diff options
Diffstat (limited to 'editors/sed.c')
| -rw-r--r-- | editors/sed.c | 58 |
1 files changed, 23 insertions, 35 deletions
diff --git a/editors/sed.c b/editors/sed.c index ed584e5..89b8dd7 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -58,12 +58,6 @@ Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html */ -#include <stdio.h> -#include <unistd.h> /* for getopt() */ -#include <errno.h> -#include <ctype.h> /* for isspace() */ -#include <stdlib.h> -#include <string.h> #include "busybox.h" #include "xregex.h" @@ -94,8 +88,6 @@ typedef struct sed_cmd_s { struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */ } sed_cmd_t; -static const char bad_format_in_subst[] = - "bad format in substitution expression"; static const char *const semicolon_whitespace = "; \n\r\t\v"; struct sed_globals @@ -175,7 +167,7 @@ static void cleanup_outname(void) /* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */ -static void parse_escapes(char *dest, const char *string, int len, char from, char to) +static void parse_escapes(char *dest, char *string, int len, char from, char to) { int i=0; @@ -192,7 +184,7 @@ static void parse_escapes(char *dest, const char *string, int len, char from, ch *dest=0; } -static char *copy_parsing_escapes(const char *string, int len) +static char *copy_parsing_escapes(char *string, int len) { char *dest=xmalloc(len+1); @@ -205,18 +197,22 @@ static char *copy_parsing_escapes(const char *string, int len) * index_of_next_unescaped_regexp_delim - walks left to right through a string * beginning at a specified index and returns the index of the next regular * expression delimiter (typically a forward * slash ('/')) not preceded by - * a backslash ('\'). + * a backslash ('\'). A negative delimiter disables square bracket checking. */ -static int index_of_next_unescaped_regexp_delim(const char delimiter, - const char *str) +static int index_of_next_unescaped_regexp_delim(int delimiter, char *str) { int bracket = -1; int escaped = 0; int idx = 0; char ch; + if (delimiter < 0) { + bracket--; + delimiter *= -1; + } + for (; (ch = str[idx]); idx++) { - if (bracket != -1) { + if (bracket >= 0) { if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2 && str[idx - 1] == '^'))) bracket = -1; @@ -224,43 +220,38 @@ static int index_of_next_unescaped_regexp_delim(const char delimiter, escaped = 0; else if (ch == '\\') escaped = 1; - else if (ch == '[') + else if (bracket == -1 && ch == '[') bracket = idx; else if (ch == delimiter) return idx; } /* if we make it to here, we've hit the end of the string */ - return -1; + bb_error_msg_and_die("unmatched '%c'",delimiter); } /* * Returns the index of the third delimiter */ -static int parse_regex_delim(const char *cmdstr, char **match, char **replace) +static int parse_regex_delim(char *cmdstr, char **match, char **replace) { - const char *cmdstr_ptr = cmdstr; + char *cmdstr_ptr = cmdstr; char delimiter; int idx = 0; /* verify that the 's' or 'y' is followed by something. That something * (typically a 'slash') is now our regexp delimiter... */ - if (*cmdstr == '\0') bb_error_msg_and_die(bad_format_in_subst); + if (*cmdstr == '\0') + bb_error_msg_and_die("bad format in substitution expression"); delimiter = *(cmdstr_ptr++); /* save the match string */ idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr); - if (idx == -1) { - bb_error_msg_and_die(bad_format_in_subst); - } *match = copy_parsing_escapes(cmdstr_ptr, idx); /* save the replacement string */ cmdstr_ptr += idx + 1; - idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr); - if (idx == -1) { - bb_error_msg_and_die(bad_format_in_subst); - } + idx = index_of_next_unescaped_regexp_delim(-delimiter, cmdstr_ptr); *replace = copy_parsing_escapes(cmdstr_ptr, idx); return ((cmdstr_ptr - cmdstr) + idx); @@ -287,21 +278,18 @@ static int get_address(char *my_str, int *linenum, regex_t ** regex) if (*my_str == '\\') delimiter = *(++pos); else delimiter = '/'; next = index_of_next_unescaped_regexp_delim(delimiter, ++pos); - if (next == -1) - bb_error_msg_and_die("unterminated match expression"); - - temp=copy_parsing_escapes(pos,next); + temp = copy_parsing_escapes(pos,next); *regex = (regex_t *) xmalloc(sizeof(regex_t)); xregcomp(*regex, temp, bbg.regex_type|REG_NEWLINE); free(temp); /* Move position to next character after last delimiter */ - pos+=(next+1); + pos += (next+1); } return pos - my_str; } /* Grab a filename. Whitespace at start is skipped, then goes to EOL. */ -static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr, char **retval) +static int parse_file_cmd(sed_cmd_t *sed_cmd, char *filecmdstr, char **retval) { int start = 0, idx, hack=0; @@ -318,7 +306,7 @@ static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr, char **ret return idx; } -static int parse_subst_cmd(sed_cmd_t *const sed_cmd, char *substr) +static int parse_subst_cmd(sed_cmd_t *sed_cmd, char *substr) { int cflags = bbg.regex_type; char *match; @@ -569,7 +557,7 @@ static void pipe_putc(char c) bbg.pipeline.buf[bbg.pipeline.idx++] = c; } -static void do_subst_w_backrefs(const char *line, const char *replace) +static void do_subst_w_backrefs(char *line, char *replace) { int i,j; @@ -669,7 +657,7 @@ static int do_subst_command(sed_cmd_t *sed_cmd, char **line) } /* Set command pointer to point to this label. (Does not handle null label.) */ -static sed_cmd_t *branch_to(const char *label) +static sed_cmd_t *branch_to(char *label) { sed_cmd_t *sed_cmd; |