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authorDenis Vlasenko2007-09-25 11:55:57 +0000
committerDenis Vlasenko2007-09-25 11:55:57 +0000
commitd9391b15f166cfc016f5768c8d6a89858e0d7e41 (patch)
tree0524b8ff17be49d32a88250a6b899e35b0d000d3 /editors/ed.c
parenta545726d2baa08b28510336b32d85de91df51d9e (diff)
downloadbusybox-d9391b15f166cfc016f5768c8d6a89858e0d7e41.zip
busybox-d9391b15f166cfc016f5768c8d6a89858e0d7e41.tar.gz
ed: large cleanup
function old new delta bad_nums - 43 +43 skip_blank - 24 +24 getNum 557 578 +21 insertLine 159 163 +4 setCurNum 31 33 +2 lastNum 4 - -4 fileName 4 - -4 dirty 4 - -4 curNum 4 - -4 curLine 4 - -4 bufUsed 4 - -4 bufSize 4 - -4 bufPtr 4 - -4 bufBase 4 - -4 printLines 357 345 -12 findLine 165 152 -13 lines 16 - -16 deleteLines 203 144 -59 readLines 538 473 -65 addLines 163 87 -76 marks 104 - -104 termEdit 140 - -140 ed_main 3125 2654 -471 ------------------------------------------------------------------------------ (add/remove: 2/12 grow/shrink: 3/6 up/down: 94/-992) Total: -898 bytes text data bss dec hex filename 771142 1034 10564 782740 bf194 busybox_old 770265 1034 10404 781703 bed87 busybox_unstripped # size */ed.o text data bss dec hex filename 6370 0 156 6526 197e editors.org/ed.o 5505 0 0 5505 1581 editors/ed.o
Diffstat (limited to 'editors/ed.c')
-rw-r--r--editors/ed.c440
1 files changed, 135 insertions, 305 deletions
diff --git a/editors/ed.c b/editors/ed.c
index e6576b4..f5b9c39 100644
--- a/editors/ed.c
+++ b/editors/ed.c
@@ -9,6 +9,14 @@
#include "libbb.h"
+typedef struct LINE {
+ struct LINE *next;
+ struct LINE *prev;
+ int len;
+ char data[1];
+} LINE;
+
+
#define searchString bb_common_bufsiz1
enum {
@@ -17,64 +25,92 @@ enum {
INITBUF_SIZE = 1024, /* initial buffer size */
};
-typedef struct LINE {
- struct LINE *next;
- struct LINE *prev;
- int len;
- char data[1];
-} LINE;
+struct globals {
+ int curNum;
+ int lastNum;
+ int bufUsed;
+ int bufSize;
+ LINE *curLine;
+ char *bufBase;
+ char *bufPtr;
+ char *fileName;
+ LINE lines;
+ smallint dirty;
+ int marks[26];
+};
+#define G (*ptr_to_globals)
+#define curLine (G.curLine )
+#define bufBase (G.bufBase )
+#define bufPtr (G.bufPtr )
+#define fileName (G.fileName )
+#define curNum (G.curNum )
+#define lastNum (G.lastNum )
+#define bufUsed (G.bufUsed )
+#define bufSize (G.bufSize )
+#define dirty (G.dirty )
+#define lines (G.lines )
+#define marks (G.marks )
+#define INIT_G() do { \
+ PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
+} while (0)
-static LINE lines, *curLine;
-static int curNum, lastNum, marks[26], dirty;
-static char *bufBase, *bufPtr, *fileName;
-static int bufUsed, bufSize;
static void doCommands(void);
static void subCommand(const char *cmd, int num1, int num2);
-static int getNum(const char **retcp, int *retHaveNum, int *retNum);
+static int getNum(const char **retcp, smallint *retHaveNum, int *retNum);
static int setCurNum(int num);
-static int initEdit(void);
-static void termEdit(void);
static void addLines(int num);
static int insertLine(int num, const char *data, int len);
-static int deleteLines(int num1, int num2);
+static void deleteLines(int num1, int num2);
static int printLines(int num1, int num2, int expandFlag);
static int writeLines(const char *file, int num1, int num2);
static int readLines(const char *file, int num);
static int searchLines(const char *str, int num1, int num2);
static LINE *findLine(int num);
-
static int findString(const LINE *lp, const char * str, int len, int offset);
+
+static int bad_nums(int num1, int num2, const char *for_what)
+{
+ if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
+ bb_error_msg("bad line range for %s", for_what);
+ return 1;
+ }
+ return 0;
+}
+
+
+static char *skip_blank(const char *cp)
+{
+// NB: fix comment in skip_whitespace!
+ while (isblank(*cp))
+ cp++;
+ return (char *)cp;
+}
+
+
int ed_main(int argc, char **argv);
int ed_main(int argc, char **argv)
{
- if (!initEdit())
- return EXIT_FAILURE;
-
- if (argc > 1) {
- fileName = strdup(argv[1]);
+ INIT_G();
- if (fileName == NULL) {
- bb_error_msg("no memory");
- termEdit();
- return EXIT_SUCCESS;
- }
+ bufSize = INITBUF_SIZE;
+ bufBase = xmalloc(bufSize);
+ bufPtr = bufBase;
+ lines.next = &lines;
+ lines.prev = &lines;
+ if (argc > 1) {
+ fileName = xstrdup(argv[1]);
if (!readLines(fileName, 1)) {
- termEdit();
return EXIT_SUCCESS;
}
-
if (lastNum)
setCurNum(1);
-
dirty = FALSE;
}
doCommands();
-
- termEdit();
return EXIT_SUCCESS;
}
@@ -85,42 +121,25 @@ static void doCommands(void)
{
const char *cp;
char *endbuf, *newname, buf[USERSIZE];
- int len, num1, num2, have1, have2;
+ int len, num1, num2;
+ smallint have1, have2;
while (TRUE) {
- printf(": ");
- fflush(stdout);
-
- if (fgets(buf, sizeof(buf), stdin) == NULL)
- return;
-
- len = strlen(buf);
-
- if (len == 0)
+// NB: fix comment in lineedit.c!
+ /* Returns:
+ * -1 on read errors or EOF, or on bare Ctrl-D.
+ * 0 on ctrl-C,
+ * >0 length of input string, including terminating '\n'
+ */
+ len = read_line_input(": ", buf, sizeof(buf), NULL);
+ if (len <= 0)
return;
-
endbuf = &buf[len - 1];
-
- if (*endbuf != '\n') {
- bb_error_msg("command line too long");
-
- do {
- len = fgetc(stdin);
- } while ((len != EOF) && (len != '\n'));
-
- continue;
- }
-
while ((endbuf > buf) && isblank(endbuf[-1]))
endbuf--;
-
*endbuf = '\0';
- cp = buf;
-
- while (isblank(*cp))
- cp++;
-
+ cp = skip_blank(buf);
have1 = FALSE;
have2 = FALSE;
@@ -132,28 +151,21 @@ static void doCommands(void)
if (!getNum(&cp, &have1, &num1))
continue;
- while (isblank(*cp))
- cp++;
+ cp = skip_blank(cp);
if (*cp == ',') {
cp++;
-
if (!getNum(&cp, &have2, &num2))
continue;
-
if (!have1)
num1 = 1;
-
if (!have2)
num2 = lastNum;
-
have1 = TRUE;
have2 = TRUE;
}
-
if (!have1)
num1 = curNum;
-
if (!have2)
num2 = num1;
@@ -176,10 +188,7 @@ static void doCommands(void)
bb_error_msg("bad file command");
break;
}
-
- while (isblank(*cp))
- cp++;
-
+ cp = skip_blank(cp);
if (*cp == '\0') {
if (fileName)
printf("\"%s\"\n", fileName);
@@ -187,17 +196,12 @@ static void doCommands(void)
printf("No file name\n");
break;
}
-
newname = strdup(cp);
-
if (newname == NULL) {
bb_error_msg("no memory for file name");
break;
}
-
- if (fileName)
- free(fileName);
-
+ free(fileName);
fileName = newname;
break;
@@ -206,14 +210,11 @@ static void doCommands(void)
break;
case 'k':
- while (isblank(*cp))
- cp++;
-
- if ((*cp < 'a') || (*cp > 'a') || cp[1]) {
+ cp = skip_blank(cp);
+ if ((*cp < 'a') || (*cp > 'z') || cp[1]) {
bb_error_msg("bad mark name");
break;
}
-
marks[*cp - 'a'] = num2;
break;
@@ -226,30 +227,20 @@ static void doCommands(void)
break;
case 'q':
- while (isblank(*cp))
- cp++;
-
+ cp = skip_blank(cp);
if (have1 || *cp) {
bb_error_msg("bad quit command");
break;
}
-
if (!dirty)
return;
-
- printf("Really quit? ");
- fflush(stdout);
-
- buf[0] = '\0';
- fgets(buf, sizeof(buf), stdin);
- cp = buf;
-
- while (isblank(*cp))
- cp++;
-
- if ((*cp == 'y') || (*cp == 'Y'))
+ len = read_line_input("Really quit? ", buf, 16, NULL);
+ /* read error/EOF - no way to continue */
+ if (len < 0)
+ return;
+ cp = skip_blank(buf);
+ if ((*cp | 0x20) == 'y') /* Y or y */
return;
-
break;
case 'r':
@@ -257,24 +248,17 @@ static void doCommands(void)
bb_error_msg("bad read command");
break;
}
-
- while (isblank(*cp))
- cp++;
-
+ cp = skip_blank(cp);
if (*cp == '\0') {
bb_error_msg("no file name");
break;
}
-
if (!have1)
num1 = lastNum;
-
if (readLines(cp, num1 + 1))
break;
-
if (fileName == NULL)
fileName = strdup(cp);
-
break;
case 's':
@@ -286,36 +270,30 @@ static void doCommands(void)
bb_error_msg("bad write command");
break;
}
-
- while (isblank(*cp))
- cp++;
-
+ cp = skip_blank(cp);
if (!have1) {
num1 = 1;
num2 = lastNum;
}
-
if (*cp == '\0')
cp = fileName;
-
if (cp == NULL) {
bb_error_msg("no file name specified");
break;
}
-
writeLines(cp, num1, num2);
break;
case 'z':
switch (*cp) {
case '-':
- printLines(curNum-21, curNum, FALSE);
+ printLines(curNum - 21, curNum, FALSE);
break;
case '.':
- printLines(curNum-11, curNum+10, FALSE);
+ printLines(curNum - 11, curNum + 10, FALSE);
break;
default:
- printLines(curNum, curNum+21, FALSE);
+ printLines(curNum, curNum + 21, FALSE);
break;
}
break;
@@ -325,29 +303,24 @@ static void doCommands(void)
bb_error_msg("no arguments allowed");
break;
}
-
printLines(curNum, curNum, FALSE);
break;
case '-':
if (setCurNum(curNum - 1))
printLines(curNum, curNum, FALSE);
-
break;
case '=':
printf("%d\n", num1);
break;
-
case '\0':
if (have1) {
printLines(num2, num2, FALSE);
break;
}
-
if (setCurNum(curNum + 1))
printLines(curNum, curNum, FALSE);
-
break;
default:
@@ -362,17 +335,15 @@ static void doCommands(void)
* Do the substitute command.
* The current line is set to the last substitution done.
*/
-static void subCommand(const char * cmd, int num1, int num2)
+static void subCommand(const char *cmd, int num1, int num2)
{
char *cp, *oldStr, *newStr, buf[USERSIZE];
int delim, oldLen, newLen, deltaLen, offset;
LINE *lp, *nlp;
int globalFlag, printFlag, didSub, needPrint;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
- bb_error_msg("bad line range for substitute");
+ if (bad_nums(num1, num2, "substitute"))
return;
- }
globalFlag = FALSE;
printFlag = FALSE;
@@ -394,7 +365,6 @@ static void subCommand(const char * cmd, int num1, int num2)
oldStr = cp;
cp = strchr(cp, delim);
-
if (cp == NULL) {
bb_error_msg("missing 2nd delimiter for substitute");
return;
@@ -414,11 +384,9 @@ static void subCommand(const char * cmd, int num1, int num2)
case 'g':
globalFlag = TRUE;
break;
-
case 'p':
printFlag = TRUE;
break;
-
default:
bb_error_msg("unknown option for substitute");
return;
@@ -429,7 +397,6 @@ static void subCommand(const char * cmd, int num1, int num2)
bb_error_msg("no previous search string");
return;
}
-
oldStr = searchString;
}
@@ -437,7 +404,6 @@ static void subCommand(const char * cmd, int num1, int num2)
strcpy(searchString, oldStr);
lp = findLine(num1);
-
if (lp == NULL)
return;
@@ -455,11 +421,9 @@ static void subCommand(const char * cmd, int num1, int num2)
printLines(num1, num1, FALSE);
needPrint = FALSE;
}
-
offset = 0;
lp = lp->next;
num1++;
-
continue;
}
@@ -473,7 +437,6 @@ static void subCommand(const char * cmd, int num1, int num2)
*/
if (deltaLen <= 0) {
memcpy(&lp->data[offset], newStr, newLen);
-
if (deltaLen) {
memcpy(&lp->data[offset + newLen],
&lp->data[offset + oldLen],
@@ -481,20 +444,15 @@ static void subCommand(const char * cmd, int num1, int num2)
lp->len += deltaLen;
}
-
offset += newLen;
-
if (globalFlag)
continue;
-
if (needPrint) {
printLines(num1, num1, FALSE);
needPrint = FALSE;
}
-
lp = lp->next;
num1++;
-
continue;
}
@@ -503,8 +461,7 @@ static void subCommand(const char * cmd, int num1, int num2)
* structure and use that. Link it in in place of
* the old line structure.
*/
- nlp = (LINE *) malloc(sizeof(LINE) + lp->len + deltaLen);
-
+ nlp = malloc(sizeof(LINE) + lp->len + deltaLen);
if (nlp == NULL) {
bb_error_msg("cannot get memory for line");
return;
@@ -513,9 +470,7 @@ static void subCommand(const char * cmd, int num1, int num2)
nlp->len = lp->len + deltaLen;
memcpy(nlp->data, lp->data, offset);
-
memcpy(&nlp->data[offset], newStr, newLen);
-
memcpy(&nlp->data[offset + newLen],
&lp->data[offset + oldLen],
lp->len - offset - oldLen);
@@ -554,7 +509,7 @@ static void subCommand(const char * cmd, int num1, int num2)
* Search a line for the specified string starting at the specified
* offset in the line. Returns the offset of the found string, or -1.
*/
-static int findString( const LINE * lp, const char * str, int len, int offset)
+static int findString(const LINE *lp, const char *str, int len, int offset)
{
int left;
const char *cp, *ncp;
@@ -564,20 +519,14 @@ static int findString( const LINE * lp, const char * str, int len, int offset)
while (left >= len) {
ncp = memchr(cp, *str, left);
-
if (ncp == NULL)
return -1;
-
left -= (ncp - cp);
-
if (left < len)
return -1;
-
cp = ncp;
-
if (memcmp(cp, str, len) == 0)
return (cp - lp->data);
-
cp++;
left--;
}
@@ -597,23 +546,20 @@ static void addLines(int num)
int len;
char buf[USERSIZE + 1];
- while (fgets(buf, sizeof(buf), stdin)) {
- if ((buf[0] == '.') && (buf[1] == '\n') && (buf[2] == '\0'))
- return;
-
- len = strlen(buf);
-
- if (len == 0)
- return;
-
- if (buf[len - 1] != '\n') {
- bb_error_msg("line too long");
- do {
- len = fgetc(stdin);
- } while ((len != EOF) && (len != '\n'));
+ while (1) {
+ /* Returns:
+ * -1 on read errors or EOF, or on bare Ctrl-D.
+ * 0 on ctrl-C,
+ * >0 length of input string, including terminating '\n'
+ */
+ len = read_line_input("", buf, sizeof(buf), NULL);
+ if (len <= 0) {
+ /* Previously, ctrl-C was exiting to shell.
+ * Now we exit to ed prompt. Is in important? */
return;
}
-
+ if ((buf[0] == '.') && (buf[1] == '\n') && (buf[2] == '\0'))
+ return;
if (!insertLine(num++, buf, len))
return;
}
@@ -628,20 +574,20 @@ static void addLines(int num)
* Whether there was a number is returned indirectly, as is the number.
* The character pointer which stopped the scan is also returned.
*/
-static int getNum(const char **retcp, int *retHaveNum, int *retNum)
+static int getNum(const char **retcp, smallint *retHaveNum, int *retNum)
{
const char *cp;
char *endStr, str[USERSIZE];
- int haveNum, value, num, sign;
+ int value, num;
+ smallint haveNum, minus;
cp = *retcp;
- haveNum = FALSE;
value = 0;
- sign = 1;
+ haveNum = FALSE;
+ minus = 0;
while (TRUE) {
- while (isblank(*cp))
- cp++;
+ cp = skip_blank(cp);
switch (*cp) {
case '.':
@@ -658,12 +604,10 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum)
case '\'':
cp++;
-
if ((*cp < 'a') || (*cp > 'z')) {
bb_error_msg("bad mark name");
return FALSE;
}
-
haveNum = TRUE;
num = marks[*cp++ - 'a'];
break;
@@ -671,19 +615,14 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum)
case '/':
strcpy(str, ++cp);
endStr = strchr(str, '/');
-
if (endStr) {
*endStr++ = '\0';
cp += (endStr - str);
- }
- else
+ } else
cp = "";
-
num = searchLines(str, curNum, lastNum);
-
if (num == 0)
return FALSE;
-
haveNum = TRUE;
break;
@@ -694,29 +633,25 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum)
*retNum = value;
return TRUE;
}
-
num = 0;
-
while (isdigit(*cp))
num = num * 10 + *cp++ - '0';
-
haveNum = TRUE;
break;
}
- value += num * sign;
+ value += (minus ? -num : num);
- while (isblank(*cp))
- cp++;
+ cp = skip_blank(cp);
switch (*cp) {
case '-':
- sign = -1;
+ minus = 1;
cp++;
break;
case '+':
- sign = 1;
+ minus = 0;
cp++;
break;
@@ -731,74 +666,10 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum)
/*
- * Initialize everything for editing.
- */
-static int initEdit(void)
-{
- int i;
-
- bufSize = INITBUF_SIZE;
- bufBase = malloc(bufSize);
-
- if (bufBase == NULL) {
- bb_error_msg("no memory for buffer");
- return FALSE;
- }
-
- bufPtr = bufBase;
- bufUsed = 0;
-
- lines.next = &lines;
- lines.prev = &lines;
-
- curLine = NULL;
- curNum = 0;
- lastNum = 0;
- dirty = FALSE;
- fileName = NULL;
- searchString[0] = '\0';
-
- for (i = 0; i < 26; i++)
- marks[i] = 0;
-
- return TRUE;
-}
-
-
-/*
- * Finish editing.
- */
-static void termEdit(void)
-{
- if (bufBase)
- free(bufBase);
-
- bufBase = NULL;
- bufPtr = NULL;
- bufSize = 0;
- bufUsed = 0;
-
- if (fileName)
- free(fileName);
-
- fileName = NULL;
-
- searchString[0] = '\0';
-
- if (lastNum)
- deleteLines(1, lastNum);
-
- lastNum = 0;
- curNum = 0;
- curLine = NULL;
-}
-
-
-/*
* Read lines from a file at the specified line number.
* Returns TRUE if the file was successfully read.
*/
-static int readLines(const char * file, int num)
+static int readLines(const char *file, int num)
{
int fd, cc;
int len, lineCount, charCount;
@@ -810,7 +681,6 @@ static int readLines(const char * file, int num)
}
fd = open(file, 0);
-
if (fd < 0) {
perror(file);
return FALSE;
@@ -830,18 +700,15 @@ static int readLines(const char * file, int num)
if (cp) {
len = (cp - bufPtr) + 1;
-
if (!insertLine(num, bufPtr, len)) {
close(fd);
return FALSE;
}
-
bufPtr += len;
bufUsed -= len;
charCount += len;
lineCount++;
num++;
-
continue;
}
@@ -853,19 +720,17 @@ static int readLines(const char * file, int num)
if (bufUsed >= bufSize) {
len = (bufSize * 3) / 2;
cp = realloc(bufBase, len);
-
if (cp == NULL) {
bb_error_msg("no memory for buffer");
close(fd);
return FALSE;
}
-
bufBase = cp;
bufPtr = bufBase + bufUsed;
bufSize = len;
}
- cc = read(fd, bufPtr, bufSize - bufUsed);
+ cc = safe_read(fd, bufPtr, bufSize - bufUsed);
bufUsed += cc;
bufPtr = bufBase;
@@ -882,7 +747,6 @@ static int readLines(const char * file, int num)
close(fd);
return -1;
}
-
lineCount++;
charCount += bufUsed;
}
@@ -900,21 +764,18 @@ static int readLines(const char * file, int num)
* Write the specified lines out to the specified file.
* Returns TRUE if successful, or FALSE on an error with a message output.
*/
-static int writeLines(const char * file, int num1, int num2)
+static int writeLines(const char *file, int num1, int num2)
{
LINE *lp;
int fd, lineCount, charCount;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
- bb_error_msg("bad line range for write");
+ if (bad_nums(num1, num2, "write"))
return FALSE;
- }
lineCount = 0;
charCount = 0;
fd = creat(file, 0666);
-
if (fd < 0) {
perror(file);
return FALSE;
@@ -924,19 +785,17 @@ static int writeLines(const char * file, int num1, int num2)
fflush(stdout);
lp = findLine(num1);
-
if (lp == NULL) {
close(fd);
return FALSE;
}
while (num1++ <= num2) {
- if (write(fd, lp->data, lp->len) != lp->len) {
+ if (full_write(fd, lp->data, lp->len) != lp->len) {
perror(file);
close(fd);
return FALSE;
}
-
charCount += lp->len;
lineCount++;
lp = lp->next;
@@ -964,13 +823,10 @@ static int printLines(int num1, int num2, int expandFlag)
const char *cp;
int ch, count;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
- bb_error_msg("bad line range for print");
+ if (bad_nums(num1, num2, "print"))
return FALSE;
- }
lp = findLine(num1);
-
if (lp == NULL)
return FALSE;
@@ -979,7 +835,6 @@ static int printLines(int num1, int num2, int expandFlag)
write(1, lp->data, lp->len);
setCurNum(num1++);
lp = lp->next;
-
continue;
}
@@ -995,22 +850,18 @@ static int printLines(int num1, int num2, int expandFlag)
while (count-- > 0) {
ch = *cp++;
-
if (ch & 0x80) {
fputs("M-", stdout);
ch &= 0x7f;
}
-
if (ch < ' ') {
fputc('^', stdout);
ch += '@';
}
-
if (ch == 0x7f) {
fputc('^', stdout);
ch = '?';
}
-
fputc(ch, stdout);
}
@@ -1031,7 +882,7 @@ static int printLines(int num1, int num2, int expandFlag)
* The inserted line is also set to become the current line.
* Returns TRUE if successful.
*/
-static int insertLine(int num, const char * data, int len)
+static int insertLine(int num, const char *data, int len)
{
LINE *newLp, *lp;
@@ -1041,7 +892,6 @@ static int insertLine(int num, const char * data, int len)
}
newLp = malloc(sizeof(LINE) + len - 1);
-
if (newLp == NULL) {
bb_error_msg("failed to allocate memory for line");
return FALSE;
@@ -1054,7 +904,6 @@ static int insertLine(int num, const char * data, int len)
lp = &lines;
else {
lp = findLine(num);
-
if (lp == NULL) {
free((char *) newLp);
return FALSE;
@@ -1075,20 +924,17 @@ static int insertLine(int num, const char * data, int len)
/*
* Delete lines from the given range.
*/
-static int deleteLines(int num1, int num2)
+static void deleteLines(int num1, int num2)
{
LINE *lp, *nlp, *plp;
int count;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
- bb_error_msg("bad line numbers for delete");
- return FALSE;
- }
+ if (bad_nums(num1, num2, "delete"))
+ return;
lp = findLine(num1);
-
if (lp == NULL)
- return FALSE;
+ return;
if ((curNum >= num1) && (curNum <= num2)) {
if (num2 < lastNum)
@@ -1100,10 +946,8 @@ static int deleteLines(int num1, int num2)
}
count = num2 - num1 + 1;
-
if (curNum > num2)
curNum -= count;
-
lastNum -= count;
while (count-- > 0) {
@@ -1111,22 +955,17 @@ static int deleteLines(int num1, int num2)
plp = lp->prev;
plp->next = nlp;
nlp->prev = plp;
- lp->next = NULL;
- lp->prev = NULL;
- lp->len = 0;
free(lp);
lp = nlp;
}
dirty = TRUE;
-
- return TRUE;
}
/*
* Search for a line which contains the specified string.
- * If the string is NULL, then the previously searched for string
+ * If the string is "", then the previously searched for string
* is used. The currently searched for string is saved for future use.
* Returns the line number which matches, or 0 if there was no match
* with an error printed.
@@ -1136,17 +975,14 @@ static int searchLines(const char *str, int num1, int num2)
const LINE *lp;
int len;
- if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
- bb_error_msg("bad line numbers for search");
+ if (bad_nums(num1, num2, "search"))
return 0;
- }
if (*str == '\0') {
if (searchString[0] == '\0') {
bb_error_msg("no previous search string");
return 0;
}
-
str = searchString;
}
@@ -1156,14 +992,12 @@ static int searchLines(const char *str, int num1, int num2)
len = strlen(str);
lp = findLine(num1);
-
if (lp == NULL)
return 0;
while (num1 <= num2) {
if (findString(lp, str, len, 0) >= 0)
return num1;
-
num1++;
lp = lp->next;
}
@@ -1196,12 +1030,10 @@ static LINE *findLine(int num)
lp = curLine;
lnum = curNum;
-
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;
}
@@ -1228,10 +1060,8 @@ static int setCurNum(int num)
LINE *lp;
lp = findLine(num);
-
if (lp == NULL)
return FALSE;
-
curNum = num;
curLine = lp;
return TRUE;