/*
* returns the index in the string just past where the address ends.
*/
-static int get_address(struct sed_cmd *sed_cmd, const char *str, int *line, regex_t **regex)
+static int get_address(struct sed_cmd *sed_cmd, const char *str, int *linenum, regex_t **regex)
{
char *my_str = strdup(str);
int idx = 0;
idx++;
} while (isdigit(my_str[idx]));
my_str[idx] = 0;
- *line = atoi(my_str);
+ *linenum = atoi(my_str);
}
else if (my_str[idx] == '$') {
- *line = -1;
+ *linenum = -1;
idx++;
}
else if (my_str[idx] == '/') {
if (strchr("pd", cmdstr[idx])) {
idx++;
}
- /* handle (s)ubstitution */
+ /* handle (s)ubstitution command */
else if (sed_cmd->cmd == 's') {
idx += parse_subst_cmd(sed_cmd, &cmdstr[idx]);
}
/* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
- else if (strchr("aic", cmdstr[idx])) {
- if (sed_cmd->end_line || sed_cmd->end_match)
+ else if (strchr("aic", sed_cmd->cmd)) {
+ if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
error_msg_and_die("only a beginning address can be specified for edit commands");
idx += parse_edit_cmd(sed_cmd, &cmdstr[idx]);
}
return altered;
}
-static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
-{
- int altered = 0;
-
- switch (sed_cmd->cmd) {
-
- case 'p':
- puts(line);
- break;
-
- case 'd':
- altered++;
- break;
-
- case 's':
-
- /*
- * Some special cases for 's' printing to make it compliant with
- * GNU sed printing behavior (aka "The -n | s///p Matrix"):
- *
- * -n ONLY = never print anything regardless of any successful
- * substitution
- *
- * s///p ONLY = always print successful substitutions, even if
- * the line is going to be printed anyway (line will be printed
- * twice).
- *
- * -n AND s///p = print ONLY a successful substitution ONE TIME;
- * no other lines are printed - this is the reason why the 'p'
- * flag exists in the first place.
- */
-
- /* if the user specified that they didn't want anything printed (i.e., a -n
- * flag and no 'p' flag after the s///), then there's really no point doing
- * anything here. */
- if (be_quiet && !sed_cmd->sub_p)
- break;
-
- /* we print the line once, unless we were told to be quiet */
- if (!be_quiet)
- altered = do_subst_command(sed_cmd, line);
-
- /* we also print the line if we were given the 'p' flag
- * (this is quite possibly the second printing) */
- if (sed_cmd->sub_p)
- altered = do_subst_command(sed_cmd, line);
-
- break;
-
- case 'a':
- puts(line);
- fputs(sed_cmd->editline, stdout);
- altered++;
- break;
-
- case 'i':
- fputs(sed_cmd->editline, stdout);
- break;
-
- case 'c':
- fputs(sed_cmd->editline, stdout);
- altered++;
- break;
-
- case 'r': {
- FILE *file;
- puts(line);
- file = fopen(sed_cmd->filename, "r");
- if (file)
- print_file(file);
- /* else if we couldn't open the file, no biggie, just don't print anything */
- altered++;
- }
- break;
- }
-
- return altered;
-}
static void process_file(FILE *file)
{
char *line = NULL;
static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
unsigned int still_in_range = 0;
- int line_altered;
+ int altered;
int i;
/* go through every line in the file */
chomp(line);
linenum++;
- line_altered = 0;
+ altered = 0;
/* for every line, go through all the commands */
for (i = 0; i < ncmds; i++) {
- /* are we acting on a range of matched lines? */
- if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
- if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
- line_altered += do_sed_command(&sed_cmds[i], line);
- if (still_in_range && regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
- still_in_range = 0;
- else
- still_in_range = 1;
- }
- }
- /* are we trying to match a single line? */
- else if (sed_cmds[i].beg_match) {
- if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
- line_altered += do_sed_command(&sed_cmds[i], line);
- }
+ /*
+ * entry point into sedding...
+ */
+ if (
+ /* this line number is the first address we're looking for */
+ (sed_cmds[i].beg_line && (sed_cmds[i].beg_line == linenum)) ||
+ /* this line matches our first address regex */
+ (sed_cmds[i].beg_match && (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)) ||
+ /* we are currently within the beginning & ending address range */
+ still_in_range
+ ) {
+
+ /*
+ * actual sedding
+ */
+ switch (sed_cmds[i].cmd) {
+
+ case 'p':
+ puts(line);
+ break;
+
+ case 'd':
+ altered++;
+ break;
+
+ case 's':
+
+ /*
+ * Some special cases for 's' printing to make it compliant with
+ * GNU sed printing behavior (aka "The -n | s///p Matrix"):
+ *
+ * -n ONLY = never print anything regardless of any successful
+ * substitution
+ *
+ * s///p ONLY = always print successful substitutions, even if
+ * the line is going to be printed anyway (line will be printed
+ * twice).
+ *
+ * -n AND s///p = print ONLY a successful substitution ONE TIME;
+ * no other lines are printed - this is the reason why the 'p'
+ * flag exists in the first place.
+ */
+
+ /* if the user specified that they didn't want anything printed (i.e., a -n
+ * flag and no 'p' flag after the s///), then there's really no point doing
+ * anything here. */
+ if (be_quiet && !sed_cmds[i].sub_p)
+ break;
+
+ /* we print the line once, unless we were told to be quiet */
+ if (!be_quiet)
+ altered = do_subst_command(&sed_cmds[i], line);
+
+ /* we also print the line if we were given the 'p' flag
+ * (this is quite possibly the second printing) */
+ if (sed_cmds[i].sub_p)
+ altered = do_subst_command(&sed_cmds[i], line);
+
+ break;
+
+ case 'a':
+ puts(line);
+ fputs(sed_cmds[i].editline, stdout);
+ altered++;
+ break;
+
+ case 'i':
+ fputs(sed_cmds[i].editline, stdout);
+ break;
+
+ case 'c':
+ /* single-address case */
+ if (sed_cmds[i].end_match == NULL && sed_cmds[i].end_line == 0) {
+ fputs(sed_cmds[i].editline, stdout);
+ }
+ /* multi-address case */
+ else {
+ /* matching text */
+ if (sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
+ fputs(sed_cmds[i].editline, stdout);
+ /* matching line numbers */
+ if (sed_cmds[i].end_line > 0 && sed_cmds[i].end_line == linenum)
+ fputs(sed_cmds[i].editline, stdout);
+ }
+ altered++;
+
+ break;
+
+ case 'r': {
+ FILE *outfile;
+ puts(line);
+ outfile = fopen(sed_cmds[i].filename, "r");
+ if (outfile)
+ print_file(outfile);
+ /* else if we couldn't open the output file,
+ * no biggie, just don't print anything */
+ altered++;
+ }
+ break;
+ }
- /* are we acting on a range of line numbers? */
- else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line != 0) {
- if (linenum >= sed_cmds[i].beg_line &&
- (sed_cmds[i].end_line == -1 || linenum <= sed_cmds[i].end_line))
- line_altered += do_sed_command(&sed_cmds[i], line);
- }
+ /*
+ * exit point from sedding...
+ */
+ if (
+ /* this is a single-address command or... */
+ (sed_cmds[i].end_line == 0 && sed_cmds[i].end_match == NULL) || (
+ /* we were in the middle of our address range (this
+ * isn't the first time through) and.. */
+ (still_in_range == 1) && (
+ /* this line number is the last address we're looking for or... */
+ (sed_cmds[i].end_line && (sed_cmds[i].end_line == linenum)) ||
+ /* this line matches our last address regex */
+ (sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
+ )
+ )
+ ) {
+ /* we're out of our address range */
+ still_in_range = 0;
+ }
- /* are we acting on a specified line number */
- else if (sed_cmds[i].beg_line > 0) {
- if (linenum == sed_cmds[i].beg_line)
- line_altered += do_sed_command(&sed_cmds[i], line);
+ /* didn't hit the exit? then we're still in the middle of an address range */
+ else {
+ still_in_range = 1;
+ }
}
-
- /* not acting on matches or line numbers. act on every line */
- else
- line_altered += do_sed_command(&sed_cmds[i], line);
-
}
/* we will print the line unless we were told to be quiet or if the
* line was altered (via a 'd'elete or 's'ubstitution), in which case
* the altered line was already printed */
- if (!be_quiet && !line_altered)
+ if (!be_quiet && !altered)
puts(line);
free(line);
/*
* returns the index in the string just past where the address ends.
*/
-static int get_address(struct sed_cmd *sed_cmd, const char *str, int *line, regex_t **regex)
+static int get_address(struct sed_cmd *sed_cmd, const char *str, int *linenum, regex_t **regex)
{
char *my_str = strdup(str);
int idx = 0;
idx++;
} while (isdigit(my_str[idx]));
my_str[idx] = 0;
- *line = atoi(my_str);
+ *linenum = atoi(my_str);
}
else if (my_str[idx] == '$') {
- *line = -1;
+ *linenum = -1;
idx++;
}
else if (my_str[idx] == '/') {
if (strchr("pd", cmdstr[idx])) {
idx++;
}
- /* handle (s)ubstitution */
+ /* handle (s)ubstitution command */
else if (sed_cmd->cmd == 's') {
idx += parse_subst_cmd(sed_cmd, &cmdstr[idx]);
}
/* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
- else if (strchr("aic", cmdstr[idx])) {
- if (sed_cmd->end_line || sed_cmd->end_match)
+ else if (strchr("aic", sed_cmd->cmd)) {
+ if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
error_msg_and_die("only a beginning address can be specified for edit commands");
idx += parse_edit_cmd(sed_cmd, &cmdstr[idx]);
}
return altered;
}
-static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
-{
- int altered = 0;
-
- switch (sed_cmd->cmd) {
-
- case 'p':
- puts(line);
- break;
-
- case 'd':
- altered++;
- break;
-
- case 's':
-
- /*
- * Some special cases for 's' printing to make it compliant with
- * GNU sed printing behavior (aka "The -n | s///p Matrix"):
- *
- * -n ONLY = never print anything regardless of any successful
- * substitution
- *
- * s///p ONLY = always print successful substitutions, even if
- * the line is going to be printed anyway (line will be printed
- * twice).
- *
- * -n AND s///p = print ONLY a successful substitution ONE TIME;
- * no other lines are printed - this is the reason why the 'p'
- * flag exists in the first place.
- */
-
- /* if the user specified that they didn't want anything printed (i.e., a -n
- * flag and no 'p' flag after the s///), then there's really no point doing
- * anything here. */
- if (be_quiet && !sed_cmd->sub_p)
- break;
-
- /* we print the line once, unless we were told to be quiet */
- if (!be_quiet)
- altered = do_subst_command(sed_cmd, line);
-
- /* we also print the line if we were given the 'p' flag
- * (this is quite possibly the second printing) */
- if (sed_cmd->sub_p)
- altered = do_subst_command(sed_cmd, line);
-
- break;
-
- case 'a':
- puts(line);
- fputs(sed_cmd->editline, stdout);
- altered++;
- break;
-
- case 'i':
- fputs(sed_cmd->editline, stdout);
- break;
-
- case 'c':
- fputs(sed_cmd->editline, stdout);
- altered++;
- break;
-
- case 'r': {
- FILE *file;
- puts(line);
- file = fopen(sed_cmd->filename, "r");
- if (file)
- print_file(file);
- /* else if we couldn't open the file, no biggie, just don't print anything */
- altered++;
- }
- break;
- }
-
- return altered;
-}
static void process_file(FILE *file)
{
char *line = NULL;
static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
unsigned int still_in_range = 0;
- int line_altered;
+ int altered;
int i;
/* go through every line in the file */
chomp(line);
linenum++;
- line_altered = 0;
+ altered = 0;
/* for every line, go through all the commands */
for (i = 0; i < ncmds; i++) {
- /* are we acting on a range of matched lines? */
- if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
- if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
- line_altered += do_sed_command(&sed_cmds[i], line);
- if (still_in_range && regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
- still_in_range = 0;
- else
- still_in_range = 1;
- }
- }
- /* are we trying to match a single line? */
- else if (sed_cmds[i].beg_match) {
- if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
- line_altered += do_sed_command(&sed_cmds[i], line);
- }
+ /*
+ * entry point into sedding...
+ */
+ if (
+ /* this line number is the first address we're looking for */
+ (sed_cmds[i].beg_line && (sed_cmds[i].beg_line == linenum)) ||
+ /* this line matches our first address regex */
+ (sed_cmds[i].beg_match && (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)) ||
+ /* we are currently within the beginning & ending address range */
+ still_in_range
+ ) {
+
+ /*
+ * actual sedding
+ */
+ switch (sed_cmds[i].cmd) {
+
+ case 'p':
+ puts(line);
+ break;
+
+ case 'd':
+ altered++;
+ break;
+
+ case 's':
+
+ /*
+ * Some special cases for 's' printing to make it compliant with
+ * GNU sed printing behavior (aka "The -n | s///p Matrix"):
+ *
+ * -n ONLY = never print anything regardless of any successful
+ * substitution
+ *
+ * s///p ONLY = always print successful substitutions, even if
+ * the line is going to be printed anyway (line will be printed
+ * twice).
+ *
+ * -n AND s///p = print ONLY a successful substitution ONE TIME;
+ * no other lines are printed - this is the reason why the 'p'
+ * flag exists in the first place.
+ */
+
+ /* if the user specified that they didn't want anything printed (i.e., a -n
+ * flag and no 'p' flag after the s///), then there's really no point doing
+ * anything here. */
+ if (be_quiet && !sed_cmds[i].sub_p)
+ break;
+
+ /* we print the line once, unless we were told to be quiet */
+ if (!be_quiet)
+ altered = do_subst_command(&sed_cmds[i], line);
+
+ /* we also print the line if we were given the 'p' flag
+ * (this is quite possibly the second printing) */
+ if (sed_cmds[i].sub_p)
+ altered = do_subst_command(&sed_cmds[i], line);
+
+ break;
+
+ case 'a':
+ puts(line);
+ fputs(sed_cmds[i].editline, stdout);
+ altered++;
+ break;
+
+ case 'i':
+ fputs(sed_cmds[i].editline, stdout);
+ break;
+
+ case 'c':
+ /* single-address case */
+ if (sed_cmds[i].end_match == NULL && sed_cmds[i].end_line == 0) {
+ fputs(sed_cmds[i].editline, stdout);
+ }
+ /* multi-address case */
+ else {
+ /* matching text */
+ if (sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
+ fputs(sed_cmds[i].editline, stdout);
+ /* matching line numbers */
+ if (sed_cmds[i].end_line > 0 && sed_cmds[i].end_line == linenum)
+ fputs(sed_cmds[i].editline, stdout);
+ }
+ altered++;
+
+ break;
+
+ case 'r': {
+ FILE *outfile;
+ puts(line);
+ outfile = fopen(sed_cmds[i].filename, "r");
+ if (outfile)
+ print_file(outfile);
+ /* else if we couldn't open the output file,
+ * no biggie, just don't print anything */
+ altered++;
+ }
+ break;
+ }
- /* are we acting on a range of line numbers? */
- else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line != 0) {
- if (linenum >= sed_cmds[i].beg_line &&
- (sed_cmds[i].end_line == -1 || linenum <= sed_cmds[i].end_line))
- line_altered += do_sed_command(&sed_cmds[i], line);
- }
+ /*
+ * exit point from sedding...
+ */
+ if (
+ /* this is a single-address command or... */
+ (sed_cmds[i].end_line == 0 && sed_cmds[i].end_match == NULL) || (
+ /* we were in the middle of our address range (this
+ * isn't the first time through) and.. */
+ (still_in_range == 1) && (
+ /* this line number is the last address we're looking for or... */
+ (sed_cmds[i].end_line && (sed_cmds[i].end_line == linenum)) ||
+ /* this line matches our last address regex */
+ (sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
+ )
+ )
+ ) {
+ /* we're out of our address range */
+ still_in_range = 0;
+ }
- /* are we acting on a specified line number */
- else if (sed_cmds[i].beg_line > 0) {
- if (linenum == sed_cmds[i].beg_line)
- line_altered += do_sed_command(&sed_cmds[i], line);
+ /* didn't hit the exit? then we're still in the middle of an address range */
+ else {
+ still_in_range = 1;
+ }
}
-
- /* not acting on matches or line numbers. act on every line */
- else
- line_altered += do_sed_command(&sed_cmds[i], line);
-
}
/* we will print the line unless we were told to be quiet or if the
* line was altered (via a 'd'elete or 's'ubstitution), in which case
* the altered line was already printed */
- if (!be_quiet && !line_altered)
+ if (!be_quiet && !altered)
puts(line);
free(line);
# rpmunpack
-# sed - we can do some one-liners here; probably needs it's own input file
+# sed - we can do some one-liners here, some testing is a little
+# difficult to do in just this space (like a,i,c cmds).
+
+# test ^$ matching
echo foo | sed -ne '/^$/p'
+echo -e "foo\\n\\nbar" | sed -ne '/^$/p'
+
sed -e '/test$/d' testcases
sed -e '/^echo/d' testcases
sed -e '/test/s/dangerous/PELIGROSO/' testcases
+sed -ne '1,/getopt/p' ../pwd.c
+sed -e '/getopt/r ../pwd.c' ../sed.c
+
# setkeycodes
projects / oweals / busybox.git / commitdiff