ceph/src/dpdk/lib/librte_cmdline/cmdline_parse_string.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
  36  * All rights reserved.
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions are met:
  39  *
  40  *     * Redistributions of source code must retain the above copyright
  41  *       notice, this list of conditions and the following disclaimer.
  42  *     * Redistributions in binary form must reproduce the above copyright
  43  *       notice, this list of conditions and the following disclaimer in the
  44  *       documentation and/or other materials provided with the distribution.
  45  *     * Neither the name of the University of California, Berkeley nor the
  46  *       names of its contributors may be used to endorse or promote products
  47  *       derived from this software without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
  50  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  51  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  52  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
  53  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  54  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  55  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  56  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  57  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  58  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  59  */
  60
  61 #include <stdio.h>
  62 #include <inttypes.h>
  63 #include <ctype.h>
  64 #include <string.h>
  65 #include <stdarg.h>
  66 #include <errno.h>
  67 #include <rte_string_fns.h>
  68
  69 #include "cmdline_parse.h"
  70 #include "cmdline_parse_string.h"
  71
  72 struct cmdline_token_ops cmdline_token_string_ops = {
  73         .parse = cmdline_parse_string,
  74         .complete_get_nb = cmdline_complete_get_nb_string,
  75         .complete_get_elt = cmdline_complete_get_elt_string,
  76         .get_help = cmdline_get_help_string,
  77 };
  78
  79 #define CHOICESTRING_HELP "Mul-choice STRING"
  80 #define ANYSTRING_HELP    "Any STRING"
  81 #define ANYSTRINGS_HELP   "Any STRINGS"
  82 #define FIXEDSTRING_HELP  "Fixed STRING"
  83
  84 static unsigned int
  85 get_token_len(const char *s)
  86 {
  87         char c;
  88         unsigned int i=0;
  89
  90         c = s[i];
  91         while (c!='#' && c!='\0') {
  92                 i++;
  93                 c = s[i];
  94         }
  95         return i;
  96 }
  97
  98 static const char *
  99 get_next_token(const char *s)
 100 {
 101         unsigned int i;
 102         i = get_token_len(s);
 103         if (s[i] == '#')
 104                 return s+i+1;
 105         return NULL;
 106 }
 107
 108 int
 109 cmdline_parse_string(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
 110         unsigned ressize)
 111 {
 112         struct cmdline_token_string *tk2;
 113         struct cmdline_token_string_data *sd;
 114         unsigned int token_len;
 115         const char *str;
 116
 117         if (res && ressize < STR_TOKEN_SIZE)
 118                 return -1;
 119
 120         if (!tk || !buf || ! *buf)
 121                 return -1;
 122
 123         tk2 = (struct cmdline_token_string *)tk;
 124
 125         sd = &tk2->string_data;
 126
 127         /* fixed string (known single token) */
 128         if ((sd->str != NULL) && (strcmp(sd->str, TOKEN_STRING_MULTI) != 0)) {
 129                 str = sd->str;
 130                 do {
 131                         token_len = get_token_len(str);
 132
 133                         /* if token is too big... */
 134                         if (token_len >= STR_TOKEN_SIZE - 1) {
 135                                 continue;
 136                         }
 137
 138                         if ( strncmp(buf, str, token_len) ) {
 139                                 continue;
 140                         }
 141
 142                         if ( !cmdline_isendoftoken(*(buf+token_len)) ) {
 143                                 continue;
 144                         }
 145
 146                         break;
 147                 } while ( (str = get_next_token(str)) != NULL );
 148
 149                 if (!str)
 150                         return -1;
 151         }
 152         /* multi string */
 153         else if (sd->str != NULL) {
 154                 if (ressize < STR_MULTI_TOKEN_SIZE)
 155                         return -1;
 156
 157                 token_len = 0;
 158                 while (!cmdline_isendofcommand(buf[token_len]) &&
 159                       token_len < (STR_MULTI_TOKEN_SIZE - 1))
 160                         token_len++;
 161
 162                 /* return if token too long */
 163                 if (token_len >= (STR_MULTI_TOKEN_SIZE - 1))
 164                         return -1;
 165         }
 166         /* unspecified string (unknown single token) */
 167         else {
 168                 token_len = 0;
 169                 while(!cmdline_isendoftoken(buf[token_len]) &&
 170                       token_len < (STR_TOKEN_SIZE-1))
 171                         token_len++;
 172
 173                 /* return if token too long */
 174                 if (token_len >= STR_TOKEN_SIZE - 1) {
 175                         return -1;
 176                 }
 177         }
 178
 179         if (res) {
 180                 if ((sd->str != NULL) && (strcmp(sd->str, TOKEN_STRING_MULTI) == 0))
 181                         /* we are sure that token_len is < STR_MULTI_TOKEN_SIZE-1 */
 182                         snprintf(res, STR_MULTI_TOKEN_SIZE, "%s", buf);
 183                 else
 184                         /* we are sure that token_len is < STR_TOKEN_SIZE-1 */
 185                         snprintf(res, STR_TOKEN_SIZE, "%s", buf);
 186
 187                 *((char *)res + token_len) = 0;
 188         }
 189
 190         return token_len;
 191 }
 192
 193 int cmdline_complete_get_nb_string(cmdline_parse_token_hdr_t *tk)
 194 {
 195         struct cmdline_token_string *tk2;
 196         struct cmdline_token_string_data *sd;
 197         const char *str;
 198         int ret = 1;
 199
 200         if (!tk)
 201                 return -1;
 202
 203         tk2 = (struct cmdline_token_string *)tk;
 204         sd = &tk2->string_data;
 205
 206         if (!sd->str)
 207                 return 0;
 208
 209         str = sd->str;
 210         while( (str = get_next_token(str)) != NULL ) {
 211                 ret++;
 212         }
 213         return ret;
 214 }
 215
 216 int cmdline_complete_get_elt_string(cmdline_parse_token_hdr_t *tk, int idx,
 217                                     char *dstbuf, unsigned int size)
 218 {
 219         struct cmdline_token_string *tk2;
 220         struct cmdline_token_string_data *sd;
 221         const char *s;
 222         unsigned int len;
 223
 224         if (!tk || !dstbuf || idx < 0)
 225                 return -1;
 226
 227         tk2 = (struct cmdline_token_string *)tk;
 228         sd = &tk2->string_data;
 229
 230         s = sd->str;
 231
 232         while (idx-- && s)
 233                 s = get_next_token(s);
 234
 235         if (!s)
 236                 return -1;
 237
 238         len = get_token_len(s);
 239         if (len > size - 1)
 240                 return -1;
 241
 242         memcpy(dstbuf, s, len);
 243         dstbuf[len] = '\0';
 244         return 0;
 245 }
 246
 247
 248 int cmdline_get_help_string(cmdline_parse_token_hdr_t *tk, char *dstbuf,
 249                             unsigned int size)
 250 {
 251         struct cmdline_token_string *tk2;
 252         struct cmdline_token_string_data *sd;
 253         const char *s;
 254
 255         if (!tk || !dstbuf)
 256                 return -1;
 257
 258         tk2 = (struct cmdline_token_string *)tk;
 259         sd = &tk2->string_data;
 260
 261         s = sd->str;
 262
 263         if (s) {
 264                 if (strcmp(s, TOKEN_STRING_MULTI) == 0)
 265                         snprintf(dstbuf, size, ANYSTRINGS_HELP);
 266                 else if (get_next_token(s))
 267                         snprintf(dstbuf, size, CHOICESTRING_HELP);
 268                 else
 269                         snprintf(dstbuf, size, FIXEDSTRING_HELP);
 270         } else
 271                 snprintf(dstbuf, size, ANYSTRING_HELP);
 272
 273         return 0;
 274 }