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-rw-r--r--third_party/heimdal/lib/sl/sl.c499
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diff --git a/third_party/heimdal/lib/sl/sl.c b/third_party/heimdal/lib/sl/sl.c
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+/*
+ * Copyright (c) 1995 - 2006 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include "sl_locl.h"
+#include <setjmp.h>
+
+static void
+mandoc_template(SL_cmd *cmds,
+ const char *extra_string)
+{
+ SL_cmd *c, *prev;
+ char timestr[64], cmd[64];
+ const char *p;
+ time_t t;
+
+ printf(".\\\" Things to fix:\n");
+ printf(".\\\" * correct section, and operating system\n");
+ printf(".\\\" * remove Op from mandatory flags\n");
+ printf(".\\\" * use better macros for arguments (like .Pa for files)\n");
+ printf(".\\\"\n");
+ t = time(NULL);
+ strftime(timestr, sizeof(timestr), "%b %d, %Y", localtime(&t));
+ printf(".Dd %s\n", timestr);
+#ifdef HAVE_GETPROGNAME
+ p = getprogname();
+#else
+ p = "unknown-application";
+#endif
+ strncpy(cmd, p, sizeof(cmd));
+ cmd[sizeof(cmd)-1] = '\0';
+ strupr(cmd);
+
+ printf(".Dt %s SECTION\n", cmd);
+ printf(".Os OPERATING_SYSTEM\n");
+ printf(".Sh NAME\n");
+ printf(".Nm %s\n", p);
+ printf(".Nd\n");
+ printf("in search of a description\n");
+ printf(".Sh SYNOPSIS\n");
+ printf(".Nm\n");
+ for(c = cmds; c->name; ++c) {
+/* if (c->func == NULL)
+ continue; */
+ printf(".Op Fl %s", c->name);
+ printf("\n");
+
+ }
+ if (extra_string && *extra_string)
+ printf (".Ar %s\n", extra_string);
+ printf(".Sh DESCRIPTION\n");
+ printf("Supported options:\n");
+ printf(".Bl -tag -width Ds\n");
+ prev = NULL;
+ for(c = cmds; c->name; ++c) {
+ if (c->func) {
+ if (prev)
+ printf ("\n%s\n", prev->usage);
+
+ printf (".It Fl %s", c->name);
+ prev = c;
+ } else
+ printf (", %s\n", c->name);
+ }
+ if (prev)
+ printf ("\n%s\n", prev->usage);
+
+ printf(".El\n");
+ printf(".\\\".Sh ENVIRONMENT\n");
+ printf(".\\\".Sh FILES\n");
+ printf(".\\\".Sh EXAMPLES\n");
+ printf(".\\\".Sh DIAGNOSTICS\n");
+ printf(".\\\".Sh SEE ALSO\n");
+ printf(".\\\".Sh STANDARDS\n");
+ printf(".\\\".Sh HISTORY\n");
+ printf(".\\\".Sh AUTHORS\n");
+ printf(".\\\".Sh BUGS\n");
+}
+
+SL_cmd *
+sl_match (SL_cmd *cmds, char *cmd, int exactp)
+{
+ SL_cmd *c, *current = NULL, *partial_cmd = NULL;
+ int partial_match = 0;
+
+ for (c = cmds; c->name; ++c) {
+ if (c->func)
+ current = c;
+ if (strcmp (cmd, c->name) == 0)
+ return current;
+ else if (strncmp (cmd, c->name, strlen(cmd)) == 0 &&
+ partial_cmd != current) {
+ ++partial_match;
+ partial_cmd = current;
+ }
+ }
+ if (partial_match == 1 && !exactp)
+ return partial_cmd;
+ else
+ return NULL;
+}
+
+void
+sl_help (SL_cmd *cmds, int argc, char **argv)
+{
+ SL_cmd *c, *prev_c;
+
+ if (getenv("SLMANDOC")) {
+ mandoc_template(cmds, NULL);
+ return;
+ }
+
+ if (argc == 1) {
+ prev_c = NULL;
+ for (c = cmds; c->name; ++c) {
+ if (c->func) {
+ if(prev_c)
+ printf ("\n\t%s%s", prev_c->usage ? prev_c->usage : "",
+ prev_c->usage ? "\n" : "");
+ prev_c = c;
+ printf ("%s", c->name);
+ } else
+ printf (", %s", c->name);
+ }
+ if(prev_c)
+ printf ("\n\t%s%s", prev_c->usage ? prev_c->usage : "",
+ prev_c->usage ? "\n" : "");
+ } else {
+ c = sl_match (cmds, argv[1], 0);
+ if (c == NULL)
+ printf ("No such command: %s. "
+ "Try \"help\" for a list of all commands\n",
+ argv[1]);
+ else {
+ printf ("%s\t%s\n", c->name, c->usage);
+ if(c->help && *c->help)
+ printf ("%s\n", c->help);
+ if((++c)->name && c->func == NULL) {
+ printf ("Synonyms:");
+ while (c->name && c->func == NULL)
+ printf ("\t%s", (c++)->name);
+ printf ("\n");
+ }
+ }
+ }
+}
+
+#ifdef HAVE_READLINE
+
+char *readline(char *prompt);
+void add_history(char *p);
+
+#else
+
+static char *
+readline(char *prompt)
+{
+ char buf[BUFSIZ];
+ printf ("%s", prompt);
+ fflush (stdout);
+ if(fgets(buf, sizeof(buf), stdin) == NULL)
+ return NULL;
+ buf[strcspn(buf, "\r\n")] = '\0';
+ return strdup(buf);
+}
+
+static void
+add_history(char *p)
+{
+}
+
+#endif
+
+int
+sl_command(SL_cmd *cmds, int argc, char **argv)
+{
+ SL_cmd *c;
+ c = sl_match (cmds, argv[0], 0);
+ if (c == NULL)
+ return -1;
+ return (*c->func)(argc, argv);
+}
+
+struct sl_data {
+ int max_count;
+ char **ptr;
+};
+
+int
+sl_make_argv(char *line, int *ret_argc, char ***ret_argv)
+{
+ char *p, *begining;
+ int argc, nargv;
+ char **argv;
+ int quote = 0;
+
+ nargv = 10;
+ argv = malloc(nargv * sizeof(*argv));
+ if(argv == NULL)
+ return ENOMEM;
+ argc = 0;
+
+ p = line;
+
+ while(isspace((unsigned char)*p))
+ p++;
+ begining = p;
+
+ while (1) {
+ if (*p == '\0') {
+ ;
+ } else if (*p == '"') {
+ quote = !quote;
+ memmove(&p[0], &p[1], strlen(&p[1]) + 1);
+ continue;
+ } else if (*p == '\\') {
+ if (p[1] == '\0')
+ goto failed;
+ memmove(&p[0], &p[1], strlen(&p[1]) + 1);
+ p += 1;
+ continue;
+ } else if (quote || !isspace((unsigned char)*p)) {
+ p++;
+ continue;
+ } else
+ *p++ = '\0';
+ if (quote)
+ goto failed;
+ if(argc == nargv - 1) {
+ char **tmp;
+ nargv *= 2;
+ tmp = realloc (argv, nargv * sizeof(*argv));
+ if (tmp == NULL) {
+ free(argv);
+ return ENOMEM;
+ }
+ argv = tmp;
+ }
+ argv[argc++] = begining;
+ while(isspace((unsigned char)*p))
+ p++;
+ if (*p == '\0')
+ break;
+ begining = p;
+ }
+ argv[argc] = NULL;
+ *ret_argc = argc;
+ *ret_argv = argv;
+ return 0;
+failed:
+ free(argv);
+ return ERANGE;
+}
+
+static jmp_buf sl_jmp;
+
+static void sl_sigint(int sig)
+{
+ longjmp(sl_jmp, 1);
+}
+
+static char *sl_readline(const char *prompt)
+{
+ char *s;
+ void (*old)(int);
+ old = signal(SIGINT, sl_sigint);
+ if(setjmp(sl_jmp))
+ printf("\n");
+ s = readline(rk_UNCONST(prompt));
+ signal(SIGINT, old);
+ return s;
+}
+
+/* return values:
+ * 0 on success,
+ * -1 on fatal error,
+ * -2 if EOF, or
+ * return value of command */
+int
+sl_command_loop(SL_cmd *cmds, const char *prompt, void **data)
+{
+ int ret = 0;
+ char *buf;
+ int argc;
+ char **argv;
+
+ buf = sl_readline(prompt);
+ if(buf == NULL)
+ return -2;
+
+ if(*buf)
+ add_history(buf);
+ ret = sl_make_argv(buf, &argc, &argv);
+ if(ret) {
+ fprintf(stderr, "sl_loop: out of memory\n");
+ free(buf);
+ return -1;
+ }
+ if (argc >= 1) {
+ ret = sl_command(cmds, argc, argv);
+ if(ret == -1) {
+ sl_did_you_mean(cmds, argv[0]);
+ ret = 0;
+ }
+ }
+ free(buf);
+ free(argv);
+ return ret;
+}
+
+int
+sl_loop(SL_cmd *cmds, const char *prompt)
+{
+ void *data = NULL;
+ int ret;
+ while((ret = sl_command_loop(cmds, prompt, &data)) >= 0)
+ ;
+ return ret;
+}
+
+void
+sl_apropos (SL_cmd *cmd, const char *topic)
+{
+ for (; cmd->name != NULL; ++cmd)
+ if (cmd->usage != NULL && strstr(cmd->usage, topic) != NULL)
+ printf ("%-20s%s\n", cmd->name, cmd->usage);
+}
+
+/*
+ * Help to be used with slc.
+ */
+
+void
+sl_slc_help (SL_cmd *cmds, int argc, char **argv)
+{
+ if(argc == 0) {
+ sl_help(cmds, 1, argv - 1 /* XXX */);
+ } else {
+ SL_cmd *c = sl_match (cmds, argv[0], 0);
+ if(c == NULL) {
+ fprintf (stderr, "No such command: %s. "
+ "Try \"help\" for a list of commands\n",
+ argv[0]);
+ } else {
+ if(c->func) {
+ static char help[] = "--help";
+ char *fake[3];
+ fake[0] = argv[0];
+ fake[1] = help;
+ fake[2] = NULL;
+ (*c->func)(2, fake);
+ fprintf(stderr, "\n");
+ }
+ if(c->help && *c->help)
+ fprintf (stderr, "%s\n", c->help);
+ if((++c)->name && c->func == NULL) {
+ int f = 0;
+ fprintf (stderr, "Synonyms:");
+ while (c->name && c->func == NULL) {
+ fprintf (stderr, "%s%s", f ? ", " : " ", (c++)->name);
+ f = 1;
+ }
+ fprintf (stderr, "\n");
+ }
+ }
+ }
+}
+
+/* OptimalStringAlignmentDistance */
+
+static int
+osad(const char *s1, const char *s2)
+{
+ size_t l1 = strlen(s1), l2 = strlen(s2), i, j;
+ int *row0, *row1, *row2, *tmp, cost;
+
+ row0 = calloc(sizeof(int), l2 + 1);
+ row1 = calloc(sizeof(int), l2 + 1);
+ row2 = calloc(sizeof(int), l2 + 1);
+
+ for (j = 0; j < l2 + 1; j++)
+ row1[j] = j;
+
+ for (i = 0; i < l1; i++) {
+
+ row2[0] = i + 1;
+
+ for (j = 0; j < l2; j++) {
+
+ row2[j + 1] = row1[j] + (s1[i] != s2[j]); /* substitute */
+
+ if (row2[j + 1] > row1[j + 1] + 1) /* delete */
+ row2[j + 1] = row1[j + 1] + 1;
+ if (row2[j + 1] > row2[j] + 1) /* insert */
+ row2[j + 1] = row2[j] + 1;
+ if (j > 0 && i > 0 && s1[i - 1] != s2[j - 1] && s1[i - 1] == s2[j] && s1[i] == s2[j - 1] && row2[j + 1] < row0[j - 1]) /* transposition */
+ row2[j + 1] = row0[j - 1] + 1;
+ }
+
+ tmp = row0;
+ row0 = row1;
+ row1 = row2;
+ row2 = tmp;
+ }
+
+ cost = row1[l2];
+
+ free(row0);
+ free(row1);
+ free(row2);
+
+ return cost;
+}
+
+/**
+ * Will propose a list of command that are almost matching the command
+ * used, if there is no matching, will ask the user to use "help".
+ *
+ * @param cmds command array to use for matching
+ * @param match the command that didn't exists
+ */
+
+void
+sl_did_you_mean(SL_cmd *cmds, const char *match)
+{
+ int *metrics, best_match = INT_MAX;
+ SL_cmd *c;
+ size_t n;
+
+ for (n = 0, c = cmds; c->name; c++, n++)
+ ;
+ if (n == 0)
+ return;
+ metrics = calloc(n, sizeof(metrics[0]));
+ if (metrics == NULL)
+ return;
+
+ for (n = 0; cmds[n].name; n++) {
+ metrics[n] = osad(match, cmds[n].name);
+ if (metrics[n] < best_match)
+ best_match = metrics[n];
+ }
+ if (best_match == INT_MAX) {
+ free(metrics);
+ fprintf(stderr, "What kind of command is %s", match);
+ return;
+ }
+
+ /* if match distance is low, propose that for the user */
+ if (best_match < 7) {
+
+ fprintf(stderr, "error: %s is not a known command, did you mean ?\n", match);
+ for (n = 0; cmds[n].name; n++) {
+ if (metrics[n] == best_match) {
+ fprintf(stderr, "\t%s\n", cmds[n].name);
+ }
+ }
+ fprintf(stderr, "\n");
+
+ } else {
+
+ fprintf(stderr, "error: %s is not a command, use \"help\" for more list of commands.\n", match);
+ }
+
+ free(metrics);
+
+ return;
+}
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