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Diffstat (limited to 'libshouldbeinlibc/argp-ex4.c')
| -rw-r--r-- | libshouldbeinlibc/argp-ex4.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/libshouldbeinlibc/argp-ex4.c b/libshouldbeinlibc/argp-ex4.c deleted file mode 100644 index cbb08b4b..00000000 --- a/libshouldbeinlibc/argp-ex4.c +++ /dev/null @@ -1,146 +0,0 @@ -/* Argp example #4 -- a program with somewhat more complicated options */ - -/* This program uses the same features as example 3, but has more options, - and somewhat more structure in the -help output. It also shows how you - can `steal' the remainder of the input arguments past a certain point, for - programs that accept a list of items. It also shows the special argp KEY - value ARGP_KEY_NO_ARGS, which is only given if no non-option arguments - were supplied to the program. - - For structuring the help output, two features are used, *headers* which - are entries in the options vector with the first four fields being zero, - and a two part documentation string (in the variable DOC), which allows - documentation both before and after the options; the two parts of DOC are - separated by a vertical-tab character ('\v', or '\013'). By convention, - the documentation before the options is just a short string saying what - the program does, and that afterwards is longer, describing the behavior - in more detail. All documentation strings are automatically filled for - output, although newlines may be included to force a line break at a - particular point. All documenation strings are also passed to the - `gettext' function, for possible translation into the current locale. */ - -#include <stdlib.h> -#include <error.h> -#include <argp.h> - -const char *argp_program_version = "argp-ex4 1.0"; -const char *argp_program_bug_address = "<bug-gnu-utils@prep.ai.mit.edu>"; - -static char doc[] = - "Argp example #4 -- a program with somewhat more complicated options\ -\vThis part of the documentation comes *after* the options; note that\ - it is automatically filled, but it's possible to force a line-break,\ - e.g.\n<-- here."; -static char args_doc[] = "ARG1 [STRING...]"; - -/* Keys for options without short-options. */ -#define OPT_ABORT 1 /* --abort */ - -static struct argp_option options[] = { - {"verbose", 'v', 0, 0, "Produce verbose output" }, - {"quiet", 'q', 0, 0, "Don't produce any output" }, - {"silent", 's', 0, OPTION_ALIAS }, - {"output", 'o', "FILE", 0, "Output to FILE instead of standard output" }, - - {0, 0, 0, 0, "The following options should be grouped together:" }, - {"repeat", 'r', "COUNT", OPTION_ARG_OPTIONAL, - "Repeat the output COUNT (default 10) times"}, - {"abort", OPT_ABORT, 0, 0, "Abort before showing any output"}, - { 0 } -}; - -/* Used by main to communicate with parse_opt. */ -struct arguments -{ - char *arg1; /* ARG1 */ - char **strings; /* [STRING...] */ - int silent, verbose, abort; /* -s, -v, --abort */ - char *output_file; /* --output=FILE */ - int repeat_count; /* --repeat[=COUNT] */ -}; - -static error_t -parse_opt (int key, char *arg, struct argp_state *state) -{ - /* Get the INPUT argument from argp_parse, which we know is a pointer to - our arguments structure. */ - struct arguments *arguments = state->input; - - switch (key) - { - case 'q': case 's': - arguments->silent = 1; - break; - case 'v': - arguments->verbose = 1; - break; - case 'o': - arguments->output_file = arg; - break; - case 'r': - arguments->repeat_count = arg ? atoi (arg) : 10; - break; - case OPT_ABORT: - arguments->abort = 1; - break; - - case ARGP_KEY_NO_ARGS: - argp_usage (state); - - case ARGP_KEY_ARG: - /* Here we know that STATE->arg_num == 0, since we force argument - parsing to end before any more arguments can get here. */ - arguments->arg1 = arg; - - /* Now we consume all the rest of the arguments. STATE->next is the - index in STATE->argv of the next argument to be parsed, which is the - first STRING we're interested in, so we can just use - `&state->argv[state->next]' as the value for arguments->strings. - - IN ADDITION, by setting STATE->next to the end of the arguments, we - can force argp to stop parsing here and return. */ - arguments->strings = &state->argv[state->next]; - state->next = state->argc; - - break; - - default: - return ARGP_ERR_UNKNOWN; - } - return 0; -} - -static struct argp argp = { options, parse_opt, args_doc, doc }; - -int main (int argc, char **argv) -{ - int i, j; - struct arguments arguments; - - /* Default values. */ - arguments.silent = 0; - arguments.verbose = 0; - arguments.output_file = "-"; - arguments.repeat_count = 1; - arguments.abort = 0; - - argp_parse (&argp, argc, argv, 0, 0, &arguments); - - if (arguments.abort) - error (10, 0, "ABORTED"); - - for (i = 0; i < arguments.repeat_count; i++) - { - printf ("ARG1 = %s\n", arguments.arg1); - printf ("STRINGS = "); - for (j = 0; arguments.strings[j]; j++) - printf (j == 0 ? "%s" : ", %s", arguments.strings[j]); - printf ("\n"); - printf ("OUTPUT_FILE = %s\nVERBOSE = %s\nSILENT = %s\n", - arguments.output_file, - arguments.verbose ? "yes" : "no", - arguments.silent ? "yes" : "no"); - } - - exit (0); -} |