A simple C string parser for CLI programs

skyParser.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>


#define BUFFER 1024


void prompt_keyboard(char *const buffer)
{
	printf("|: ");
	fflush(stdout);
	strncpy(buffer, "", BUFFER);
	fgets(buffer, BUFFER, stdin);
}

void free_args(char **args, int16_t *const nbArgs)
{
	for(uint16_t i = 0; i < *nbArgs; i++)
	{
		free(args[i]);
		args[i] = NULL;
	}

	*nbArgs = 0;
}

void parse_command(char *const buffer, char **const args, int16_t *const nbArgs)
{
	size_t size = 0;
	char *ptr = NULL;

	uint16_t i = 0;
	const size_t length = strlen(buffer);

	// Remove the new line character (mandatory with 'fgets()')
	if(buffer[length - 1] == '\n')
	{
		buffer[length - 1] = '\0';
	}
	
	while(i < length)
	{
		while(buffer[i] == ' ' || buffer[i] == '\t' || buffer[i] == '\0')
		{
			if(++i >= length)
			{
				break;
			}
		}

		if(i >= length)
		{
			break;
		}

		/*
		if(buffer[i] == '#')
		{
			// Here you can do some operations if this special character is present, or directly go downside.
			// As you want !
		}
		*/

		// Do some magic here !
		ptr = strstr(buffer + i, " ");
		size = strlen(buffer + i) - (ptr != NULL ? strlen(ptr) : 0);
		args[*nbArgs] = strndup(buffer + i, size);

		(*nbArgs)++;
		i += size + 1;
	}
}

void print_args(char *const *const args, const int16_t nbArgs)
{
	for(uint16_t i = 0; i < nbArgs; i++)
	{
		printf("\narg[%d]: %s", i, args[i]);
	}

	printf("\n\n");
}



int main(int argc, char const *argv[])
{
	(void)argc;
	(void)argv;

	char buffer[BUFFER];

	char *args[BUFFER];
	int16_t nbArgs = -1;

	while(1)
	{
		prompt_keyboard(buffer);
		free_args(args, &nbArgs);
		parse_command(buffer, args, &nbArgs);
		print_args(args, nbArgs);
	}

	return 0;
}