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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "7ed.h"
#include <stdint.h>
int write_line(char filename[], long focus, char editbuffer[], size_t editbuffer_size) {
char *line;
size_t start;
int ret = GET_LINE(filename, focus, &line, &start); // get start position of focus
if (ret == 1) {
return EXIT_FAILURE;
}
FILE *file;
FILE *temp;
file = fopen(filename,"r"); // Open file
temp = fopen("temp.7ed","w+");
if (file == NULL || temp == NULL) { // Check if you can open file
fprintf(stderr, "Cannot open file. write_line\n");
return 1;
}
fseek(file, start, SEEK_SET);
size_t count = 0;
while (1) {
char c = fgetc(file);
if (c == '\n') {
break; // count the length of the specific line to be replaced
} else if (c == EOF) {
break;
} else {
count++;
}
}
fseek(file, 0, SEEK_SET); // go to start of file
size_t counter = 0;
char ch;
for (;; counter++) { // for loop that puts contents of file in to temp
// when counter is equal to start, the buffer with the edited content is written to temp
if (start == counter) { // after that it uses fseek to point temp right after the written content
fprintf(temp, "%s", editbuffer); // and fseek on file will use count variable to skip the content that is supposed to be replaced
fseek(temp, start+editbuffer_size-1, SEEK_SET); // After that the function keeps writing everything else to temp
fseek(file, start+count, SEEK_SET);
}
ch = fgetc(file);
if (ch == EOF) {
break;
}
fputc(ch, temp);
}
fseek(temp, 0, SEEK_SET); // reset both files to start at 0 so it doesnt mess with fread and fwrite
fclose(file);
file = fopen(filename, "w");
if (file == NULL) { // Check if you can open file
fprintf(stderr, "Cannot open file for writing.\n");
return 1;
}
char buffer[BUF_SZ_2];
size_t bytes_read;
while ((bytes_read = fread(buffer, 1, BUF_SZ_2, temp)) > 0) { // Write contents of temp to file
fwrite(buffer, 1, bytes_read, file);
}
free(line);
fclose(file);
fclose(temp);
remove("temp.7ed");
return 0;
}
int NEW_LINE(char filename[]) { // doin this test again
long new_line_pos;
long new_line_pos_temp;
char buf[1024];
int success;
do {
fprintf(stdout, "Create a new line after: ");
if (!fgets(buf, 1024, stdin)) {
fprintf(stderr, "Too many characters\n");
break;
}
char *endptr;
new_line_pos_temp = strtol(buf, &endptr, 10);
errno = 0;
if (errno == ERANGE) {
fprintf(stderr, "Sorry, this number is too small or too large.\n");
success = 0;
}
else if (endptr == buf) {
// no character was read
success = 0;
}
else if (*endptr && *endptr != '\n') {
success = 0;
}
else {
success = 1;
}
} while (!success);
if (new_line_pos_temp < 1) {
fprintf(stderr, "The new line can not be under 0!\n");
return 1;
} else {
new_line_pos = new_line_pos_temp;
char *line;
size_t start;
int ret = GET_LINE(filename, new_line_pos, &line, &start);
if (ret == 1) {
return 1;
}
size_t len = strlen(line);
char *newline_and_line = malloc(len+2);
strcpy(newline_and_line, line);
strcat(newline_and_line, "\n");
write_line(filename, new_line_pos, newline_and_line, 1);
free(newline_and_line);
}
return 0;
}
int editmode(char filename[], long focus) {
char *line;
size_t start;
int ret = GET_LINE(filename, focus, &line, &start);
if (ret == 1) {
return EXIT_FAILURE;
}
fprintf(stdout, "%s", line); // print line to be edited
free(line);
while (1) {
char editbuffer[BUF_SZ_2];
fprintf(stdout, "(%ld EDIT): ", focus);
fgets(editbuffer, BUF_SZ_2, stdin);
if (editbuffer[0] == '\n') { continue; }
fprintf(stdout, "Do you want to write the changes?\n");
int yesno = CHOICE();
if (yesno == 1) {
printf("N\n");
return 0;
}
size_t editbuffer_size = strlen(editbuffer);
write_line(filename, focus, editbuffer, editbuffer_size);
return 0;
}
return EXIT_SUCCESS;
}
|
