├── .gitignore ├── etc └── led.gif ├── include ├── execute.h ├── append.h ├── file.h ├── prompt.h ├── delete.h ├── insert.h ├── io.h ├── main.h ├── misc.h ├── buffer.h └── parser.h ├── src ├── prompt.c ├── append.c ├── main.c ├── io.c ├── file.c ├── execute.c ├── misc.c ├── parser.c ├── delete.c ├── buffer.c └── insert.c ├── CMakeLists.txt ├── README.md └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | build/ 2 | 3 | -------------------------------------------------------------------------------- /etc/led.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/wengwalker/led/HEAD/etc/led.gif -------------------------------------------------------------------------------- /include/execute.h: -------------------------------------------------------------------------------- 1 | #ifndef EXECUTE_H 2 | #define EXECUTE_H 3 | 4 | int execute_command(tokens_t token); 5 | 6 | #endif 7 | -------------------------------------------------------------------------------- /include/append.h: -------------------------------------------------------------------------------- 1 | #ifndef APPEND_H 2 | #define APPEND_H 3 | 4 | void append_data(uint8_t new_line_flag); 5 | 6 | #endif 7 | -------------------------------------------------------------------------------- /include/file.h: -------------------------------------------------------------------------------- 1 | #ifndef FILE_H 2 | #define FILE_H 3 | 4 | void save_buffer(char* filename, const char* mode); 5 | void fill_buffer(char* filename, uint8_t new_line_flag); 6 | 7 | #endif 8 | -------------------------------------------------------------------------------- /include/prompt.h: -------------------------------------------------------------------------------- 1 | #ifndef PROMPT_H 2 | #define PROMPT_H 3 | 4 | void print_prompt(void); 5 | void set_custom_prompt(const char* const string); 6 | void set_default_prompt(void); 7 | 8 | #endif 9 | -------------------------------------------------------------------------------- /include/delete.h: -------------------------------------------------------------------------------- 1 | #ifndef DELETE_H 2 | #define DELETE_H 3 | 4 | void delete_line(size_t line_number); 5 | void delete_range_of_lines(const char* const line1_start, const char* const line2_end); 6 | 7 | #endif 8 | -------------------------------------------------------------------------------- /include/insert.h: -------------------------------------------------------------------------------- 1 | #ifndef INSERT_H 2 | #define INSERT_H 3 | 4 | void insert_after(const char* const data, int new_line_flag); 5 | void insert_before(const char* const data, int new_line_flag); 6 | 7 | #endif 8 | -------------------------------------------------------------------------------- /include/io.h: -------------------------------------------------------------------------------- 1 | #ifndef IO_H 2 | #define IO_H 3 | 4 | #define DONT_SKIP_NEW_LINE 1 5 | #define SKIP_NEW_LINE 0 6 | #define IBUF_SIZE 128 7 | 8 | char* read_from_stream(FILE* stream, uint8_t new_line_flag); 9 | 10 | #endif 11 | -------------------------------------------------------------------------------- /include/main.h: -------------------------------------------------------------------------------- 1 | #ifndef MAIN_H 2 | #define MAIN_H 3 | 4 | #define QUIT_FLAG 1 5 | #define DONT_QUIT_FLAG 0 6 | 7 | extern bool is_data_saved; 8 | extern char* global_buffer; 9 | extern char* global_filename; 10 | 11 | #endif 12 | -------------------------------------------------------------------------------- /include/misc.h: -------------------------------------------------------------------------------- 1 | #ifndef MISC_H 2 | #define MISC_H 3 | 4 | void fail(FILE* out, const char* fmt, ...); 5 | void warning(FILE* out, const char* fmt, ...); 6 | void help(void); 7 | void version(void); 8 | void set_filename(const char* const string); 9 | void print_filename(void); 10 | size_t get_number(const char *line); 11 | 12 | #endif 13 | -------------------------------------------------------------------------------- /include/buffer.h: -------------------------------------------------------------------------------- 1 | #ifndef BUFFER_H 2 | #define BUFFER_H 3 | 4 | #define OUTPUT_NUMBERED_LINES 1 5 | #define DONT_OUTPUT_NUMBERED_LINES 0 6 | 7 | char* alloc_buffer(size_t size); 8 | char* realloc_buffer(char* buffer, size_t old_size, size_t size_of_added_data); 9 | size_t get_buffer_size(const char* const buffer); 10 | size_t get_number_of_lines(const char* const buffer); 11 | size_t get_position_at_line(const char* const buffer, size_t line_number, bool *is_err); 12 | void clean_buffer(void); 13 | void print_buffer(const char* const buffer, char* line, uint8_t numbered_lines_flag); 14 | void print_buffer_by_char(const char* const buffer); 15 | void free_buffer_pointers(void); 16 | 17 | #endif 18 | -------------------------------------------------------------------------------- /src/prompt.c: -------------------------------------------------------------------------------- 1 | #define _GNU_SOURCE 2 | #include 3 | #include 4 | #include 5 | #include "misc.h" 6 | 7 | static char* prompt_pointer = NULL; 8 | static const char* const default_prompt = ">"; 9 | 10 | void print_prompt(void) 11 | { 12 | if(prompt_pointer == NULL) { 13 | if(default_prompt == NULL) { 14 | fail(stderr, "error: null prompt pointers\n"); 15 | } 16 | 17 | printf("%s ", default_prompt); 18 | } else { 19 | printf("%s ", prompt_pointer); 20 | } 21 | } 22 | 23 | void set_custom_prompt(const char* const string) 24 | { 25 | if(string == NULL) { 26 | warning(stderr, "there is no prompt line\n"); 27 | return; 28 | } 29 | 30 | if(prompt_pointer != NULL) { 31 | free(prompt_pointer); 32 | prompt_pointer = NULL; 33 | } 34 | 35 | prompt_pointer = strdup(string); 36 | if(prompt_pointer == NULL) { 37 | fail(stderr, "error: allocation error for prompt pointer\n"); 38 | } 39 | } 40 | 41 | void set_default_prompt(void) 42 | { 43 | if(prompt_pointer != NULL) { 44 | free(prompt_pointer); 45 | prompt_pointer = NULL; 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /include/parser.h: -------------------------------------------------------------------------------- 1 | #ifndef PARSER_H 2 | #define PARSER_H 3 | 4 | typedef enum argument_type { 5 | UNKNOWN_TYPE = 0, 6 | DONT_USES_ARG, 7 | USES_ONE_BIG_ARG, 8 | USES_A_FEW_SMALL_ARGS 9 | } argument_type_t; 10 | 11 | typedef enum command_token { 12 | UNKNOWN_TOKEN = 0, 13 | QUIT, 14 | SET_CUSTOM_PROMPT, 15 | SET_DEFAULT_PROMPT, 16 | CLEAN_BUFFER, 17 | PRINT_DEFAULT, 18 | PRINT_NUMBERED_LINES, 19 | APPEND, 20 | APPEND_NL, 21 | PRINT_BY_CHAR, 22 | SET_FILENAME, 23 | PRINT_FILENAME, 24 | WRITE_BUF, 25 | WRITE_BUF_APPEND, 26 | FILL_BUF, 27 | FILL_BUF_NL, 28 | INSERT_AFTER, 29 | INSERT_AFTER_NL, 30 | INSERT_BEFORE, 31 | INSERT_BEFORE_NL, 32 | DELETE_LINE, 33 | DELETE_LINES_IN_RANGE 34 | } command_token_t; 35 | 36 | typedef struct tokens { 37 | argument_type_t command_arg_type; 38 | command_token_t token_type; 39 | } tokens_t; 40 | 41 | extern char* one_big_argument_pointer; 42 | extern char* first_small_argument_pointer; 43 | extern char* second_small_argument_pointer; 44 | 45 | tokens_t parse_command(const char* const input_buffer); 46 | void free_argument_pointers(void); 47 | 48 | #endif 49 | -------------------------------------------------------------------------------- /src/append.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include "main.h" 7 | #include "io.h" 8 | #include "buffer.h" 9 | 10 | void append_data(uint8_t new_line_flag) 11 | { 12 | char* input_buffer = NULL; 13 | size_t input_buffer_size = 0; 14 | size_t buffer_size = 0; 15 | 16 | input_buffer = read_from_stream(stdin, DONT_SKIP_NEW_LINE); 17 | while(strcmp(input_buffer, ".") != 0) { 18 | if(!global_buffer) { 19 | input_buffer_size = strlen(input_buffer) + 1; 20 | global_buffer = alloc_buffer(input_buffer_size); 21 | 22 | strncpy(global_buffer, input_buffer, input_buffer_size); 23 | } else { 24 | input_buffer_size = strlen(input_buffer) + 1; 25 | buffer_size = get_buffer_size(global_buffer); 26 | 27 | global_buffer = realloc_buffer(global_buffer, buffer_size, input_buffer_size); 28 | 29 | strncpy(global_buffer + buffer_size, input_buffer, input_buffer_size); 30 | 31 | if(new_line_flag == DONT_SKIP_NEW_LINE) { 32 | global_buffer[buffer_size - 1] = '\n'; 33 | } else { 34 | global_buffer[buffer_size - 1] = ' '; 35 | } 36 | } 37 | free(input_buffer); 38 | input_buffer = read_from_stream(stdin, DONT_SKIP_NEW_LINE); 39 | } 40 | 41 | free(input_buffer); 42 | is_data_saved = false; 43 | } 44 | -------------------------------------------------------------------------------- /src/main.c: -------------------------------------------------------------------------------- 1 | #define _GNU_SOURCE 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include "misc.h" 8 | #include "prompt.h" 9 | #include "parser.h" 10 | #include "main.h" 11 | #include "buffer.h" 12 | #include "execute.h" 13 | 14 | char* global_buffer = NULL; 15 | char* global_filename = NULL; 16 | bool is_data_saved = true; 17 | 18 | static void parse_arguments(int argc, char **argv) 19 | { 20 | int result; 21 | 22 | while((result = getopt(argc, argv, "hvf:")) != -1) { 23 | switch(result) { 24 | case 'h': 25 | help(); 26 | exit(EXIT_SUCCESS); 27 | case 'v': 28 | version(); 29 | exit(EXIT_SUCCESS); 30 | case 'f': 31 | set_filename(optarg); 32 | break; 33 | default: 34 | printf("-%c - unknown option\n", optopt); 35 | break; 36 | } 37 | } 38 | } 39 | 40 | static void editor_loop(void) 41 | { 42 | tokens_t token = { UNKNOWN_TYPE, UNKNOWN_TOKEN }; 43 | size_t size = 0; 44 | char* line = NULL; 45 | 46 | print_prompt(); 47 | while(getline(&line, &size, stdin) != -1) { 48 | token = parse_command(line); 49 | 50 | if(execute_command(token) == QUIT_FLAG) 51 | break; 52 | 53 | print_prompt(); 54 | } 55 | 56 | free(line); 57 | free_buffer_pointers(); 58 | } 59 | 60 | int main(int argc, char **argv) 61 | { 62 | parse_arguments(argc, argv); 63 | 64 | editor_loop(); 65 | 66 | return 0; 67 | } 68 | -------------------------------------------------------------------------------- /src/io.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include "misc.h" 5 | #include "io.h" 6 | 7 | char* read_from_stream(FILE* stream, uint8_t new_line_flag) 8 | { 9 | if(stream == NULL) { 10 | fail(stderr, "error: null stream pointer\n"); 11 | } 12 | 13 | int c; 14 | size_t input_buffer_size = IBUF_SIZE; 15 | size_t position = 0; 16 | char* input_buffer = calloc(input_buffer_size, sizeof(char)); 17 | if(input_buffer == NULL) { 18 | fail(stderr, "error: allocation error for input buffer\n"); 19 | } 20 | 21 | while(1) { 22 | c = fgetc(stream); 23 | 24 | if(new_line_flag == SKIP_NEW_LINE) { 25 | if(c == EOF) { 26 | input_buffer[position] = '\0'; 27 | return input_buffer; 28 | } else { 29 | input_buffer[position] = (char)c; 30 | } 31 | } else if(new_line_flag == DONT_SKIP_NEW_LINE) { 32 | if(c == EOF || c == '\n') { 33 | input_buffer[position] = '\0'; 34 | return input_buffer; 35 | } else { 36 | input_buffer[position] = (char)c; 37 | } 38 | } else { 39 | fail(stderr, "error: invalid value for new_line_flag\n"); 40 | } 41 | 42 | position++; 43 | 44 | if(position >= input_buffer_size) { 45 | input_buffer_size += IBUF_SIZE; 46 | input_buffer = realloc(input_buffer, input_buffer_size); 47 | if(input_buffer == NULL) { 48 | fail(stderr, "error: reallocation error for input_buffer\n"); 49 | } 50 | } 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /CMakeLists.txt: -------------------------------------------------------------------------------- 1 | cmake_minimum_required(VERSION 3.0) 2 | 3 | project(led 4 | VERSION 0.3 5 | DESCRIPTION "led - line-oriented text editor" 6 | LANGUAGES C) 7 | 8 | if(NOT UNIX) 9 | message(FATAL_ERROR "Your system is not unix. Fail to build.") 10 | endif() 11 | 12 | if(NOT CMAKE_BUILD_TYPE) 13 | set(CMAKE_BUILD_TYPE Debug) 14 | endif() 15 | 16 | set(CMAKE_C_FLAGS_RELEASE "-std=c99 -O2 -DNDEBUG") 17 | 18 | if(CMAKE_C_COMPILER_ID STREQUAL "GNU") 19 | set(CMAKE_C_FLAGS_DEBUG "-DDEBUG -std=c99 -Wall -Wextra -g -O0 -Wpedantic -Wshadow -Wvla -Wpointer-arith -Wwrite-strings -Wfloat-equal -Wcast-align -Wcast-qual -Wbad-function-cast -Wstrict-overflow=4 -Wunreachable-code -Wformat=2 -Wundef -Wstrict-prototypes -Wold-style-definition -Wconversion -Wshift-overflow=2 -Wredundant-decls -Wnested-externs -Wmissing-include-dirs -Wlogical-op -Wcast-align=strict -Wduplicated-cond -Wjump-misses-init -Wstringop-overflow") 20 | elseif(CMAKE_C_COMPILER_ID STREQUAL "Clang") 21 | set(CMAKE_C_FLAGS_DEBUG "-DDEBUG -std=c99 -Wall -Wextra -g -O0 -Wpedantic -Wshadow -Wvla -Wpointer-arith -Wwrite-strings -Wfloat-equal -Wcast-align -Wcast-qual -Wbad-function-cast -Wstrict-overflow=4 -Wunreachable-code -Wformat=2 -Wundef -Wstrict-prototypes -Wold-style-definition -Wconversion -Wshift-overflow -Wredundant-decls -Wnested-externs -Wmissing-include-dirs") 22 | else() 23 | message(FATAL_ERROR "Clang or GCC is not installed on your system. Fail to build.") 24 | endif() 25 | 26 | set(EXECUTABLE led) 27 | set(INSTALL_DIR bin) 28 | set(INCLUDE_DIR include) 29 | set(SOURCE 30 | src/append.c 31 | src/buffer.c 32 | src/buffer.c 33 | src/delete.c 34 | src/file.c 35 | src/insert.c 36 | src/io.c 37 | src/misc.c 38 | src/parser.c 39 | src/prompt.c 40 | src/main.c 41 | src/execute.c) 42 | 43 | add_executable(${EXECUTABLE} ${SOURCE}) 44 | 45 | target_include_directories(${EXECUTABLE} PRIVATE ${INCLUDE_DIR}) 46 | 47 | install(TARGETS ${EXECUTABLE} DESTINATION ${CMAKE_INSTALL_PREFIX}/${INSTALL_DIR}) 48 | 49 | -------------------------------------------------------------------------------- /src/file.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include "main.h" 7 | #include "misc.h" 8 | #include "buffer.h" 9 | #include "io.h" 10 | 11 | static char* choose_filename(char* filename) 12 | { 13 | if(filename == NULL) { 14 | if(global_filename == NULL) { 15 | return NULL; 16 | } 17 | 18 | return global_filename; 19 | } 20 | return filename; 21 | } 22 | 23 | void save_buffer(char* filename, const char* mode) 24 | { 25 | FILE* fp = NULL; 26 | char* current_filename = NULL; 27 | size_t buffer_length; 28 | 29 | buffer_length = get_buffer_size(global_buffer); 30 | if(buffer_length == 0) { 31 | printf("buffer is empty\n"); 32 | return; 33 | } 34 | buffer_length--; // write without '\0' character 35 | 36 | current_filename = choose_filename(filename); 37 | if(current_filename == NULL) { 38 | printf("unknown filename, please type another filename\n"); 39 | return; 40 | } 41 | 42 | fp = fopen(current_filename, mode); 43 | if(fp == NULL) { 44 | warning(stderr, "warning: cannot save buffer - file can't open or doesn't exists\n"); 45 | return; 46 | } 47 | 48 | if(fwrite(global_buffer, buffer_length, 1, fp) != 1) { 49 | fail(stderr, "error: fwrite() failed\n"); 50 | } 51 | 52 | printf("written %zd bytes\n", buffer_length); 53 | 54 | fclose(fp); 55 | is_data_saved = true; 56 | } 57 | 58 | void fill_buffer(char* filename, uint8_t new_line_flag) 59 | { 60 | size_t buffer_length, temp_buffer_length; 61 | char* temp_buffer = NULL; 62 | char* current_filename = NULL; 63 | FILE* fp = NULL; 64 | 65 | current_filename = choose_filename(filename); 66 | if(current_filename == NULL) { 67 | printf("unknown filename, please type another filename\n"); 68 | return; 69 | } 70 | 71 | fp = fopen(current_filename, "r+"); 72 | if(fp == NULL) { 73 | warning(stderr, "warning: cannot open this %s file\n", current_filename); 74 | return; 75 | } 76 | 77 | temp_buffer = read_from_stream(fp, SKIP_NEW_LINE); 78 | fclose(fp); 79 | 80 | buffer_length = get_buffer_size(global_buffer); 81 | 82 | temp_buffer_length = strlen(temp_buffer) + 1; 83 | global_buffer = realloc_buffer(global_buffer, buffer_length, temp_buffer_length); 84 | 85 | strncpy(global_buffer + buffer_length, temp_buffer, temp_buffer_length); 86 | if(buffer_length != 0) { 87 | if(new_line_flag == DONT_SKIP_NEW_LINE) { 88 | global_buffer[buffer_length - 1] = '\n'; 89 | } else { 90 | global_buffer[buffer_length - 1] = ' '; 91 | } 92 | } 93 | 94 | free(temp_buffer); 95 | is_data_saved = false; 96 | } 97 | -------------------------------------------------------------------------------- /src/execute.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include "main.h" 6 | #include "prompt.h" 7 | #include "parser.h" 8 | #include "buffer.h" 9 | #include "append.h" 10 | #include "delete.h" 11 | #include "insert.h" 12 | #include "file.h" 13 | #include "misc.h" 14 | #include "io.h" 15 | 16 | int execute_command(tokens_t token) 17 | { 18 | size_t temp_val; 19 | 20 | switch(token.token_type) { 21 | case QUIT: 22 | if(is_data_saved == false) { 23 | printf("before you quit, please write data in buffer to file or clear buffer\n"); 24 | break; 25 | } 26 | return QUIT_FLAG; 27 | break; 28 | case SET_CUSTOM_PROMPT: 29 | set_custom_prompt(first_small_argument_pointer); 30 | break; 31 | case SET_DEFAULT_PROMPT: 32 | set_default_prompt(); 33 | break; 34 | case CLEAN_BUFFER: 35 | clean_buffer(); 36 | break; 37 | case PRINT_DEFAULT: 38 | print_buffer(global_buffer, first_small_argument_pointer, DONT_OUTPUT_NUMBERED_LINES); 39 | break; 40 | case PRINT_NUMBERED_LINES: 41 | print_buffer(global_buffer, first_small_argument_pointer, OUTPUT_NUMBERED_LINES); 42 | break; 43 | case APPEND: 44 | append_data(SKIP_NEW_LINE); 45 | break; 46 | case APPEND_NL: 47 | append_data(DONT_SKIP_NEW_LINE); 48 | break; 49 | case PRINT_BY_CHAR: 50 | print_buffer_by_char(global_buffer); 51 | break; 52 | case SET_FILENAME: 53 | set_filename(first_small_argument_pointer); 54 | break; 55 | case PRINT_FILENAME: 56 | print_filename(); 57 | break; 58 | case WRITE_BUF: 59 | save_buffer(first_small_argument_pointer, "w+"); 60 | break; 61 | case WRITE_BUF_APPEND: 62 | save_buffer(first_small_argument_pointer, "a+"); 63 | break; 64 | case FILL_BUF: 65 | fill_buffer(first_small_argument_pointer, SKIP_NEW_LINE); 66 | break; 67 | case FILL_BUF_NL: 68 | fill_buffer(first_small_argument_pointer, DONT_SKIP_NEW_LINE); 69 | break; 70 | case INSERT_AFTER: 71 | insert_after(one_big_argument_pointer, SKIP_NEW_LINE); 72 | break; 73 | case INSERT_AFTER_NL: 74 | insert_after(one_big_argument_pointer, DONT_SKIP_NEW_LINE); 75 | break; 76 | case INSERT_BEFORE: 77 | insert_before(one_big_argument_pointer, SKIP_NEW_LINE); 78 | break; 79 | case INSERT_BEFORE_NL: 80 | insert_before(one_big_argument_pointer, DONT_SKIP_NEW_LINE); 81 | break; 82 | case DELETE_LINE: 83 | temp_val = get_number(first_small_argument_pointer); 84 | delete_line(temp_val); 85 | break; 86 | case DELETE_LINES_IN_RANGE: 87 | delete_range_of_lines(first_small_argument_pointer, second_small_argument_pointer); 88 | break; 89 | case UNKNOWN_TOKEN: 90 | default: 91 | printf("unknown command\n"); 92 | break; 93 | } 94 | 95 | free_argument_pointers(); 96 | 97 | return DONT_QUIT_FLAG; 98 | } 99 | -------------------------------------------------------------------------------- /src/misc.c: -------------------------------------------------------------------------------- 1 | #define _GNU_SOURCE 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include "main.h" 10 | #include "buffer.h" 11 | 12 | static const char* const program_version = "0.4"; 13 | 14 | void fail(FILE* out, const char* fmt, ...) 15 | { 16 | va_list ap; 17 | 18 | va_start(ap, fmt); 19 | vfprintf(out, fmt, ap); 20 | va_end(ap); 21 | 22 | exit(EXIT_FAILURE); 23 | } 24 | 25 | void warning(FILE* out, const char* fmt, ...) 26 | { 27 | va_list ap; 28 | 29 | va_start(ap, fmt); 30 | vfprintf(out, fmt, ap); 31 | va_end(ap); 32 | } 33 | 34 | void help(void) 35 | { 36 | printf("usage: led [options...]\n\n"); 37 | 38 | printf("[cli options]:\n"); 39 | printf("\t-h - prints this help message\n"); 40 | printf("\t-v - shows the program version\n"); 41 | printf("\t-f [file] - set the filename by default\n\n"); 42 | 43 | printf("[program commands]:\n"); 44 | printf("\tq - quit\n"); 45 | printf("\tsp [str] - set custom prompt\n"); 46 | printf("\tsd - set default prompt\n"); 47 | printf("\tsf [file] - set filename\n"); 48 | printf("\tc - clean buffer\n"); 49 | printf("\tp - print buffer\n"); 50 | printf("\tpl - print buffer with numbered lines\n"); 51 | printf("\tpc - print buffer by characters\n"); 52 | printf("\tpf - print filename\n"); 53 | printf("\ta - append data to buffer(wihtout \\n)\n"); 54 | printf("\tan - append data to buffer(with \\n)\n"); 55 | printf("\tw [file] - safe buffer to file\n"); 56 | printf("\twa [file] - safe buffer to file(append, not rewrite)\n"); 57 | printf("\tf [file] - fill buffer from file\n"); 58 | printf("\tfn [file] - fill buffer from file(with \\n)\n"); 59 | printf("\tia [line] [str] - insert data after specified line\n"); 60 | printf("\tian [line] [str] - insert data after specified line(with \\n)\n"); 61 | printf("\tib [line] [str] - insert data before specified line\n"); 62 | printf("\tibn [line] [str] - insert data before specified line(with \\n)\n"); 63 | printf("\tdl [line] - delete the specified line\n"); 64 | printf("\tdr [line1] [line2] - delete the lines in the specified range\n"); 65 | } 66 | 67 | void version(void) 68 | { 69 | printf("led version - v%s\n", program_version); 70 | } 71 | 72 | void set_filename(const char* const string) 73 | { 74 | if(string == NULL) { 75 | warning(stderr, "there is no filename\n"); 76 | return; 77 | } 78 | 79 | if(global_filename != NULL) { 80 | free(global_filename); 81 | } 82 | 83 | global_filename = strdup(string); 84 | if(global_filename == NULL) { 85 | fail(stderr, "error: null global filename pointer\n"); 86 | } 87 | } 88 | 89 | void print_filename(void) 90 | { 91 | if(global_filename == NULL) { 92 | printf("filename not specified\n"); 93 | } else { 94 | printf("filename = %s\n", global_filename); 95 | } 96 | } 97 | 98 | size_t get_number(const char *line) 99 | { 100 | if(!line) 101 | return 0; 102 | 103 | size_t number = strtoul(line, NULL, 10); 104 | if(number == 0 || number == ULONG_MAX) 105 | return 0; 106 | 107 | return number; 108 | } -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # What is this? 2 | led is a line-oriented text editor in command line. This editor is similar to the standard program on unix systems - GNU ed. But i'm not going to make an exact clone of that program, it's just a pet project. 3 | 4 | # Features 5 | 6 | Now the program can: 7 | - save text to it's buffer 8 | - write or append text to file 9 | - show the contents of the buffer 10 | - insert or delete text in buffer 11 | - set own prompt in editor 12 | 13 | # Example of usage 14 | 15 |

16 | 17 |

18 | 19 | # How to launch 20 | 21 | This program work only on linux(ubuntu). 22 | 23 | Required tools: gcc, cmake, make, shell(bash). 24 | 25 | To compile and install program type this: 26 | 27 | ```shell 28 | $ ./build.sh 29 | ``` 30 | 31 | Or use cmake directly: 32 | 33 | ```shell 34 | $ mkdir build && cd build 35 | $ # or if you want release version, change option to -DCMAKE_BUILD_TYPE=RELEASE 36 | $ cmake -DCMAKE_BUILD_TYPE=DEBUG -DCMAKE_INSTALL_PREFIX=/usr/local/ .. 37 | $ make 38 | $ sudo make install 39 | ``` 40 | 41 | # Options 42 | 43 | Enter the -h option to check all program options: 44 | 45 | ```sh 46 | $ led -h 47 | usage: led [options...] 48 | 49 | [cli options]: 50 | -h - prints this help message 51 | -v - shows the program version 52 | -f [file] - set the filename by default 53 | 54 | [program commands]: 55 | q - quit 56 | sp [str] - set custom prompt 57 | sd - set default prompt 58 | sf [file] - set filename 59 | cs - clear screen 60 | c - clean buffer 61 | p - print buffer 62 | pl - print buffer with numbered lines 63 | pc - print buffer by characters 64 | pf - print filename 65 | a - append data to buffer(without \n) 66 | an - append data to buffer(with \n) 67 | w [file] - safe buffer to file 68 | wa [file] - safe buffer to file(append, not rewrite) 69 | f [file] - fill buffer from file 70 | fn [file] - fill buffer from file(with \n) 71 | ia [line] [str] - insert data after specified line 72 | ian [line] [str] - insert data after specified line(with \n) 73 | ib [line] [str] - insert data before specified line 74 | ibn [line] [str] - insert data before specified line(with \n) 75 | dl [line] - delete the specified line 76 | dr [line1] [line2] - delete the lines in the specified range 77 | ``` 78 | 79 | Also, you can check build options, by typing -h to build script: 80 | 81 | ```sh 82 | $ ./build.sh -h 83 | usage: ./build.sh [options...] 84 | 85 | options: 86 | -d - compile and install debug version 87 | -r - compile and install release version 88 | -c - delete compiled object files 89 | -h - prints help message 90 | ``` 91 | 92 | It is recommended to use this script from the main repository folder, not a build or other nested directories. 93 | 94 | # TODO list 95 | 96 | - [ ] add linked list, and delete overhead with buffers 97 | - [x] delete getopt_long(), add getopt() 98 | - [ ] rewrite parser 99 | - [x] rewrite build system 100 | - [x] rewrite documentation 101 | - [ ] add a documentation about the program internals 102 | - [ ] add a delete_substring() 103 | - [ ] add a copying function 104 | - [ ] add a addressing strings 105 | - [ ] add a concatenate strings function 106 | - [ ] add a insert function that uses an relative indices in the row for inserting data 107 | 108 | -------------------------------------------------------------------------------- /src/parser.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include "misc.h" 7 | #include "parser.h" 8 | #include "buffer.h" 9 | 10 | static const char* const command_list[] = { 11 | "q", "sp", "sd", "c", "p", "pl", "a", "an", "pc", "sf", 12 | "pf", "w", "wa", "f", "fn", "ia", "ian", "ib", "ibn", 13 | "dl", "dr" 14 | }; 15 | 16 | static const command_token_t token_list[] = { 17 | QUIT, SET_CUSTOM_PROMPT, SET_DEFAULT_PROMPT, CLEAN_BUFFER, 18 | PRINT_DEFAULT, PRINT_NUMBERED_LINES, APPEND, APPEND_NL, 19 | PRINT_BY_CHAR, SET_FILENAME, PRINT_FILENAME, WRITE_BUF, 20 | WRITE_BUF_APPEND, FILL_BUF, FILL_BUF_NL, INSERT_AFTER, 21 | INSERT_AFTER_NL, INSERT_BEFORE, INSERT_BEFORE_NL, 22 | DELETE_LINE, DELETE_LINES_IN_RANGE 23 | }; 24 | 25 | static const size_t command_list_size = sizeof(command_list) / sizeof(command_list[0]); 26 | char* one_big_argument_pointer = NULL; 27 | char* first_small_argument_pointer = NULL; 28 | char* second_small_argument_pointer = NULL; 29 | 30 | static tokens_t get_command_token(const char* const string_token) 31 | { 32 | tokens_t token = { UNKNOWN_TYPE, UNKNOWN_TOKEN }; 33 | if(string_token == NULL) { 34 | //warning(stderr, "error: null token pointer\n"); 35 | return token; 36 | } 37 | 38 | for(size_t i = 0; i < command_list_size; i++) { 39 | if(strcmp(string_token, command_list[i]) == 0) { 40 | token.token_type = token_list[i]; 41 | break; 42 | } 43 | } 44 | 45 | switch(token.token_type) { 46 | case QUIT: 47 | case SET_DEFAULT_PROMPT: 48 | case PRINT_DEFAULT: 49 | case APPEND: 50 | case APPEND_NL: 51 | case PRINT_BY_CHAR: 52 | case PRINT_FILENAME: 53 | token.command_arg_type = DONT_USES_ARG; 54 | break; 55 | case SET_CUSTOM_PROMPT: 56 | case PRINT_NUMBERED_LINES: 57 | case SET_FILENAME: 58 | case WRITE_BUF: 59 | case WRITE_BUF_APPEND: 60 | case FILL_BUF: 61 | case FILL_BUF_NL: 62 | case DELETE_LINE: 63 | case DELETE_LINES_IN_RANGE: 64 | token.command_arg_type = USES_A_FEW_SMALL_ARGS; 65 | break; 66 | case INSERT_AFTER: 67 | case INSERT_AFTER_NL: 68 | case INSERT_BEFORE: 69 | case INSERT_BEFORE_NL: 70 | token.command_arg_type = USES_ONE_BIG_ARG; 71 | break; 72 | case UNKNOWN_TYPE: 73 | default: 74 | //warning(stderr, "err: unknown type"); 75 | break; 76 | } 77 | 78 | return token; 79 | } 80 | 81 | tokens_t parse_command(const char* const input_buffer) 82 | { 83 | tokens_t command_token = { UNKNOWN_TYPE, UNKNOWN_TOKEN }; 84 | char* command_without_args = NULL; 85 | char* local_input_buffer = NULL; 86 | char* first_arg_ptr = NULL; 87 | char* second_arg_ptr = NULL; 88 | const char* big_arg_ptr = NULL; 89 | size_t first_arg_size; 90 | size_t second_arg_size; 91 | size_t big_arg_size; 92 | size_t local_input_buffer_size; 93 | 94 | local_input_buffer_size = strlen(input_buffer) + 1; 95 | 96 | local_input_buffer = alloc_buffer(local_input_buffer_size); 97 | strncpy(local_input_buffer, input_buffer, local_input_buffer_size); 98 | 99 | command_without_args = strtok(local_input_buffer, " \t\n"); 100 | command_token = get_command_token(command_without_args); 101 | 102 | if(command_token.command_arg_type == USES_A_FEW_SMALL_ARGS) { 103 | first_arg_ptr = strtok(NULL, " \t\n"); 104 | second_arg_ptr = strtok(NULL, " \t\n"); 105 | 106 | if(first_arg_ptr != NULL) { 107 | first_arg_size = strlen(first_arg_ptr) + 1; 108 | first_small_argument_pointer = alloc_buffer(first_arg_size); 109 | 110 | strncpy(first_small_argument_pointer, first_arg_ptr, first_arg_size); 111 | 112 | if(second_arg_ptr != NULL) { 113 | second_arg_size = strlen(second_arg_ptr) + 1; 114 | second_small_argument_pointer = alloc_buffer(second_arg_size); 115 | 116 | strncpy(second_small_argument_pointer, second_arg_ptr, second_arg_size); 117 | } 118 | } 119 | } else if(command_token.command_arg_type == USES_ONE_BIG_ARG) { 120 | big_arg_ptr = input_buffer + strlen(command_without_args) + 1; 121 | big_arg_size = strlen(big_arg_ptr) + 1; 122 | 123 | one_big_argument_pointer = alloc_buffer(big_arg_size); 124 | strncpy(one_big_argument_pointer, big_arg_ptr, big_arg_size); 125 | } else { 126 | if(command_token.command_arg_type != DONT_USES_ARG) { 127 | //warning(stderr, "error: unknown type of argument for command\n"); 128 | free(local_input_buffer); 129 | return command_token; 130 | } 131 | } 132 | 133 | free(local_input_buffer); 134 | return command_token; 135 | } 136 | 137 | void free_argument_pointers(void) { 138 | free(first_small_argument_pointer); first_small_argument_pointer = NULL; 139 | free(second_small_argument_pointer); second_small_argument_pointer = NULL; 140 | free(one_big_argument_pointer); one_big_argument_pointer = NULL; 141 | } 142 | -------------------------------------------------------------------------------- /src/delete.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include "main.h" 7 | #include "misc.h" 8 | #include "buffer.h" 9 | 10 | static char* delete(size_t position1, size_t position2) 11 | { 12 | char* temp_buffer = NULL; 13 | size_t start_position; 14 | size_t end_position; 15 | size_t bufsize; 16 | size_t temp_bufsize; 17 | 18 | if((bufsize = get_buffer_size(global_buffer)) == 0) { 19 | return NULL; 20 | } 21 | 22 | if(position1 < position2 && position1 < (bufsize - 1)) { 23 | start_position = position1; 24 | } else { 25 | //warning(stderr, "warning: invalid position1\n"); 26 | return NULL; 27 | } 28 | 29 | if(position2 > 0 && position2 > position1 && position2 < bufsize) { 30 | end_position = position2; 31 | } else { 32 | //warning(stderr, "warning: invalid position2\n"); 33 | return NULL; 34 | } 35 | 36 | temp_bufsize = bufsize - (end_position - start_position); 37 | if(temp_bufsize > 0) { 38 | temp_buffer = alloc_buffer(temp_bufsize); 39 | } else { 40 | free(global_buffer); 41 | free(temp_buffer); 42 | global_buffer = NULL; 43 | is_data_saved = true; 44 | return NULL; 45 | } 46 | 47 | strncpy(temp_buffer, global_buffer, start_position); 48 | if(end_position == bufsize - 1) { 49 | if(start_position != 0) { 50 | temp_buffer[start_position - 1] = '\0'; 51 | } else { 52 | strncpy(temp_buffer, global_buffer + end_position, bufsize - end_position); 53 | } 54 | } else { 55 | strncpy(temp_buffer + start_position, global_buffer + end_position, bufsize - end_position); 56 | } 57 | 58 | free(global_buffer); 59 | global_buffer = alloc_buffer(temp_bufsize); 60 | strncpy(global_buffer, temp_buffer, temp_bufsize); 61 | 62 | free(temp_buffer); 63 | is_data_saved = false; 64 | return global_buffer; 65 | } 66 | 67 | void delete_line(size_t line_number) 68 | { 69 | size_t number_of_lines; 70 | size_t position1; 71 | size_t position2; 72 | bool is_err = false; 73 | 74 | number_of_lines = get_number_of_lines(global_buffer); 75 | 76 | if(line_number < 1 || line_number > number_of_lines) { 77 | printf("out of lines\n"); 78 | return; 79 | } 80 | 81 | // handling the last line in the buffer 82 | if(line_number == 1 && number_of_lines == 1) { 83 | free(global_buffer); 84 | global_buffer = NULL; 85 | is_data_saved = true; 86 | return; 87 | } 88 | 89 | position1 = get_position_at_line(global_buffer, line_number, &is_err); 90 | if(is_err) { 91 | warning(stderr, "warning: get_number_of_lines() failed\n"); 92 | return; 93 | } 94 | 95 | if(line_number == number_of_lines) { 96 | position2 = get_buffer_size(global_buffer) - 1; 97 | } else { 98 | position2 = get_position_at_line(global_buffer, line_number + 1, &is_err); 99 | if(is_err) { 100 | warning(stderr, "warning: get_number_of_lines() failed\n"); 101 | return; 102 | } 103 | } 104 | 105 | if(delete(position1, position2) == NULL) { 106 | warning(stderr, "warning: delete() failed\n"); 107 | } 108 | } 109 | 110 | void delete_range_of_lines(const char* const line1_start, const char* const line2_end) 111 | { 112 | if(line1_start == NULL || line2_end == NULL) { 113 | warning(stderr, "warning: null lines pointers\n"); 114 | return; 115 | } 116 | 117 | if(!global_buffer) { 118 | printf("buffer is empty\n"); 119 | return; 120 | } 121 | 122 | size_t number_of_lines; 123 | size_t start_line; 124 | size_t end_line; 125 | size_t start_line_position; 126 | size_t end_line_position; 127 | bool is_err = false; 128 | 129 | number_of_lines = get_number_of_lines(global_buffer); 130 | 131 | start_line = get_number(line1_start); 132 | end_line = get_number(line2_end); 133 | 134 | if(start_line > 0 && end_line <= number_of_lines) { 135 | if(start_line > end_line) { 136 | printf("invalid range(%zd-%zd)\n", start_line, end_line); 137 | return; 138 | } 139 | } else { 140 | printf("out of lines\n"); 141 | return; 142 | } 143 | 144 | if(start_line == end_line) { 145 | delete_line(start_line); 146 | } else { 147 | if(start_line == 0) { 148 | start_line_position = 0; 149 | } else { 150 | start_line_position = get_position_at_line(global_buffer, start_line, &is_err); 151 | if(is_err) { 152 | warning(stderr, "warning: get_number_of_lines() failed\n"); 153 | return; 154 | } 155 | } 156 | 157 | if(end_line == number_of_lines) { 158 | end_line_position = get_buffer_size(global_buffer); 159 | } else { 160 | end_line_position = get_position_at_line(global_buffer, end_line + 1, &is_err); 161 | if(is_err) { 162 | warning(stderr, "warning: get_number_of_lines() failed\n"); 163 | return; 164 | } 165 | } 166 | 167 | if(start_line_position == 0 && end_line_position == get_buffer_size(global_buffer)) { 168 | clean_buffer(); 169 | } else { 170 | if(end_line == number_of_lines - 1) { 171 | end_line_position++; 172 | } 173 | if(delete(start_line_position, end_line_position - 1) == NULL) { // -1 because '\0' 174 | warning(stderr, "warning: delete() failed\n"); 175 | return; 176 | } 177 | } 178 | } 179 | } 180 | -------------------------------------------------------------------------------- /src/buffer.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include "misc.h" 7 | #include "main.h" 8 | #include "buffer.h" 9 | 10 | char* alloc_buffer(size_t size) 11 | { 12 | char* buffer = malloc(size); 13 | if(!buffer) { 14 | fail(stderr, "error: allocation error for new buffer\n"); 15 | } 16 | return buffer; 17 | } 18 | 19 | char* realloc_buffer(char* buffer, size_t old_size, size_t new_data_size) 20 | { 21 | buffer = realloc(buffer, old_size + new_data_size); 22 | if(!buffer) { 23 | fail(stderr, "error: reallocation error for buffer\n"); 24 | } 25 | return buffer; 26 | } 27 | 28 | size_t get_buffer_size(const char* const buffer) 29 | { 30 | if(buffer) { 31 | return strlen(buffer) + 1; 32 | } 33 | return 0; 34 | } 35 | 36 | size_t get_number_of_lines(const char* const buffer) 37 | { 38 | size_t new_line_counter = 1; 39 | size_t count; 40 | size_t bufsize; 41 | 42 | if((bufsize = get_buffer_size(buffer)) == 0) { 43 | //warning(stderr, "buffer is empty\n"); 44 | return bufsize; 45 | } 46 | 47 | for(count = 0; count < bufsize; count++) { 48 | if(buffer[count] == '\n') { 49 | new_line_counter++; 50 | } 51 | } 52 | 53 | return new_line_counter; 54 | } 55 | 56 | size_t get_position_at_line(const char* const buffer, size_t line_number, bool *is_err) 57 | { 58 | size_t new_line_counter = 1; 59 | size_t count; 60 | size_t bufsize; 61 | 62 | if((bufsize = get_buffer_size(buffer)) == 0) { 63 | *is_err = true; 64 | return 0; 65 | } 66 | 67 | for(count = 0; count < bufsize; count++) { 68 | if(new_line_counter == line_number) { 69 | return count; 70 | } 71 | if(buffer[count] == '\n') { 72 | new_line_counter++; 73 | } 74 | } 75 | 76 | *is_err = true; 77 | return 0; 78 | } 79 | 80 | void clean_buffer(void) 81 | { 82 | if(global_buffer != NULL) { 83 | printf("freed memory: %zd bytes\n", get_buffer_size(global_buffer)); 84 | free(global_buffer); 85 | global_buffer = NULL; 86 | } else { 87 | printf("buffer is empty\n"); 88 | } 89 | 90 | is_data_saved = true; 91 | } 92 | 93 | void print_buffer(const char* const buffer, char* line, uint8_t numbered_lines_flag) 94 | { 95 | size_t count_lines = 1; 96 | size_t number_of_lines; 97 | size_t line_position; 98 | size_t line_position2; 99 | size_t line_number; 100 | bool is_err = false; 101 | 102 | number_of_lines = get_number_of_lines(buffer); 103 | 104 | if(!buffer) { 105 | printf("buffer is empty\n"); 106 | return; 107 | } else { 108 | if(line != NULL) { 109 | line_number = get_number(line); 110 | 111 | if((line_number < 1) || (line_number > number_of_lines)) { 112 | printf("warninig: out of lines\n"); 113 | return; 114 | } 115 | 116 | line_position = get_position_at_line(buffer, line_number, &is_err); 117 | if(is_err) { 118 | warning(stderr, "warning: get_position_at_line() failed\n"); 119 | return; 120 | } 121 | 122 | if(line_number == number_of_lines) { 123 | line_position2 = get_buffer_size(buffer); 124 | } else { 125 | line_position2 = get_position_at_line(buffer, line_number + 1, &is_err); 126 | if(is_err) { 127 | warning(stderr, "warning: get_position_at_line() failed\n"); 128 | return; 129 | } 130 | } 131 | 132 | for(size_t i = line_position; i < line_position2; i++) { 133 | if(buffer[i] != '\n') { 134 | putchar(buffer[i]); 135 | } 136 | } 137 | putchar('\n'); 138 | } else if(numbered_lines_flag == OUTPUT_NUMBERED_LINES) { 139 | if(number_of_lines < 10) { 140 | printf("%ld ", count_lines); 141 | } else if(number_of_lines >= 10 && number_of_lines < 100) { 142 | printf("%2ld ", count_lines); 143 | } else if(number_of_lines >= 100 && number_of_lines < 1000) { 144 | printf("%3ld ", count_lines); 145 | } else if(number_of_lines >= 1000 && number_of_lines < 10000) { 146 | printf("%4ld ", count_lines); 147 | } 148 | 149 | count_lines++; 150 | 151 | for(size_t i = 0; i < strlen(buffer); i++) { 152 | putchar(buffer[i]); 153 | 154 | if(buffer[i] == '\n') { 155 | if(number_of_lines < 10) { 156 | printf("%1ld ", count_lines); 157 | } else if(number_of_lines >= 10 && number_of_lines < 100) { 158 | printf("%2ld ", count_lines); 159 | } else if(number_of_lines >= 100 && number_of_lines < 1000) { 160 | printf("%3ld ", count_lines); 161 | } else if(number_of_lines >= 100 && number_of_lines < 10000) { 162 | printf("%4ld ", count_lines); 163 | } 164 | count_lines++; 165 | } 166 | } 167 | putchar('\n'); 168 | } else { 169 | printf("%s\n", buffer); 170 | } 171 | } 172 | } 173 | 174 | void print_buffer_by_char(const char* const buffer) 175 | { 176 | if(!buffer) { 177 | printf("buffer is empty\n"); 178 | return; 179 | } 180 | 181 | for(size_t i = 0; i < strlen(buffer) + 1; i++) { 182 | if(buffer[i] == '\0') { 183 | printf("\'\\0\'\n"); 184 | break; 185 | } else if(buffer[i] == '\n') { 186 | printf("\'\\n\'\n"); 187 | } else { 188 | printf("\'%c\' ", buffer[i]); 189 | } 190 | } 191 | } 192 | 193 | void free_buffer_pointers(void) { 194 | free(global_filename); global_filename = NULL; 195 | free(global_buffer); global_buffer = NULL; 196 | } 197 | -------------------------------------------------------------------------------- /src/insert.c: -------------------------------------------------------------------------------- 1 | #define _GNU_SOURCE 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include "buffer.h" 9 | #include "main.h" 10 | #include "io.h" 11 | #include "misc.h" 12 | 13 | static bool check_for_correct_arguments(const char* const argument) 14 | { 15 | if(argument == NULL) { 16 | return false; 17 | } 18 | 19 | size_t i = 0; 20 | size_t size; 21 | 22 | size = strlen(argument) + 1; 23 | 24 | if(!isdigit(argument[i])) { 25 | return false; 26 | } 27 | 28 | for(; i < size; i++) { 29 | if(!isdigit(argument[i])) { 30 | break; 31 | } 32 | } 33 | 34 | if(!isspace(argument[i])) { 35 | return false; 36 | } 37 | 38 | return true; 39 | } 40 | 41 | static char* get_tokens_from_argument(const char* const argument, size_t *line_num_pointer) 42 | { 43 | size_t temp_data_len; 44 | size_t line_number; 45 | char* line = NULL; 46 | char* data = NULL; 47 | char* temp_string = NULL; 48 | const char* temp_data = NULL; 49 | 50 | if(check_for_correct_arguments(argument) == false) 51 | return NULL; 52 | 53 | temp_string = strdup(argument); 54 | 55 | line = strtok(temp_string, " "); 56 | line_number = get_number(line); 57 | *line_num_pointer = line_number; 58 | 59 | temp_data = argument + strlen(line) + 1; 60 | temp_data_len = strlen(temp_data) + 1; 61 | 62 | data = alloc_buffer(temp_data_len); 63 | 64 | strncpy(data, temp_data, temp_data_len); 65 | free(temp_string); 66 | return data; 67 | } 68 | 69 | static char* insert(size_t position, char* data, int new_line_flag) 70 | { 71 | if(data == NULL) { 72 | warning(stderr, "warning: null data pointer\n"); 73 | return NULL; 74 | } 75 | 76 | size_t data_length; 77 | size_t buffer_length; 78 | char* temp_buffer = NULL; 79 | 80 | data_length = strlen(data) + 1; 81 | 82 | if(!global_buffer) { 83 | buffer_length = get_buffer_size(global_buffer); 84 | 85 | if(position >= buffer_length) { 86 | warning(stderr, "warning: out of buffer\n"); 87 | return NULL; 88 | } 89 | 90 | if(new_line_flag != DONT_SKIP_NEW_LINE) { 91 | data_length--; 92 | } 93 | 94 | temp_buffer = alloc_buffer(buffer_length + data_length); 95 | 96 | strncpy(temp_buffer, global_buffer, position); 97 | strncpy(temp_buffer + position, data, data_length); 98 | strncpy(temp_buffer + position + data_length, global_buffer + position, buffer_length - position); 99 | 100 | if(new_line_flag == DONT_SKIP_NEW_LINE) { 101 | temp_buffer[position + data_length - 1] = '\n'; 102 | } 103 | 104 | free(global_buffer); 105 | global_buffer = alloc_buffer(data_length + buffer_length); 106 | strncpy(global_buffer, temp_buffer, data_length + buffer_length); 107 | free(temp_buffer); 108 | } else { 109 | global_buffer = alloc_buffer(data_length); 110 | strncpy(global_buffer, data, data_length); 111 | } 112 | 113 | free(data); 114 | is_data_saved = false; 115 | return global_buffer; 116 | } 117 | 118 | void insert_after(const char* const data, int new_line_flag) 119 | { 120 | size_t number_of_lines; 121 | size_t position; 122 | size_t line_number = 0; 123 | char* data_pointer = NULL; 124 | bool is_err = false; 125 | 126 | number_of_lines = get_number_of_lines(global_buffer); 127 | data_pointer = get_tokens_from_argument(data, &line_number); 128 | if(data_pointer == NULL) { 129 | warning(stderr, "warning: invaid arguments\n"); 130 | return; 131 | } 132 | 133 | if(line_number > number_of_lines) { 134 | printf("out of lines\n"); 135 | free(data_pointer); 136 | return; 137 | } 138 | 139 | if(line_number == number_of_lines) { 140 | if(line_number == 0) { 141 | position = 0; 142 | } else { 143 | position = get_buffer_size(global_buffer) - 1; 144 | } 145 | } else { 146 | position = get_position_at_line(global_buffer, line_number + 1, &is_err); 147 | if(is_err) 148 | { 149 | warning(stderr, "warning: get_position_at_line() failed\n"); 150 | free(data_pointer); 151 | return; 152 | } 153 | } 154 | 155 | if(insert(position, data_pointer, new_line_flag) == NULL) { 156 | warning(stderr, "warning: insert() failed\n"); 157 | return; 158 | } 159 | 160 | is_data_saved = false; 161 | return; 162 | } 163 | 164 | void insert_before(const char* const data, int new_line_flag) 165 | { 166 | size_t number_of_lines; 167 | size_t position = 0; 168 | size_t line_number = 0; 169 | char* data_pointer = NULL; 170 | bool is_err = false; 171 | 172 | number_of_lines = get_number_of_lines(global_buffer); 173 | data_pointer = get_tokens_from_argument(data, &line_number); 174 | if(data_pointer == NULL) { 175 | warning(stderr, "warning: invalid arguments\n"); 176 | return; 177 | } 178 | 179 | if(line_number < 1 || line_number > number_of_lines) { 180 | printf("out of lines\n"); 181 | free(data_pointer); 182 | return; 183 | } 184 | 185 | if(line_number <= number_of_lines) { 186 | if(line_number == 0) { 187 | position = 0; 188 | } else { 189 | position = get_position_at_line(global_buffer, line_number, &is_err); 190 | if(is_err) 191 | { 192 | free(data_pointer); 193 | warning(stderr, "warning: get_position_at_line() failed\n"); 194 | return; 195 | } 196 | } 197 | } 198 | 199 | if(insert(position, data_pointer, new_line_flag) == NULL) { 200 | warning(stderr, "warning: insert() failed\n"); 201 | return; 202 | } 203 | 204 | is_data_saved = false; 205 | return; 206 | } 207 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------