X-Git-Url: https://www.fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=selector.c;h=0bac7b0a67266dbd12552fc2fdd9998cd824d98c;hb=45b3d87d5ba3d51af217f31dd4db58c90dedac2e;hp=6c0f7f5b41ba84eff4c4bfd580fcc938d2b0410e;hpb=5f733b018c4c16c4cd6ccba602c742989f0ed215;p=selector.git diff --git a/selector.c b/selector.c index 6c0f7f5..0bac7b0 100644 --- a/selector.c +++ b/selector.c @@ -91,7 +91,7 @@ void inject_into_tty_buffer(char *string) { 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); } @@ -111,7 +111,9 @@ int string_to_positive_integer(char *string) { } else error = 1; if(error) { - fprintf(stderr, "Value `%s' is not a positive integer.\n", string); + fprintf(stderr, + "Selector: Value `%s' is not a positive integer.\n", + string); exit(1); } @@ -126,62 +128,78 @@ void error_feedback() { } } -/********************************************************************* - A quick and dirty hash table +/* 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. */ +typedef struct { + int size; + int *entries; +} hash_table_t; + +hash_table_t *new_hash_table(int size) { + int k; + hash_table_t *hash_table; -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; + hash_table = (hash_table_t *) malloc(sizeof(hash_table_t)); + + hash_table->size = size; + hash_table->entries = (int *) 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(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(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; } @@ -232,7 +250,8 @@ void initialize_matcher(int use_regexp, int case_sensitive, 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; @@ -244,8 +263,11 @@ void initialize_matcher(int use_regexp, int case_sensitive, } } - matcher->splitted_patterns = (char *) malloc((strlen(pattern) + 1) * sizeof(char)); - matcher->patterns = (char **) malloc(matcher->nb_patterns * sizeof(char *)); + matcher->splitted_patterns = + (char *) malloc((strlen(pattern) + 1) * sizeof(char)); + + matcher->patterns = + (char **) malloc(matcher->nb_patterns * sizeof(char *)); strcpy(matcher->splitted_patterns, pattern); @@ -322,13 +344,15 @@ void kill_after_cursor(char *buffer, int *position) { /*********************************************************************/ -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++; @@ -340,15 +364,14 @@ int next_visible(int current_line, int nb_lines, char **lines, matcher_t *matche /*********************************************************************/ -/* 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. */ @@ -373,22 +396,30 @@ void update_screen(int *current_focus_line, int *displayed_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); } } @@ -415,17 +446,20 @@ void update_screen(int *current_focus_line, int *displayed_focus_line, } } - /* 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--; @@ -503,7 +537,11 @@ void update_screen(int *current_focus_line, int *displayed_focus_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); @@ -547,6 +585,9 @@ void update_screen(int *current_focus_line, int *displayed_focus_line, 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) { @@ -574,38 +615,39 @@ void update_screen(int *current_focus_line, int *displayed_focus_line, /*********************************************************************/ -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(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] = (char *) 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 */ @@ -616,18 +658,18 @@ void store_line(const char *t, (*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(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); + fprintf(stderr, "Selector: Can not open `%s'.\n", input_filename); exit(1); } @@ -635,9 +677,15 @@ void read_file(const char *input_filename, 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]; @@ -649,19 +697,25 @@ void read_file(const char *input_filename, 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); } + /* 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; } @@ -686,10 +740,11 @@ int main(int argc, char **argv) { int color_fg_highlight, color_bg_highlight; char **lines, **labels; - int nb_lines, hash_table_size, *hash_table; + int nb_lines; + hash_table_t *hash_table; if(!ttyname(STDIN_FILENO)) { - fprintf(stderr, "The standard input is not a tty.\n"); + fprintf(stderr, "Selector: The standard input is not a tty.\n"); exit(1); } @@ -704,7 +759,10 @@ int main(int argc, char **argv) { 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, ""); @@ -795,7 +853,8 @@ int main(int argc, char **argv) { } else if(strcmp(argv[i], "-c") == 0) { - check_opt(argc, argv, i, 4, " "); + check_opt(argc, argv, i, 4, + " "); 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]); @@ -814,68 +873,79 @@ int main(int argc, char **argv) { } 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 .\n"); - fprintf(stderr, "Usage: %s [options] [ [ ...]]\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 \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"); + FILE *out; + if(show_help) { + out = stdout; + } else { + out = stderr; + } + + fprintf(out, "Selector version %s-R%s\n", VERSION, REVISION_NUMBER); + fprintf(out, "Written by Francois Fleuret <francois@fleuret.org>.\n"); + fprintf(out, "\n"); + fprintf(out, "Usage: %s [options] [<filename1> [<filename2> ...]]\n", + argv[0]); + 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"); exit(error); } lines = (char **) 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 */ @@ -907,10 +977,12 @@ int main(int argc, char **argv) { 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)); t = lines[l]; s = labels[l]; @@ -950,7 +1022,8 @@ int main(int argc, char **argv) { color_bg_highlight < 0 || color_bg_highlight >= COLORS) { echo(); endwin(); - fprintf(stderr, "Color numbers have to be between 0 and %d.\n", COLORS - 1); + fprintf(stderr, "Selector: Color numbers have to be between 0 and %d.\n", + COLORS - 1); exit(1); } @@ -1099,7 +1172,9 @@ int main(int argc, char **argv) { } fprintf(out, "\n"); } else { - fprintf(stderr, "Can not open %s for writing.\n", output_filename); + fprintf(stderr, + "Selector: Can not open %s for writing.\n", + output_filename); exit(1); } fclose(out);