } else
- item->flags |= opt_default_value_flags[item->cls];
+static void opt_invoke_hooks(struct opt_context *oc, uns event, struct opt_item *item, char *value)
+{
+ for (int i = 0; i < oc->hook_count; i++) {
+ struct opt_item *hook = oc->hooks[i];
+ if (hook->flags & event) {
+ void *data = (hook->flags & OPT_HOOK_INTERNAL) ? oc : hook->ptr;
+ hook->u.hook(item, event, value, data);
}
}
- opt_section_root = options;
}
-static struct opt_item * opt_find_item_longopt_section(char * str, struct opt_section * options) {
+static struct opt_precomputed * opt_find_item_longopt(struct opt_context * oc, char * str) {
uns len = strlen(str);
- struct opt_item * candidate = NULL;
-
- for (struct opt_item * item = options->opt; item->cls != OPT_CL_END; item++) {
- if (item->cls == OPT_CL_SECTION) {
- struct opt_item * out = opt_find_item_longopt_section(str, item->u.section);
- if (out) {
- if (candidate)
- opt_failure("Ambiguous prefix %s: Found matching %s and %s.\n", str, candidate->name, item->name);
- else
- candidate = out;
- }
- } else if (!strncmp(item->name, str, len)) {
- if (strlen(item->name) == len)
- return item;
+ struct opt_precomputed * candidate = NULL;
- if (candidate)
- opt_failure("Ambiguous prefix %s: Found matching %s and %s.\n", str, candidate->name, item->name);
- else
- candidate = item;
- }
+ for (int i = 0; i < oc->opt_count; i++) {
+ struct opt_precomputed *opt = &oc->opts[i];
+ if (!opt->name)
+ continue;
+
+ if (!strncmp(opt->name, str, len)) {
+ if (strlen(opt->name) == len)
+ return opt;
+ } else if (opt->item->cls == OPT_CL_BOOL && !strncmp("no-", str, 3) && !strncmp(opt->name, str+3, len-3)) {
+ if (strlen(opt->name) == len-3)
+ return opt;
+ } else
+ continue;
+
+ if (candidate)
+ opt_failure("Ambiguous option --%s: matches both --%s and --%s.", str, candidate->name, opt->name);
+ else
+ candidate = opt;
}
if (candidate)
return candidate;
- else {
- }
-}
-static struct opt_item * opt_find_item_longopt(char * str) {
- struct opt_item * out = opt_find_item_longopt_section(str, opt_section_root);
- if (out == NULL)
- opt_failure("Invalid argument: %s\n", str);
- return out;
+ opt_failure("Invalid option --%s.", str);
}
-#define OPT_NAME (longopt ? stk_printf("--%s", item->name) : stk_printf("-%c", item->letter))
-static void opt_parse_value(struct opt_item * item, char * value, int longopt) {
+// FIXME: Use simple-lists?
+#define OPT_PTR(type) ({ \
+ type * ptr; \
+ if (item->flags & OPT_MULTIPLE) { \
+ struct { \
+ cnode n; \
+ type v; \
+ } * n = xmalloc(sizeof(*n)); \
+ clist_add_tail(item->ptr, &(n->n)); \
+ ptr = &(n->v); \
+ } else \
+ ptr = item->ptr; \
+ ptr; })
+
+static void opt_parse_value(struct opt_context * oc, struct opt_precomputed * opt, char * value) {
+ struct opt_item * item = opt->item;
+
+ if (opt->count++ && (opt->flags & OPT_SINGLE))
+ opt_failure("Option %s must be specified at most once.", THIS_OPT);
+
+ if (opt->flags & OPT_LAST_ARG)
+ oc->stop_parsing = 1;
+
+ opt_invoke_hooks(oc, OPT_HOOK_BEFORE_VALUE, item, value);
+
switch (item->cls) {
case OPT_CL_BOOL:
- if (!strcasecmp(value, "y") || !strcasecmp(value, "yes") || !strcasecmp(value, "true"))
- *((int *) item->ptr) = 1;
- else if (!strcasecmp(value, "n") || !strcasecmp(value, "no") || !strcasecmp(value, "false"))
- *((int *) item->ptr) = 0;
+ if (!value || !strcasecmp(value, "y") || !strcasecmp(value, "yes") || !strcasecmp(value, "true") || !strcasecmp(value, "1"))
+ *((int *) item->ptr) = 1 ^ (!!(opt->flags & OPT_NEGATIVE));
+ else if (!strcasecmp(value, "n") || !strcasecmp(value, "no") || !strcasecmp(value, "false") || !strcasecmp(value, "0"))
+ *((int *) item->ptr) = 0 ^ (!!(opt->flags & OPT_NEGATIVE));
else
- opt_failure("Boolean argument for %s has a strange value. Supported (case insensitive): y/n, yes/no, true/false.\n", OPT_NAME);
+ opt_failure("Boolean argument for %s has a strange value. Supported (case insensitive): 1/0, y/n, yes/no, true/false.", THIS_OPT);
break;
case OPT_CL_STATIC:
{
char * e = NULL;
switch (item->type) {
case CT_INT:
- e = cf_parse_int(value, item->ptr);
+ if (!value)
+ *OPT_PTR(int) = 0;
+ else
+ e = cf_parse_int(value, OPT_PTR(int));
if (e)
- opt_failure("Integer value parsing failed for argument %s: %s\n", OPT_NAME, e);
+ opt_failure("Integer value parsing failed for %s: %s", THIS_OPT, e);
break;
case CT_U64:
- e = cf_parse_u64(value, item->ptr);
+ if (!value)
+ *OPT_PTR(u64) = 0;
+ else
+ e = cf_parse_u64(value, OPT_PTR(u64));
if (e)
- opt_failure("Unsigned 64-bit value parsing failed for argument %s: %s\n", OPT_NAME, e);
+ opt_failure("Unsigned 64-bit value parsing failed for %s: %s", THIS_OPT, e);
break;
case CT_DOUBLE:
- e = cf_parse_double(value, item->ptr);
+ if (!value)
+ *OPT_PTR(double) = NAN;
+ else
+ e = cf_parse_double(value, OPT_PTR(double));
if (e)
- opt_failure("Double value parsing failed for argument %s: %s\n", OPT_NAME, e);
+ opt_failure("Floating-point value parsing failed for %s: %s", THIS_OPT, e);
break;
case CT_IP:
- e = cf_parse_ip(value, item->ptr);
+ if (!value)
+ *OPT_PTR(u32) = 0;
+ else
+ e = cf_parse_ip(value, OPT_PTR(u32));
if (e)
- opt_failure("IP parsing failed for argument %s: %s\n", OPT_NAME, e);
+ opt_failure("IP address parsing failed for %s: %s", THIS_OPT, e);
break;
case CT_STRING:
- item->ptr = strdup(value);
+ if (!value)
+ *OPT_PTR(const char *) = NULL;
+ else
+ *OPT_PTR(const char *) = xstrdup(value);
break;
default:
ASSERT(0);
break;
}
case OPT_CL_SWITCH:
- if (*((int *)item->ptr) != -1)
- opt_failure("Multiple switches: %s", OPT_NAME);
+ if ((opt->flags & OPT_SINGLE) && *((int *)item->ptr) != -1)
+ opt_failure("Multiple switches: %s", THIS_OPT);
else
*((int *)item->ptr) = item->u.value;
break;
case OPT_CL_INC:
- if (item->flags | OPT_DECREMENT)
+ if (opt->flags & OPT_NEGATIVE)
(*((int *)item->ptr))--;
else
(*((int *)item->ptr))++;
+ break;
case OPT_CL_CALL:
-
+ {
+ void *data = (opt->flags & OPT_INTERNAL) ? oc : item->ptr;
+ item->u.call(item, value, data);
+ break;
+ }
case OPT_CL_USER:
{
char * e = NULL;
- e = item->u.utype->parser(value, item->ptr);
+ e = item->u.utype->parser(value, OPT_PTR(void*));
if (e)
- opt_failure("User defined type value parsing failed for argument %s: %s\n", OPT_NAME, e);
+ opt_failure("Cannot parse the value of %s: %s", THIS_OPT, e);
break;
}
+ default:
+ ASSERT(0);
}
+
+ opt_invoke_hooks(oc, OPT_HOOK_AFTER_VALUE, item, value);
}
-#undef OPT_NAME
-static int opt_longopt(char ** argv, int index) {
- int eaten;
+static int opt_longopt(struct opt_context * oc, char ** argv, int index) {
+ int eaten = 0;
char * name_in = argv[index] + 2; // skipping the -- on the beginning
uns pos = strchrnul(name_in, '=') - name_in;
- struct opt_item * item = opt_find_item_longopt(strndupa(name_in, pos));
+ struct opt_precomputed * opt = opt_find_item_longopt(oc, strndupa(name_in, pos));
char * value = NULL;
- if (item->flags | OPT_REQUIRED_VALUE) {
- if (pos < strlen(name_in))
+
+ opt->flags |= OPT_SEEN_AS_LONG;
+
+ if (opt->item->cls == OPT_CL_BOOL && !strncmp(name_in, "no-", 3) && !strncmp(name_in+3, opt->item->name, pos-3)) {
+ if (name_in[pos])
+ opt_failure("Option --%s must not have any value.", name_in);
+ value = "n";
+ } else if (opt->flags & OPT_REQUIRED_VALUE) {
+ if (name_in[pos])
value = name_in + pos + 1;
else {
value = argv[index+1];
+ if (!value)
+ opt_failure("Option %s must have a value, but nothing supplied.", THIS_OPT);
eaten++;
}
- }
- else if (item->flags | OPT_MAYBE_VALUE) {
- if (pos < strlen(name_in))
+ } else if (opt->flags & OPT_MAYBE_VALUE) {
+ if (name_in[pos])
value = name_in + pos + 1;
+ } else {
+ if (name_in[pos])
+ opt_failure("Option %s must have no value.", THIS_OPT);
}
- else {
- if (pos < strlen(name_in))
- opt_failure("Argument %s must not have any value.", item->name);
- }
+ opt_parse_value(oc, opt, value);
+ return eaten;
}
-void opt_parse(char ** argv, opt_positional * callback) {
-
- int force_positional = 0;
- for (int i=0;argv[i];i++) {
- if (argv[i][0] != '-' || force_positional) {
- callback(argv[i]);
- } else {
- if (argv[i][1] == '-') {
- if (argv[i][2] == '\0')
- force_positional++;
- else
- i += opt_longopt(argv, i);
+static int opt_shortopt(struct opt_context * oc, char ** argv, int index) {
+ int chr = 0;
+ struct opt_precomputed * opt;
+ int o;
+
+ while (o = argv[index][++chr]) {
+ if (o < 0 || o >= 128)
+ opt_failure("Invalid character 0x%02x in option name. Only ASCII is allowed.", o & 0xff);
+ opt = oc->shortopt[o];
+
+ if (!opt)
+ opt_failure("Unknown option -%c.", o);
+
+ opt->flags &= ~OPT_SEEN_AS_LONG;
+
+ if (opt->flags & OPT_NO_VALUE)
+ opt_parse_value(oc, opt, NULL);
+ else if (opt->flags & OPT_REQUIRED_VALUE) {
+ if (argv[index][chr+1]) {
+ opt_parse_value(oc, opt, argv[index] + chr + 1);
+ return 0;
+ } else if (!argv[index+1])
+ opt_failure("Option -%c must have a value, but nothing supplied.", o);
+ else {
+ opt_parse_value(oc, opt, argv[index+1]);
+ return 1;
}
- else if (argv[i][1])
- i += opt_shortopt(argv, i);
- else
- callback(argv[i]);
+ } else if (opt->flags & OPT_MAYBE_VALUE) {
+ if (argv[index][chr+1]) {
+ opt_parse_value(oc, opt, argv[index] + chr + 1);
+ return 0;
+ } else
+ opt_parse_value(oc, opt, NULL);
+ } else {
+ ASSERT(0);
}
}
-}
-#ifdef TEST
-#include <ucw/fastbuf.h>
-
-static int show_version(const char ** param UNUSED) {
- printf("This is a simple tea boiling console v0.1.\n");
- exit(EXIT_SUCCESS);
+ return 0;
}
-struct teapot_temperature {
- enum {
- TEMP_CELSIUS = 0,
- TEMP_FAHRENHEIT,
- TEMP_KELVIN,
- TEMP_REAUMUR,
- TEMP_RANKINE
- } scale;
- int value;
-} temperature;
-
-static char * temp_scale_str[] = { "C", "F", "K", "Re", "R" };
-
-static enum TEAPOT_TYPE {
- TEAPOT_STANDARD = 0,
- TEAPOT_EXCLUSIVE,
- TEAPOT_GLASS,
- TEAPOT_HANDS,
- TEAPOT_UNDEFINED = -1
-} set = TEAPOT_UNDEFINED;
-
-static int english = 0;
-static char * name = NULL;
-static int sugar = 0;
-static int verbose = 1;
-static int with_gas = 0;
-static int black_magic = 0;
-static int pray = 0;
-static int water_amount = 0;
-
-static const char * teapot_temperature_parser(char * in, void * ptr) {
- struct teapot_temperature * temp = ptr;
- const char * next;
- const char * err = str_to_int(&temp->value, in, &next, 0);
- if (err)
- return err;
- if (!strcmp("C", next))
- temp->scale = TEMP_CELSIUS;
- else if (!strcmp("F", next))
- temp->scale = TEMP_FAHRENHEIT;
- else if (!strcmp("K", next))
- temp->scale = TEMP_KELVIN;
- else if (!strcmp("R", next))
- temp->scale = TEMP_RANKINE;
- else if (!strcmp("Re", next))
- temp->scale = TEMP_REAUMUR;
+static void opt_positional(struct opt_context * oc, char * value) {
+ oc->positional_count++;
+ uns id = oc->positional_count > oc->positional_max ? OPT_POSITIONAL_TAIL : OPT_POSITIONAL(oc->positional_count);
+ struct opt_precomputed * opt = oc->shortopt[id];
+ if (!opt)
+ opt_failure("Too many positional arguments.");
else {
- fprintf(stderr, "Unknown scale: %s\n", next);
- exit(OPT_EXIT_BAD_ARGS);
+ opt->flags &= OPT_SEEN_AS_LONG;
+ opt_parse_value(oc, opt, value);
}
- return next + strlen(next);
}
-static void teapot_temperature_dumper(struct fastbuf * fb, void * ptr) {
- struct teapot_temperature * temp = ptr;
- bprintf(fb, "%d%s", temp->value, temp_scale_str[temp->scale]);
+static void opt_count_items(struct opt_context *oc, const struct opt_section *sec)
+{
+ for (const struct opt_item *item = sec->opt; item->cls != OPT_CL_END; item++) {
+ if (item->cls == OPT_CL_SECTION)
+ opt_count_items(oc, item->u.section);
+ else if (item->cls == OPT_CL_HOOK)
+ oc->hook_count++;
+ else if (item->letter || item->name) {
+ oc->opt_count++;
+ if (item->letter > OPT_POSITIONAL_TAIL)
+ oc->positional_max++;
+ }
+ }
}
-static struct cf_user_type teapot_temperature_t = {
- .size = sizeof(struct teapot_temperature),
- .name = "teapot_temperature_t",
- .parser = (cf_parser1*) teapot_temperature_parser,
- .dumper = (cf_dumper1*) teapot_temperature_dumper
-};
-
-static struct opt_section water_options = {
- OPT_ITEMS {
- OPT_INT('w', "water", water_amount, OPT_REQUIRED | OPT_REQUIRED_VALUE, "Amount of water (in mls)"),
- OPT_BOOL('G', "with-gas", with_gas, OPT_NO_VALUE, "Use water with gas"),
- OPT_END
+static void opt_prepare_items(struct opt_context *oc, const struct opt_section *sec)
+{
+ for (struct opt_item *item = sec->opt; item->cls != OPT_CL_END; item++) {
+ if (item->cls == OPT_CL_SECTION)
+ opt_prepare_items(oc, item->u.section);
+ else if (item->cls == OPT_CL_HOOK)
+ oc->hooks[oc->hook_count++] = item;
+ else if (item->letter || item->name) {
+ struct opt_precomputed * opt = &oc->opts[oc->opt_count++];
+ opt_precompute(opt, item);
+ if (item->letter)
+ oc->shortopt[(int) item->letter] = opt;
+ }
}
-};
+}
-static struct opt_section help = {
- OPT_ITEMS {
- OPT_HELP("A simple tea boiling console."),
- OPT_HELP("Usage: teapot [options] name-of-the-tea"),
- OPT_HELP("Black, green or white tea supported as well as fruit or herbal tea."),
- OPT_HELP("You may specify more kinds of tea, all of them will be boiled for you, in the given order."),
- OPT_HELP(""),
- OPT_HELP("Options:"),
- OPT_HELP_OPTION,
- OPT_CALL('V', "version", show_version, OPT_NO_VALUE, "Show the version"),
- OPT_HELP(""),
- OPT_BOOL('e', "english-style", english, 0, "English style (with milk)"),
- OPT_INT('s', "sugar", sugar, OPT_REQUIRED_VALUE, "Amount of sugar (in teaspoons)"),
- OPT_SWITCH(0, "standard-set", set, TEAPOT_STANDARD, 0, "Standard teapot"),
- OPT_SWITCH('x', "exclusive-set", set, TEAPOT_EXCLUSIVE, 0, "Exclusive teapot"),
- OPT_SWITCH('g', "glass-set", set, TEAPOT_GLASS, 0, "Transparent glass teapot"),
- OPT_SWITCH('h', "hands", set, TEAPOT_HANDS, 0, "Use user's hands as a teapot (a bit dangerous)"),
- OPT_USER('t', "temperature", temperature, teapot_temperature_t, OPT_REQUIRED_VALUE,
- "Wanted final temperature of the tea to be served\n"
- "\t\tSupported scales: \tCelsius [60C], Fahrenheit [140F],"
- "\t\t\tKelvin [350K], Rankine [600R] and Reaumur [50Re]"
- "\t\tOnly integer values allowed."),
- OPT_INC('v', "verbose", verbose, 0, "Verbose (the more -v, the more verbose)"),
- OPT_INC('q', "quiet", verbose, OPT_DECREMENT, "Quiet (the more -q, the more quiet)"),
- OPT_INT('b', "black-magic", black_magic, 0, "Use black magic to make the tea extraordinary delicious"),
- OPT_BOOL('p', "pray", pray, 0, "Pray before boiling"),
- OPT_HELP(""),
- OPT_HELP("Water options:"),
- OPT_SECTION(water_options),
- OPT_END
+static void opt_check_required(struct opt_context *oc)
+{
+ for (int i = 0; i < oc->opt_count; i++) {
+ struct opt_precomputed *opt = &oc->opts[i];
+ if (!opt->count && (opt->flags & OPT_REQUIRED)) {
+ struct opt_item *item = opt->item;
+ if (item->letter > OPT_POSITIONAL_TAIL)
+ opt_failure("Required positional argument #%d not found.", item->letter - OPT_POSITIONAL_TAIL);
+ else if (item->letter == OPT_POSITIONAL_TAIL)
+ opt_failure("Required positional argument not found.");
+ else if (item->letter && item->name)
+ opt_failure("Required option -%c/--%s not found.", item->letter, item->name);
+ else if (item->letter)
+ opt_failure("Required option -%c not found.", item->letter);
+ else
+ opt_failure("Required option --%s not found.", item->name);
+ }
}
-};
-
-static void boil_tea(const char * name) {
- printf("Boiling a tea: %s\n", name);
}
-int main(int argc, char ** argv)
-{
- char ** teas;
- int teas_num;
+int opt_parse(const struct opt_section * options, char ** argv) {
+ struct opt_context * oc = alloca(sizeof(*oc));
+ memset(oc, 0, sizeof (*oc));
+ oc->options = options;
- opt_init(&help);
- opt_parse(argv, NULL);
+ opt_count_items(oc, options);
+ oc->opts = alloca(sizeof(*oc->opts) * oc->opt_count);
+ oc->shortopt = alloca(sizeof(*oc->shortopt) * (oc->positional_max + 257));
+ memset(oc->shortopt, 0, sizeof(*oc->shortopt) * (oc->positional_max + 257));
+ oc->hooks = alloca(sizeof (*oc->hooks) * oc->hook_count);
- for (int i=0; i<teas_num; i++)
- boil_tea(teas[i]);
+ oc->opt_count = 0;
+ oc->hook_count = 0;
+ opt_prepare_items(oc, options);
- printf("Everything OK. Bye.\n");
-}
+ int force_positional = 0;
+ int i;
+ for (i=0; argv[i] && !oc->stop_parsing; i++) {
+ char *arg = argv[i];
+ opt_invoke_hooks(oc, OPT_HOOK_BEFORE_ARG, NULL, NULL);
+ if (arg[0] != '-' || force_positional)
+ opt_positional(oc, arg);
+ else {
+ if (arg[1] == '-') {
+ if (arg[2] == '\0')
+ force_positional++;
+ else
+ i += opt_longopt(oc, argv, i);
+ } else if (arg[1])
+ i += opt_shortopt(oc, argv, i);
+ else
+ opt_positional(oc, arg);
+ }
+ }
-#endif
+ opt_check_required(oc);
+ opt_invoke_hooks(oc, OPT_HOOK_FINAL, NULL, NULL);
+ return i;
+}
projects / libucw.git / blobdiff