cc6b86e175
Glibc provides the argp_parse() function for parsing command line arguments [1]. Indicate that argc/argv are read from and arg_index is written to. Strictly speaking, we also need to indicate that argp is read from, but this would require describing its layout, and most people use a static initializer there, so it's not worth the effort. [1] https://www.gnu.org/software/libc/manual/html_node/Argp.html Reviewed By: vitalybuka Differential Revision: https://reviews.llvm.org/D143330
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
// RUN: %clang %s -o %t && %run %t -o baz
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// argp_parse is glibc specific.
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// UNSUPPORTED: android, target={{.*(freebsd|netbsd).*}}
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#include <argp.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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struct test {
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const char *option_value;
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};
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static const struct argp_option options[] = {
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{"option", 'o', "OPTION", 0, "Option", 0},
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{NULL, 0, NULL, 0, NULL, 0},
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};
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static error_t parser(int key, char *arg, struct argp_state *state) {
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if (key == 'o') {
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((struct test *)(state->input))->option_value = arg;
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return 0;
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}
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return ARGP_ERR_UNKNOWN;
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}
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static struct argp argp = {.options = options, .parser = parser};
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void test_nulls(char *argv0) {
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char *argv[] = {argv0, NULL};
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int res = argp_parse(NULL, 1, argv, 0, NULL, NULL);
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assert(res == 0);
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}
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void test_synthetic(char *argv0) {
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char *argv[] = {argv0, "-o", "foo", "bar", NULL};
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struct test t = {NULL};
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int arg_index;
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int res = argp_parse(&argp, 4, argv, 0, &arg_index, &t);
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assert(res == 0);
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assert(arg_index == 3);
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assert(strcmp(t.option_value, "foo") == 0);
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}
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void test_real(int argc, char **argv) {
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struct test t = {NULL};
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int arg_index;
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int res = argp_parse(&argp, argc, argv, 0, &arg_index, &t);
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assert(res == 0);
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assert(arg_index == 3);
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assert(strcmp(t.option_value, "baz") == 0);
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}
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int main(int argc, char **argv) {
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test_nulls(argv[0]);
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test_synthetic(argv[0]);
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test_real(argc, argv);
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return EXIT_SUCCESS;
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}
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