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#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "7ed.h"
#include <stdint.h>
int ncat(char filename[]) {
FILE *file;
file = fopen(filename,"r");
if (file == NULL) {
fprintf(stderr, "Cannot open file. ncat\n");
return 1;
}
char buffer[BUF_SZ_2];
size_t bytes_read;
while ((bytes_read = fread(buffer, 1, BUF_SZ_2, file)) > 0) {
fwrite(buffer, 1, bytes_read, stdout);
}
fclose(file);
return 0;
}
int startmode(char filename[]) {
// The entry to the program. Count lines and display the count. Also show which file is being edited.
uint64_t Flines;
int returnval = count_lines_in_file(filename, &Flines);
if (returnval == 1) {
return 1;
}
fprintf(stdout,"%s %lu lines\n", filename, Flines);
uint64_t focus = 1; // The focus variable. Which is the actual line number we have "selected"
while(1) { // The main loop to get the "UI" started
firstwhile:
int ret = count_lines_in_file(filename, &Flines);
if (ret == 1) {
return EXIT_FAILURE;
}
fprintf(stdout, "(%lu): ", focus);
char command = getchar();
if (command == '\n') {
continue;
}
while ('\n' != getchar());
switch (command) {
case 'L':
case 'l': // L is how we change out "focus"
uint64_t Lfocus = 0;
char buf[1024];
int success;
do {
fprintf(stdout, "(L): ");
if (!fgets(buf, 1024, stdin)) {
fprintf(stderr, "Too many characters\n");
break;
}
if (buf[0] == '\n') {
goto firstwhile; // If the user presses enter then we just goto start of the main loop
}
if (buf[0] == '+') { // if user inputs + then increment by 1
Lfocus = focus+1;
break;
}
if (buf[0] == '-') { // If user inputs - then decrement by 1
Lfocus = focus-1;
break;
}
char *endptr;
Lfocus = 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') {
// *endptr is neither end of string nor newline,
// so we didn't convert the *whole* input
success = 0;
}
else {
success = 1;
}
} while (!success);
if (Lfocus < 1 || Lfocus > Flines) {
fprintf(stderr, "L is either less than 1 or more than %lu\n", Flines);
} else {
focus = Lfocus;
}
break;
case 'P':
case 'p':
char *line;
size_t start;
int ret = get_line(filename, focus, &line, &start);
if (ret == 1) {
return EXIT_FAILURE;
}
fprintf(stdout, "%s", line);
free(line);
break;
case 'E':
case 'e':
editmode(filename, focus);
break;
case 'C':
case 'c':
uint64_t CFlines;
int returnval = count_lines_in_file(filename, &CFlines);
if (returnval == 1) {
return EXIT_FAILURE;
}
fprintf(stdout,"%s %zu lines\n", filename, CFlines);
break;
case 'Q':
case 'q':
return EXIT_SUCCESS;
break;
case 'a':
case 'A':
ncat(filename);
break;
case 'n':
case 'N': {
new_line(filename, focus); // create new line after the current focus
break; }
case 'X':
case 'x':
int choic = choice();
if (choic == 0) {
remove_line_contents(filename, focus);
}
break;
case 'D':
case 'd': {
int choic = choice();
if (choic == 1) {
break;
}
int increment = 0;
if (focus == 1) { // checks if its line 1. This is so that we can remove the newline properly.
increment++;
}
int rlc = remove_line_contents(filename, focus);
if (rlc == 1) {
return 1;
}
int dsn = delete_specified_newline(filename, focus+increment);
if (dsn == 1) {
return 1;
}
if (focus == 1) {
break;
}
focus--;
break; }
default:
fprintf(stdout, "?\n");
}
}
return EXIT_SUCCESS;
}
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