+/* -*-c-*-
+ *
+ * $Id: unihash-mkstatic.c,v 1.1 2003/12/15 20:52:56 mdw Exp $
+ *
+ * Build static universal hash tables
+ *
+ * (c) 2003 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of the mLib utilities library.
+ *
+ * mLib is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * mLib is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with mLib; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: unihash-mkstatic.c,v $
+ * Revision 1.1 2003/12/15 20:52:56 mdw
+ * New program to make fixed tables for universal hashing.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "macros.h"
+#include "mdwopt.h"
+#include "quis.h"
+#include "report.h"
+#include "unihash.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+#define BSCOL 72
+
+static unsigned long getint(const char *p, unsigned long max,
+ const char *what)
+{
+ char *pp;
+ unsigned long x = strtoul(p, &pp, 0);
+ if (*pp || (max && x > max))
+ die(EXIT_FAILURE, "bad %s `%s'", what, p);
+ return (x);
+}
+
+static void version(FILE *fp)
+{
+ pquis(fp, "$, mLib version " VERSION "\n");
+}
+
+static void usage(FILE *fp)
+{
+ pquis(fp, "Usage: $ [-c] [-o FILE] [-g GUARD] [-i HEADER] [-s SYM]\n\
+ [-k KEY]\n");
+}
+
+static void help(FILE *fp)
+{
+ version(fp);
+ putc('\n', stdout);
+ usage(fp);
+ fputs("\n\
+Emits a precomputed unihash_info structure for a given key.\n\
+\n\
+-h, --help Show this help text.\n\
+-v, --version Show the program's version number.\n\
+-u, --usage Show a terse usage message.\n\
+\n\
+-c, --c-source Emit a C source file rather than a header.\n\
+-k, --key=KEY Use KEY as the universal hashing key.\n\
+-g, --guard=GUARD Use GUARD as a multiple-inclusion guard constant.\n\
+-i, --include=HEADER Include HEADER at top of C source file.\n\
+-s, --symbol=SYM Name the generated table SYM.\n\
+-o, --output=FILE Write the output to FILE.\n\
+", stdout);
+}
+
+int main(int argc, char *argv[])
+{
+ uint32 key = 0xe07e5bd1;
+ unsigned flags = 0;
+ const char *sym = 0;
+ const char *inc = 0;
+ const char *guard = 0;
+ const char *file = 0;
+ FILE *fp;
+ unihash_info u;
+ int i, j, k;
+
+#define f_bogus 1u
+#define f_ctab 2u
+
+ ego(argv[0]);
+
+ for (;;) {
+ static struct option opts[] = {
+ { "help", 0, 0, 'h' },
+ { "version", 0, 0, 'v' },
+ { "usage", 0, 0, 'u' },
+
+ { "output", OPTF_ARGREQ, 0, 'o' },
+ { "c-source", 0, 0, 'c' },
+ { "key", OPTF_ARGREQ, 0, 'k' },
+ { "symbol", OPTF_ARGREQ, 0, 's' },
+ { "include", OPTF_ARGREQ, 0, 'i' },
+ { "guard", OPTF_ARGREQ, 0, 'g' },
+
+ { 0, 0, 0, 0 }
+ };
+ int i = mdwopt(argc, argv, "hvu o:ck:s:i:g:", opts, 0, 0, 0);
+
+ if (i < 0)
+ break;
+ switch (i) {
+ case 'h':
+ help(stdout);
+ exit(0);
+ case 'v':
+ version(stdout);
+ exit(0);
+ case 'u':
+ usage(stdout);
+ exit(0);
+
+ case 'o':
+ file = optarg;
+ break;
+ case 'c':
+ flags |= f_ctab;
+ break;
+ case 's':
+ sym = optarg;
+ break;
+ case 'i':
+ inc = optarg;
+ break;
+ case 'g':
+ guard = optarg;
+ break;
+ case 'k':
+ key = getint(optarg, 0xffffffff, "key");
+ break;
+
+ default:
+ flags |= f_bogus;
+ break;
+ }
+ }
+ if ((flags & f_bogus) || optind != argc) {
+ usage(stderr);
+ exit(EXIT_FAILURE);
+ }
+
+ /* --- Sort stuff out --- */
+
+ unihash_setkey(&u, key);
+ if (!sym)
+ sym = (flags & f_ctab) ? "uhi" : "UHI_INIT";
+
+ /* --- Start output --- */
+
+ if (!file)
+ fp = stdout;
+ else {
+ if (!(flags & f_ctab) && !guard) {
+ char *p;
+ const char *q;
+ if ((p = malloc(strlen(file) + 1)) == 0)
+ die(EXIT_FAILURE, "not enough memory");
+ guard = p;
+ for (q = file; *q; p++, q++) {
+ if (isalnum((unsigned char)*q))
+ *p = toupper((unsigned char)*q);
+ else
+ *p = '_';
+ }
+ *p++ = 0;
+ }
+ if ((fp = fopen(file, "w")) == 0)
+ die(EXIT_FAILURE, "couldn't write `%s': %s", file, strerror(errno));
+ }
+
+ /* --- Dump out the first chunk of the file --- */
+
+ fprintf(fp, "\
+/* -*-c-*-\n\
+ *\n\
+ * Unihash table (key = %08lx) [generated]\n\
+ */\n\
+\n",
+ (unsigned long)key);
+
+ if (flags & f_ctab) {
+ if (inc)
+ fprintf(fp, "#include \"%s\"\n\n", inc);
+ else
+ fputs("#include <mLib/unihash.h>\n\n", fp);
+ fprintf(fp, "unihash_info %s = { {\n", sym);
+ } else {
+ int n;
+ if (guard)
+ fprintf(fp, "#ifndef %s\n#define %s\n\n", guard, guard);
+ n = fprintf(fp, "#define %s { {", sym);
+ while (n < BSCOL) {
+ fputc('\t', fp);
+ n = (n + 8) & ~7;
+ }
+ fputc('\n', fp);
+ }
+
+ /* --- Main output --- */
+
+ for (i = 0; i < N(u.s); i++) {
+ fputs(" {", fp);
+ for (j = 0; j < N(u.s[i]); j++) {
+ fputs(" {", fp);
+ for (k = 0; k < N(u.s[i][j]); k++) {
+ fprintf(fp, " 0x%08lx", (unsigned long)u.s[i][j][k]);
+ if (k < N(u.s[i][j]) - 1) {
+ fputc(',', fp);
+ if (k % 4 == 3)
+ fputs(flags & f_ctab ? "\n " : "\t\t\t\\\n ", fp);
+ }
+ }
+ if (j < N(u.s[i]) - 1) {
+ fputs(flags & f_ctab ? " },\n\n " :
+ " },\t\t\t\\\n\t\t\t\t\t\t\t\t\t\\\n ", fp);
+ }
+ }
+ if (i < N(u.s) - 1) {
+ fputs(flags & f_ctab ? " } },\n\n" :
+ " } },\t\t\\\n\t\t\t\t\t\t\t\t\t\\\n", fp);
+ }
+ }
+
+ /* --- Done --- */
+
+ fputs(flags & f_ctab ? " } }\n} };\n" :
+ " } }\t\t\\\n} }\n", fp);
+ if (!(flags & f_ctab) && guard)
+ fputs("\n#endif\n", fp);
+
+ return (0);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
~mdw / mLib / commitdiff