X-Git-Url: https://git.cworth.org/git?p=notmuch;a=blobdiff_plain;f=command-line-arguments.c;h=5dea8281b79e389fac4586a9f654a32633fa8f86;hp=ee8be18942d09407b7814bc838153ccbe3e3c53e;hb=HEAD;hpb=e70494785541c32989b5c31360e1d9ac57e106ee

diff --git a/command-line-arguments.c b/command-line-arguments.c
index ee8be189..5dea8281 100644
--- a/command-line-arguments.c
+++ b/command-line-arguments.c
@@ -4,105 +4,145 @@
 #include "error_util.h"
 #include "command-line-arguments.h"
 
-/*
-  Search the array of keywords for a given argument, assigning the
-  output variable to the corresponding value.  Return FALSE if nothing
-  matches.
-*/
+typedef enum {
+    OPT_FAILED,         /* false */
+    OPT_OK,             /* good */
+    OPT_GIVEBACK,       /* pop one of the arguments you thought you were getting off the stack */
+} opt_handled;
 
-static notmuch_bool_t
-_process_keyword_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str) {
+/*
+ * Search the array of keywords for a given argument, assigning the
+ * output variable to the corresponding value.  Return false if nothing
+ * matches.
+ */
 
-    const notmuch_keyword_t *keywords = arg_desc->keywords;
+static opt_handled
+_process_keyword_arg (const notmuch_opt_desc_t *arg_desc, char next,
+		      const char *arg_str, bool negate)
+{
+    const notmuch_keyword_t *keywords;
 
     if (next == '\0') {
 	/* No keyword given */
 	arg_str = "";
     }
 
-    while (keywords->name) {
-	if (strcmp (arg_str, keywords->name) == 0) {
-	    if (arg_desc->opt_flags)
-		*arg_desc->opt_flags |= keywords->value;
-	    else
-		*arg_desc->opt_keyword = keywords->value;
-	    return TRUE;
+    for (keywords = arg_desc->keywords; keywords->name; keywords++) {
+	if (strcmp (arg_str, keywords->name) != 0)
+	    continue;
+
+	if (arg_desc->opt_flags && negate)
+	    *arg_desc->opt_flags &= ~keywords->value;
+	else if (arg_desc->opt_flags)
+	    *arg_desc->opt_flags |= keywords->value;
+	else
+	    *arg_desc->opt_keyword = keywords->value;
+
+	return OPT_OK;
+    }
+
+    if (arg_desc->opt_keyword && arg_desc->keyword_no_arg_value && next != ':' && next != '=') {
+	for (keywords = arg_desc->keywords; keywords->name; keywords++) {
+	    if (strcmp (arg_desc->keyword_no_arg_value, keywords->name) != 0)
+		continue;
+
+	    *arg_desc->opt_keyword = keywords->value;
+	    fprintf (stderr,
+		     "Warning: No known keyword option given for \"%s\", choosing value \"%s\"."
+		     "  Please specify the argument explicitly!\n", arg_desc->name,
+		     arg_desc->keyword_no_arg_value);
+
+	    return OPT_GIVEBACK;
 	}
-	keywords++;
+	fprintf (stderr,
+		 "No matching keyword for option \"%s\" and default value \"%s\" is invalid.\n",
+		 arg_str,
+		 arg_desc->name);
+	return OPT_FAILED;
     }
+
     if (next != '\0')
-	fprintf (stderr, "Unknown keyword argument \"%s\" for option \"%s\".\n", arg_str, arg_desc->name);
+	fprintf (stderr, "Unknown keyword argument \"%s\" for option \"%s\".\n", arg_str,
+		 arg_desc->name);
     else
 	fprintf (stderr, "Option \"%s\" needs a keyword argument.\n", arg_desc->name);
-    return FALSE;
+    return OPT_FAILED;
 }
 
-static notmuch_bool_t
-_process_boolean_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str) {
-    notmuch_bool_t value;
+static opt_handled
+_process_boolean_arg (const notmuch_opt_desc_t *arg_desc, char next,
+		      const char *arg_str, bool negate)
+{
+    bool value;
 
     if (next == '\0' || strcmp (arg_str, "true") == 0) {
-	value = TRUE;
+	value = true;
     } else if (strcmp (arg_str, "false") == 0) {
-	value = FALSE;
+	value = false;
     } else {
-	fprintf (stderr, "Unknown argument \"%s\" for (boolean) option \"%s\".\n", arg_str, arg_desc->name);
-	return FALSE;
+	fprintf (stderr, "Unknown argument \"%s\" for (boolean) option \"%s\".\n", arg_str,
+		 arg_desc->name);
+	return OPT_FAILED;
     }
 
-    *arg_desc->opt_bool = value;
+    *arg_desc->opt_bool = negate ? (! value) : value;
 
-    return TRUE;
+    return OPT_OK;
 }
 
-static notmuch_bool_t
-_process_int_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str) {
+static opt_handled
+_process_int_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str)
+{
 
     char *endptr;
+
     if (next == '\0' || arg_str[0] == '\0') {
 	fprintf (stderr, "Option \"%s\" needs an integer argument.\n", arg_desc->name);
-	return FALSE;
+	return OPT_FAILED;
     }
 
     *arg_desc->opt_int = strtol (arg_str, &endptr, 10);
     if (*endptr == '\0')
-	return TRUE;
+	return OPT_OK;
 
     fprintf (stderr, "Unable to parse argument \"%s\" for option \"%s\" as an integer.\n",
 	     arg_str, arg_desc->name);
-    return FALSE;
+    return OPT_FAILED;
 }
 
-static notmuch_bool_t
-_process_string_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str) {
+static opt_handled
+_process_string_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *arg_str)
+{
 
     if (next == '\0') {
 	fprintf (stderr, "Option \"%s\" needs a string argument.\n", arg_desc->name);
-	return FALSE;
+	return OPT_FAILED;
     }
-    if (arg_str[0] == '\0') {
+    if (arg_str[0] == '\0' && ! arg_desc->allow_empty) {
 	fprintf (stderr, "String argument for option \"%s\" must be non-empty.\n", arg_desc->name);
-	return FALSE;
+	return OPT_FAILED;
     }
     *arg_desc->opt_string = arg_str;
-    return TRUE;
+    return OPT_OK;
 }
 
 /* Return number of non-NULL opt_* fields in opt_desc. */
-static int _opt_set_count (const notmuch_opt_desc_t *opt_desc)
+static int
+_opt_set_count (const notmuch_opt_desc_t *opt_desc)
 {
     return
-	!!opt_desc->opt_inherit +
-	!!opt_desc->opt_bool +
-	!!opt_desc->opt_int +
-	!!opt_desc->opt_keyword +
-	!!opt_desc->opt_flags +
-	!!opt_desc->opt_string +
-	!!opt_desc->opt_position;
+	(bool) opt_desc->opt_inherit +
+	(bool) opt_desc->opt_bool +
+	(bool) opt_desc->opt_int +
+	(bool) opt_desc->opt_keyword +
+	(bool) opt_desc->opt_flags +
+	(bool) opt_desc->opt_string +
+	(bool) opt_desc->opt_position;
 }
 
-/* Return TRUE if opt_desc is valid. */
-static notmuch_bool_t _opt_valid (const notmuch_opt_desc_t *opt_desc)
+/* Return true if opt_desc is valid. */
+static bool
+_opt_valid (const notmuch_opt_desc_t *opt_desc)
 {
     int n = _opt_set_count (opt_desc);
 
@@ -114,30 +154,34 @@ static notmuch_bool_t _opt_valid (const notmuch_opt_desc_t *opt_desc)
 }
 
 /*
-   Search for the {pos_arg_index}th position argument, return FALSE if
-   that does not exist.
-*/
+ * Search for the {pos_arg_index}th position argument, return false if
+ * that does not exist.
+ */
 
-notmuch_bool_t
+bool
 parse_position_arg (const char *arg_str, int pos_arg_index,
-		    const notmuch_opt_desc_t *arg_desc) {
+		    const notmuch_opt_desc_t *arg_desc)
+{
 
     int pos_arg_counter = 0;
+
     while (_opt_valid (arg_desc)) {
 	if (arg_desc->opt_position) {
 	    if (pos_arg_counter == pos_arg_index) {
 		*arg_desc->opt_position = arg_str;
 		if (arg_desc->present)
-		    *arg_desc->present = TRUE;
-		return TRUE;
+		    *arg_desc->present = true;
+		return true;
 	    }
 	    pos_arg_counter++;
 	}
 	arg_desc++;
     }
-    return FALSE;
+    return false;
 }
 
+#define NEGATIVE_PREFIX "no-"
+
 /*
  * Search for a non-positional (i.e. starting with --) argument matching arg,
  * parse a possible value, and assign to *output_var
@@ -146,17 +190,26 @@ parse_position_arg (const char *arg_str, int pos_arg_index,
 int
 parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_index)
 {
-    assert(argv);
+    assert (argv);
 
     const char *_arg = argv[opt_index];
 
-    assert(_arg);
-    assert(options);
+    assert (_arg);
+    assert (options);
 
     const char *arg = _arg + 2; /* _arg starts with -- */
+    const char *negative_arg = NULL;
+
+    /* See if this is a --no-argument */
+    if (strlen (arg) > strlen (NEGATIVE_PREFIX) &&
+	strncmp (arg, NEGATIVE_PREFIX, strlen (NEGATIVE_PREFIX)) == 0) {
+	negative_arg = arg + strlen (NEGATIVE_PREFIX);
+    }
+
     const notmuch_opt_desc_t *try;
 
     const char *next_arg = NULL;
+
     if (opt_index < argc - 1  && strncmp (argv[opt_index + 1], "--", 2) != 0)
 	next_arg = argv[opt_index + 1];
 
@@ -170,11 +223,22 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 	if (! try->name)
 	    continue;
 
-	if (strncmp (arg, try->name, strlen (try->name)) != 0)
+	char next;
+	const char *value;
+	bool negate = false;
+
+	if (strncmp (arg, try->name, strlen (try->name)) == 0) {
+	    next = arg[strlen (try->name)];
+	    value = arg + strlen (try->name) + 1;
+	} else if (negative_arg && (try->opt_bool || try->opt_flags) &&
+		   strncmp (negative_arg, try->name, strlen (try->name)) == 0) {
+	    next = negative_arg[strlen (try->name)];
+	    value = negative_arg + strlen (try->name) + 1;
+	    /* The argument part of --no-argument matches, negate the result. */
+	    negate = true;
+	} else {
 	    continue;
-
-	char next = arg[strlen (try->name)];
-	const char *value = arg + strlen(try->name) + 1;
+	}
 
 	/*
 	 * If we have not reached the end of the argument (i.e. the
@@ -185,17 +249,19 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 	if (next != '=' && next != ':' && next != '\0')
 	    continue;
 
-	if (next == '\0' && next_arg != NULL && ! try->opt_bool) {
+	bool lookahead = (next == '\0' && next_arg != NULL && ! try->opt_bool);
+
+	if (lookahead) {
 	    next = ' ';
 	    value = next_arg;
-	    opt_index ++;
+	    opt_index++;
 	}
 
-	notmuch_bool_t opt_status = FALSE;
+	opt_handled opt_status = OPT_FAILED;
 	if (try->opt_keyword || try->opt_flags)
-	    opt_status = _process_keyword_arg (try, next, value);
+	    opt_status = _process_keyword_arg (try, next, value, negate);
 	else if (try->opt_bool)
-	    opt_status = _process_boolean_arg (try, next, value);
+	    opt_status = _process_boolean_arg (try, next, value, negate);
 	else if (try->opt_int)
 	    opt_status = _process_int_arg (try, next, value);
 	else if (try->opt_string)
@@ -203,13 +269,16 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 	else
 	    INTERNAL_ERROR ("unknown or unhandled option \"%s\"", try->name);
 
-	if (! opt_status)
+	if (opt_status == OPT_FAILED)
 	    return -1;
 
+	if (lookahead && opt_status == OPT_GIVEBACK)
+	    opt_index--;
+
 	if (try->present)
-	    *try->present = TRUE;
+	    *try->present = true;
 
-	return opt_index+1;
+	return opt_index + 1;
     }
     return -1;
 }
@@ -217,13 +286,14 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 /* See command-line-arguments.h for description */
 int
 parse_arguments (int argc, char **argv,
-		 const notmuch_opt_desc_t *options, int opt_index) {
+		 const notmuch_opt_desc_t *options, int opt_index)
+{
 
     int pos_arg_index = 0;
-    notmuch_bool_t more_args = TRUE;
+    bool more_args = true;
 
     while (more_args && opt_index < argc) {
-	if (strncmp (argv[opt_index],"--",2) != 0) {
+	if (strncmp (argv[opt_index], "--", 2) != 0) {
 
 	    more_args = parse_position_arg (argv[opt_index], pos_arg_index, options);
 
@@ -236,12 +306,12 @@ parse_arguments (int argc, char **argv,
 	    int prev_opt_index = opt_index;
 
 	    if (strlen (argv[opt_index]) == 2)
-		return opt_index+1;
+		return opt_index + 1;
 
 	    opt_index = parse_option (argc, argv, options, opt_index);
 	    if (opt_index < 0) {
 		fprintf (stderr, "Unrecognized option: %s\n", argv[prev_opt_index]);
-		more_args = FALSE;
+		more_args = false;
 	    }
 	}
     }