From: Pallavi Kadam Date: Fri, 7 Feb 2020 03:14:32 +0000 (-0800) Subject: eal/windows: add getopt implementation X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=5e373e456e6;p=dpdk.git eal/windows: add getopt implementation Adding getopt files to support parsing option on Windows. The original contribution is under BSD-2 license. https://github.com/greenplum-db/libusual/blob/master/usual/getopt.c https://github.com/greenplum-db/libusual/blob/master/usual/getopt.h Signed-off-by: Antara Ganesh Kolar Signed-off-by: Pallavi Kadam Reviewed-by: Ranjit Menon Reviewed-by: Keith Wiles Reviewed-by: Dmitry Kozlyuk Tested-by: Narcisa Ana Maria Vasile Acked-by: Narcisa Ana Maria Vasile --- diff --git a/lib/librte_eal/windows/eal/getopt.c b/lib/librte_eal/windows/eal/getopt.c new file mode 100644 index 0000000000..170c9b5e0c --- /dev/null +++ b/lib/librte_eal/windows/eal/getopt.c @@ -0,0 +1,470 @@ +/* SPDX-License-Identifier: ISC AND BSD-2-Clause + * Copyright (c) 2002 Todd C. Miller + * + * Sponsored in part by the Defense Advanced Research Projects + * Agency (DARPA) and Air Force Research Laboratory, Air Force + * Materiel Command, USAF, under agreement number F39502-99-1-0512. + */ +/* + * Copyright (c) 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Dieter Baron and Thomas Klausner. + */ + +#include + +#ifdef NEED_USUAL_GETOPT + +#include +#include + +const char *optarg; /* argument associated with option */ +int opterr = 1; /* if error message should be printed */ +int optind = 1; /* index into parent argv vector */ +int optopt = '?'; /* character checked for validity */ + +static void pass(void) {} +#define warnx(a, ...) pass() + +#define PRINT_ERROR ((opterr) && (*options != ':')) + +#define FLAG_PERMUTE 0x01 /* permute non-options to the end of argv */ +#define FLAG_ALLARGS 0x02 /* treat non-options as args to option "-1" */ +#define FLAG_LONGONLY 0x04 /* operate as getopt_long_only */ + +/* return values */ +#define BADCH ((int)'?') +#define BADARG ((*options == ':') ? (int)':' : (int)'?') +#define INORDER 1 + +#define EMSG "" + +static const char *place = EMSG; /* option letter processing */ + +/* XXX: set optreset to 1 rather than these two */ +static int nonopt_start = -1; /* first non option argument (for permute) */ +static int nonopt_end = -1; /* first option after non options (for permute) */ + +/* Error messages */ +static const char recargchar[] = "option requires an argument -- %c"; +static const char recargstring[] = "option requires an argument -- %s"; +static const char ambig[] = "ambiguous option -- %.*s"; +static const char noarg[] = "option doesn't take an argument -- %.*s"; +static const char illoptchar[] = "unknown option -- %c"; +static const char illoptstring[] = "unknown option -- %s"; + +/* + * Compute the greatest common divisor of a and b. + */ +static int +gcd(int a, int b) +{ + int c; + + c = a % b; + while (c != 0) { + a = b; + b = c; + c = a % b; + } + + return (b); +} + +/* + * Exchange the block from nonopt_start to nonopt_end with the block + * from nonopt_end to opt_end (keeping the same order of arguments + * in each block). + */ +static void +permute_args(int panonopt_start, int panonopt_end, int opt_end, + char **nargv) +{ + int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos; + char *swap; + + /* + * compute lengths of blocks and number and size of cycles + */ + nnonopts = panonopt_end - panonopt_start; + nopts = opt_end - panonopt_end; + ncycle = gcd(nnonopts, nopts); + cyclelen = (opt_end - panonopt_start) / ncycle; + + for (i = 0; i < ncycle; i++) { + cstart = panonopt_end+i; + pos = cstart; + for (j = 0; j < cyclelen; j++) { + if (pos >= panonopt_end) + pos -= nnonopts; + else + pos += nopts; + swap = nargv[pos]; + /* LINTED const cast */ + ((char **) nargv)[pos] = nargv[cstart]; + /* LINTED const cast */ + ((char **)nargv)[cstart] = swap; + } + } +} + +/* + * parse_long_options -- + * Parse long options in argc/argv argument vector. + * Returns -1 if short_too is set and the option does not match long_options. + */ +static int +parse_long_options(char **nargv, const char *options, + const struct option *long_options, int *idx, int short_too) +{ + const char *current_argv; + char *has_equal; + size_t current_argv_len; + int i, match; + + current_argv = place; + match = -1; + + optind++; + + has_equal = strchr(current_argv, '='); + if (has_equal != NULL) { + /* argument found (--option=arg) */ + current_argv_len = has_equal - current_argv; + has_equal++; + } else + current_argv_len = strlen(current_argv); + + for (i = 0; long_options[i].name; i++) { + /* find matching long option */ + if (strncmp(current_argv, long_options[i].name, + current_argv_len)) + continue; + + if (strlen(long_options[i].name) == current_argv_len) { + /* exact match */ + match = i; + break; + } + /* + * If this is a known short option, don't allow + * a partial match of a single character. + */ + if (short_too && current_argv_len == 1) + continue; + + if (match == -1) /* partial match */ + match = i; + else { + /* ambiguous abbreviation */ + if (PRINT_ERROR) + warnx(ambig, (int)current_argv_len, + current_argv); + optopt = 0; + return BADCH; + } + } + if (match != -1) { /* option found */ + if (long_options[match].has_arg == no_argument + && has_equal) { + if (PRINT_ERROR) + warnx(noarg, (int)current_argv_len, + current_argv); + /* + * XXX: GNU sets optopt to val regardless of flag + */ + if (long_options[match].flag == NULL) + optopt = long_options[match].val; + else + optopt = 0; + return BADARG; + } + if (long_options[match].has_arg == required_argument || + long_options[match].has_arg == optional_argument) { + if (has_equal) + optarg = has_equal; + else if (long_options[match].has_arg == + required_argument) { + /* + * optional argument doesn't use next nargv + */ + optarg = nargv[optind++]; + } + } + if ((long_options[match].has_arg == required_argument) + && (optarg == NULL)) { + /* + * Missing argument; leading ':' indicates no error + * should be generated. + */ + if (PRINT_ERROR) + warnx(recargstring, + current_argv); + /* + * XXX: GNU sets optopt to val regardless of flag + */ + if (long_options[match].flag == NULL) + optopt = long_options[match].val; + else + optopt = 0; + --optind; + return BADARG; + } + } else { /* unknown option */ + if (short_too) { + --optind; + return (-1); + } + if (PRINT_ERROR) + warnx(illoptstring, current_argv); + optopt = 0; + return BADCH; + } + if (idx) + *idx = match; + if (long_options[match].flag) { + *long_options[match].flag = long_options[match].val; + return 0; + } else + return (long_options[match].val); +} + +/* + * getopt_internal -- + * Parse argc/argv argument vector. Called by user level routines. + */ +static int +getopt_internal(int nargc, char **nargv, const char *options, + const struct option *long_options, int *idx, int flags) +{ + char *oli; /* option letter list index */ + int optchar, short_too; + static int posixly_correct = -1; + char *buf; + size_t len; + int optreset = 0; + + if (options == NULL) + return (-1); + + /* + * Disable GNU extensions if POSIXLY_CORRECT is set or options + * string begins with a '+'. + */ + if (posixly_correct == -1) + posixly_correct = _dupenv_s(&buf, &len, "POSIXLY_CORRECT"); + if (!posixly_correct || *options == '+') + flags &= ~FLAG_PERMUTE; + else if (*options == '-') + flags |= FLAG_ALLARGS; + if (*options == '+' || *options == '-') + options++; + if (!posixly_correct) + free(buf); + /* + * reset if requested + */ + if (optind == 0) + optind = optreset = 1; + + optarg = NULL; + if (optreset) + nonopt_start = nonopt_end = -1; +start: + if (optreset || !*place) { /* update scanning pointer */ + optreset = 0; + if (optind >= nargc) { /* end of argument vector */ + place = EMSG; + if (nonopt_end != -1) { + /* do permutation, if we have to */ + permute_args(nonopt_start, nonopt_end, + optind, nargv); + optind -= nonopt_end - nonopt_start; + } else if (nonopt_start != -1) { + /* + * If we skipped non-options, set optind + * to the first of them. + */ + optind = nonopt_start; + } + nonopt_start = nonopt_end = -1; + return (-1); + } + place = nargv[optind]; + if (*place != '-' || + (place[1] == '\0' && strchr(options, '-') == NULL)) { + place = EMSG; /* found non-option */ + if (flags & FLAG_ALLARGS) { + /* + * GNU extension: + * return non-option as argument to option 1 + */ + optarg = nargv[optind++]; + return INORDER; + } + if (!(flags & FLAG_PERMUTE)) { + /* + * If no permutation wanted, stop parsing + * at first non-option. + */ + return (-1); + } + /* do permutation */ + if (nonopt_start == -1) + nonopt_start = optind; + else if (nonopt_end != -1) { + permute_args(nonopt_start, nonopt_end, + optind, nargv); + nonopt_start = optind - + (nonopt_end - nonopt_start); + nonopt_end = -1; + } + optind++; + /* process next argument */ + goto start; + } + if (nonopt_start != -1 && nonopt_end == -1) + nonopt_end = optind; + + /* + * If we have "-" do nothing, if "--" we are done. + */ + if (place[1] != '\0' && *++place == '-' && place[1] == '\0') { + optind++; + place = EMSG; + /* + * We found an option (--), so if we skipped + * non-options, we have to permute. + */ + if (nonopt_end != -1) { + permute_args(nonopt_start, nonopt_end, + optind, nargv); + optind -= nonopt_end - nonopt_start; + } + nonopt_start = nonopt_end = -1; + return (-1); + } + } + + /* + * Check long options if: + * 1) we were passed some + * 2) the arg is not just "-" + * 3) either the arg starts with -- we are getopt_long_only() + */ + if (long_options != NULL && place != nargv[optind] && + (*place == '-' || (flags & FLAG_LONGONLY))) { + short_too = 0; + if (*place == '-') + place++; /* --foo long option */ + else if (*place != ':' && strchr(options, *place) != NULL) + short_too = 1; /* could be short option too */ + + optchar = parse_long_options(nargv, options, long_options, + idx, short_too); + if (optchar != -1) { + place = EMSG; + return optchar; + } + } + + optchar = (int)*place++; + oli = strchr(options, optchar); + if (optchar == (int)':' || + (optchar == (int)'-' && *place != '\0') || + oli == NULL) { + /* + * If the user specified "-" and '-' isn't listed in + * options, return -1 (non-option) as per POSIX. + * Otherwise, it is an unknown option character (or ':'). + */ + if (optchar == (int)'-' && *place == '\0') + return (-1); + if (!*place) + ++optind; + if (PRINT_ERROR) + warnx(illoptchar, optchar); + optopt = optchar; + return BADCH; + } + if (long_options != NULL && optchar == 'W' && oli[1] == ';') { + /* -W long-option */ + if (*place) + ; + else if (++optind >= nargc) { /* no arg */ + place = EMSG; + if (PRINT_ERROR) + warnx(recargchar, optchar); + optopt = optchar; + return BADARG; + } /* white space */ + place = nargv[optind]; + optchar = parse_long_options(nargv, options, long_options, + idx, 0); + place = EMSG; + return optchar; + } + if (*++oli != ':') { /* doesn't take argument */ + if (!*place) + ++optind; + } else { /* takes (optional) argument */ + optarg = NULL; + if (*place) /* no white space */ + optarg = place; + else if (oli[1] != ':') { /* arg not optional */ + if (++optind >= nargc) { /* no arg */ + place = EMSG; + if (PRINT_ERROR) + warnx(recargchar, optchar); + optopt = optchar; + return BADARG; + } + optarg = nargv[optind]; + } + place = EMSG; + ++optind; + } + /* dump back option letter */ + return optchar; +} + +/* + * getopt -- + * Parse argc/argv argument vector. + */ +int +getopt(int nargc, char *nargv[], const char *options) +{ + return getopt_internal(nargc, nargv, options, NULL, NULL, + FLAG_PERMUTE); +} + +/* + * getopt_long -- + * Parse argc/argv argument vector. + */ +int +getopt_long(int nargc, char *nargv[], const char *options, + const struct option *long_options, int *idx) +{ + + return (getopt_internal(nargc, nargv, options, long_options, idx, + FLAG_PERMUTE)); +} + +/* + * getopt_long_only -- + * Parse argc/argv argument vector. + */ +int +getopt_long_only(int nargc, char *nargv[], const char *options, + const struct option *long_options, int *idx) +{ + + return (getopt_internal(nargc, nargv, options, long_options, idx, + FLAG_PERMUTE|FLAG_LONGONLY)); +} + +#endif /* NEED_USUAL_GETOPT */ diff --git a/lib/librte_eal/windows/eal/include/getopt.h b/lib/librte_eal/windows/eal/include/getopt.h new file mode 100644 index 0000000000..2eebe54e35 --- /dev/null +++ b/lib/librte_eal/windows/eal/include/getopt.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: BSD-2-Clause + * Copyright (c) 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Dieter Baron and Thomas Klausner. + */ + +/** + * @file + * getopt compat. + * + * This module provides getopt() and getopt_long(). + */ + +#ifndef _USUAL_GETOPT_H_ +#define _USUAL_GETOPT_H_ + +#ifndef NEED_USUAL_GETOPT +#if !defined(HAVE_GETOPT_H) || !defined(HAVE_GETOPT) || \ + !defined(HAVE_GETOPT_LONG) +#define NEED_USUAL_GETOPT +#endif +#endif + +#ifndef NEED_USUAL_GETOPT + +/* Use system getopt */ +#include + +#else /* NEED_USUAL_GETOPT */ + +/* avoid name collision */ +#define optarg usual_optarg +#define opterr usual_opterr +#define optind usual_optind +#define optopt usual_optopt +#define getopt(a, b, c) usual_getopt(a, b, c) +#define getopt_long(a, b, c, d, e) usual_getopt_long(a, b, c, d, e) + + +/** argument to current option, or NULL if it has none */ +extern const char *optarg; +/** Current position in arg string. Starts from 1. + * Setting to 0 resets state. + */ +extern int optind; +/** whether getopt() should print error messages on problems. Default: 1. */ +extern int opterr; +/** Option char which caused error */ +extern int optopt; + +/** long option takes no argument */ +#define no_argument 0 +/** long option requires argument */ +#define required_argument 1 +/** long option has optional argument */ +#define optional_argument 2 + +/** Long option description */ +struct option { + /** name of long option */ + const char *name; + + /** + * whether option takes an argument. + * One of no_argument, required_argument, and optional_argument. + */ + int has_arg; + + /** if not NULL, set *flag to val when option found */ + int *flag; + + /** if flag not NULL, value to set *flag to; else return value */ + int val; +}; + +/** Compat: getopt */ +int getopt(int argc, char *argv[], const char *options); + +/** Compat: getopt_long */ +int getopt_long(int argc, char *argv[], const char *options, + const struct option *longopts, int *longindex); + +/** Compat: getopt_long_only */ +int getopt_long_only(int nargc, char *argv[], const char *options, + const struct option *long_options, int *idx); + + +#endif /* NEED_USUAL_GETOPT */ + +#endif /* !_USUAL_GETOPT_H_ */ diff --git a/lib/librte_eal/windows/eal/meson.build b/lib/librte_eal/windows/eal/meson.build index af4f70f009..d372221580 100644 --- a/lib/librte_eal/windows/eal/meson.build +++ b/lib/librte_eal/windows/eal/meson.build @@ -17,4 +17,5 @@ env_sources = files('eal.c', 'eal_debug.c', 'eal_lcore.c', 'eal_thread.c', + 'getopt.c', )