refactor

1 files changed, 0 insertions, 917 deletions

diff --git a/src/commands/ed.c b/src/commands/ed.c
deleted file mode 100644
index d7e8881..0000000
--- a/src/commands/ed.c
+++ /dev/null
@@ -1,917 +0,0 @@
-#include "../command.h"
-#include "../util//regex.h"
-
-#define INPUT_LEN 1024
-
-static char** lines = NULL;
-static unsigned long line_capacity;
-static unsigned long line_count;
-static unsigned long line_current;
-static bool pending_writes;
-static char* default_filename = NULL;
-static re_t last_regex = NULL;
-
-enum LineAddressType {
-    INDEX,
-    RANGE,
-    SET,
-    FREE
-};
-
-struct LineAddress {
-    enum LineAddressType type;
-    union {
-        struct {
-            long int i;
-        } index;
-        struct {
-            long int a;
-            long int b;
-        } range;
-        struct {
-            long int* b;
-            unsigned long c;
-            unsigned long s;
-        } set;
-    } data;
-    bool empty;
-};
-
-enum RegexDirection {
-    BEFORE,
-    AFTER,
-    ALL
-};
-
-static bool read_regex(char** end, re_t* regex, enum RegexDirection dir) {
-    char c;
-    char* index = *end;
-    char* regex_str = index;
-    while(true) {
-        c = *(index++);
-        if (c == '\0') {
-            error_s("missing regex after %c\n", dir == BEFORE ? '?' : '/');
-            return false;
-        }
-        if (c == (dir == BEFORE ? '?' : '/')) {
-            *(index - 1) = '\0';
-            break;
-        }
-    }
-    *regex = re_compile(regex_str);
-    last_regex = *regex;
-    *end = index;
-    return true;
-}
-
-static bool parse_regex(char** end, struct LineAddress* address, enum RegexDirection dir) {
-    re_t regex;
-    unsigned long cap, siz, i, until;
-    long int* buf;
-
-    if (!read_regex(end, &regex, dir)) return false;
-
-    cap = 8;
-    siz = 0;
-    buf = malloc(cap * sizeof(long int));
-
-    i = (dir == ALL ? 0 : line_current);
-    until = (dir == BEFORE ? 0 : line_count - 1);
-    for (; (dir == BEFORE ? i >= until : i < until); dir == BEFORE ? i-- : i++) {
-        int len;
-        if (re_matchp(regex, lines[i], &len) == -1) {
-            if (dir == BEFORE && i == 0) break;
-            continue;
-        }
-        if (cap == siz) {
-            cap *= 2;
-            buf = realloc(buf, cap * sizeof(long int));
-        }
-        buf[siz] = i;
-        siz++;
-        if (dir == BEFORE && i == 0) break;
-    }
-
-    address->empty = false;
-    address->type = SET;
-    address->data.set.s = siz;
-    address->data.set.c = cap;
-    address->data.set.b = buf;
-    return true;
-}
-
-static void free_address (struct LineAddress address) {
-    if (address.type != SET) return;
-    address.type = FREE;
-    free(address.data.set.b);
-}
-
-static void expand_buffer(long int** buf, unsigned long* cap, unsigned long* size) {
-    if (*cap == *size) {
-        *cap *= 2;
-        *buf = realloc(*buf, sizeof(long int) * *cap);
-    }
-}
-
-static bool parse_regex_lines(char** end, struct LineAddress* address) {
-    re_t regex;
-    unsigned long cap, siz;
-    long int* buf;
-    int len;
-    struct LineAddress addr;
-
-    if (!read_regex(end, &regex, ALL)) return false;
-
-    cap = 8;
-    siz = 0;
-    buf = malloc(cap * sizeof(long int));
-
-    addr = *address;
-    if (addr.type == INDEX) {
-        if (re_matchp(regex, lines[addr.data.index.i], &len) != -1) {
-            buf[0] = addr.data.index.i;
-            siz = 1;
-        }
-    } else if (addr.type == RANGE) {
-        long int i;
-        for (i = addr.data.range.a; i < addr.data.range.b; i++) {
-            if (re_matchp(regex, lines[i], &len) == -1) continue;
-            expand_buffer(&buf, &cap, &siz);
-            buf[siz] = i;
-            siz++;
-        }
-    } else if (addr.type == SET) {
-        unsigned long i;
-        for (i = 0; i < addr.data.set.s; i++) {
-            if (re_matchp(regex, lines[addr.data.set.b[i]], &len) == -1) continue;
-            expand_buffer(&buf, &cap, &siz);
-            buf[siz] = addr.data.set.b[i];
-            siz++;
-        }
-    }
-
-    free_address(*address);
-    address->empty = false;
-    address->type = SET;
-    address->data.set.s = siz;
-    address->data.set.c = cap;
-    address->data.set.b = buf;
-    return true;
-}
-
-static bool read_address(char** command, bool whitespace, struct LineAddress* a) {
-    char* index = *command;
-    struct LineAddress address;
-
-    char* end_pre;
-    long int n_pre;
-    char pre;
-
-    memset(&address, 0, sizeof(struct LineAddress));
-    
-    address.empty = false;
-    if (strlen(*command) < 1) {
-        address.type = INDEX;
-        address.data.index.i = line_current + 1;
-        if (line_current >= line_count) line_current = line_count - 1;
-        *a = address;
-        return true;
-    }
-
-    n_pre = strtol(index, &end_pre, 10) - 1;
-    if (end_pre == index) {
-        n_pre = -1;
-    } else {
-        if (n_pre < 0) {
-            error_s("input cannot be negative\n");
-            return false;
-        }
-        index = end_pre;
-    }
-    
-    pre = *(index++);
-    switch (pre) {
-        case '.':
-            address.type = INDEX;
-            address.data.index.i = line_current;
-            break;
-        case '$':
-            address.type = INDEX;
-            address.data.index.i = line_count - 1;
-            break;
-        case '-':
-        case '^': {
-            char* end;
-            long int n;
-
-            address.type = INDEX;
-            n = strtol(index, &end, 10) - 1;
-
-            if (n < 0) {
-                error_s("input cannot be negative\n");
-                return false;
-            }
-
-            if (index == end) {
-                address.data.index.i = line_current - 1;
-            } else {
-                address.data.index.i = line_current - n;
-            }
-
-            if (address.data.index.i < 0) {
-                error_s("line number %ld does not exist\n", address.data.index.i + 1);
-                return false;
-            }
-
-            break;
-        }
-        case '+': {
-            char* end;
-            long int n;
-
-            address.type = INDEX;
-            n = strtol(index, &end, 10) - 1;
-
-            if (n < 0) {
-                error_s("input cannot be negative\n");
-                return false;
-            }
-            if (index == end) {
-                address.data.index.i = line_current + 1;
-            } else {
-                address.data.index.i = line_current + n;
-            }
-            if (address.data.index.i >= (long int) line_count) {
-                error_s("line number %ld does not exist\n", address.data.index.i + 1);
-                return false;
-            }
-            break;
-        }
-        case '%':
-            address.type = RANGE;
-            address.data.range.a = 0;
-            address.data.range.b = line_count - 1;
-            break;
-        case ';':
-            address.type = RANGE;
-            address.data.range.a = line_current;
-            address.data.range.b = line_count - 1;
-            break;
-        case '/': 
-            if (!parse_regex(&index, &address, AFTER)) return false;
-            break;
-        case '?':
-            if (!parse_regex(&index, &address, BEFORE)) return false;
-            break;
-        default: {
-            index--;
-            if (n_pre == -1) {
-                address.type = INDEX;
-                address.data.index.i = line_current;
-                address.empty = true;
-                break;
-            } else if (whitespace) {
-                address.type = INDEX;
-                address.data.index.i = line_current + n_pre;
-            } else {
-                address.type = INDEX;
-                address.data.index.i = n_pre;
-            }
-            if (address.data.index.i < 0 || address.data.index.i >= (long int) line_count) {
-                error_s("line number %ld does not exist\n", address.data.index.i + 1);
-                return false;
-            }
-        }
-    }
-    *command = index;
-    *a = address;
-    return true;
-}
-
-static void free_data(bool all) {
-    if (lines != NULL) {
-        unsigned long i;
-        for (i = 0; i < line_count; i++) {
-            free(lines[i]);
-        }
-        free(lines);
-        lines = NULL;
-    }
-    if (all && default_filename != NULL) {
-        free(default_filename);
-        default_filename = NULL;
-    }
-}
-
-static void load_empty(void) {
-    free_data(false);
-
-    line_capacity = 8;
-    lines = malloc(sizeof(char*) * line_capacity);
-
-    line_count = 0;
-    line_current = 0;
-    pending_writes = false;
-}
-
-static void get_input(FILE* file, char*** buffer, unsigned long* capacity, unsigned long* size) {
-    unsigned long cap = 8;
-    unsigned long siz = 0;
-    char** buf = malloc(sizeof(char*) * cap);
-
-    char* line = NULL;
-    size_t offset = 0;
-    
-    clearerr(stdin);
-    while (getline(&line, &offset, file) != -1) {
-        if (cap == siz) {
-            cap *= 2;
-            buf = realloc(buf, sizeof(char*) * cap);
-        }
-        buf[siz] = line;
-        siz++;
-        line = NULL;
-    }
-
-    free(line);
-
-    *buffer = buf;
-    *capacity = cap;
-    *size = siz;
-}
-
-int ed_getline(char *buf, size_t size) {
-    size_t i = 0;
-    int ch;
-    clearerr(stdin);
-    while ((ch = getchar()) != EOF) {  /* Read until EOF ... */
-        if (i + 1 < size) {
-            buf[i++] = ch;
-        }
-        if (ch == '\n') {  /* ... or end of line */
-            break;  
-        }
-    } 
-    buf[i] = '\0';
-    if (i == 0) { 
-        return EOF;
-    }
-    return i;
-}
-
-static void load_file(FILE* file) {
-    free_data(false);
-    line_current = 0;
-    get_input(file, &lines, &line_capacity, &line_count);
-    if (file != stdin)
-        fclose(file);
-    
-}
-
-static bool check_if_sure(char* prompt) {
-    char buf[INPUT_LEN];
-
-    if (!pending_writes) {
-        return true;
-    }
-
-    printf("%s", prompt);
-    fflush(stdout);
-
-    if (ed_getline(buf, INPUT_LEN) == EOF) {
-        putchar('\n');
-        return false;
-    }
-
-    return prefix("y", buf);
-}
-
-static bool skip_whitespace(char** index) {
-    char c;
-    bool w = false;
-    while (c = **index, c == ' ' || c == '\t') { (*index)++; w = true; }
-    return w;
-}
-
-static void expand(unsigned long count) {
-    if (count < line_capacity) return;
-    line_capacity *= 2;
-    if (count > line_capacity) line_capacity = count;
-    lines = realloc(lines, line_capacity * sizeof(char*));
-}
-
-static void append_lines(unsigned long index, char** new, unsigned long new_len) {
-    if (new_len < 1) return;
-    pending_writes = true;
-    expand(line_count + new_len);
-    if (index + 1 <= line_count)
-        memmove(&lines[index+new_len], &lines[index], sizeof(char*) * (line_count - index));
-    memcpy(&lines[index], new, sizeof(char*) * new_len);
-    line_count += new_len;
-}
-
-static void delete_lines(unsigned long a, unsigned long b) {
-    unsigned long i;
-
-    if (b < a) return;
-    pending_writes = true;
-    
-    for (i = a; i <= b; i++) {
-        free(lines[i]);
-    }
-    if (b == line_count - 1) {
-        line_count = a;
-        return;
-    }
-    memmove(&lines[a], &lines[b+1], sizeof(char*) * (line_count - (b + 1)));
-    line_count -= (b - a) + 1;
-    line_current = a;
-    if (line_current >= line_count) line_current = line_count - 1;
-}
-
-static bool handle_append(struct LineAddress* address) {
-    char** buf;
-    unsigned long cap, size;
-
-    if (address->type != INDEX) {
-        error_s("append command requires index addressing\n");
-        return false;
-    }
-    
-    if (line_count == 0) {
-        address->data.index.i = -1;
-    }
-    
-    get_input(stdin, &buf, &cap, &size);
-    
-    if (size > 0) {
-        append_lines(address->data.index.i + 1, buf, size);
-        printf("ed: appened %lu lines\n", size);
-    }
-    
-    line_current += size;
-    free(buf);
-    return true;
-}
-
-static bool handle_delete(struct LineAddress* address) {
-    if (address->empty && address->data.index.i >= (long int) line_count) {
-        error_s("line number %ld does not exist\n", address->data.index.i + 1);
-        return false;
-    }
-
-    if (address->type == INDEX) {
-        delete_lines(address->data.index.i, address->data.index.i);
-        output("deleted line %ld\n", address->data.index.i+1);
-    } else if (address->type == RANGE) {
-        delete_lines(address->data.range.a, address->data.range.b);
-        output("deleted lines %ld-%ld\n", address->data.range.a+1, address->data.range.b+1);
-    } else if (address->type == SET) {
-        unsigned long i;
-        for (i = 0; i < address->data.set.s; i++) {
-            delete_lines(address->data.set.b[i], address->data.set.b[i]);
-        }
-        output("deleted %lu lines\n", address->data.set.s);
-    }
-    
-    return true;
-}
-
-static bool get_file_name(char** filename) {
-    size_t len = strlen(*filename);
-
-    if (len < 1 || (len == 1 && **filename == '\n')) {
-        if (default_filename == NULL) {
-            error_s("no default filename specified\n");
-            return false;
-        }
-        *filename = default_filename;
-    } else {
-        if ((*filename)[len - 1] == '\n') {
-            (*filename)[len - 1] = '\0';
-            len--;
-        }
-        if (default_filename != NULL) {
-            default_filename = realloc(default_filename, len + 1);
-        } else {
-            default_filename = malloc(len + 1);
-        }
-        memcpy(default_filename, *filename, len + 1);
-        *filename = default_filename;
-    }
-    return true;
-}
-
-static void write_file(char* filename, struct LineAddress* address, char* type) {
-    FILE* file;
-    int wrote;
-
-    if (line_count < 1) {
-        error_s("cannot write empty file\n");
-        return;
-    }
-    
-    if (!get_file_name(&filename)) return;
-    file = get_file_s(filename, type);
-    if (file == NULL) return;
-    
-    wrote = 0;
-    
-    if (address->empty) {
-        unsigned long i;
-        for (i = 0; i < line_count; i++) {
-            fprintf(file, "%s", lines[i]); 
-            wrote++;
-        }
-    } else if (address->type == INDEX) {
-        long int i = address->data.index.i;
-        fprintf(file, "%s", lines[i]); 
-        wrote++;
-    } else if (address->type == RANGE) {
-        long int i;
-        for (i = address->data.range.a; i < address->data.range.b; i++) {
-            fprintf(file, "%s", lines[i]); 
-            wrote++;
-        }
-    } else if (address->type == SET) {
-        unsigned long i;
-        for (i = 0; i < address->data.set.s; i++) {
-            fprintf(file, "%s", lines[address->data.set.b[i]]);
-            wrote++;
-        }
-    }
-
-    pending_writes = false;
-    fclose(file);
-    output("wrote %d lines from %s\n", wrote, filename);
-}
-
-static void read_file(char* filename) {
-    FILE* file;
-    char** buf;
-    long int line;
-    unsigned long capacity, size;
-
-    if (!get_file_name(&filename)) return;
-    file = get_file_s(filename, "r");
-    if (file == NULL) return;
-
-    capacity = 8;
-    size = 0;
-    buf = malloc(capacity * sizeof(char*));
-    get_input(file, &buf, &capacity, &size);
-
-    if (size < 1) {
-        free(buf);
-        error_s("attempted to read a empty file\n");
-        return;
-    }
-
-    line = -1;
-    if (line_count > 0) {
-        line = line_count - 1;
-    }
-
-    append_lines(line, buf, size);
-    free(buf);
-    output("read and appended %lu lines from %s\n", size, filename);
-}
-
-static void expand_string(char** buf, int* capacity, int* size, char* text, int len) {
-    if (*size + len >= *capacity) {
-        *capacity *= 2;
-        if (*capacity < *size + len) *capacity = *size + len;
-        *buf = realloc(*buf, *capacity);
-    }
-    memcpy(*buf + *size, text, len);
-    *size += len;
-}
-
-static int substute_string(long int index, long int matches, re_t regex, char* sub, int sub_len) {
-    int capacity = 8;
-    int size = 0;
-    char* buf = malloc(sizeof(char) * capacity);
-    long int left;
-
-    int offset = 0;
-    int matches_found = 0;
-    while(true) {
-        int distance, len;
-        
-        if (lines[index][offset] == '\0') break;
-        
-        if (matches_found >= matches && matches > 0) break;
-        
-        if ((distance = re_matchp(regex, &lines[index][offset], &len)) == -1) {
-            break;
-        }
-        
-        if (distance > 0) {
-            expand_string(&buf, &capacity, &size, &lines[index][offset], distance);
-        }
-
-        expand_string(&buf, &capacity, &size, sub, sub_len);
-        offset += len + distance;
-        matches_found++;
-    }
-
-    left = strlen(lines[index] + offset);
-    expand_string(&buf, &capacity, &size, &lines[index][offset], left + 1);
-
-    free(lines[index]);
-    lines[index] = buf;
-    return matches_found;
-}
-
-static void prompt(void) {
-    char buf[INPUT_LEN];
-    char* index;
-    char cmd;
-    bool whitespace, linenumbers;
-    struct LineAddress address;
-    
-    printf(": ");
-    fflush(stdout);
-
-    if (ed_getline(buf, INPUT_LEN) == EOF) { putchar('\n'); return; }
-    if (buf[0] == '\0') { putchar('\n'); return; }
-
-    index = &buf[0];
-    whitespace = skip_whitespace(&index);
-
-    if (!read_address(&index, whitespace, &address)) return;
-
-    cmd = *(index++);
-    
-    if (cmd == ',') {
-        struct LineAddress address2;
-        
-        if (address.type != INDEX) {
-            error_s("comma range addressing requires two index addresses\n");
-            free_address(address);
-            return;
-        }
-        
-        whitespace = skip_whitespace(&index);
-        
-        if (!read_address(&index, whitespace, &address2)) {
-            free_address(address);
-            return;
-        }
-        
-        if (address2.type != INDEX) {
-            error_s("comma range addressing requires two index addresses\n");
-            free_address(address);
-            free_address(address2);
-            return;
-        }
-        
-        address.type = RANGE;
-        address.data.range.a = address.data.index.i; /* cursed */
-        address.data.range.b = address2.data.index.i;
-
-        cmd = *(index++);
-    }
-
-    if (address.type == RANGE && address.data.range.a > address.data.range.b) {
-        error_s("range addressing must be in ascending order\n");
-        free_address(address);
-        return;
-    }
-
-    linenumbers = false;
-
-test:
-    switch (cmd) {
-        case '\0':
-        case '\n':
-            if (address.empty) {
-                if (line_current == line_count) {
-                    error_s("line number %ld does not exist\n", line_current + 1);
-                    break;
-                } else if (line_current + 1 == line_count) {
-                    error_s("line number %ld does not exist\n", line_current + 2);
-                    break;
-                } else {
-                    line_current++;
-                }
-                printf("%s", lines[line_current]);
-                break;
-            }
-            if (address.type == INDEX) {
-                line_current = address.data.index.i;
-            } else if (address.type == RANGE) {
-                line_current = address.data.range.b;
-            } else if (address.type == SET) {
-                error_s("unexpected range addressing\n");
-                break;
-            }
-            printf("%s", lines[line_current]);
-            break;
-        case 'a':
-            handle_append(&address);
-            break;
-        case 'd':
-            handle_delete(&address);
-            break;
-        case 'c':
-            if (!handle_delete(&address)) { break; }
-            address.type = INDEX;
-            address.data.index.i = line_current - 1;
-            handle_append(&address);
-            break;
-        case 'n':
-            linenumbers = true;
-            __attribute__((fallthrough));
-        case 'p':
-            if (address.empty && address.data.index.i >= (long int) line_count) {
-                error_s("line number %ld does not exist\n", address.data.index.i + 1);
-                break;
-            }
-            if (address.type == INDEX) {
-                if (linenumbers) printf("%ld\t", address.data.index.i + 1);
-                printf("%s", lines[address.data.index.i]);
-            } else if (address.type == RANGE) {
-                long int i;
-                for (i = address.data.range.a; i <= address.data.range.b; i++) {
-                    if (linenumbers) printf("%ld\t", i + 1);
-                    printf("%s", lines[i]);
-                }
-            } else if (address.type == SET) {
-                unsigned long i;
-                for (i = 0; i < address.data.set.s; i++) {
-                    if (linenumbers) printf("%ld\t", address.data.set.b[i] +1);
-                    printf("%s", lines[address.data.set.b[i]]);
-                }
-            }
-            break;
-        case 'q':
-            if (!check_if_sure("Quit for sure? ")) break;
-            __attribute__((fallthrough));
-        case 'Q':
-            free_address(address);
-            free_data(true);
-            exit(EXIT_SUCCESS);
-            break;
-        case 'g':
-            skip_whitespace(&index);
-            free_address(address);
-            if (*(index++) != '/') {
-                error_s("unexpected character at start of regex\n");
-                break;
-            }
-            if (!parse_regex(&index, &address, ALL)) { return; }
-            skip_whitespace(&index);
-            if (*index == '\n' || *index == '\0') {
-                cmd = 'p';
-            } else {
-                cmd = *(index++);
-            }
-            goto test;
-            break;
-        case 's': {
-            char* replace = index;
-            long int matches, sub_len, matches_found;
-            unsigned long i;
-            
-            skip_whitespace(&index);
-            if (*(index++) != '/') {
-                error_s("unexpected character at start of regex\n");
-                break;
-            }
-            if (!parse_regex_lines(&index, &address)) { return; }
-            while(*index != '\0' && *index != '/') index++;
-            if (*index != '/') {
-                error_s("/ missing after %c\n", *index);
-                break;
-            }
-            if (address.data.set.s < 1) {
-                error_s("no matches found\n");
-                break;
-            }
-            *(index++) = '\0';
-            if (*index == '\0' || *index == '\n') {
-                matches = 1;
-            } else if (*index == 'g') {
-                matches = -1;
-            } else {
-                char* end;
-                matches = strtol(index, &end, 10);
-                if (end == index) {
-                    error_s("invalid number: %s\n", index);
-                    break;
-                }
-                if (matches < 1) {
-                    error_s("matches cannot be less than 1\n");
-                    break;
-                }
-            }
-            sub_len = strlen(replace);
-            matches_found = 0;
-            
-            for (i = 0; i < address.data.set.s; i++) {
-                matches_found += substute_string(address.data.set.b[i], matches, last_regex, replace, sub_len);
-            }
-            output("replaced %ld matches over %ld lines\n", matches_found, address.data.set.s);
-            pending_writes = true;
-            break;
-        }
-        case 'w': {
-            bool quit = false;
-            if (*index == 'q') {
-                index++;
-                quit = true;
-            }
-            skip_whitespace(&index);
-            write_file(index, &address, "w");
-            if (quit) {
-                free_address(address);
-                free_data(true);
-                exit(EXIT_SUCCESS);
-            }
-            break;
-        }
-        case 'r': {
-            skip_whitespace(&index);
-            read_file(index);
-            break;
-        }
-        case 'e': 
-            if (!check_if_sure("Load new file for sure? ")) break;
-            __attribute__((fallthrough));
-        case 'E': {
-            char* filename;
-            FILE* file;
-
-            skip_whitespace(&index);
-            
-            filename = index;
-            if(!get_file_name(&filename)) break;
-            
-            file = get_file_s(filename, "r");
-            if (file == NULL) break;
-            
-            load_file(file);
-            break;
-        }
-        case 'W':
-            skip_whitespace(&index);
-            write_file(index, &address, "a");
-            break;
-        case '=':
-            printf("%ld\n", line_current + 1);
-            break;
-        default:
-            error_s("unimplemented command\n");
-            break;
-    }
-
-    free_address(address);
-
-}
-
-static void prompt_loop(void) {
-    while (true) {
-        prompt();
-    }
-}
-
-static void help(void) {
-    printf("Usage: ed [FILE]\n\n");
-    printf("Edit a given [FILE] or create a new text file\n\n");
-    printf("\t(.,.)\tnewline\t\tgo to address line and print\n");
-    printf("\t(.)\ta\t\tappend new data after given line\n");
-    printf("\t(.,.)\tc\t\treplace given lines with new data\n");
-    printf("\t(.,.)\td\t\tdelete given lines\n");
-    printf("\t\te file\t\tdelete current buffer and edit file\n");
-    printf("\t\tE file\t\tdelete current buffer and edit file unconditionally\n");
-    printf("\t\tg/re/command\tgrep all lines with regex and run command on matches\n");
-    printf("\t(.,.)\tn\t\tprint given lines along with their line numbers\n");
-    printf("\t(.,.)\tp\t\tprint given lines\n");
-    printf("\t\tq\t\tquit file\n");
-    printf("\t\tQ\t\tquit file unconditionally\n");
-    printf("\t($)\tr file\t\tread file and append to end of buffer\n");
-    printf("\t(.,.)\ts/re/replace/\treplace the first match on each matching line\n");
-    printf("\t(.,.)\ts/re/replace/g\treplace all matches on each matching line\n");
-    printf("\t(.,.)\ts/re/replace/n\treplace n matches on each matching line\n");
-    printf("\t(.,.)\tw file\t\twrite contents of lines to file\n");
-    printf("\t(.,.)\twq file\t\twrite contents of lines to file then quit\n");
-    printf("\t(.,.)\tW file\t\tappend contents of line to file\n");
-    printf("\t\t=\t\tprint current line number\n");
-}
-
-COMMAND(ed) {
-
-    parse_help(argc, argv, help);
-
-    if (argc < 1) {
-        load_empty();
-        prompt_loop();
-    } else {
-        FILE* file = get_file(argv[0], "r");
-        load_file(file);
-        get_file_name(&argv[0]);
-        prompt_loop();
-    }
-    return EXIT_SUCCESS;
-}