155 lines
2.5 KiB
C
155 lines
2.5 KiB
C
#ifndef ARGV_H
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#define ARGV_H
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static char *decode_string(char *str)
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{
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size_t str_len = strlen(str), i = 0;
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char *dest = str;
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if ((str_len > 1) && ((*str == '\"') || (*str == '\'')) && (str[str_len-1] == *str))
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{
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memmove(str, str+1, str_len-2);
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str[str_len-2] = 0;
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}
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while (*str)
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{
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if (*str == '\\')
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{
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str++;
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}
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dest[i++] = *str++;
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}
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dest[i] = 0;
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return(dest);
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}
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static char *find_next_match(char *str, char match_char)
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{
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char *pos = 0;
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while (*str)
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{
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if (*str == match_char)
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{
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pos = str;
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break;
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}
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if (*str == '\\')
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{
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if (str[1])
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{
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str++;
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}
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else
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{
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break;
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}
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}
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str++;
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}
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return(pos);
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}
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static char *get_param(char *str)
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{
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static char *pos = 0;
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char *token = 0;
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if (str) //Start a new string?
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{
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pos = str;
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}
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if (pos)
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{
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//Skip delimiters
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while (*pos == ' ') { pos++; }
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if (*pos)
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{
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token = pos;
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//Skip non-delimiters
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while (*pos && (*pos != ' '))
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{
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//Skip quoted characters
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if ((*pos == '\"') || (*pos == '\''))
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{
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char *match_pos = 0;
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if ((match_pos = find_next_match(pos+1, *pos)))
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{
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pos = match_pos;
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}
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}
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//Skip escaped spaces
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if (*pos == '\\') { pos++; }
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pos++;
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}
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if (*pos) { *pos++ = '\0'; }
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}
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}
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return(token);
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}
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static size_t count_param(char *str)
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{
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size_t i = 0;
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while (*str)
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{
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//Skip delimiters
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while (*str == ' ') { str++; }
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//Skip non-delimiters
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while (*str && (*str != ' '))
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{
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//Skip quoted characters
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if ((*str == '\"') || (*str == '\''))
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{
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char *match_str = 0;
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if ((match_str = find_next_match(str+1, *str)))
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{
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str = match_str;
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}
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}
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//Skip escaped spaces
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if (*str == '\\') { str++; }
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str++;
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}
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i++;
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}
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return(i);
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}
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static char **build_argv(char *str)
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{
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size_t argc = count_param(str);
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char **argv = (char **)malloc(sizeof(char *)*(argc+1));
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if (argv)
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{
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char *p, **argp = argv;
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for (p = get_param(str); p; p = get_param(0), argp++)
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{
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*argp = decode_string(p);
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}
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*argp = 0;
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return(argv);
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}
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return(0);
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}
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/*
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static void argv_print(char **argv)
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{
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char **argp = argv;
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while (*argp)
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{
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printf("argv[%u]: %s\n", argp-argv, *argp);
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argp++;
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}
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printf("argv[%u]: NULL\n", argp-argv);
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}
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*/
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#endif
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