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-rw-r--r--popt/popthelp.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/popt/popthelp.c b/popt/popthelp.c
new file mode 100644
index 0000000..1490c78
--- /dev/null
+++ b/popt/popthelp.c
@@ -0,0 +1,306 @@
+/*
+Copyright (c) 1998 Red Hat Software
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from the X Consortium.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#else
+# ifdef _AIX
+# pragma alloca
+# endif
+#endif
+
+#ifdef HAVE_MALLOC_H
+# include <malloc.h>
+#endif
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "popt.h"
+#include "poptint.h"
+
+#ifdef _WIN32
+#define SLASH '\\'
+#else
+#define SLASH '/'
+#endif
+
+static void displayArgs(poptContext con, enum poptCallbackReason foo,
+ struct poptOption * key,
+ const char * arg, void * data) {
+ if (key->shortName== '?')
+ poptPrintHelp(con, stdout, 0);
+ else
+ poptPrintUsage(con, stdout, 0);
+ exit(0);
+}
+
+struct poptOption poptHelpOptions[] = {
+ { NULL, '\0', POPT_ARG_CALLBACK, &displayArgs, '\0', NULL },
+ { "help", '?', 0, NULL, '?', N_("Show this help message") },
+ { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message") },
+ { NULL, '\0', 0, NULL, 0 }
+} ;
+
+static const char * getArgDescrip(const struct poptOption * opt) {
+ if (!(opt->argInfo & POPT_ARG_MASK)) return NULL;
+
+ if (opt == (poptHelpOptions + 1) || opt == (poptHelpOptions + 2))
+ if (opt->argDescrip) return POPT_(opt->argDescrip);
+
+ if (opt->argDescrip) return _(opt->argDescrip);
+ return POPT_("ARG");
+}
+
+static void singleOptionHelp(FILE * f, int maxLeftCol,
+ const struct poptOption * opt) {
+ int indentLength = maxLeftCol + 5;
+ int lineLength = 79 - indentLength;
+ const char * help = _(opt->descrip);
+ int helpLength;
+ const char * ch;
+ char * left = alloca(maxLeftCol + 1);
+ const char * argDescrip = getArgDescrip(opt);
+
+ *left = '\0';
+ if (opt->longName && opt->shortName)
+ sprintf(left, "-%c, --%s", opt->shortName, opt->longName);
+ else if (opt->shortName)
+ sprintf(left, "-%c", opt->shortName);
+ else if (opt->longName)
+ sprintf(left, "--%s", opt->longName);
+ if (!*left) return ;
+ if (argDescrip) {
+ strcat(left, "=");
+ strcat(left, argDescrip);
+ }
+
+ if (help)
+ fprintf(f," %-*s ", maxLeftCol, left);
+ else {
+ fprintf(f," %s\n", left);
+ return;
+ }
+
+ helpLength = strlen(help);
+ while (helpLength > lineLength) {
+ ch = help + lineLength - 1;
+ while (ch > help && !isspace(*ch)) ch--;
+ if (ch == help) break; /* give up */
+ while (ch > (help + 1) && isspace(*ch)) ch--;
+ ch++;
+
+ fprintf(f, "%.*s\n%*s", (int) (ch - help), help, indentLength, " ");
+
+ help = ch;
+ while (isspace(*help) && *help) help++;
+ helpLength = strlen(help);
+ }
+
+ if (helpLength) fprintf(f, "%s\n", help);
+}
+
+static int maxArgWidth(const struct poptOption * opt) {
+ int max = 0;
+ int this;
+ const char * s;
+
+ while (opt->longName || opt->shortName || opt->arg) {
+ if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
+ this = maxArgWidth(opt->arg);
+ if (this > max) max = this;
+ } else if (!(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
+ this = opt->shortName ? 2 : 0;
+ if (opt->longName) {
+ if (this) this += 2;
+ this += strlen(opt->longName) + 2;
+ }
+
+ s = getArgDescrip(opt);
+ if (s)
+ this += strlen(s) + 1;
+ if (this > max) max = this;
+ }
+
+ opt++;
+ }
+
+ return max;
+}
+
+static void singleTableHelp(FILE * f, const struct poptOption * table,
+ int left) {
+ const struct poptOption * opt;
+
+ opt = table;
+ while (opt->longName || opt->shortName || opt->arg) {
+ if ((opt->longName || opt->shortName) &&
+ !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
+ singleOptionHelp(f, left, opt);
+ opt++;
+ }
+
+ opt = table;
+ while (opt->longName || opt->shortName || opt->arg) {
+ if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
+ if (opt->descrip)
+ fprintf(f, "\n%s\n", _(opt->descrip));
+ singleTableHelp(f, opt->arg, left);
+ }
+ opt++;
+ }
+}
+
+static int showHelpIntro(poptContext con, FILE * f) {
+ int len = 6;
+ char * fn;
+
+ fprintf(f, POPT_("Usage:"));
+ if (!(con->flags & POPT_CONTEXT_KEEP_FIRST)) {
+ fn = con->optionStack->argv[0];
+ if (strchr(fn, SLASH)) fn = strchr(fn, SLASH) + 1;
+ fprintf(f, " %s", fn);
+ len += strlen(fn) + 1;
+ }
+
+ return len;
+}
+
+void poptPrintHelp(poptContext con, FILE * f, int flags) {
+ int leftColWidth;
+
+ showHelpIntro(con, f);
+ if (con->otherHelp)
+ fprintf(f, " %s", con->otherHelp);
+ else
+ fprintf(f, " %s", POPT_("[OPTION...]"));
+
+ fprintf(f, " [LIBRARIES]\n");
+ leftColWidth = maxArgWidth(con->options);
+ singleTableHelp(f, con->options, leftColWidth);
+}
+
+static int singleOptionUsage(FILE * f, int cursor,
+ const struct poptOption * opt) {
+ int len = 3;
+ char shortStr[2];
+ const char * item = shortStr;
+ const char * argDescrip = getArgDescrip(opt);
+
+ if (opt->shortName) {
+ if (!(opt->argInfo & POPT_ARG_MASK))
+ return cursor; /* we did these already */
+ len++;
+ *shortStr = opt->shortName;
+ shortStr[1] = '\0';
+ } else if (opt->longName) {
+ len += 1 + strlen(opt->longName);
+ item = opt->longName;
+ }
+
+ if (len == 3) return cursor;
+
+ if (argDescrip)
+ len += strlen(argDescrip) + 1;
+
+ if ((cursor + len) > 79) {
+ fprintf(f, "\n ");
+ cursor = 7;
+ }
+
+ fprintf(f, " [-%s%s%s%s]", opt->shortName ? "" : "-", item,
+ argDescrip ? (opt->shortName ? " " : "=") : "",
+ argDescrip ? argDescrip : "");
+
+ return cursor + len + 1;
+}
+
+int singleTableUsage(FILE * f, int cursor, const struct poptOption * table) {
+ const struct poptOption * opt;
+
+ opt = table;
+ while (opt->longName || opt->shortName || opt->arg) {
+ if ((opt->longName || opt->shortName) &&
+ !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
+ cursor = singleOptionUsage(f, cursor, opt);
+ else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE)
+ cursor = singleTableUsage(f, cursor, opt->arg);
+ opt++;
+ }
+
+ return cursor;
+}
+
+static int showShortOptions(const struct poptOption * opt, FILE * f,
+ char * str) {
+ char s[300]; /* this is larger then the ascii set, so
+ it should do just fine */
+
+ if (!str) {
+ str = s;
+ memset(str, 0, sizeof(str));
+ }
+
+ while (opt->longName || opt->shortName || opt->arg) {
+ if (opt->shortName && !(opt->argInfo & POPT_ARG_MASK))
+ str[strlen(str)] = opt->shortName;
+ else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE)
+ showShortOptions(opt->arg, f, str);
+
+ opt++;
+ }
+
+ if (s != str || !*s)
+ return 0;
+
+ fprintf(f, " [-%s]", s);
+ return strlen(s) + 4;
+}
+
+void poptPrintUsage(poptContext con, FILE * f, int flags) {
+ int cursor;
+
+ cursor = showHelpIntro(con, f);
+ cursor += showShortOptions(con->options, f, NULL);
+ singleTableUsage(f, cursor, con->options);
+
+ if (con->otherHelp) {
+ cursor += strlen(con->otherHelp) + 1;
+ if (cursor > 79) fprintf(f, "\n ");
+ fprintf(f, " %s", con->otherHelp);
+ }
+ fprintf(f, "\n [LIBRARIES]\n");
+}
+
+void poptSetOtherOptionHelp(poptContext con, const char * text) {
+ if (con->otherHelp) free(con->otherHelp);
+ con->otherHelp = strdup(text);
+}
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