1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "7ed.h"
#include "input.h"
#include <stdint.h>
#define VERSION 2
#define USAGE "7ed [OPTION] [FILENAME]\n" \
"\nVALID COMMAND-LINE OPTIONS:\n\n"\
" -v Prints out the version number\n"\
" -i Input file\n\n"\
"To use the text editor you need to enter appropriate commands.\n"\
"The prompt will display the current 'Focus' which is the line number\n"\
"that you are currently focused on. So for example the prompt can look like this:\n"\
"\n"\
"(1): \n"\
" \n"\
"The '1' is the line number that you are on and after the ':' is where you can\n"\
"enter commands.\n"\
"\n"\
"VALID COMMANDS:\n\n"\
" L Opens a new prompt asking for the line number you want to change 'focus' to\n"\
" C Prints out the filename and the amount of lines in the file to stdout\n"\
" P Prints out the current line that is in 'focus'\n"\
" A Prints out the entire file contents to stdout\n"\
" Q Quit the program\n"\
" E Enter 'edit mode' on the current line in 'focus'\n"\
" N Create a newline on the line after focus\n"\
" X Remove all contents of a line except the newline itself\n"\
" D Remove all contents of a line including the newline itself\n"\
" \n"\
"It is possible to use some of these commands along wih numbers and '+' or '-'.\n"\
"Commands that support this functionality: L, N, X, D\n"\
"VALID EXAMPLES:\n"\
" \n"\
" 'L+' Would increment the line focus by 1. If you were to put a '-' then it would decrement.\n"\
" 'L10' Would change the focus to line number 10.\n"\
" 'L+10 Would increment the line focus by 10. If you were to put a '-' then it would decrement by 10.\n"\
" 'N', 'N+', 'N+1' Are all valid but do the same thing.\n"\
" 'N+10' Would add 10 more lines.\n"\
" 'N10 Would add a line after line 10.'\n"\
" 'X', 'X+', 'X+1' Are all valid but do the same thing. \n"\
" 'X10' Would remove the contents of line 10.\n"\
" 'X+10' Would remove the contents of the current line including the next 9 lines.\n"\
" 'D', 'D+', 'D+1' Are all valid but do the same thing. \n"\
" 'D10' Would remove line 10 entirely.\n"\
" 'D+10' Would remove the current line entirely as well as entirely remove the next 9 lines.\n"\
#define PROGRAM_NAME "7ed"
uint8_t g_choicemode = MODE_NORMAL;
int main (int argc, char *argv[]) {
if (argc == 1) {
fprintf(stderr, "%s: Please provide a file.\n%s\n", argv[0], USAGE);
return EXIT_FAILURE;
}
int i_used = FALSE_7ED; // These flags are to make sure -v and -i dont get used together. It makes the program feel a bit nicer.
int v_used = FALSE_7ED;
int y_used = FALSE_7ED;
int n_used = FALSE_7ED;
int opt;
int returnval;
char *optarg_copy = NULL; // We will copy optarg to this
while ((opt = getopt(argc, argv, "i:vyn")) != -1) {
switch (opt) {
case 'i':
optarg_copy = malloc(strlen(optarg) + 1); // malloc memory for optarg_copy
strcpy(optarg_copy, optarg); // Copy optarg to optarg_copy
i_used = TRUE_7ED;
break;
case 'v':
v_used = TRUE_7ED;
break;
case 'y':
y_used = TRUE_7ED;
break;
case 'n':
n_used = TRUE_7ED;
break;
}
}
if (i_used == TRUE_7ED && v_used == TRUE_7ED) { // If both flags are used print usage and exit
free(optarg_copy);
fprintf(stderr, "%s", USAGE);
return EXIT_FAILURE;
}
if (n_used == TRUE_7ED && y_used == TRUE_7ED) { // If both YES and NO are used print usage and exit
free(optarg_copy);
fprintf(stderr, "%s", USAGE);
return EXIT_FAILURE;
}
if (i_used == TRUE_7ED) { // enter startmode if we used 'i'
if(n_used == TRUE_7ED) { g_choicemode = MODE_NO; }
if(y_used == TRUE_7ED) { g_choicemode = MODE_YES; }
returnval = startmode(optarg_copy);
if (returnval == 1) {
free(optarg_copy);
return EXIT_FAILURE;
}
free(optarg_copy);
}
if (v_used == TRUE_7ED) { // print version
fprintf(stdout, "7Editor Version %d\n", VERSION);
}
return EXIT_SUCCESS;
}
|
