| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Common test driver for encoding and decoding |
| 4 | * |
| 5 | * (c) 2009 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of the mLib utilities library. |
| 11 | * |
| 12 | * mLib is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Library General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of the |
| 15 | * License, or (at your option) any later version. |
| 16 | * |
| 17 | * mLib is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Library General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with mLib; if not, write to the Free |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | * MA 02111-1307, USA. |
| 26 | */ |
| 27 | |
| 28 | /*----- Header files ------------------------------------------------------*/ |
| 29 | |
| 30 | #include "config.h" |
| 31 | |
| 32 | #include <errno.h> |
| 33 | #include <stdio.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <string.h> |
| 36 | |
| 37 | #include "codec.h" |
| 38 | #include "dstr.h" |
| 39 | #include "macros.h" |
| 40 | #include "mdwopt.h" |
| 41 | #include "quis.h" |
| 42 | #include "report.h" |
| 43 | |
| 44 | #include "base64.h" |
| 45 | #include "base32.h" |
| 46 | #include "hex.h" |
| 47 | |
| 48 | /*----- Static variables --------------------------------------------------*/ |
| 49 | |
| 50 | static const codec_class *cctab[] = { |
| 51 | &base64_class, |
| 52 | &base64url_class, |
| 53 | &file64_class, |
| 54 | &base32_class, |
| 55 | &base32hex_class, |
| 56 | &hex_class, |
| 57 | &null_codec_class, |
| 58 | 0, |
| 59 | }; |
| 60 | |
| 61 | static const struct { const char *name; unsigned f; } flagtab[] = { |
| 62 | { "lowerc", CDCF_LOWERC }, |
| 63 | { "igncase", CDCF_IGNCASE }, |
| 64 | { "noeqpad", CDCF_NOEQPAD }, |
| 65 | { "igneqpad", CDCF_IGNEQPAD }, |
| 66 | { "igneqmid", CDCF_IGNEQMID }, |
| 67 | { "ignzpad", CDCF_IGNZPAD }, |
| 68 | { "ignnewl", CDCF_IGNNEWL }, |
| 69 | { "ignspc", CDCF_IGNSPC }, |
| 70 | { "igninvch", CDCF_IGNINVCH }, |
| 71 | { "ignjunk", CDCF_IGNJUNK }, |
| 72 | { 0, 0, } |
| 73 | }; |
| 74 | |
| 75 | /*----- Main code ---------------------------------------------------------*/ |
| 76 | |
| 77 | static void usage(FILE *fp) |
| 78 | { |
| 79 | pquis(fp, |
| 80 | "Usage: $ [-de] [-f FLAGS] [-i INDENT] [-m MAXLINE] [-o OUTPUT]\n" |
| 81 | "\tCODEC [FILE ...]\n"); |
| 82 | } |
| 83 | |
| 84 | static void version(FILE *fp) |
| 85 | { pquis(fp, "$, mLib version " VERSION "\n"); } |
| 86 | |
| 87 | static void help(FILE *fp) |
| 88 | { |
| 89 | int i; |
| 90 | |
| 91 | version(fp); |
| 92 | fputc('\n', fp); |
| 93 | usage(fp); |
| 94 | fputs("\n\ |
| 95 | Encodes and decodes binary files. Options provided:\n\ |
| 96 | \n\ |
| 97 | -h, --help Show this help text.\n\ |
| 98 | -v, --version Show the program's version number.\n\ |
| 99 | -u, --usage Show a terse usage message.\n\ |
| 100 | \n\ |
| 101 | -d, --decode Decode binary FILEs.\n\ |
| 102 | -e, --encode Encode binary FILEs (default).\n\ |
| 103 | -f, --flags=FLAGS Set encoding/decoding FLAGS.\n\ |
| 104 | -i, --indent=INDENT Indent each line with INDENT.\n\ |
| 105 | -m, --maxline=MAXLINE Limit line length to (about) MAXLINE.\n\ |
| 106 | -o, --output=OUTPUT Write encoded/decoded data to OUTPUT.\n\ |
| 107 | \n", fp); |
| 108 | #define ENUM(label, tab, end, getname) do { \ |
| 109 | fputs(label ":", fp); \ |
| 110 | for (i = 0; tab[i]end; i++) fprintf(fp, " %s", tab[i]getname); \ |
| 111 | fputc('\n', fp); \ |
| 112 | } while (0) |
| 113 | ENUM("Codecs", cctab, != 0, ->name); |
| 114 | ENUM("Flags", flagtab, .name, .name); |
| 115 | #undef ENUM |
| 116 | } |
| 117 | |
| 118 | static void code(codec *c, const char *ifile, FILE *ifp, FILE *ofp) |
| 119 | { |
| 120 | dstr d = DSTR_INIT; |
| 121 | char buf[4096]; |
| 122 | size_t n; |
| 123 | int err; |
| 124 | |
| 125 | do { |
| 126 | n = fread(buf, 1, sizeof(buf), ifp); |
| 127 | DRESET(&d); |
| 128 | if ((err = c->ops->code(c, buf, n, &d)) != 0) |
| 129 | die(EXIT_FAILURE, "decoding error: %s", codec_strerror(err)); |
| 130 | } while (fwrite(d.buf, 1, d.len, ofp) == d.len && n == sizeof(buf)); |
| 131 | if (ferror(ifp)) |
| 132 | die(EXIT_FAILURE, "error reading `%s': %s", ifile, strerror(errno)); |
| 133 | } |
| 134 | |
| 135 | int main(int argc, char *argv[]) |
| 136 | { |
| 137 | enum { encode, decode }; |
| 138 | int mode = encode; |
| 139 | const codec_class **cc; |
| 140 | codec *c; |
| 141 | const char *indent = ""; |
| 142 | const char *imode, *omode, *ofile = 0; |
| 143 | unsigned maxline = 64; |
| 144 | unsigned f = CDCF_IGNSPC | CDCF_IGNNEWL; |
| 145 | const char *p; |
| 146 | char *q; |
| 147 | FILE *ifp, *ofp = stdout; |
| 148 | dstr d = DSTR_INIT; |
| 149 | int i; |
| 150 | int sense; |
| 151 | size_t n; |
| 152 | int err; |
| 153 | |
| 154 | #define f_bogus 32768u |
| 155 | |
| 156 | ego(argv[0]); |
| 157 | |
| 158 | for (;;) { |
| 159 | static const struct option opts[] = { |
| 160 | { "help", 0, 0, 'h' }, |
| 161 | { "version", 0, 0, 'v' }, |
| 162 | { "usage", 0, 0, 'u' }, |
| 163 | { "encode", 0, 0, 'e' }, |
| 164 | { "decode", 0, 0, 'd' }, |
| 165 | { "indent", OPTF_ARGREQ, 0, 'i' }, |
| 166 | { "maxline", OPTF_ARGREQ, 0, 'm' }, |
| 167 | { "output", OPTF_ARGREQ, 0, 'o' }, |
| 168 | { "flags", OPTF_ARGREQ, 0, 'f' }, |
| 169 | { 0, 0, 0, 0 } |
| 170 | }; |
| 171 | |
| 172 | if ((i = mdwopt(argc, argv, "hvu" "edf:i:m:o:", opts, 0, 0, 0)) < 0) |
| 173 | break; |
| 174 | switch (i) { |
| 175 | case 'h': help(stdout); exit(0); |
| 176 | case 'v': version(stdout); exit(0); |
| 177 | case 'u': usage(stdout); exit(0); |
| 178 | |
| 179 | case 'e': mode = encode; break; |
| 180 | case 'd': mode = decode; break; |
| 181 | case 'i': indent = optarg; break; |
| 182 | case 'o': ofile = optarg; break; |
| 183 | |
| 184 | case 'm': |
| 185 | errno = 0; |
| 186 | maxline = strtoul(optarg, &q, 0); |
| 187 | if (*q || errno) die(EXIT_FAILURE, "bad integer `%s'", optarg); |
| 188 | break; |
| 189 | |
| 190 | case 'f': |
| 191 | p = optarg; |
| 192 | while (*p) { |
| 193 | if (*p == '-') { sense = 0; p++; } |
| 194 | else if (*p == '+') { sense = 1; p++; } |
| 195 | else sense = 1; |
| 196 | n = strcspn(p, ","); |
| 197 | for (i = 0; flagtab[i].name; i++) { |
| 198 | if (strlen(flagtab[i].name) == n && |
| 199 | STRNCMP(flagtab[i].name, ==, p, n)) |
| 200 | goto found; |
| 201 | } |
| 202 | die(EXIT_FAILURE, "unknown flag `%.*s'", (int)n, p); |
| 203 | found: |
| 204 | if (sense) f |= flagtab[i].f; |
| 205 | else f &= ~flagtab[i].f; |
| 206 | p += n; |
| 207 | if (*p == ',') p++; |
| 208 | } |
| 209 | break; |
| 210 | |
| 211 | default: f |= f_bogus; break; |
| 212 | } |
| 213 | } |
| 214 | argv += optind; argc -= optind; |
| 215 | if ((f & f_bogus) || !argc) { usage(stderr); exit(EXIT_FAILURE); } |
| 216 | |
| 217 | for (cc = cctab;; cc++) { |
| 218 | if (!*cc) die(EXIT_FAILURE, "unknown codec `%s'", *argv); |
| 219 | else if (STRCMP(*argv, ==, (*cc)->name)) break; |
| 220 | } |
| 221 | argv++; argc--; |
| 222 | |
| 223 | switch (mode) { |
| 224 | case encode: |
| 225 | DPUTC(&d, '\n'); |
| 226 | for (p = indent;; p++) { |
| 227 | switch (*p) { |
| 228 | case '\\': |
| 229 | p++; |
| 230 | switch (*p) { |
| 231 | case 'a': DPUTC(&d, '\n'); break; |
| 232 | case 'b': DPUTC(&d, '\b'); break; |
| 233 | case 'f': DPUTC(&d, '\f'); break; |
| 234 | case 'n': DPUTC(&d, '\n'); break; |
| 235 | case 'r': DPUTC(&d, '\r'); break; |
| 236 | case 't': DPUTC(&d, '\t'); break; |
| 237 | case 'v': DPUTC(&d, '\v'); break; |
| 238 | case 0: goto done_indent; break; |
| 239 | default: DPUTC(&d, *p); break; |
| 240 | } |
| 241 | break; |
| 242 | case 0: |
| 243 | goto done_indent; |
| 244 | default: |
| 245 | DPUTC(&d, *p); |
| 246 | break; |
| 247 | } |
| 248 | } |
| 249 | done_indent: |
| 250 | DPUTZ(&d); |
| 251 | c = (*cc)->encoder(f, d.buf, maxline); |
| 252 | imode = "rb"; omode = "w"; |
| 253 | break; |
| 254 | case decode: |
| 255 | c = (*cc)->decoder(f); |
| 256 | imode = "r"; omode = "wb"; |
| 257 | break; |
| 258 | default: |
| 259 | abort(); |
| 260 | } |
| 261 | |
| 262 | if (ofile && (ofp = fopen(ofile, omode)) == 0) { |
| 263 | die(EXIT_FAILURE, "couldn't open `%s' for writing: %s", |
| 264 | ofile, strerror(errno)); |
| 265 | } |
| 266 | |
| 267 | if (mode == encode) fwrite(d.buf + 1, 1, d.len - 1, ofp); |
| 268 | if (!argc) |
| 269 | code(c, "<stdin>", stdin, ofp); |
| 270 | else for (i = 0; i < argc; i++) { |
| 271 | if (STRCMP(argv[i], ==, "-")) |
| 272 | code(c, "<stdin>", stdin, ofp); |
| 273 | else if ((ifp = fopen(argv[i], imode)) == 0) { |
| 274 | die(EXIT_FAILURE, "couldn't open `%s' for reading: %s", |
| 275 | argv[i], strerror(errno)); |
| 276 | } else { |
| 277 | code(c, argv[i], ifp, ofp); |
| 278 | fclose(ifp); |
| 279 | } |
| 280 | } |
| 281 | DRESET(&d); |
| 282 | if ((err = c->ops->code(c, 0, 0, &d)) != 0) |
| 283 | die(EXIT_FAILURE, "decoding error: %s", codec_strerror(err)); |
| 284 | if (mode == encode) DPUTC(&d, '\n'); |
| 285 | fwrite(d.buf, 1, d.len, ofp); |
| 286 | c->ops->destroy(c); DDESTROY(&d); |
| 287 | |
| 288 | if (ferror(ofp) || fflush(ofp) || fclose(ofp)) { |
| 289 | die(EXIT_FAILURE, "error writing to `%s': %s", |
| 290 | ofile ? ofile : "<stdout>", strerror(errno)); |
| 291 | } |
| 292 | return (0); |
| 293 | } |
| 294 | |
| 295 | /*----- That's all, folks -------------------------------------------------*/ |