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-rw-r--r--tools/lib/subcmd/parse-options.c1039
1 files changed, 1039 insertions, 0 deletions
diff --git a/tools/lib/subcmd/parse-options.c b/tools/lib/subcmd/parse-options.c
new file mode 100644
index 000000000..9fa75943f
--- /dev/null
+++ b/tools/lib/subcmd/parse-options.c
@@ -0,0 +1,1039 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <ctype.h>
+#include "subcmd-util.h"
+#include "parse-options.h"
+#include "subcmd-config.h"
+#include "pager.h"
+
+#define OPT_SHORT 1
+#define OPT_UNSET 2
+
+char *error_buf;
+
+static int opterror(const struct option *opt, const char *reason, int flags)
+{
+ if (flags & OPT_SHORT)
+ fprintf(stderr, " Error: switch `%c' %s", opt->short_name, reason);
+ else if (flags & OPT_UNSET)
+ fprintf(stderr, " Error: option `no-%s' %s", opt->long_name, reason);
+ else
+ fprintf(stderr, " Error: option `%s' %s", opt->long_name, reason);
+
+ return -1;
+}
+
+static const char *skip_prefix(const char *str, const char *prefix)
+{
+ size_t len = strlen(prefix);
+ return strncmp(str, prefix, len) ? NULL : str + len;
+}
+
+static void optwarning(const struct option *opt, const char *reason, int flags)
+{
+ if (flags & OPT_SHORT)
+ fprintf(stderr, " Warning: switch `%c' %s", opt->short_name, reason);
+ else if (flags & OPT_UNSET)
+ fprintf(stderr, " Warning: option `no-%s' %s", opt->long_name, reason);
+ else
+ fprintf(stderr, " Warning: option `%s' %s", opt->long_name, reason);
+}
+
+static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
+ int flags, const char **arg)
+{
+ const char *res;
+
+ if (p->opt) {
+ res = p->opt;
+ p->opt = NULL;
+ } else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 ||
+ **(p->argv + 1) == '-')) {
+ res = (const char *)opt->defval;
+ } else if (p->argc > 1) {
+ p->argc--;
+ res = *++p->argv;
+ } else
+ return opterror(opt, "requires a value", flags);
+ if (arg)
+ *arg = res;
+ return 0;
+}
+
+static int get_value(struct parse_opt_ctx_t *p,
+ const struct option *opt, int flags)
+{
+ const char *s, *arg = NULL;
+ const int unset = flags & OPT_UNSET;
+ int err;
+
+ if (unset && p->opt)
+ return opterror(opt, "takes no value", flags);
+ if (unset && (opt->flags & PARSE_OPT_NONEG))
+ return opterror(opt, "isn't available", flags);
+ if (opt->flags & PARSE_OPT_DISABLED)
+ return opterror(opt, "is not usable", flags);
+
+ if (opt->flags & PARSE_OPT_EXCLUSIVE) {
+ if (p->excl_opt && p->excl_opt != opt) {
+ char msg[128];
+
+ if (((flags & OPT_SHORT) && p->excl_opt->short_name) ||
+ p->excl_opt->long_name == NULL) {
+ snprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
+ p->excl_opt->short_name);
+ } else {
+ snprintf(msg, sizeof(msg), "cannot be used with %s",
+ p->excl_opt->long_name);
+ }
+ opterror(opt, msg, flags);
+ return -3;
+ }
+ p->excl_opt = opt;
+ }
+ if (!(flags & OPT_SHORT) && p->opt) {
+ switch (opt->type) {
+ case OPTION_CALLBACK:
+ if (!(opt->flags & PARSE_OPT_NOARG))
+ break;
+ /* FALLTHROUGH */
+ case OPTION_BOOLEAN:
+ case OPTION_INCR:
+ case OPTION_BIT:
+ case OPTION_SET_UINT:
+ case OPTION_SET_PTR:
+ return opterror(opt, "takes no value", flags);
+ case OPTION_END:
+ case OPTION_ARGUMENT:
+ case OPTION_GROUP:
+ case OPTION_STRING:
+ case OPTION_INTEGER:
+ case OPTION_UINTEGER:
+ case OPTION_LONG:
+ case OPTION_ULONG:
+ case OPTION_U64:
+ default:
+ break;
+ }
+ }
+
+ if (opt->flags & PARSE_OPT_NOBUILD) {
+ char reason[128];
+ bool noarg = false;
+
+ err = snprintf(reason, sizeof(reason),
+ opt->flags & PARSE_OPT_CANSKIP ?
+ "is being ignored because %s " :
+ "is not available because %s",
+ opt->build_opt);
+ reason[sizeof(reason) - 1] = '\0';
+
+ if (err < 0)
+ strncpy(reason, opt->flags & PARSE_OPT_CANSKIP ?
+ "is being ignored" :
+ "is not available",
+ sizeof(reason));
+
+ if (!(opt->flags & PARSE_OPT_CANSKIP))
+ return opterror(opt, reason, flags);
+
+ err = 0;
+ if (unset)
+ noarg = true;
+ if (opt->flags & PARSE_OPT_NOARG)
+ noarg = true;
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
+ noarg = true;
+
+ switch (opt->type) {
+ case OPTION_BOOLEAN:
+ case OPTION_INCR:
+ case OPTION_BIT:
+ case OPTION_SET_UINT:
+ case OPTION_SET_PTR:
+ case OPTION_END:
+ case OPTION_ARGUMENT:
+ case OPTION_GROUP:
+ noarg = true;
+ break;
+ case OPTION_CALLBACK:
+ case OPTION_STRING:
+ case OPTION_INTEGER:
+ case OPTION_UINTEGER:
+ case OPTION_LONG:
+ case OPTION_ULONG:
+ case OPTION_U64:
+ default:
+ break;
+ }
+
+ if (!noarg)
+ err = get_arg(p, opt, flags, NULL);
+ if (err)
+ return err;
+
+ optwarning(opt, reason, flags);
+ return 0;
+ }
+
+ switch (opt->type) {
+ case OPTION_BIT:
+ if (unset)
+ *(int *)opt->value &= ~opt->defval;
+ else
+ *(int *)opt->value |= opt->defval;
+ return 0;
+
+ case OPTION_BOOLEAN:
+ *(bool *)opt->value = unset ? false : true;
+ if (opt->set)
+ *(bool *)opt->set = true;
+ return 0;
+
+ case OPTION_INCR:
+ *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
+ return 0;
+
+ case OPTION_SET_UINT:
+ *(unsigned int *)opt->value = unset ? 0 : opt->defval;
+ return 0;
+
+ case OPTION_SET_PTR:
+ *(void **)opt->value = unset ? NULL : (void *)opt->defval;
+ return 0;
+
+ case OPTION_STRING:
+ err = 0;
+ if (unset)
+ *(const char **)opt->value = NULL;
+ else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
+ *(const char **)opt->value = (const char *)opt->defval;
+ else
+ err = get_arg(p, opt, flags, (const char **)opt->value);
+
+ if (opt->set)
+ *(bool *)opt->set = true;
+
+ /* PARSE_OPT_NOEMPTY: Allow NULL but disallow empty string. */
+ if (opt->flags & PARSE_OPT_NOEMPTY) {
+ const char *val = *(const char **)opt->value;
+
+ if (!val)
+ return err;
+
+ /* Similar to unset if we are given an empty string. */
+ if (val[0] == '\0') {
+ *(const char **)opt->value = NULL;
+ return 0;
+ }
+ }
+
+ return err;
+
+ case OPTION_CALLBACK:
+ if (opt->set)
+ *(bool *)opt->set = true;
+
+ if (unset)
+ return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
+ if (opt->flags & PARSE_OPT_NOARG)
+ return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
+ return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
+
+ case OPTION_INTEGER:
+ if (unset) {
+ *(int *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(int *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ *(int *)opt->value = strtol(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ case OPTION_UINTEGER:
+ if (unset) {
+ *(unsigned int *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(unsigned int *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ if (arg[0] == '-')
+ return opterror(opt, "expects an unsigned numerical value", flags);
+ *(unsigned int *)opt->value = strtol(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ case OPTION_LONG:
+ if (unset) {
+ *(long *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(long *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ *(long *)opt->value = strtol(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ case OPTION_ULONG:
+ if (unset) {
+ *(unsigned long *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(unsigned long *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ *(unsigned long *)opt->value = strtoul(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ case OPTION_U64:
+ if (unset) {
+ *(u64 *)opt->value = 0;
+ return 0;
+ }
+ if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ *(u64 *)opt->value = opt->defval;
+ return 0;
+ }
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ if (arg[0] == '-')
+ return opterror(opt, "expects an unsigned numerical value", flags);
+ *(u64 *)opt->value = strtoull(arg, (char **)&s, 10);
+ if (*s)
+ return opterror(opt, "expects a numerical value", flags);
+ return 0;
+
+ case OPTION_END:
+ case OPTION_ARGUMENT:
+ case OPTION_GROUP:
+ default:
+ die("should not happen, someone must be hit on the forehead");
+ }
+}
+
+static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
+{
+retry:
+ for (; options->type != OPTION_END; options++) {
+ if (options->short_name == *p->opt) {
+ p->opt = p->opt[1] ? p->opt + 1 : NULL;
+ return get_value(p, options, OPT_SHORT);
+ }
+ }
+
+ if (options->parent) {
+ options = options->parent;
+ goto retry;
+ }
+
+ return -2;
+}
+
+static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
+ const struct option *options)
+{
+ const char *arg_end = strchr(arg, '=');
+ const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
+ int abbrev_flags = 0, ambiguous_flags = 0;
+
+ if (!arg_end)
+ arg_end = arg + strlen(arg);
+
+retry:
+ for (; options->type != OPTION_END; options++) {
+ const char *rest;
+ int flags = 0;
+
+ if (!options->long_name)
+ continue;
+
+ rest = skip_prefix(arg, options->long_name);
+ if (options->type == OPTION_ARGUMENT) {
+ if (!rest)
+ continue;
+ if (*rest == '=')
+ return opterror(options, "takes no value", flags);
+ if (*rest)
+ continue;
+ p->out[p->cpidx++] = arg - 2;
+ return 0;
+ }
+ if (!rest) {
+ if (strstarts(options->long_name, "no-")) {
+ /*
+ * The long name itself starts with "no-", so
+ * accept the option without "no-" so that users
+ * do not have to enter "no-no-" to get the
+ * negation.
+ */
+ rest = skip_prefix(arg, options->long_name + 3);
+ if (rest) {
+ flags |= OPT_UNSET;
+ goto match;
+ }
+ /* Abbreviated case */
+ if (strstarts(options->long_name + 3, arg)) {
+ flags |= OPT_UNSET;
+ goto is_abbreviated;
+ }
+ }
+ /* abbreviated? */
+ if (!strncmp(options->long_name, arg, arg_end - arg)) {
+is_abbreviated:
+ if (abbrev_option) {
+ /*
+ * If this is abbreviated, it is
+ * ambiguous. So when there is no
+ * exact match later, we need to
+ * error out.
+ */
+ ambiguous_option = abbrev_option;
+ ambiguous_flags = abbrev_flags;
+ }
+ if (!(flags & OPT_UNSET) && *arg_end)
+ p->opt = arg_end + 1;
+ abbrev_option = options;
+ abbrev_flags = flags;
+ continue;
+ }
+ /* negated and abbreviated very much? */
+ if (strstarts("no-", arg)) {
+ flags |= OPT_UNSET;
+ goto is_abbreviated;
+ }
+ /* negated? */
+ if (strncmp(arg, "no-", 3))
+ continue;
+ flags |= OPT_UNSET;
+ rest = skip_prefix(arg + 3, options->long_name);
+ /* abbreviated and negated? */
+ if (!rest && strstarts(options->long_name, arg + 3))
+ goto is_abbreviated;
+ if (!rest)
+ continue;
+ }
+match:
+ if (*rest) {
+ if (*rest != '=')
+ continue;
+ p->opt = rest + 1;
+ }
+ return get_value(p, options, flags);
+ }
+
+ if (ambiguous_option) {
+ fprintf(stderr,
+ " Error: Ambiguous option: %s (could be --%s%s or --%s%s)\n",
+ arg,
+ (ambiguous_flags & OPT_UNSET) ? "no-" : "",
+ ambiguous_option->long_name,
+ (abbrev_flags & OPT_UNSET) ? "no-" : "",
+ abbrev_option->long_name);
+ return -1;
+ }
+ if (abbrev_option)
+ return get_value(p, abbrev_option, abbrev_flags);
+
+ if (options->parent) {
+ options = options->parent;
+ goto retry;
+ }
+
+ return -2;
+}
+
+static void check_typos(const char *arg, const struct option *options)
+{
+ if (strlen(arg) < 3)
+ return;
+
+ if (strstarts(arg, "no-")) {
+ fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)\n", arg);
+ exit(129);
+ }
+
+ for (; options->type != OPTION_END; options++) {
+ if (!options->long_name)
+ continue;
+ if (strstarts(options->long_name, arg)) {
+ fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)\n", arg);
+ exit(129);
+ }
+ }
+}
+
+static void parse_options_start(struct parse_opt_ctx_t *ctx,
+ int argc, const char **argv, int flags)
+{
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->argc = argc - 1;
+ ctx->argv = argv + 1;
+ ctx->out = argv;
+ ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
+ ctx->flags = flags;
+ if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
+ (flags & PARSE_OPT_STOP_AT_NON_OPTION))
+ die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
+}
+
+static int usage_with_options_internal(const char * const *,
+ const struct option *, int,
+ struct parse_opt_ctx_t *);
+
+static int parse_options_step(struct parse_opt_ctx_t *ctx,
+ const struct option *options,
+ const char * const usagestr[])
+{
+ int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
+ int excl_short_opt = 1;
+ const char *arg;
+
+ /* we must reset ->opt, unknown short option leave it dangling */
+ ctx->opt = NULL;
+
+ for (; ctx->argc; ctx->argc--, ctx->argv++) {
+ arg = ctx->argv[0];
+ if (*arg != '-' || !arg[1]) {
+ if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
+ break;
+ ctx->out[ctx->cpidx++] = ctx->argv[0];
+ continue;
+ }
+
+ if (arg[1] != '-') {
+ ctx->opt = ++arg;
+ if (internal_help && *ctx->opt == 'h') {
+ return usage_with_options_internal(usagestr, options, 0, ctx);
+ }
+ switch (parse_short_opt(ctx, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options, arg, 1);
+ case -2:
+ goto unknown;
+ case -3:
+ goto exclusive;
+ default:
+ break;
+ }
+ if (ctx->opt)
+ check_typos(arg, options);
+ while (ctx->opt) {
+ if (internal_help && *ctx->opt == 'h')
+ return usage_with_options_internal(usagestr, options, 0, ctx);
+ arg = ctx->opt;
+ switch (parse_short_opt(ctx, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options, arg, 1);
+ case -2:
+ /* fake a short option thing to hide the fact that we may have
+ * started to parse aggregated stuff
+ *
+ * This is leaky, too bad.
+ */
+ ctx->argv[0] = strdup(ctx->opt - 1);
+ *(char *)ctx->argv[0] = '-';
+ goto unknown;
+ case -3:
+ goto exclusive;
+ default:
+ break;
+ }
+ }
+ continue;
+ }
+
+ if (!arg[2]) { /* "--" */
+ if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
+ ctx->argc--;
+ ctx->argv++;
+ }
+ break;
+ }
+
+ arg += 2;
+ if (internal_help && !strcmp(arg, "help-all"))
+ return usage_with_options_internal(usagestr, options, 1, ctx);
+ if (internal_help && !strcmp(arg, "help"))
+ return usage_with_options_internal(usagestr, options, 0, ctx);
+ if (!strcmp(arg, "list-opts"))
+ return PARSE_OPT_LIST_OPTS;
+ if (!strcmp(arg, "list-cmds"))
+ return PARSE_OPT_LIST_SUBCMDS;
+ switch (parse_long_opt(ctx, arg, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options, arg, 0);
+ case -2:
+ goto unknown;
+ case -3:
+ excl_short_opt = 0;
+ goto exclusive;
+ default:
+ break;
+ }
+ continue;
+unknown:
+ if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
+ return PARSE_OPT_UNKNOWN;
+ ctx->out[ctx->cpidx++] = ctx->argv[0];
+ ctx->opt = NULL;
+ }
+ return PARSE_OPT_DONE;
+
+exclusive:
+ parse_options_usage(usagestr, options, arg, excl_short_opt);
+ if ((excl_short_opt && ctx->excl_opt->short_name) ||
+ ctx->excl_opt->long_name == NULL) {
+ char opt = ctx->excl_opt->short_name;
+ parse_options_usage(NULL, options, &opt, 1);
+ } else {
+ parse_options_usage(NULL, options, ctx->excl_opt->long_name, 0);
+ }
+ return PARSE_OPT_HELP;
+}
+
+static int parse_options_end(struct parse_opt_ctx_t *ctx)
+{
+ memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
+ ctx->out[ctx->cpidx + ctx->argc] = NULL;
+ return ctx->cpidx + ctx->argc;
+}
+
+int parse_options_subcommand(int argc, const char **argv, const struct option *options,
+ const char *const subcommands[], const char *usagestr[], int flags)
+{
+ struct parse_opt_ctx_t ctx;
+
+ /* build usage string if it's not provided */
+ if (subcommands && !usagestr[0]) {
+ char *buf = NULL;
+
+ astrcatf(&buf, "%s %s [<options>] {", subcmd_config.exec_name, argv[0]);
+
+ for (int i = 0; subcommands[i]; i++) {
+ if (i)
+ astrcat(&buf, "|");
+ astrcat(&buf, subcommands[i]);
+ }
+ astrcat(&buf, "}");
+
+ usagestr[0] = buf;
+ }
+
+ parse_options_start(&ctx, argc, argv, flags);
+ switch (parse_options_step(&ctx, options, usagestr)) {
+ case PARSE_OPT_HELP:
+ exit(129);
+ case PARSE_OPT_DONE:
+ break;
+ case PARSE_OPT_LIST_OPTS:
+ while (options->type != OPTION_END) {
+ if (options->long_name)
+ printf("--%s ", options->long_name);
+ options++;
+ }
+ putchar('\n');
+ exit(130);
+ case PARSE_OPT_LIST_SUBCMDS:
+ if (subcommands) {
+ for (int i = 0; subcommands[i]; i++)
+ printf("%s ", subcommands[i]);
+ }
+ putchar('\n');
+ exit(130);
+ default: /* PARSE_OPT_UNKNOWN */
+ if (ctx.argv[0][1] == '-')
+ astrcatf(&error_buf, "unknown option `%s'",
+ ctx.argv[0] + 2);
+ else
+ astrcatf(&error_buf, "unknown switch `%c'", *ctx.opt);
+ usage_with_options(usagestr, options);
+ }
+
+ return parse_options_end(&ctx);
+}
+
+int parse_options(int argc, const char **argv, const struct option *options,
+ const char * const usagestr[], int flags)
+{
+ return parse_options_subcommand(argc, argv, options, NULL,
+ (const char **) usagestr, flags);
+}
+
+#define USAGE_OPTS_WIDTH 24
+#define USAGE_GAP 2
+
+static void print_option_help(const struct option *opts, int full)
+{
+ size_t pos;
+ int pad;
+
+ if (opts->type == OPTION_GROUP) {
+ fputc('\n', stderr);
+ if (*opts->help)
+ fprintf(stderr, "%s\n", opts->help);
+ return;
+ }
+ if (!full && (opts->flags & PARSE_OPT_HIDDEN))
+ return;
+ if (opts->flags & PARSE_OPT_DISABLED)
+ return;
+
+ pos = fprintf(stderr, " ");
+ if (opts->short_name)
+ pos += fprintf(stderr, "-%c", opts->short_name);
+ else
+ pos += fprintf(stderr, " ");
+
+ if (opts->long_name && opts->short_name)
+ pos += fprintf(stderr, ", ");
+ if (opts->long_name)
+ pos += fprintf(stderr, "--%s", opts->long_name);
+
+ switch (opts->type) {
+ case OPTION_ARGUMENT:
+ break;
+ case OPTION_LONG:
+ case OPTION_ULONG:
+ case OPTION_U64:
+ case OPTION_INTEGER:
+ case OPTION_UINTEGER:
+ if (opts->flags & PARSE_OPT_OPTARG)
+ if (opts->long_name)
+ pos += fprintf(stderr, "[=<n>]");
+ else
+ pos += fprintf(stderr, "[<n>]");
+ else
+ pos += fprintf(stderr, " <n>");
+ break;
+ case OPTION_CALLBACK:
+ if (opts->flags & PARSE_OPT_NOARG)
+ break;
+ /* FALLTHROUGH */
+ case OPTION_STRING:
+ if (opts->argh) {
+ if (opts->flags & PARSE_OPT_OPTARG)
+ if (opts->long_name)
+ pos += fprintf(stderr, "[=<%s>]", opts->argh);
+ else
+ pos += fprintf(stderr, "[<%s>]", opts->argh);
+ else
+ pos += fprintf(stderr, " <%s>", opts->argh);
+ } else {
+ if (opts->flags & PARSE_OPT_OPTARG)
+ if (opts->long_name)
+ pos += fprintf(stderr, "[=...]");
+ else
+ pos += fprintf(stderr, "[...]");
+ else
+ pos += fprintf(stderr, " ...");
+ }
+ break;
+ default: /* OPTION_{BIT,BOOLEAN,SET_UINT,SET_PTR} */
+ case OPTION_END:
+ case OPTION_GROUP:
+ case OPTION_BIT:
+ case OPTION_BOOLEAN:
+ case OPTION_INCR:
+ case OPTION_SET_UINT:
+ case OPTION_SET_PTR:
+ break;
+ }
+
+ if (pos <= USAGE_OPTS_WIDTH)
+ pad = USAGE_OPTS_WIDTH - pos;
+ else {
+ fputc('\n', stderr);
+ pad = USAGE_OPTS_WIDTH;
+ }
+ fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
+ if (opts->flags & PARSE_OPT_NOBUILD)
+ fprintf(stderr, "%*s(not built-in because %s)\n",
+ USAGE_OPTS_WIDTH + USAGE_GAP, "",
+ opts->build_opt);
+}
+
+static int option__cmp(const void *va, const void *vb)
+{
+ const struct option *a = va, *b = vb;
+ int sa = tolower(a->short_name), sb = tolower(b->short_name), ret;
+
+ if (sa == 0)
+ sa = 'z' + 1;
+ if (sb == 0)
+ sb = 'z' + 1;
+
+ ret = sa - sb;
+
+ if (ret == 0) {
+ const char *la = a->long_name ?: "",
+ *lb = b->long_name ?: "";
+ ret = strcmp(la, lb);
+ }
+
+ return ret;
+}
+
+static struct option *options__order(const struct option *opts)
+{
+ int nr_opts = 0, nr_group = 0, len;
+ const struct option *o = opts;
+ struct option *opt, *ordered, *group;
+
+ for (o = opts; o->type != OPTION_END; o++)
+ ++nr_opts;
+
+ len = sizeof(*o) * (nr_opts + 1);
+ ordered = malloc(len);
+ if (!ordered)
+ goto out;
+ memcpy(ordered, opts, len);
+
+ /* sort each option group individually */
+ for (opt = group = ordered; opt->type != OPTION_END; opt++) {
+ if (opt->type == OPTION_GROUP) {
+ qsort(group, nr_group, sizeof(*opt), option__cmp);
+ group = opt + 1;
+ nr_group = 0;
+ continue;
+ }
+ nr_group++;
+ }
+ qsort(group, nr_group, sizeof(*opt), option__cmp);
+
+out:
+ return ordered;
+}
+
+static bool option__in_argv(const struct option *opt, const struct parse_opt_ctx_t *ctx)
+{
+ int i;
+
+ for (i = 1; i < ctx->argc; ++i) {
+ const char *arg = ctx->argv[i];
+
+ if (arg[0] != '-') {
+ if (arg[1] == '\0') {
+ if (arg[0] == opt->short_name)
+ return true;
+ continue;
+ }
+
+ if (opt->long_name && strcmp(opt->long_name, arg) == 0)
+ return true;
+
+ if (opt->help && strcasestr(opt->help, arg) != NULL)
+ return true;
+
+ continue;
+ }
+
+ if (arg[1] == opt->short_name ||
+ (arg[1] == '-' && opt->long_name && strcmp(opt->long_name, arg + 2) == 0))
+ return true;
+ }
+
+ return false;
+}
+
+static int usage_with_options_internal(const char * const *usagestr,
+ const struct option *opts, int full,
+ struct parse_opt_ctx_t *ctx)
+{
+ struct option *ordered;
+
+ if (!usagestr)
+ return PARSE_OPT_HELP;
+
+ setup_pager();
+
+ if (error_buf) {
+ fprintf(stderr, " Error: %s\n", error_buf);
+ zfree(&error_buf);
+ }
+
+ fprintf(stderr, "\n Usage: %s\n", *usagestr++);
+ while (*usagestr && **usagestr)
+ fprintf(stderr, " or: %s\n", *usagestr++);
+ while (*usagestr) {
+ fprintf(stderr, "%s%s\n",
+ **usagestr ? " " : "",
+ *usagestr);
+ usagestr++;
+ }
+
+ if (opts->type != OPTION_GROUP)
+ fputc('\n', stderr);
+
+ ordered = options__order(opts);
+ if (ordered)
+ opts = ordered;
+
+ for ( ; opts->type != OPTION_END; opts++) {
+ if (ctx && ctx->argc > 1 && !option__in_argv(opts, ctx))
+ continue;
+ print_option_help(opts, full);
+ }
+
+ fputc('\n', stderr);
+
+ free(ordered);
+
+ return PARSE_OPT_HELP;
+}
+
+void usage_with_options(const char * const *usagestr,
+ const struct option *opts)
+{
+ usage_with_options_internal(usagestr, opts, 0, NULL);
+ exit(129);
+}
+
+void usage_with_options_msg(const char * const *usagestr,
+ const struct option *opts, const char *fmt, ...)
+{
+ va_list ap;
+ char *tmp = error_buf;
+
+ va_start(ap, fmt);
+ if (vasprintf(&error_buf, fmt, ap) == -1)
+ die("vasprintf failed");
+ va_end(ap);
+
+ free(tmp);
+
+ usage_with_options_internal(usagestr, opts, 0, NULL);
+ exit(129);
+}
+
+int parse_options_usage(const char * const *usagestr,
+ const struct option *opts,
+ const char *optstr, bool short_opt)
+{
+ if (!usagestr)
+ goto opt;
+
+ fprintf(stderr, "\n Usage: %s\n", *usagestr++);
+ while (*usagestr && **usagestr)
+ fprintf(stderr, " or: %s\n", *usagestr++);
+ while (*usagestr) {
+ fprintf(stderr, "%s%s\n",
+ **usagestr ? " " : "",
+ *usagestr);
+ usagestr++;
+ }
+ fputc('\n', stderr);
+
+opt:
+ for ( ; opts->type != OPTION_END; opts++) {
+ if (short_opt) {
+ if (opts->short_name == *optstr) {
+ print_option_help(opts, 0);
+ break;
+ }
+ continue;
+ }
+
+ if (opts->long_name == NULL)
+ continue;
+
+ if (strstarts(opts->long_name, optstr))
+ print_option_help(opts, 0);
+ if (strstarts("no-", optstr) &&
+ strstarts(opts->long_name, optstr + 3))
+ print_option_help(opts, 0);
+ }
+
+ return PARSE_OPT_HELP;
+}
+
+
+int parse_opt_verbosity_cb(const struct option *opt,
+ const char *arg __maybe_unused,
+ int unset)
+{
+ int *target = opt->value;
+
+ if (unset)
+ /* --no-quiet, --no-verbose */
+ *target = 0;
+ else if (opt->short_name == 'v') {
+ if (*target >= 0)
+ (*target)++;
+ else
+ *target = 1;
+ } else {
+ if (*target <= 0)
+ (*target)--;
+ else
+ *target = -1;
+ }
+ return 0;
+}
+
+static struct option *
+find_option(struct option *opts, int shortopt, const char *longopt)
+{
+ for (; opts->type != OPTION_END; opts++) {
+ if ((shortopt && opts->short_name == shortopt) ||
+ (opts->long_name && longopt &&
+ !strcmp(opts->long_name, longopt)))
+ return opts;
+ }
+ return NULL;
+}
+
+void set_option_flag(struct option *opts, int shortopt, const char *longopt,
+ int flag)
+{
+ struct option *opt = find_option(opts, shortopt, longopt);
+
+ if (opt)
+ opt->flags |= flag;
+ return;
+}
+
+void set_option_nobuild(struct option *opts, int shortopt,
+ const char *longopt,
+ const char *build_opt,
+ bool can_skip)
+{
+ struct option *opt = find_option(opts, shortopt, longopt);
+
+ if (!opt)
+ return;
+
+ opt->flags |= PARSE_OPT_NOBUILD;
+ opt->flags |= can_skip ? PARSE_OPT_CANSKIP : 0;
+ opt->build_opt = build_opt;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 05:45:46 +0000