* The "ed" built-in command (much simplified)
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <time.h>
-#include <ctype.h>
-#include <sys/param.h>
#include "busybox.h"
#define USERSIZE 1024 /* max line length typed in by user */
char *endbuf, *newname, buf[USERSIZE];
int len, num1, num2, have1, have2;
- while (TRUE)
- {
+ while (TRUE) {
printf(": ");
fflush(stdout);
endbuf = &buf[len - 1];
- if (*endbuf != '\n')
- {
+ if (*endbuf != '\n') {
bb_error_msg("command line too long");
- do
- {
+ do {
len = fgetc(stdin);
- }
- while ((len != EOF) && (len != '\n'));
+ } while ((len != EOF) && (len != '\n'));
continue;
}
have1 = FALSE;
have2 = FALSE;
- if ((curNum == 0) && (lastNum > 0))
- {
+ if ((curNum == 0) && (lastNum > 0)) {
curNum = 1;
curLine = lines.next;
}
while (isblank(*cp))
cp++;
- if (*cp == ',')
- {
+ if (*cp == ',') {
cp++;
if (!getNum(&cp, &have2, &num2))
if (!have2)
num2 = num1;
- switch (*cp++)
- {
+ switch (*cp++) {
case 'a':
addLines(num1 + 1);
break;
break;
case 'f':
- if (*cp && !isblank(*cp))
- {
+ if (*cp && !isblank(*cp)) {
bb_error_msg("bad file command");
break;
}
while (isblank(*cp))
cp++;
- if (*cp == '\0')
- {
+ if (*cp == '\0') {
if (fileName)
printf("\"%s\"\n", fileName);
else
printf("No file name\n");
-
break;
}
newname = strdup(cp);
- if (newname == NULL)
- {
+ if (newname == NULL) {
bb_error_msg("no memory for file name");
break;
}
while (isblank(*cp))
cp++;
- if ((*cp < 'a') || (*cp > 'a') || cp[1])
- {
+ if ((*cp < 'a') || (*cp > 'a') || cp[1]) {
bb_error_msg("bad mark name");
break;
}
while (isblank(*cp))
cp++;
- if (have1 || *cp)
- {
+ if (have1 || *cp) {
bb_error_msg("bad quit command");
break;
}
break;
case 'r':
- if (*cp && !isblank(*cp))
- {
+ if (*cp && !isblank(*cp)) {
bb_error_msg("bad read command");
break;
}
while (isblank(*cp))
cp++;
- if (*cp == '\0')
- {
+ if (*cp == '\0') {
bb_error_msg("no file name");
break;
}
break;
case 'w':
- if (*cp && !isblank(*cp))
- {
+ if (*cp && !isblank(*cp)) {
bb_error_msg("bad write command");
break;
}
if (*cp == '\0')
cp = fileName;
- if (cp == NULL)
- {
+ if (cp == NULL) {
bb_error_msg("no file name specified");
break;
}
break;
case 'z':
- switch (*cp)
- {
+ switch (*cp) {
case '-':
printLines(curNum-21, curNum, FALSE);
break;
break;
case '.':
- if (have1)
- {
+ if (have1) {
bb_error_msg("no arguments allowed");
break;
}
break;
case '\0':
- if (have1)
- {
+ if (have1) {
printLines(num2, num2, FALSE);
break;
}
static void subCommand(const char * cmd, int num1, int num2)
{
char *cp, *oldStr, *newStr, buf[USERSIZE];
- int delim, oldLen, newLen, deltaLen, offset;
+ int delim, oldLen, newLen, deltaLen, offset;
LINE *lp, *nlp;
int globalFlag, printFlag, didSub, needPrint;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2))
- {
+ if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
bb_error_msg("bad line range for substitute");
-
return;
}
strcpy(buf, cmd);
cp = buf;
- if (isblank(*cp) || (*cp == '\0'))
- {
+ if (isblank(*cp) || (*cp == '\0')) {
bb_error_msg("bad delimiter for substitute");
-
return;
}
cp = strchr(cp, delim);
- if (cp == NULL)
- {
+ if (cp == NULL) {
bb_error_msg("missing 2nd delimiter for substitute");
-
return;
}
else
cp = "";
- while (*cp) switch (*cp++)
- {
+ while (*cp) switch (*cp++) {
case 'g':
globalFlag = TRUE;
break;
default:
bb_error_msg("unknown option for substitute");
-
return;
}
- if (*oldStr == '\0')
- {
- if (searchString[0] == '\0')
- {
+ if (*oldStr == '\0') {
+ if (searchString[0] == '\0') {
bb_error_msg("no previous search string");
-
return;
}
offset = 0;
nlp = NULL;
- while (num1 <= num2)
- {
+ while (num1 <= num2) {
offset = findString(lp, oldStr, oldLen, offset);
- if (offset < 0)
- {
- if (needPrint)
- {
+ if (offset < 0) {
+ if (needPrint) {
printLines(num1, num1, FALSE);
needPrint = FALSE;
}
* If the replacement string is the same size or shorter
* than the old string, then the substitution is easy.
*/
- if (deltaLen <= 0)
- {
+ if (deltaLen <= 0) {
memcpy(&lp->data[offset], newStr, newLen);
- if (deltaLen)
- {
+ if (deltaLen) {
memcpy(&lp->data[offset + newLen],
&lp->data[offset + oldLen],
lp->len - offset - oldLen);
if (globalFlag)
continue;
- if (needPrint)
- {
+ if (needPrint) {
printLines(num1, num1, FALSE);
needPrint = FALSE;
}
*/
nlp = (LINE *) malloc(sizeof(LINE) + lp->len + deltaLen);
- if (nlp == NULL)
- {
+ if (nlp == NULL) {
bb_error_msg("cannot get memory for line");
-
return;
}
if (globalFlag)
continue;
- if (needPrint)
- {
+ if (needPrint) {
printLines(num1, num1, FALSE);
needPrint = FALSE;
}
cp = &lp->data[offset];
left = lp->len - offset;
- while (left >= len)
- {
+ while (left >= len) {
ncp = memchr(cp, *str, left);
if (ncp == NULL)
*/
static void addLines(int num)
{
- int len;
- char buf[USERSIZE + 1];
+ int len;
+ char buf[USERSIZE + 1];
- while (fgets(buf, sizeof(buf), stdin))
- {
+ while (fgets(buf, sizeof(buf), stdin)) {
if ((buf[0] == '.') && (buf[1] == '\n') && (buf[2] == '\0'))
return;
if (len == 0)
return;
- if (buf[len - 1] != '\n')
- {
+ if (buf[len - 1] != '\n') {
bb_error_msg("line too long");
-
- do
- {
+ do {
len = fgetc(stdin);
- }
- while ((len != EOF) && (len != '\n'));
-
+ } while ((len != EOF) && (len != '\n'));
return;
}
value = 0;
sign = 1;
- while (TRUE)
- {
+ while (TRUE) {
while (isblank(*cp))
cp++;
- switch (*cp)
- {
+ switch (*cp) {
case '.':
haveNum = TRUE;
num = curNum;
case '\'':
cp++;
- if ((*cp < 'a') || (*cp > 'z'))
- {
+ if ((*cp < 'a') || (*cp > 'z')) {
bb_error_msg("bad mark name");
-
return FALSE;
}
strcpy(str, ++cp);
endStr = strchr(str, '/');
- if (endStr)
- {
+ if (endStr) {
*endStr++ = '\0';
cp += (endStr - str);
}
break;
default:
- if (!isdigit(*cp))
- {
+ if (!isdigit(*cp)) {
*retcp = cp;
*retHaveNum = haveNum;
*retNum = value;
-
return TRUE;
}
while (isblank(*cp))
cp++;
- switch (*cp)
- {
+ switch (*cp) {
case '-':
sign = -1;
cp++;
*retcp = cp;
*retHaveNum = haveNum;
*retNum = value;
-
return TRUE;
}
}
*/
static int initEdit(void)
{
- int i;
+ int i;
bufSize = INITBUF_SIZE;
bufBase = malloc(bufSize);
- if (bufBase == NULL)
- {
+ if (bufBase == NULL) {
bb_error_msg("no memory for buffer");
-
return FALSE;
}
*/
static int readLines(const char * file, int num)
{
- int fd, cc;
+ int fd, cc;
int len, lineCount, charCount;
char *cp;
- if ((num < 1) || (num > lastNum + 1))
- {
+ if ((num < 1) || (num > lastNum + 1)) {
bb_error_msg("bad line for read");
-
return FALSE;
}
fd = open(file, 0);
- if (fd < 0)
- {
+ if (fd < 0) {
perror(file);
-
return FALSE;
}
printf("\"%s\", ", file);
fflush(stdout);
- do
- {
+ do {
cp = memchr(bufPtr, '\n', bufUsed);
- if (cp)
- {
+ if (cp) {
len = (cp - bufPtr) + 1;
- if (!insertLine(num, bufPtr, len))
- {
+ if (!insertLine(num, bufPtr, len)) {
close(fd);
-
return FALSE;
}
continue;
}
- if (bufPtr != bufBase)
- {
+ if (bufPtr != bufBase) {
memcpy(bufBase, bufPtr, bufUsed);
bufPtr = bufBase + bufUsed;
}
- if (bufUsed >= bufSize)
- {
+ if (bufUsed >= bufSize) {
len = (bufSize * 3) / 2;
cp = realloc(bufBase, len);
- if (cp == NULL)
- {
+ if (cp == NULL) {
bb_error_msg("no memory for buffer");
close(fd);
-
return FALSE;
}
bufUsed += cc;
bufPtr = bufBase;
- }
- while (cc > 0);
+ } while (cc > 0);
- if (cc < 0)
- {
+ if (cc < 0) {
perror(file);
close(fd);
-
return FALSE;
}
- if (bufUsed)
- {
- if (!insertLine(num, bufPtr, bufUsed))
- {
+ if (bufUsed) {
+ if (!insertLine(num, bufPtr, bufUsed)) {
close(fd);
-
return -1;
}
static int writeLines(const char * file, int num1, int num2)
{
LINE *lp;
- int fd, lineCount, charCount;
+ int fd, lineCount, charCount;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2))
- {
+ if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
bb_error_msg("bad line range for write");
-
return FALSE;
}
if (fd < 0) {
perror(file);
-
return FALSE;
}
lp = findLine(num1);
- if (lp == NULL)
- {
+ if (lp == NULL) {
close(fd);
-
return FALSE;
}
- while (num1++ <= num2)
- {
- if (write(fd, lp->data, lp->len) != lp->len)
- {
+ while (num1++ <= num2) {
+ if (write(fd, lp->data, lp->len) != lp->len) {
perror(file);
close(fd);
-
return FALSE;
}
lp = lp->next;
}
- if (close(fd) < 0)
- {
+ if (close(fd) < 0) {
perror(file);
-
return FALSE;
}
printf("%d lines, %d chars\n", lineCount, charCount);
-
return TRUE;
}
const char *cp;
int ch, count;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2))
- {
+ if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
bb_error_msg("bad line range for print");
-
return FALSE;
}
if (lp == NULL)
return FALSE;
- while (num1 <= num2)
- {
- if (!expandFlag)
- {
+ while (num1 <= num2) {
+ if (!expandFlag) {
write(1, lp->data, lp->len);
setCurNum(num1++);
lp = lp->next;
if ((count > 0) && (cp[count - 1] == '\n'))
count--;
- while (count-- > 0)
- {
+ while (count-- > 0) {
ch = *cp++;
- if (ch & 0x80)
- {
+ if (ch & 0x80) {
fputs("M-", stdout);
ch &= 0x7f;
}
- if (ch < ' ')
- {
+ if (ch < ' ') {
fputc('^', stdout);
ch += '@';
}
- if (ch == 0x7f)
- {
+ if (ch == 0x7f) {
fputc('^', stdout);
ch = '?';
}
{
LINE *newLp, *lp;
- if ((num < 1) || (num > lastNum + 1))
- {
+ if ((num < 1) || (num > lastNum + 1)) {
bb_error_msg("inserting at bad line number");
-
return FALSE;
}
- newLp = (LINE *) malloc(sizeof(LINE) + len - 1);
+ newLp = malloc(sizeof(LINE) + len - 1);
- if (newLp == NULL)
- {
+ if (newLp == NULL) {
bb_error_msg("failed to allocate memory for line");
-
return FALSE;
}
if (num > lastNum)
lp = &lines;
- else
- {
+ else {
lp = findLine(num);
- if (lp == NULL)
- {
+ if (lp == NULL) {
free((char *) newLp);
-
return FALSE;
}
}
lastNum++;
dirty = TRUE;
-
return setCurNum(num);
}
LINE *lp, *nlp, *plp;
int count;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2))
- {
+ if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
bb_error_msg("bad line numbers for delete");
-
return FALSE;
}
if (lp == NULL)
return FALSE;
- if ((curNum >= num1) && (curNum <= num2))
- {
+ if ((curNum >= num1) && (curNum <= num2)) {
if (num2 < lastNum)
setCurNum(num2 + 1);
else if (num1 > 1)
lastNum -= count;
- while (count-- > 0)
- {
+ while (count-- > 0) {
nlp = lp->next;
plp = lp->prev;
plp->next = nlp;
const LINE *lp;
int len;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2))
- {
+ if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
bb_error_msg("bad line numbers for search");
-
return 0;
}
- if (*str == '\0')
- {
- if (searchString[0] == '\0')
- {
+ if (*str == '\0') {
+ if (searchString[0] == '\0') {
bb_error_msg("no previous search string");
-
return 0;
}
if (lp == NULL)
return 0;
- while (num1 <= num2)
- {
+ while (num1 <= num2) {
if (findString(lp, str, len, 0) >= 0)
return num1;
}
bb_error_msg("cannot find string \"%s\"", str);
-
return 0;
}
LINE *lp;
int lnum;
- if ((num < 1) || (num > lastNum))
- {
+ if ((num < 1) || (num > lastNum)) {
bb_error_msg("line number %d does not exist", num);
-
return NULL;
}
- if (curNum <= 0)
- {
+ if (curNum <= 0) {
curNum = 1;
curLine = lines.next;
}
lp = curLine;
lnum = curNum;
- if (num < (curNum / 2))
- {
+ if (num < (curNum / 2)) {
lp = lines.next;
lnum = 1;
}
- else if (num > ((curNum + lastNum) / 2))
- {
+ else if (num > ((curNum + lastNum) / 2)) {
lp = lines.prev;
lnum = lastNum;
}
- while (lnum < num)
- {
+ while (lnum < num) {
lp = lp->next;
lnum++;
}
- while (lnum > num)
- {
+ while (lnum > num) {
lp = lp->prev;
lnum--;
}
-
return lp;
}
curNum = num;
curLine = lp;
-
return TRUE;
}
projects / oweals / busybox.git / blobdiff