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#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "7ed.h"
int startmode(char filename[]) {
size_t Flines;
int returnval = COUNT_LINES_IN_FILE(filename, &Flines);
if (returnval == 1) {
return EXIT_FAILURE;
}
fprintf(stdout,"%s %ld lines\n", filename, Flines);
long focus = 1;
while(1) {
fprintf(stdout, "(%ld): ", focus);
char command = getchar();
if (command == '\n') {
continue;
}
while ('\n' != getchar());
switch (command) {
case 'L':
case 'l':
long Lfocus;
char buf[1024];
int success;
do {
fprintf(stdout, "(L): ");
if (!fgets(buf, 1024, stdin)) {
fprintf(stderr, "Too many characters\n");
break;
}
char *endptr;
Lfocus = strtol(buf, &endptr, 10);
errno = 0;
if (errno == ERANGE) {
printf("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 > (long)Flines) {
fprintf(stdout, "L is either less than 1 or more than %ld\n", Flines);
} else {
focus = Lfocus;
}
break;
case 'P':
case 'p':
char *line;
int ret = GET_LINE(filename, focus, &line);
if (ret == 1) {
return EXIT_FAILURE;
}
printf("%s", line);
free(line);
break;
case 'E':
case 'e':
printf("EDIT MODE\n");
break;
case 'Q':
case 'q':
return EXIT_SUCCESS;
break;
default:
printf("?\n");
}
}
return EXIT_SUCCESS;
}
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