141 lines
2.8 KiB
C
141 lines
2.8 KiB
C
#ifndef DEBUG
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# include <commands.h>
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# include <syscalls.h>
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#else
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# include "commands.h"
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# include <stdlib.h>
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# include <stdio.h>
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#endif
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#include <string.h>
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#include <errno.h>
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// Internal prototypes.
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extern int strtotab(int *argc, char ***argv, char const *str);
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extern void strtotab_quit(int *argc, char ***argv);
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//
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// parser_get_word()
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// Get the word at the current cursor location.
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//
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static ssize_t parser_get_word(char ***tab, size_t *tab_pos,
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char const *str, int *counter)
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{
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ssize_t i;
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i = -1;
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while (str[++i] != '\0' && str[i] != '\n' && str[i] != ' ' && str[i] != '\t');
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if (*tab != NULL){
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(*tab)[*tab_pos] = (char*)malloc(i + 1);
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if ((*tab)[*tab_pos] == NULL)
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return (-1);
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memset((*tab)[*tab_pos], 0, i + 1);
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strncpy((*tab)[(*tab_pos)++], str, i);
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}
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(*counter)++;
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return (i);
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}
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//
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// parser_get_inibitor()
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// This function will get the content of an inibitor (and check if the
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// inibitor charactere are alone or not).
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//
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static ssize_t parser_get_inibitor(char ***tab, size_t *tab_pos,
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char const *str, int *counter)
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{
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ssize_t i;
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i = 0;
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while (str[++i] != '\0' && str[i] != '\"');
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if (str[i] != '\"')
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return (0);
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if (*tab != NULL){
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(*tab)[*tab_pos] = (char*)malloc(i + 1);
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if ((*tab)[*tab_pos] == NULL)
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return (-1);
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memset((*tab)[*tab_pos], 0, i + 1);
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strncpy((*tab)[(*tab_pos)++], str + 1, i - 1);
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}
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(*counter)++;
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return (i + 1);
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}
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//
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// parser_setup_arg()
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// This function remove useless spaces, tabs and handle '\"' inibithor.
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// Return the number of word(s) stored in `str`.
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//
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static int parser_entry(char ***tab, char const *str)
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{
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size_t tab_pos;
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ssize_t size;
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int counter;
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str--;
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counter = 0;
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tab_pos = 0;
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while (*(++str) != '\0' && *str != '\n'){
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if (*str == '\"'){
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size = parser_get_inibitor(tab, &tab_pos, str, &counter);
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if (size < 0)
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return (-1);
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str += size;
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}
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if (*str != ' ' && *str != '\t'){
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size = parser_get_word(tab, &tab_pos, str, &counter) - 1;
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if (size < 0)
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return (-1);
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str += size;
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}
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}
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return (counter);
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}
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//TODO:
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// - write doc !
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int strtotab(int *argc, char ***argv, char const *str)
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{
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int i;
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// Check memory fault.
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if (argc == NULL || argv == NULL || str == NULL)
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return (EFAULT);
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// Get the number of word.
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*argv = NULL;
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*argc = parser_entry(argv, str);
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if (*argc <= 0)
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return (EINVAL);
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// Alloc tab.
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*argv = (char **)malloc(sizeof(char *) * (*argc + 1));
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if (*argv == NULL)
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return (ENOMEM);
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i = *argc;
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while (--i >= 0)
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(*argv)[i] = NULL;
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// Get word.
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if (parser_entry(argv, str) != *argc){
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strtotab_quit(argc, argv);
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return (ENOMEM);
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}
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(*argv)[*argc] = NULL;
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return (0);
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}
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void strtotab_quit(int *argc, char ***argv)
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{
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if (argc == NULL || argv == NULL)
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return;
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if (*argv == NULL){
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*argc = 0;
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return;
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}
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while (--(*argc) >= 0)
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free((*argv)[*argc]);
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free(*argv);
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*argv = NULL;
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*argc = 0;
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}
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