diff options
Diffstat (limited to 'editmode.c')
| -rw-r--r-- | editmode.c | 109 |
1 files changed, 109 insertions, 0 deletions
@@ -0,0 +1,109 @@ +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include "7ed.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","r+"); +if (file == NULL || temp == NULL) { // Check if you can open file + fprintf(stderr, "Cannot open file.\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 +fseek(file, 0, SEEK_SET); +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); + +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; + +}
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