ReactOS 0.4.15-dev-7918-g2a2556c
Functions | Variables
getopt.c File Reference
#include <stdio.h>
#include <string.h>
Include dependency graph for getopt.c:

Go to the source code of this file.

Functions

int getopt (int argc, char *const argv[], const char *optstring)
 

Variables

char * optarg
 
int optind = 1
 
int opterr = 1
 
int optopt
 
static int subopt
 
static int suboptind = 1
 

Function Documentation

◆ getopt()

int getopt ( int  argc,
char *const  argv[],
const char *  optstring 
)

Definition at line 20 of file getopt.c.

21{
22 char *curopt;
23 char *p;
24 int cursubopt;
25
26 if (suboptind == optind-1 && argv[suboptind][subopt] != '\0') {
27 curopt = (char *)argv[suboptind];
28 } else {
29 curopt = (char *)argv[optind];
30 if (curopt == NULL || curopt[0] != '-' || strcmp(curopt, "-") == 0)
31 return -1;
32 suboptind = optind;
33 subopt = 1;
34 optind++;
35 if (strcmp(curopt, "--") == 0)
36 return -1;
37 }
38 cursubopt = subopt++;
39 if ((p = strchr(optstring, curopt[cursubopt])) == NULL) {
40 optopt = curopt[cursubopt];
41 if (opterr)
42 fprintf(stderr, "%s: illegal option -- %c\n", argv[0], optopt);
43 return '?';
44 }
45 if (p[1] == ':') {
46 if (curopt[cursubopt+1] != '\0') {
47 optarg = curopt+cursubopt+1;
48 suboptind++;
49 return p[0];
50 }
51 if (argv[optind] == NULL) {
52 optopt = p[0];
53 if (opterr)
54 fprintf(stderr, "%s: option requires an argument -- %c\n", argv[0], optopt);
55 if (*optstring == ':')
56 return ':';
57 return '?';
58 }
59 optarg = argv[optind++];
60 }
61 return p[0];
62}
strcmp
int strcmp(const char *String1, const char *String2)
Definition: utclib.c:469
strchr
char * strchr(const char *String, int ch)
Definition: utclib.c:501
optopt
int optopt
Definition: getopt.c:48
optarg
const char * optarg
Definition: getopt.c:49
optind
int optind
Definition: getopt.c:47
opterr
int opterr
Definition: getopt.c:46
NULL
#define NULL
Definition: types.h:112
p
GLfloat GLfloat p
Definition: glext.h:8902
stderr
#define stderr
Definition: stdio.h:100
fprintf
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
subopt
static int subopt
Definition: getopt.c:17
suboptind
static int suboptind
Definition: getopt.c:18
argv
#define argv
Definition: mplay32.c:18

Referenced by main().

Variable Documentation

◆ optarg

char* optarg

Definition at line 13 of file getopt.c.

◆ opterr

int opterr = 1

Definition at line 15 of file getopt.c.

◆ optind

int optind = 1

Definition at line 14 of file getopt.c.

◆ optopt

int optopt

Definition at line 16 of file getopt.c.

◆ subopt

int subopt
static

Definition at line 17 of file getopt.c.

Referenced by getopt().

◆ suboptind

int suboptind = 1
static

Definition at line 18 of file getopt.c.

Referenced by getopt().