mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
Support grouped commands, i.e. {cmd1;cmd2}
This commit is contained in:
Glenn L McGrath
parent
4c6523a90b
commit
f50ce3135f
189
editors/sed.c
189
editors/sed.c
@ -30,7 +30,8 @@
|
||||
- edit commands: (a)ppend, (i)nsert, (c)hange
|
||||
- file commands: (r)ead
|
||||
- backreferences in substitution expressions (\1, \2...\9)
|
||||
|
||||
- grouped commands: {cmd1;cmd2}
|
||||
|
||||
(Note: Specifying an address (range) to match is *optional*; commands
|
||||
default to the whole pattern space if no specific address match was
|
||||
requested.)
|
||||
@ -226,7 +227,7 @@ static int parse_subst_cmd(sed_cmd_t * const sed_cmd, const char *substr)
|
||||
|
||||
/* verify that the 's' is followed by something. That something
|
||||
* (typically a 'slash') is now our regexp delimiter... */
|
||||
if (!substr[++idx])
|
||||
if (substr[idx] == '\0')
|
||||
error_msg_and_die("bad format in substitution expression");
|
||||
else
|
||||
sed_cmd->delimiter=substr[idx];
|
||||
@ -287,11 +288,6 @@ out:
|
||||
return idx;
|
||||
}
|
||||
|
||||
static void move_back(char *str, int offset)
|
||||
{
|
||||
memmove(str, str + offset, strlen(str + offset) + 1);
|
||||
}
|
||||
|
||||
static int parse_edit_cmd(sed_cmd_t *sed_cmd, const char *editstr)
|
||||
{
|
||||
int i, j;
|
||||
@ -317,15 +313,15 @@ static int parse_edit_cmd(sed_cmd_t *sed_cmd, const char *editstr)
|
||||
* is a-ok.
|
||||
*
|
||||
*/
|
||||
|
||||
if (editstr[1] != '\\' || (editstr[2] != '\n' && editstr[2] != '\r'))
|
||||
if ((*editstr != '\\') || ((editstr[1] != '\n') && (editstr[1] != '\r'))) {
|
||||
error_msg_and_die("bad format in edit expression");
|
||||
}
|
||||
|
||||
/* store the edit line text */
|
||||
sed_cmd->editline = xmalloc(strlen(&editstr[3]) + 2);
|
||||
for (i = 3, j = 0; editstr[i] != '\0' && strchr("\r\n", editstr[i]) == NULL;
|
||||
sed_cmd->editline = xmalloc(strlen(&editstr[2]) + 2);
|
||||
for (i = 2, j = 0; editstr[i] != '\0' && strchr("\r\n", editstr[i]) == NULL;
|
||||
i++, j++) {
|
||||
if (editstr[i] == '\\' && strchr("\n\r", editstr[i+1]) != NULL) {
|
||||
if ((editstr[i] == '\\') && strchr("\n\r", editstr[i+1]) != NULL) {
|
||||
sed_cmd->editline[j] = '\n';
|
||||
i++;
|
||||
} else
|
||||
@ -382,59 +378,6 @@ static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr)
|
||||
|
||||
static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr)
|
||||
{
|
||||
/* parse the command
|
||||
* format is: [addr][,addr]cmd
|
||||
* |----||-----||-|
|
||||
* part1 part2 part3
|
||||
*/
|
||||
|
||||
/* first part (if present) is an address: either a '$', a number or a /regex/ */
|
||||
cmdstr += get_address(&sed_cmd->delimiter, cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
|
||||
|
||||
/* second part (if present) will begin with a comma */
|
||||
if (*cmdstr == ',') {
|
||||
int tmp_idx;
|
||||
cmdstr++;
|
||||
tmp_idx = get_address(&sed_cmd->delimiter, cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
|
||||
if (tmp_idx == 0) {
|
||||
error_msg_and_die("get_address: no address found in string\n"
|
||||
"\t(you probably didn't check the string you passed me)");
|
||||
}
|
||||
cmdstr += tmp_idx;
|
||||
}
|
||||
|
||||
/* skip whitespace before the command */
|
||||
while (isspace(*cmdstr))
|
||||
cmdstr++;
|
||||
|
||||
/* there my be the inversion flag between part2 and part3 */
|
||||
sed_cmd->invert = 0;
|
||||
if (*cmdstr == '!') {
|
||||
sed_cmd->invert = 1;
|
||||
cmdstr++;
|
||||
|
||||
#ifdef SED_FEATURE_STRICT_CHECKING
|
||||
/* According to the spec
|
||||
* It is unspecified whether <blank>s can follow a '!' character,
|
||||
* and conforming applications shall not follow a '!' character
|
||||
* with <blank>s.
|
||||
*/
|
||||
if (isblank(*cmdstr) {
|
||||
error_msg_and_die("blank follows '!'");
|
||||
}
|
||||
#else
|
||||
/* skip whitespace before the command */
|
||||
while (isspace(*cmdstr))
|
||||
cmdstr++;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* last part (mandatory) will be a command */
|
||||
if (*cmdstr == '\0')
|
||||
error_msg_and_die("missing command");
|
||||
|
||||
sed_cmd->cmd = *cmdstr;
|
||||
|
||||
/* if it was a single-letter command that takes no arguments (such as 'p'
|
||||
* or 'd') all we need to do is increment the index past that command */
|
||||
if (strchr("pd=", sed_cmd->cmd)) {
|
||||
@ -456,6 +399,7 @@ static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr)
|
||||
error_msg_and_die("Command only uses one address");
|
||||
cmdstr += parse_file_cmd(sed_cmd, cmdstr);
|
||||
}
|
||||
/* handle grouped commands */
|
||||
else {
|
||||
error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
|
||||
}
|
||||
@ -464,31 +408,105 @@ static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr)
|
||||
return(cmdstr);
|
||||
}
|
||||
|
||||
static void add_cmd_str(const char * const cmdstr)
|
||||
static char *add_cmd(sed_cmd_t *sed_cmd, char *cmdstr)
|
||||
{
|
||||
char *mystr = (char *)cmdstr;
|
||||
|
||||
/* Skip over leading whitespace and semicolons */
|
||||
cmdstr += strspn(cmdstr, semicolon_whitespace);
|
||||
|
||||
do {
|
||||
/* if we ate the whole thing, that means there was just trailing
|
||||
* whitespace or a final / no-op semicolon. either way, get out */
|
||||
if (*cmdstr == '\0') {
|
||||
return(NULL);
|
||||
}
|
||||
|
||||
/* trim leading whitespace and semicolons */
|
||||
move_back(mystr, strspn(mystr, semicolon_whitespace));
|
||||
/* if we ate the whole thing, that means there was just trailing
|
||||
* whitespace or a final / no-op semicolon. either way, get out */
|
||||
if (strlen(mystr) == 0)
|
||||
return;
|
||||
/* if this is a comment, jump past it and keep going */
|
||||
if (mystr[0] == '#') {
|
||||
mystr = strpbrk(mystr, "\n\r");
|
||||
continue;
|
||||
/* if this is a comment, jump past it and keep going */
|
||||
if (*cmdstr == '#') {
|
||||
return(strpbrk(cmdstr, "\n\r"));
|
||||
}
|
||||
|
||||
/* parse the command
|
||||
* format is: [addr][,addr]cmd
|
||||
* |----||-----||-|
|
||||
* part1 part2 part3
|
||||
*/
|
||||
|
||||
/* first part (if present) is an address: either a '$', a number or a /regex/ */
|
||||
cmdstr += get_address(&(sed_cmd->delimiter), cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
|
||||
|
||||
/* second part (if present) will begin with a comma */
|
||||
if (*cmdstr == ',') {
|
||||
int idx;
|
||||
cmdstr++;
|
||||
idx = get_address(&(sed_cmd->delimiter), cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
|
||||
if (idx == 0) {
|
||||
error_msg_and_die("get_address: no address found in string\n"
|
||||
"\t(you probably didn't check the string you passed me)");
|
||||
}
|
||||
/* grow the array */
|
||||
sed_cmds = xrealloc(sed_cmds, sizeof(sed_cmd_t *) * (++ncmds));
|
||||
/* zero new element */
|
||||
sed_cmds[ncmds-1] = xcalloc(1, sizeof(sed_cmd_t));
|
||||
/* load command string into new array element, get remainder */
|
||||
mystr = parse_cmd_str(sed_cmds[ncmds-1], mystr);
|
||||
cmdstr += idx;
|
||||
}
|
||||
|
||||
} while (mystr && strlen(mystr));
|
||||
/* skip whitespace before the command */
|
||||
while (isspace(*cmdstr)) {
|
||||
cmdstr++;
|
||||
}
|
||||
|
||||
/* there my be the inversion flag between part2 and part3 */
|
||||
if (*cmdstr == '!') {
|
||||
sed_cmd->invert = 1;
|
||||
cmdstr++;
|
||||
|
||||
#ifdef SED_FEATURE_STRICT_CHECKING
|
||||
/* According to the spec
|
||||
* It is unspecified whether <blank>s can follow a '!' character,
|
||||
* and conforming applications shall not follow a '!' character
|
||||
* with <blank>s.
|
||||
*/
|
||||
if (isblank(cmdstr[idx]) {
|
||||
error_msg_and_die("blank follows '!'");
|
||||
}
|
||||
#else
|
||||
/* skip whitespace before the command */
|
||||
while (isspace(*cmdstr)) {
|
||||
cmdstr++;
|
||||
}
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
/* last part (mandatory) will be a command */
|
||||
if (*cmdstr == '\0')
|
||||
error_msg_and_die("missing command");
|
||||
|
||||
sed_cmd->cmd = *cmdstr;
|
||||
cmdstr++;
|
||||
|
||||
if (sed_cmd->cmd == '{') {
|
||||
do {
|
||||
char *end_ptr = strpbrk(cmdstr, ";}");
|
||||
*end_ptr = '\0';
|
||||
add_cmd(sed_cmd, cmdstr);
|
||||
cmdstr = end_ptr + 1;
|
||||
} while (*cmdstr != '\0');
|
||||
} else {
|
||||
|
||||
cmdstr = parse_cmd_str(sed_cmd, cmdstr);
|
||||
|
||||
/* Add the command to the command array */
|
||||
sed_cmds = xrealloc(sed_cmds, sizeof(sed_cmd_t) * (++ncmds));
|
||||
sed_cmds[ncmds-1] = xmalloc(sizeof(sed_cmd_t));
|
||||
memcpy(sed_cmds[ncmds-1], sed_cmd, sizeof(sed_cmd_t));
|
||||
}
|
||||
return(cmdstr);
|
||||
}
|
||||
|
||||
static void add_cmd_str(char *cmdstr)
|
||||
{
|
||||
do {
|
||||
sed_cmd_t *sed_cmd;
|
||||
sed_cmd = xcalloc(1, sizeof(sed_cmd_t));
|
||||
cmdstr = add_cmd(sed_cmd, cmdstr);
|
||||
} while (cmdstr && strlen(cmdstr));
|
||||
}
|
||||
|
||||
|
||||
@ -868,7 +886,6 @@ extern int sed_main(int argc, char **argv)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* argv[(optind)..(argc-1)] should be names of file to process. If no
|
||||
* files were specified or '-' was specified, take input from stdin.
|
||||
* Otherwise, we process all the files specified. */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user