mdw@git.distorted.org.uk Git - mLib/blob - test/tvec-main.c

   1 /* -*-c-*-
   2  *
   3  * Main entry point for test-vector processing
   4  *
   5  * (c) 2023 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 it under
  13  * the terms of the GNU Library General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or (at
  15  * your option) any later version.
  16  *
  17  * mLib is distributed in the hope that it will be useful, but WITHOUT
  18  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
  20  * 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 Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25  * USA.
  26  */
  27
  28 /*----- Header files ------------------------------------------------------*/
  29
  30 #include "config.h"
  31
  32 #include <ctype.h>
  33 #include <errno.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include <unistd.h>
  39
  40 #include "bench.h"
  41 #include "dstr.h"
  42 #include "macros.h"
  43 #include "mdwopt.h"
  44 #include "quis.h"
  45 #include "report.h"
  46
  47 #include "tvec.h"
  48 #include "tvec-adhoc.h"
  49 #include "tvec-bench.h"
  50 #include "tvec-types.h"
  51
  52 /*----- Main code ---------------------------------------------------------*/
  53
  54 /* Table of output formats. */
  55 static const struct outform {
  56   const char *name;
  57   struct tvec_output *(*makefn)(FILE *fp);
  58 } outtab[] = {
  59   { "human",            tvec_humanoutput },
  60   { "machine",          tvec_machineoutput },
  61   { "tap",              tvec_tapoutput },
  62   { 0,                  0 }
  63 };
  64
  65 /* Configuration for ad-hoc testing. */
  66 const struct tvec_config tvec_adhocconfig =
  67   { 0, 1, 1, sizeof(struct tvec_reg) };
  68
  69 /* Common benchmark state. */
  70 static struct bench_state bench;
  71
  72 /* --- @find_outform@ ---
  73  *
  74  * Arguments:   @const char *p@ = output name
  75  *
  76  * Returns:     Pointer to output format record.
  77  *
  78  * Use:         Looks up an output format by name.  Reports a fatal error if
  79  *              no matching record is found.
  80  */
  81
  82 static const struct outform *find_outform(const char *p)
  83 {
  84   const struct outform *best = 0, *of;
  85   size_t n = strlen(p);
  86
  87   for (of = outtab; of->name; of++)
  88     if (!STRNCMP(p, ==, of->name, n))
  89       ;
  90     else if (!of->name[n])
  91       return (of);
  92     else if (best)
  93       die(2, "ambiguous output format name (`%s' or `%s'?)",
  94           best->name, of->name);
  95     else
  96       best = of;
  97   if (best) return (best);
  98   else die(2, "unknown output format `%s'", optarg);
  99 }
 100
 101 /* --- @version@, @usage@, @help@ --- *
 102  *
 103  * Arguments:   @FILE *fp@ = stream to write on
 104  *
 105  * Returns:     ---
 106  *
 107  * Use:         Output information about the program.
 108  */
 109
 110 static void version(FILE *fp)
 111   { pquis(fp, "$, mLib test-vector framework version " VERSION "\n"); }
 112
 113 static void usage(FILE *fp)
 114 {
 115   pquis(fp, "\
 116 usage: $ [-B CONFIG] [-f FORMAT] [-o OUTPUT] [-t SECS] [TEST-FILE ...]\n\
 117 ");
 118 }
 119
 120 static void help(FILE *fp)
 121 {
 122   version(fp); fputc('\n', fp);
 123   usage(fp); fputs("\
 124 Options:\n\
 125   -h, --help                    show this help text.\n\
 126   -v, --version                 show version number.\n\
 127   -u, --usage                   show usage synopsis.\n\
 128 \n\
 129   -B, --bench-config=CONFIG     set benchmark configuration string.\n\
 130   -f, --format=FORMAT           produce output in FORMAT.\n\
 131   -o, --output=OUTPUT           write output to OUTPUT file.\n\
 132   -t, --target-time=DURATION    run benchmarks for DURATION.\n\
 133 ", fp);
 134 }
 135
 136 /* --- @tvec_parseargs@ --- *
 137  *
 138  * Arguments:   @int argc@ = number of command-line arguments
 139  *              @char *argv[]@ = vector of argument strings
 140  *              @struct tvec_state *tv_out@ = test vector state to initialize
 141  *              @int *argpos_out@ = where to leave unread argument index
 142  *              @const struct tvec_config *cofig@ = test vector configuration
 143  *
 144  * Returns:     ---
 145  *
 146  * Use:         Parse arguments and set up the test vector state @*tv_out@.
 147  *              If errors occur, print messages to standard error and exit
 148  *              with status 2.
 149  *
 150  *              This function also establishes a common benchmark state.
 151  */
 152
 153 void tvec_parseargs(int argc, char *argv[], struct tvec_state *tv_out,
 154                     int *argpos_out, const struct tvec_config *config)
 155 {
 156   FILE *ofp = 0;
 157   const struct outform *of = 0;
 158   struct tvec_output *o;
 159   const char *benchconf = 0;
 160   double benchtime = 1.0, scale;
 161   struct bench_timer *tm;
 162   const char *p; char *q;
 163   int opt;
 164   unsigned f = 0;
 165 #define f_bogus 1u
 166 #define f_bench 2u
 167
 168   static const struct option options[] = {
 169     { "help",           0,              0,      'h' },
 170     { "version",        0,              0,      'v' },
 171     { "usage",          0,              0,      'u' },
 172
 173     { "bench-config",   OPTF_ARGREQ,    0,      'B' },
 174     { "format",         OPTF_ARGREQ,    0,      'f' },
 175     { "output",         OPTF_ARGREQ,    0,      'o' },
 176     { "target-time",    OPTF_ARGREQ,    0,      't' },
 177     { 0,                0,              0,      0 }
 178   };
 179
 180   ego(argv[0]);
 181   for (;;) {
 182     opt = mdwopt(argc, argv, "hvu" "B:f:o:t:", options, 0, 0, 0);
 183     if (opt < 0) break;
 184     switch (opt) {
 185       case 'h': help(stdout); exit(0);
 186       case 'v': version(stdout); exit(0);
 187       case 'u': usage(stdout); exit(0);
 188
 189       case 'B': benchconf = optarg; f |= f_bench; break;
 190       case 'f': of = find_outform(optarg); break;
 191       case 'o':
 192         if (ofp) fclose(ofp);
 193         ofp = fopen(optarg, "w");
 194         if (!ofp)
 195           die(2, "failed to open `%s' for writing: %s",
 196               optarg, strerror(errno));
 197         break;
 198       case 't':
 199         if (*optarg != '.' && !ISDIGIT(*optarg)) goto bad_time;
 200         errno = 0; benchtime = strtod(optarg, &q);
 201         if (errno) goto bad_time;
 202         p = q;
 203         if (ISSPACE(*p)) {
 204           do p++; while (ISSPACE(*p));
 205           if (!*p) goto bad_time;
 206         }
 207         if (tvec_parsedurunit(&scale, &p)) goto bad_time;
 208         if (*p) goto bad_time;
 209         benchtime *= scale; f |= f_bench;
 210         break;
 211       bad_time:
 212         die(2, "invalid time duration `%s'", optarg);
 213
 214       default:
 215         f |= f_bogus;
 216         break;
 217     }
 218   }
 219   if (f&f_bogus) { usage(stderr); exit(2); }
 220   if (!ofp) ofp = stdout;
 221   if (!of) {
 222     p = getenv("TVEC_FORMAT");
 223     if (p) of = find_outform(p);
 224   }
 225   if (of) o = of->makefn(ofp);
 226   else o = tvec_dfltout(ofp);
 227
 228   tm = bench_createtimer(benchconf);
 229   if (tm) {
 230     bench_init(&bench, tm); bench.target_s = benchtime;
 231     tvec_benchstate = &bench;
 232   } else if (f&f_bench) {
 233     moan("failed to create benchmark timer");
 234     if (!getenv("MLIB_BENCH_DEBUG"))
 235       moan("set `MLIB_BENCH_DEBUG=t' in the envionment for more detail");
 236     exit(2);
 237   }
 238
 239   tvec_begin(tv_out, config, o); *argpos_out = optind;
 240 }
 241
 242 /* --- @tvec_readstdin@, @tvec_readfile@, @tvec_readarg@ --- *
 243  *
 244  * Arguments:   @struct tvec_state *tv@ = test vector state
 245  *              @const char *file@ = pathname of file to read
 246  *              @const char *arg@ = argument to interpret
 247  *
 248  * Returns:     Zero on success, @-1@ on error.
 249  *
 250  * Use:         Read test vector data from stdin or a named file.  The
 251  *              @tvec_readarg@ function reads from stdin if @arg@ is `%|-|%',
 252  *              and from the named file otherwise.
 253  */
 254
 255 int tvec_readstdin(struct tvec_state *tv)
 256   { return (tvec_read(tv, "<stdin>", stdin)); }
 257
 258 int tvec_readfile(struct tvec_state *tv, const char *file)
 259 {
 260   FILE *fp = 0;
 261   int rc;
 262
 263   fp = fopen(file, "r");
 264   if (!fp) {
 265     tvec_error(tv, "failed to open `%s' for reading: %s",
 266                file, strerror(errno));
 267     rc = -1; goto end;
 268   }
 269   if (tvec_read(tv, file, fp)) { rc = -1; goto end; }
 270   rc = 0;
 271 end:
 272   if (fp) fclose(fp);
 273   return (rc);
 274 }
 275
 276 int tvec_readarg(struct tvec_state *tv, const char *arg)
 277 {
 278   int rc;
 279
 280   if (STRCMP(arg, ==, "-")) rc = tvec_readstdin(tv);
 281   else rc = tvec_readfile(tv, arg);
 282   return (rc);
 283 }
 284
 285 /* --- @tvec_readdflt@ --- *
 286  *
 287  * Arguments:   @struct tvec_state *tv@ = test vector state
 288  *              @const char *dflt@ = defsault filename or null
 289  *
 290  * Returns:     Zero on success, @-1@ on error.
 291  *
 292  * Use:         Reads from the default test vector data.  If @file@ is null,
 293  *              then read from standard input, unless that's a terminal; if
 294  *              @file@ is not null, then read the named file, looking in the
 295  *              directory named by the `%|srcdir|%' environment variable if
 296  *              that's set, or otherwise in the current directory.
 297  */
 298
 299 int tvec_readdflt(struct tvec_state *tv, const char *dflt)
 300 {
 301   dstr d = DSTR_INIT;
 302   const char *p;
 303   int rc;
 304
 305   if (dflt) {
 306     p = getenv("srcdir");
 307     if (p) { dstr_putf(&d, "%s/%s", p, dflt); dflt = d.buf; }
 308     rc = tvec_readfile(tv, dflt);
 309   } else if (isatty(0))
 310     rc = tvec_error(tv, "use `-' to force reading from interactive stdin");
 311   else
 312     rc = tvec_readstdin(tv);
 313   dstr_destroy(&d);
 314   return (rc);
 315 }
 316
 317 /* --- @tvec_readargs@ --- *
 318  *
 319  * Arguments:   @int argc@ = number of command-line arguments
 320  *              @char *argv[]@ = vector of argument strings
 321  *              @struct tvec_state *tv@ = test vector state
 322  *              @int *argpos_inout@ = current argument position (updated)
 323  *              @const char *dflt@ = default filename or null
 324  *
 325  * Returns:     Zero on success, @-1@ on error.
 326  *
 327  * Use:         Reads from the sources indicated by the command-line
 328  *              arguments, in order, interpreting each as for @tvec_readarg@;
 329  *              if no arguments are given then read from @dflt@ as for
 330  *              @tvec_readdflt@.
 331  */
 332
 333 int tvec_readargs(int argc, char *argv[], struct tvec_state *tv,
 334                    int *argpos_inout, const char *dflt)
 335 {
 336   int i = *argpos_inout;
 337   int rc;
 338
 339   if (i == argc)
 340     rc = tvec_readdflt(tv, dflt);
 341   else {
 342     rc = 0;
 343     while (i < argc)
 344       if (tvec_readarg(tv, argv[i++])) rc = -1;
 345   }
 346   *argpos_inout = i;
 347   return (rc);
 348 }
 349
 350 /* --- @tvec_main@ --- *
 351  *
 352  * Arguments:   @int argc@ = number of command-line arguments
 353  *              @char *argv[]@ = vector of argument strings
 354  *              @const struct tvec_config *cofig@ = test vector configuration
 355  *              @const char *dflt@ = default filename or null
 356  *
 357  * Returns:     Exit code.
 358  *
 359  * Use:         All-in-one test vector front-end.  Parse options from the
 360  *              command-line as for @tvec_parseargs@, and then process the
 361  *              remaining positional arguments as for @tvec_readargs@.  The
 362  *              function constructs and disposes of a test vector state.
 363  */
 364
 365 int tvec_main(int argc, char *argv[],
 366               const struct tvec_config *config, const char *dflt)
 367 {
 368   struct tvec_state tv;
 369   int argpos;
 370
 371   tvec_parseargs(argc, argv, &tv, &argpos, config);
 372   tvec_readargs(argc, argv, &tv, &argpos, dflt);
 373   return (tvec_end(&tv));
 374 }
 375
 376 /*----- That's all, folks -------------------------------------------------*/