diff options
| -rw-r--r-- | editors/ed.c | 317 |
1 files changed, 93 insertions, 224 deletions
diff --git a/editors/ed.c b/editors/ed.c index 190c547..3aca759 100644 --- a/editors/ed.c +++ b/editors/ed.c @@ -7,14 +7,6 @@ * 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 */ @@ -88,8 +80,7 @@ static void doCommands(void) char *endbuf, *newname, buf[USERSIZE]; int len, num1, num2, have1, have2; - while (TRUE) - { + while (TRUE) { printf(": "); fflush(stdout); @@ -103,15 +94,12 @@ static void doCommands(void) 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; } @@ -129,8 +117,7 @@ static void doCommands(void) have1 = FALSE; have2 = FALSE; - if ((curNum == 0) && (lastNum > 0)) - { + if ((curNum == 0) && (lastNum > 0)) { curNum = 1; curLine = lines.next; } @@ -141,8 +128,7 @@ static void doCommands(void) while (isblank(*cp)) cp++; - if (*cp == ',') - { + if (*cp == ',') { cp++; if (!getNum(&cp, &have2, &num2)) @@ -164,8 +150,7 @@ static void doCommands(void) if (!have2) num2 = num1; - switch (*cp++) - { + switch (*cp++) { case 'a': addLines(num1 + 1); break; @@ -180,8 +165,7 @@ static void doCommands(void) break; case 'f': - if (*cp && !isblank(*cp)) - { + if (*cp && !isblank(*cp)) { bb_error_msg("bad file command"); break; } @@ -189,20 +173,17 @@ static void doCommands(void) 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; } @@ -221,8 +202,7 @@ static void doCommands(void) 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; } @@ -242,8 +222,7 @@ static void doCommands(void) while (isblank(*cp)) cp++; - if (have1 || *cp) - { + if (have1 || *cp) { bb_error_msg("bad quit command"); break; } @@ -267,8 +246,7 @@ static void doCommands(void) break; case 'r': - if (*cp && !isblank(*cp)) - { + if (*cp && !isblank(*cp)) { bb_error_msg("bad read command"); break; } @@ -276,8 +254,7 @@ static void doCommands(void) while (isblank(*cp)) cp++; - if (*cp == '\0') - { + if (*cp == '\0') { bb_error_msg("no file name"); break; } @@ -298,8 +275,7 @@ static void doCommands(void) break; case 'w': - if (*cp && !isblank(*cp)) - { + if (*cp && !isblank(*cp)) { bb_error_msg("bad write command"); break; } @@ -315,8 +291,7 @@ static void doCommands(void) if (*cp == '\0') cp = fileName; - if (cp == NULL) - { + if (cp == NULL) { bb_error_msg("no file name specified"); break; } @@ -325,8 +300,7 @@ static void doCommands(void) break; case 'z': - switch (*cp) - { + switch (*cp) { case '-': printLines(curNum-21, curNum, FALSE); break; @@ -340,8 +314,7 @@ static void doCommands(void) break; case '.': - if (have1) - { + if (have1) { bb_error_msg("no arguments allowed"); break; } @@ -360,8 +333,7 @@ static void doCommands(void) break; case '\0': - if (have1) - { + if (have1) { printLines(num2, num2, FALSE); break; } @@ -386,14 +358,12 @@ static void doCommands(void) 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; } @@ -408,10 +378,8 @@ static void subCommand(const char * cmd, int num1, int num2) strcpy(buf, cmd); cp = buf; - if (isblank(*cp) || (*cp == '\0')) - { + if (isblank(*cp) || (*cp == '\0')) { bb_error_msg("bad delimiter for substitute"); - return; } @@ -420,10 +388,8 @@ static void subCommand(const char * cmd, int num1, int num2) cp = strchr(cp, delim); - if (cp == NULL) - { + if (cp == NULL) { bb_error_msg("missing 2nd delimiter for substitute"); - return; } @@ -437,8 +403,7 @@ static void subCommand(const char * cmd, int num1, int num2) else cp = ""; - while (*cp) switch (*cp++) - { + while (*cp) switch (*cp++) { case 'g': globalFlag = TRUE; break; @@ -449,16 +414,12 @@ static void subCommand(const char * cmd, int num1, int num2) 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; } @@ -479,14 +440,11 @@ static void subCommand(const char * cmd, int num1, int num2) 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; } @@ -506,12 +464,10 @@ static void subCommand(const char * cmd, int num1, int num2) * 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); @@ -524,8 +480,7 @@ static void subCommand(const char * cmd, int num1, int num2) if (globalFlag) continue; - if (needPrint) - { + if (needPrint) { printLines(num1, num1, FALSE); needPrint = FALSE; } @@ -543,10 +498,8 @@ static void subCommand(const char * cmd, int num1, int num2) */ nlp = (LINE *) malloc(sizeof(LINE) + lp->len + deltaLen); - if (nlp == NULL) - { + if (nlp == NULL) { bb_error_msg("cannot get memory for line"); - return; } @@ -576,8 +529,7 @@ static void subCommand(const char * cmd, int num1, int num2) if (globalFlag) continue; - if (needPrint) - { + if (needPrint) { printLines(num1, num1, FALSE); needPrint = FALSE; } @@ -603,8 +555,7 @@ static int findString( const LINE * lp, const char * str, int len, int offset) cp = &lp->data[offset]; left = lp->len - offset; - while (left >= len) - { + while (left >= len) { ncp = memchr(cp, *str, left); if (ncp == NULL) @@ -636,11 +587,10 @@ static int findString( const LINE * lp, const char * str, int len, int offset) */ 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; @@ -649,16 +599,11 @@ static void addLines(int num) 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; } @@ -687,13 +632,11 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) value = 0; sign = 1; - while (TRUE) - { + while (TRUE) { while (isblank(*cp)) cp++; - switch (*cp) - { + switch (*cp) { case '.': haveNum = TRUE; num = curNum; @@ -709,10 +652,8 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) case '\'': cp++; - if ((*cp < 'a') || (*cp > 'z')) - { + if ((*cp < 'a') || (*cp > 'z')) { bb_error_msg("bad mark name"); - return FALSE; } @@ -724,8 +665,7 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) strcpy(str, ++cp); endStr = strchr(str, '/'); - if (endStr) - { + if (endStr) { *endStr++ = '\0'; cp += (endStr - str); } @@ -741,12 +681,10 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) break; default: - if (!isdigit(*cp)) - { + if (!isdigit(*cp)) { *retcp = cp; *retHaveNum = haveNum; *retNum = value; - return TRUE; } @@ -764,8 +702,7 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) while (isblank(*cp)) cp++; - switch (*cp) - { + switch (*cp) { case '-': sign = -1; cp++; @@ -780,7 +717,6 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) *retcp = cp; *retHaveNum = haveNum; *retNum = value; - return TRUE; } } @@ -792,15 +728,13 @@ static int getNum(const char **retcp, int *retHaveNum, int *retNum) */ 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; } @@ -859,23 +793,19 @@ static void termEdit(void) */ 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; } @@ -888,18 +818,14 @@ static int readLines(const char * file, int num) 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; } @@ -912,22 +838,18 @@ static int readLines(const char * file, int num) 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; } @@ -940,23 +862,17 @@ static int readLines(const char * file, int num) 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; } @@ -980,12 +896,10 @@ static int readLines(const char * file, int num) 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; } @@ -996,7 +910,6 @@ static int writeLines(const char * file, int num1, int num2) if (fd < 0) { perror(file); - return FALSE; } @@ -1005,20 +918,15 @@ static int writeLines(const char * file, int num1, int num2) 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; } @@ -1027,15 +935,12 @@ static int writeLines(const char * file, int num1, int num2) 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; } @@ -1052,10 +957,8 @@ static int printLines(int num1, int num2, int expandFlag) 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; } @@ -1064,10 +967,8 @@ static int printLines(int num1, int num2, int expandFlag) 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; @@ -1085,24 +986,20 @@ static int printLines(int num1, int num2, int expandFlag) 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 = '?'; } @@ -1131,19 +1028,15 @@ static int insertLine(int num, const char * data, int len) { 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; } @@ -1152,14 +1045,11 @@ static int insertLine(int num, const char * data, int len) if (num > lastNum) lp = &lines; - else - { + else { lp = findLine(num); - if (lp == NULL) - { + if (lp == NULL) { free((char *) newLp); - return FALSE; } } @@ -1171,7 +1061,6 @@ static int insertLine(int num, const char * data, int len) lastNum++; dirty = TRUE; - return setCurNum(num); } @@ -1184,10 +1073,8 @@ static int deleteLines(int num1, int num2) 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; } @@ -1196,8 +1083,7 @@ static int deleteLines(int num1, int num2) 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) @@ -1213,8 +1099,7 @@ static int deleteLines(int num1, int num2) lastNum -= count; - while (count-- > 0) - { + while (count-- > 0) { nlp = lp->next; plp = lp->prev; plp->next = nlp; @@ -1244,19 +1129,14 @@ static int searchLines(const char *str, int num1, int num2) 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; } @@ -1273,8 +1153,7 @@ static int searchLines(const char *str, int num1, int num2) if (lp == NULL) return 0; - while (num1 <= num2) - { + while (num1 <= num2) { if (findString(lp, str, len, 0) >= 0) return num1; @@ -1283,7 +1162,6 @@ static int searchLines(const char *str, int num1, int num2) } bb_error_msg("cannot find string \"%s\"", str); - return 0; } @@ -1296,15 +1174,12 @@ static LINE *findLine(int num) 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; } @@ -1315,29 +1190,24 @@ static LINE *findLine(int num) 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; } @@ -1357,6 +1227,5 @@ static int setCurNum(int num) curNum = num; curLine = lp; - return TRUE; } |