setupflags.c

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#include <setupflags.h>
#include <string.h>
#include <stdlib.h>
 
void setupflags(char *flagdef, char *flaguse, uint32_t *flagusemask,
        uint32_t *required, int *status) {
    int32_t BITS[32] = {0x00000001, 0x00000002, 0x00000004, 0x00000008,
        0x00000010, 0x00000020, 0x00000040, 0x00000080,
        0x00000100, 0x00000200, 0x00000400, 0x00000800,
        0x00001000, 0x00002000, 0x00004000, 0x00008000,
        0x00010000, 0x00020000, 0x00040000, 0x00080000,
        0x00100000, 0x00200000, 0x00400000, 0x00800000,
        0x01000000, 0x02000000, 0x04000000, 0x08000000,
        0x10000000, 0x20000000, 0x40000000, 0x80000000};
 
    int bitNum;
    char *tmpFlags;
    char *ptr, *ptr2;
 
    *status = 0;
    *flagusemask = 0;
    *required = 0;
 
    bitNum = 0;
    tmpFlags = strdup(flagdef);
    ptr = strtok(tmpFlags, ",");
    while (ptr) {
        if (ptr) {
            if ((ptr2 = strstr(flaguse, ptr))) {
                ptr2--;
                if (*ptr2 == '~')
                    *required = *required | BITS[bitNum];
                else
                    *flagusemask = *flagusemask | BITS[bitNum];
            }
        }
        ptr = strtok(NULL, ",");
        bitNum++;
        if (bitNum > 33) {
            *status = -1;
            break;
        }
    }
 
    free(tmpFlags);
}