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str(1): edit out goto

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dtb 2024-07-19 19:03:23 -06:00
parent 71f4a411b6
commit c8b4f7a8b3
Signed by: trinity
GPG Key ID: 34C0543BBB6AF81B
1 changed files with 27 additions and 27 deletions
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54
src/str.c
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@ -20,11 +20,11 @@
#include <ctype.h> #include <ctype.h>
#include <stddef.h> /* NULL */ #include <stddef.h> /* NULL */
#include <stdio.h> /* fprintf(3) */ #include <stdio.h> /* fprintf(3) */
#include <stdlib.h> /* EXIT_FAILURE */ #include <stdlib.h> /* size_t, EXIT_FAILURE */
#include <string.h> /* strcmp(3) */ #include <string.h> /* strcmp(3) */
#include <sysexits.h> #include <sysexits.h> /* EX_USAGE */
static char *program_name = "str"; char *program_name = "str";
static struct { static struct {
char *name; char *name;
@ -41,41 +41,41 @@ static struct {
{ "isprint", isprint }, { "isprint", isprint },
{ "ispunct", ispunct }, { "ispunct", ispunct },
{ "isspace", isspace }, { "isspace", isspace },
{ "isupper", isupper } { "isupper", isupper },
{ NULL, NULL } /* marks end */
}; };
int usage(char *s){
fprintf(stderr, "Usage: %s type string...\n", s);
return EX_USAGE;
}
int main(int argc, char *argv[]){ int main(int argc, char *argv[]){
int ctype; size_t ctype; /* selected from ctypes.h; index of ctype */
int i; int retval;
int r;
if (argc >= 3) { if (argc < 3) { return usage(argv[0] == NULL ? program_name : argv[0]); }
for (ctype = 0; ctype < (sizeof ctypes) / (sizeof *ctypes); ++ctype) {
if(strcmp(argv[1], ctypes[ctype].name) == 0) {
goto pass;
}
}
}
fprintf( for ( /* iterate ctypes */
stderr, ctype = 0;
"Usage: %s type string...\n", ctypes[ctype].f != NULL /* break at the end of ctypes */
argv[0] == NULL ? program_name : argv[0] && strcmp(argv[1], ctypes[ctype].name) != 0; /* break at match */
++ctype
); );
return EX_USAGE; if (ctypes[ctype].f == NULL) { return usage(argv[0]); }
pass: for (argv += 2, r = 1; *argv != NULL; ++argv) { /* iterate args */
for (i = 0; argv[0][i] != '\0'; ++i) { for (argv += 2, retval = EXIT_FAILURE; *argv != NULL; ++argv) {
/* First checks if argv[0][i] is valid ASCII; ctypes(3) for (size_t i = 0; argv[0][i] != '\0'; ++i) { /* iterate arg bytes */
* don't handle non-ASCII. /* First checks if argv[0][i] is valid ASCII; ctypes(3) don't
* This is bad. */ * handle non-ASCII. This is bad. */
if( if(
(unsigned char)argv[0][i] < 0x80 && !ctypes[ctype].f(argv[0][i]) (unsigned char)argv[0][i] < 0x80 && !ctypes[ctype].f(argv[0][i])
) { return 1; } ) { return EXIT_FAILURE; }
else { r = 0; } else { retval = EXIT_SUCCESS; }
} }
} }
return r; return retval;
} }