command_parser.c

#include "lib/command_parser.h"
#include "mem/vmm.h"
 
void command_parser_new(command_parser_t* parser, const char* _s) {
    if(!parser) {
        return;
    }
 
    parser->original_string = kcalloc(strlen(_s) + 1, 1);
    memcpy(parser->original_string, _s, strlen(_s));
 
    parser->argc = 0;
 
 
    char* ptr = parser->original_string;
    // Count arguments
    while(*ptr++ == ' ')
        ;
    while(*ptr++) {
        if(*ptr == ' ' || *ptr == 0) {
            if(parser->original_string != ptr - 1) {
                parser->argc++;
            }
 
            while(*ptr++ == ' ')
                ;
            ptr--;
        }
    }
 
    
    parser->argv = kcalloc(parser->argc, sizeof(char*));
    
    char* prev = parser->original_string;
    ptr = prev;
 
    size_t cur = 0;
 
    // Parse
    while(*ptr++ == ' ')
        ;
 
    prev = ptr - 1;
    while(*ptr++) {
        if(*ptr == ' ' || *ptr == 0) {
            size_t len = ptr - prev;
 
            parser->argv[cur] = kcalloc(len + 1, 1);
 
            memcpy(parser->argv[cur], prev, len);
 
            cur++;
 
            while(*ptr++ == ' ')
                ;
 
            prev = --ptr;
        }
    }
}
 
void command_parser_destroy(command_parser_t* parser) {
    kfree(parser->original_string);
 
    for(int i = 0; i < parser->argc; i++) {
        kfree(parser->argv[i]);
    }
 
    kfree(parser->argv);
}