#include <stdlib.h>
#include <unistd.h>
#include <string.h>
+#include <errno.h>
#include <ncurses.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <regex.h>
#include <locale.h>
-#define VERSION "1.0"
+#define VERSION "1.0.1"
#define BUFFER_SIZE 4096
int attr_modeline, attr_focus_line, attr_error;
+/********************************************************************/
+
+/* malloc with error checking. */
+
+void *safe_malloc(size_t n) {
+ void *p = malloc(n);
+ if (!p && n != 0) {
+ printf("Can not allocate memory: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ return p;
+}
+
/*********************************************************************/
-void inject_into_tty_buffer(char *string) {
+void inject_into_tty_buffer(char *string, int add_control_qs) {
struct termios oldtio, newtio;
const char *k;
const char control_q = '\021';
void check_opt(int argc, char **argv, int n_opt, int n, const char *help) {
if(n_opt + n >= argc) {
- fprintf(stderr, "Missing argument for %s, expecting %s.\n",
+ fprintf(stderr, "Selector: Missing argument for %s, expecting %s.\n",
argv[n_opt], help);
- exit(1);
+ exit(EXIT_FAILURE);
}
}
} else error = 1;
if(error) {
- fprintf(stderr, "Value `%s' is not a positive integer.\n", string);
- exit(1);
+ fprintf(stderr,
+ "Selector: Value `%s' is not a positive integer.\n",
+ string);
+ exit(EXIT_FAILURE);
}
return result;
}
}
-/*********************************************************************
- A quick and dirty hash table
+void print_help(FILE *out) {
+
+ fprintf(out, "Selector version %s (%s)\n", VERSION, UNAME);
+ fprintf(out, "Written by Francois Fleuret <francois@fleuret.org>.\n");
+ fprintf(out, "\n");
+ fprintf(out, "Usage: selector [options] [<filename1> [<filename2> ...]]\n");
+ fprintf(out, "\n");
+ fprintf(out, " -h show this help\n");
+ fprintf(out, " -v inject the selected line in the tty\n");
+ fprintf(out, " -w quote control characters with ^Qs when using -v\n");
+ fprintf(out, " -d remove duplicated lines\n");
+ fprintf(out, " -b remove the bash history line prefix\n");
+ fprintf(out, " -z remove the zsh history line prefix\n");
+ fprintf(out, " -i invert the order of lines\n");
+ fprintf(out, " -e start in regexp mode\n");
+ fprintf(out, " -a start in case sensitive mode\n");
+ fprintf(out, " -m monochrome mode\n");
+ fprintf(out, " -q make a flash instead of a beep on an edition error\n");
+ fprintf(out, " -- all following arguments are filenames\n");
+ fprintf(out, " -t <title>\n");
+ fprintf(out, " add a title in the modeline\n");
+ fprintf(out, " -c <fg modeline> <bg modeline> <fg highlight> <bg highlight>\n");
+ fprintf(out, " set the display colors\n");
+ fprintf(out, " -o <output filename>\n");
+ fprintf(out, " set a file to write the selected line to\n");
+ fprintf(out, " -s <pattern separator>\n");
+ fprintf(out, " set the symbol to separate substrings in the pattern\n");
+ fprintf(out, " -x <label separator>\n");
+ fprintf(out, " set the symbol to terminate the label\n");
+ fprintf(out, " -l <max number of lines>\n");
+ fprintf(out, " set the maximum number of lines to take into account\n");
+ fprintf(out, "\n");
+}
+
+/*********************************************************************/
+
+/* A quick and dirty hash table */
+
+/* The table itself stores indexes of the strings taken in a char**
+ table. When a string is added, if it was already in the table, the
+ new index replaces the previous one. */
- The table itself stores indexes of the strings taken in a char
- **table. When a string is added, if it was already in the table, the
- new index replaces the previous one. */
+struct hash_table_t {
+ int size;
+ int *entries;
+};
-int *new_hash_table(int hash_table_size) {
- int *result, k;
- result = (int *) malloc(hash_table_size * sizeof(int));
- for(k = 0; k < hash_table_size; k++) {
- result[k] = -1;
+struct hash_table_t *new_hash_table(int size) {
+ int k;
+ struct hash_table_t *hash_table;
+
+ hash_table = safe_malloc(sizeof(struct hash_table_t));
+
+ hash_table->size = size;
+ hash_table->entries = safe_malloc(hash_table->size * sizeof(int));
+
+ for(k = 0; k < hash_table->size; k++) {
+ hash_table->entries[k] = -1;
}
- return result;
+
+ return hash_table;
+}
+
+void free_hash_table(struct hash_table_t *hash_table) {
+ free(hash_table->entries);
+ free(hash_table);
}
/* Adds new_string in the table, associated to new_index. If this
string was not already in the table, returns -1. Otherwise, returns
the previous index it had. */
-int add_and_get_previous_index(const char *new_string, int new_index,
- char **strings,
- int *hash_table, int hash_table_size) {
+int add_and_get_previous_index(struct hash_table_t *hash_table,
+ const char *new_string, int new_index,
+ char **strings) {
unsigned int code = 0;
int k;
/* This is my recipe. I checked, it seems to work (as long as
- hash_table_size is not a multiple of 387433 that should be
+ hash_table->size is not a multiple of 387433 that should be
okay) */
for(k = 0; new_string[k]; k++) {
code = code * 387433 + (unsigned int) (new_string[k]);
}
- code = code % hash_table_size;
+ code = code % hash_table->size;
- while(hash_table[code] >= 0) {
+ while(hash_table->entries[code] >= 0) {
/* There is a string with that code */
- if(strcmp(new_string, strings[hash_table[code]]) == 0) {
+ if(strcmp(new_string, strings[hash_table->entries[code]]) == 0) {
/* It is the same string, we keep a copy of the stored index */
- int result = hash_table[code];
+ int result = hash_table->entries[code];
/* Put the new one */
- hash_table[code] = new_index;
+ hash_table->entries[code] = new_index;
/* And return the previous one */
return result;
}
/* This collision was not the same string, let's move to the next
in the table */
- code = (code + 1) % hash_table_size;
+ code = (code + 1) % hash_table->size;
}
/* This string was not already in there, store the index in the
table and return -1 */
- hash_table[code] = new_index;
+ hash_table->entries[code] = new_index;
return -1;
}
if(use_regexp) {
matcher->nb_patterns = -1;
- matcher->regexp_error = regcomp(&matcher->preg, pattern, case_sensitive ? 0 : REG_ICASE);
+ matcher->regexp_error = regcomp(&matcher->preg, pattern,
+ case_sensitive ? 0 : REG_ICASE);
} else {
matcher->regexp_error = 0;
matcher->nb_patterns = 1;
}
}
- matcher->splitted_patterns = (char *) malloc((strlen(pattern) + 1) * sizeof(char));
- matcher->patterns = (char **) malloc(matcher->nb_patterns * sizeof(char *));
+ matcher->splitted_patterns =
+ safe_malloc((strlen(pattern) + 1) * sizeof(char));
+
+ matcher->patterns =
+ safe_malloc(matcher->nb_patterns * sizeof(char *));
strcpy(matcher->splitted_patterns, pattern);
/*********************************************************************/
-int previous_visible(int current_line, int nb_lines, char **lines, matcher_t *matcher) {
+int previous_visible(int current_line, int nb_lines, char **lines,
+ matcher_t *matcher) {
int line = current_line - 1;
while(line >= 0 && !match(lines[line], matcher)) line--;
return line;
}
-int next_visible(int current_line, int nb_lines, char **lines, matcher_t *matcher) {
+int next_visible(int current_line, int nb_lines, char **lines,
+ matcher_t *matcher) {
int line = current_line + 1;
while(line < nb_lines && !match(lines[line], matcher)) line++;
/*********************************************************************/
-/* The value passed to this routine in current_focus_line is the index
- of the line we should have highlighted if there was no motion and if
- it matched the matcher. So, the line actually highlighted is the
- first one matching the matcher in that order: (1)
- current_focus_line after motion, (2) the first with a greater
- index, (3) the first with a lesser index.
+/* The line highlighted is the first one matching the matcher in that
+ order: (1) current_focus_line after motion, if it does not match,
+ then (2) the first with a greater index, if none matches, then (3)
+ the first with a lesser index.
The index of the line actually shown highlighted is written in
- displayed_focus_line (it can be -1)
+ displayed_focus_line (it can be -1 if no line at all matches the
+ matcher)
If there is a motion and a line is actually shown highlighted, its
value is written in current_focus_line. */
use_default_colors();
+ /* Add an empty line where we will print the modeline at the end */
+
addstr("\n");
- /* First, we find a visible line. */
+ /* If the regexp is erroneous, print a message saying so */
if(matcher.regexp_error) {
attron(attr_error);
addnstr("Regexp syntax error", console_width);
attroff(attr_error);
- } else if(nb_lines > 0) {
+ }
+
+ /* Else, and we do have lines to select from, find a visible line. */
+
+ else if(nb_lines > 0) {
int new_focus_line;
if(match(lines[*current_focus_line], &matcher)) {
new_focus_line = *current_focus_line;
} else {
- new_focus_line = next_visible(*current_focus_line, nb_lines, lines, &matcher);
+ new_focus_line = next_visible(*current_focus_line, nb_lines, lines,
+ &matcher);
if(new_focus_line < 0) {
- new_focus_line = previous_visible(*current_focus_line, nb_lines, lines, &matcher);
+ new_focus_line = previous_visible(*current_focus_line, nb_lines, lines,
+ &matcher);
}
}
}
}
- /* Here new_focus_line is either a line number matching the pattern, or -1 */
+ /* Here new_focus_line is either a line number matching the
+ pattern, or -1 */
if(new_focus_line >= 0) {
- int first_line = new_focus_line, last_line = new_focus_line, nb_match = 1;
+ int first_line = new_focus_line, last_line = new_focus_line;
+ int nb_match = 1;
/* We find the first and last line to show, so that the total of
visible lines between them (them included) is
console_height-1 */
- while(nb_match < console_height-1 && (first_line > 0 || last_line < nb_lines - 1)) {
+ while(nb_match < console_height-1 &&
+ (first_line > 0 || last_line < nb_lines - 1)) {
if(first_line > 0) {
first_line--;
addnstr("No selection", console_width);
attroff(attr_error);
}
- } else {
+ }
+
+ /* Else, print a message saying that there are no lines to select from */
+
+ else {
attron(attr_error);
addnstr("Empty choice", console_width);
attroff(attr_error);
addstr(" ");
}
+ /* Add a few info about the mode we are in (regexp and/or case
+ sensitive) */
+
if(use_regexp || case_sensitive) {
addstr(" [");
if(use_regexp) {
/*********************************************************************/
-void store_line(const char *t,
- int nb_lines_max, int *nb_lines, char **lines,
- int hash_table_size, int *hash_table) {
+void store_line(struct hash_table_t *hash_table,
+ const char *new_line,
+ int *nb_lines, char **lines) {
int dup;
/* Remove the zsh history prefix */
- if(zsh_history && *t == ':') {
- while(*t && *t != ';') t++;
- if(*t == ';') t++;
+ if(zsh_history && *new_line == ':') {
+ while(*new_line && *new_line != ';') new_line++;
+ if(*new_line == ';') new_line++;
}
/* Remove the bash history prefix */
if(bash_history) {
- while(*t == ' ') t++;
- while(*t >= '0' && *t <= '9') t++;
- while(*t == ' ') t++;
+ while(*new_line == ' ') new_line++;
+ while(*new_line >= '0' && *new_line <= '9') new_line++;
+ while(*new_line == ' ') new_line++;
}
/* Check for duplicates with the hash table and insert the line in
the list if necessary */
if(hash_table) {
- dup = add_and_get_previous_index(t, *nb_lines, lines, hash_table, hash_table_size);
+ dup = add_and_get_previous_index(hash_table,
+ new_line, *nb_lines, lines);
} else {
dup = -1;
}
if(dup < 0) {
- lines[*nb_lines] = (char *) malloc((strlen(t) + 1) * sizeof(char));
- strcpy(lines[*nb_lines], t);
+ lines[*nb_lines] = safe_malloc((strlen(new_line) + 1) * sizeof(char));
+ strcpy(lines[*nb_lines], new_line);
} else {
/* The string was already in there, so we do not allocate a new
string but use the pointer to the first occurence of it */
(*nb_lines)++;
}
-void read_file(const char *input_filename,
- int nb_lines_max, int *nb_lines, char **lines,
- int hash_table_size, int *hash_table) {
+void read_file(struct hash_table_t *hash_table,
+ const char *input_filename,
+ int nb_lines_max, int *nb_lines, char **lines) {
char raw_line[BUFFER_SIZE];
- int start, end, k;
+ int start, end, eol, k;
FILE *file;
file = fopen(input_filename, "r");
if(!file) {
- fprintf(stderr, "Can not open `%s'.\n", input_filename);
- exit(1);
+ fprintf(stderr, "Selector: Can not open `%s'.\n", input_filename);
+ exit(EXIT_FAILURE);
}
start = 0;
end = 0;
while(*nb_lines < nb_lines_max && (end > start || !feof(file))) {
- int eol = start;
+ eol = start;
+
+ /* Look for the end of a line in what is already in the buffer */
while(eol < end && raw_line[eol] != '\n') eol++;
+ /* if we did not find the of a line, move what has not been
+ processed and is in the buffer to the beginning of the buffer,
+ fill the buffer with new data from the file, and look for the
+ end of a line */
if(eol == end) {
for(k = 0; k < end - start; k++) {
raw_line[k] = raw_line[k + start];
while(eol < end && raw_line[eol] != '\n') eol++;
}
+ /* The end of the line is the buffer size, which means the line is
+ too long */
+
if(eol == BUFFER_SIZE) {
raw_line[BUFFER_SIZE - 1] = '\0';
- fprintf(stderr, "Line too long (max is %d characters):\n", BUFFER_SIZE);
+ fprintf(stderr, "Selector: Line too long (max is %d characters):\n",
+ BUFFER_SIZE);
fprintf(stderr, raw_line);
fprintf(stderr, "\n");
- exit(1);
+ exit(EXIT_FAILURE);
}
+ /* If we got a line, we replace the carriage return by a \0 to
+ finish the string */
+
raw_line[eol] = '\0';
- store_line(raw_line + start,
- nb_lines_max, nb_lines, lines,
- hash_table_size, hash_table);
+ store_line(hash_table, raw_line + start,
+ nb_lines, lines);
start = eol + 1;
}
int color_fg_highlight, color_bg_highlight;
char **lines, **labels;
- int nb_lines, hash_table_size, *hash_table;
+ int nb_lines;
+ struct hash_table_t *hash_table;
- if(!ttyname(STDIN_FILENO)) {
- fprintf(stderr, "The standard input is not a tty.\n");
- exit(1);
+ if(!isatty(STDIN_FILENO)) {
+ fprintf(stderr, "Selector: The standard input is not a tty.\n");
+ exit(EXIT_FAILURE);
}
color_fg_modeline = COLOR_WHITE;
strcpy(output_filename, "");
i = 1;
- while(!error && !show_help && i < argc && argv[i][0] == '-' && !rest_are_files) {
+
+ while(!error && !show_help &&
+ i < argc &&
+ argv[i][0] == '-' && !rest_are_files) {
if(strcmp(argv[i], "-o") == 0) {
check_opt(argc, argv, i, 1, "<output filename>");
else if(strcmp(argv[i], "-t") == 0) {
check_opt(argc, argv, i, 1, "<title>");
free(title);
- title = (char *) malloc((strlen(argv[i+1]) + 1) * sizeof(char));
+ title = safe_malloc((strlen(argv[i+1]) + 1) * sizeof(char));
strcpy(title, argv[i+1]);
i += 2;
}
}
else if(strcmp(argv[i], "-c") == 0) {
- check_opt(argc, argv, i, 4, "<fg modeline> <bg modeline> <fg highlight> <bg highlight>");
+ check_opt(argc, argv, i, 4,
+ "<fg modeline> <bg modeline> <fg highlight> <bg highlight>");
color_fg_modeline = string_to_positive_integer(argv[i + 1]);
color_bg_modeline = string_to_positive_integer(argv[i + 2]);
color_fg_highlight = string_to_positive_integer(argv[i + 3]);
}
else {
- fprintf(stderr, "Unknown option %s.\n", argv[i]);
+ fprintf(stderr, "Selector: Unknown option %s.\n", argv[i]);
error = 1;
}
}
if(show_help || error) {
- fprintf(stderr, "Selector version %s-R%s\n", VERSION, REVISION_NUMBER);
- fprintf(stderr, "Written by Francois Fleuret <francois@fleuret.org>.\n");
- fprintf(stderr, "Usage: %s [options] [<filename1> [<filename2> ...]]\n", argv[0]);
- fprintf(stderr, "\n");
- fprintf(stderr, " -h show this help\n");
- fprintf(stderr, " -v inject the selected line in the tty\n");
- fprintf(stderr, " -w quote control characters with ^Qs when using -v\n");
- fprintf(stderr, " -d remove duplicated lines\n");
- fprintf(stderr, " -b remove the bash history line prefix\n");
- fprintf(stderr, " -z remove the zsh history line prefix\n");
- fprintf(stderr, " -i invert the order of lines\n");
- fprintf(stderr, " -e start in regexp mode\n");
- fprintf(stderr, " -a start in case sensitive mode\n");
- fprintf(stderr, " -m monochrome mode\n");
- fprintf(stderr, " -q make a flash instead of a beep on an edition error\n");
- fprintf(stderr, " -- all following arguments are filenames\n");
- fprintf(stderr, " -t <title>\n");
- fprintf(stderr, " add a title in the modeline\n");
- fprintf(stderr, " -c <fg modeline> <bg modeline> <fg highlight> <bg highlight>\n");
- fprintf(stderr, " set the display colors\n");
- fprintf(stderr, " -o <output filename>\n");
- fprintf(stderr, " set a file to write the selected line to\n");
- fprintf(stderr, " -s <pattern separator>\n");
- fprintf(stderr, " set the symbol to separate substrings in the pattern\n");
- fprintf(stderr, " -x <label separator>\n");
- fprintf(stderr, " set the symbol to terminate the label\n");
- fprintf(stderr, " -l <max number of lines>\n");
- fprintf(stderr, " set the maximum number of lines to take into account\n");
- fprintf(stderr, "\n");
- exit(error);
+ if(error) {
+ print_help(stderr);
+ exit(EXIT_FAILURE);
+ } else {
+ print_help(stdout);
+ exit(EXIT_SUCCESS);
+ }
}
- lines = (char **) malloc(nb_lines_max * sizeof(char *));
+ lines = safe_malloc(nb_lines_max * sizeof(char *));
nb_lines = 0;
- hash_table_size = nb_lines_max * 10;
- hash_table = 0;
if(remove_duplicates) {
- hash_table = new_hash_table(hash_table_size);
+ hash_table = new_hash_table(nb_lines_max * 10);
+ } else {
+ hash_table = 0;
}
if(input_filename[0]) {
- read_file(input_filename,
- nb_lines_max, &nb_lines, lines,
- hash_table_size, hash_table);
+ read_file(hash_table,
+ input_filename,
+ nb_lines_max, &nb_lines, lines);
}
while(i < argc) {
- read_file(argv[i],
- nb_lines_max, &nb_lines, lines,
- hash_table_size, hash_table);
+ read_file(hash_table,
+ argv[i],
+ nb_lines_max, &nb_lines, lines);
i++;
}
- free(hash_table);
+ if(hash_table) {
+ free_hash_table(hash_table);
+ }
/* Now remove the null strings */
label_separator and transform control characters to printable
ones */
- labels = (char **) malloc(nb_lines * sizeof(char *));
+ labels = safe_malloc(nb_lines * sizeof(char *));
for(l = 0; l < nb_lines; l++) {
char *s, *t;
int e = 0;
const char *u;
t = lines[l];
+
while(*t && *t != label_separator) {
u = unctrl(*t++);
e += strlen(u);
}
- labels[l] = (char *) malloc((e + 1) * sizeof(char));
+
+ labels[l] = safe_malloc((e + 1) * sizeof(char));
t = lines[l];
s = labels[l];
while(*t && *t != label_separator) {
initscr();
cbreak();
noecho();
- /* nonl(); */
intrflush(stdscr, FALSE);
/* So that the arrow keys work */
color_bg_highlight < 0 || color_bg_highlight >= COLORS) {
echo();
endwin();
- fprintf(stderr, "Color numbers have to be between 0 and %d.\n", COLORS - 1);
- exit(1);
+ fprintf(stderr, "Selector: Color numbers have to be between 0 and %d.\n",
+ COLORS - 1);
+ exit(EXIT_FAILURE);
}
init_pair(1, color_fg_modeline, color_bg_modeline);
}
else if(key == '\014') { /* ^L */
- /* I suspect that we may sometime mess up the display */
+ /* I suspect that we may sometime mess up the display, so ^L is
+ here to force a full refresh */
clear();
}
}
if(output_to_vt_buffer && t) {
- inject_into_tty_buffer(t);
+ inject_into_tty_buffer(t, add_control_qs);
}
if(output_filename[0]) {
}
fprintf(out, "\n");
} else {
- fprintf(stderr, "Can not open %s for writing.\n", output_filename);
- exit(1);
+ fprintf(stderr,
+ "Selector: Can not open %s for writing.\n",
+ output_filename);
+ exit(EXIT_FAILURE);
}
fclose(out);
}
free(lines);
free(title);
- exit(0);
+ exit(EXIT_SUCCESS);
}
projects / selector.git / blobdiff