/*
* colorize - Read text from standard input stream or file and print
* it colorized through use of ANSI escape sequences
*
* Copyright (c) 2011-2022 Steven Schubiger
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*
*/
#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#define _XOPEN_SOURCE 700
#define _FILE_OFFSET_BITS 64
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#ifndef DEBUG
# define DEBUG 0
#endif
#define str(arg) #arg
#define to_str(arg) str(arg)
#define streq(s1, s2) (strcmp (s1, s2) == 0)
#define strneq(s1, s2, n) (strncmp (s1, s2, n) == 0)
#if !DEBUG
# define xmalloc(size) malloc_wrap(size)
# define xcalloc(nmemb, size) calloc_wrap(nmemb, size)
# define xrealloc(ptr, size) realloc_wrap(ptr, size)
# define xstrdup(str) strdup_wrap(str, NULL, 0)
# define str_concat(str1, str2) str_concat_wrap(str1, str2, NULL, 0)
#else
# define xmalloc(size) malloc_wrap_debug(size, __FILE__, __LINE__)
# define xcalloc(nmemb, size) calloc_wrap_debug(nmemb, size, __FILE__, __LINE__)
# define xrealloc(ptr, size) realloc_wrap_debug(ptr, size, __FILE__, __LINE__)
# define xstrdup(str) strdup_wrap(str, __FILE__, __LINE__)
# define str_concat(str1, str2) str_concat_wrap(str1, str2, __FILE__, __LINE__)
#endif
#define free_null(ptr) free_wrap((void **)&ptr)
#if defined(BUF_SIZE) && (BUF_SIZE <= 0 || BUF_SIZE > 65536)
# undef BUF_SIZE
#endif
#ifndef BUF_SIZE
# define BUF_SIZE 4096
#endif
#define LF 0x01
#define CR 0x02
#define PARTIAL 0x04
#define COUNT_OF(obj, type) (sizeof (obj) / sizeof (type))
#define SKIP_LINE_ENDINGS(flags) ((flags) == (CR|LF) ? 2 : 1)
#define VALID_FILE_TYPE(mode) (S_ISREG (mode) || S_ISLNK (mode) || S_ISFIFO (mode))
#define STACK_VAR(ptr) do { \
stack (&vars_list, &stacked_vars, stacked_vars, ptr, IS_GENERIC); \
} while (false)
#define STACK_FILE(ptr) do { \
stack (&vars_list, &stacked_vars, stacked_vars, ptr, IS_FILE); \
} while (false)
#define RELEASE(ptr) do { \
release (vars_list, stacked_vars, (void **)&ptr); \
} while (false)
#if !DEBUG
# define MEM_ALLOC_FAIL() do { \
fprintf (stderr, "%s: memory allocation failure\n", program_name); \
exit (EXIT_FAILURE); \
} while (false)
#else
# define MEM_ALLOC_FAIL_DEBUG(file, line) do { \
fprintf (stderr, "Memory allocation failure in source file %s, line %u\n", file, line); \
exit (EXIT_FAILURE); \
} while (false)
#endif
#define ABORT_TRACE() \
fprintf (stderr, "Aborting in source file %s, line %u\n", __FILE__, __LINE__); \
abort ();
#define CHECK_COLORS_RANDOM(color1, color2) \
streq (color_names[color1]->name, "random") \
&& (streq (color_names[color2]->name, "none") \
|| streq (color_names[color2]->name, "default"))
#define ALLOC_COMPLETE_PART_LINE 8
#if defined(COLOR_SEP_CHAR_COLON)
# define COLOR_SEP_CHAR ':'
#elif defined(COLOR_SEP_CHAR_SLASH)
# define COLOR_SEP_CHAR '/'
#else
# define COLOR_SEP_CHAR '/'
#endif
#define CONF_FILE ".colorize.conf"
#if DEBUG
# define DEBUG_FILE "debug.txt"
#endif
#define MAX_ATTRIBUTE_CHARS (6 * 2)
#define PROGRAM_NAME "colorize"
#define VERSION "0.66"
typedef enum { false, true } bool;
struct conf {
char *attr;
char *color;
char *exclude_random;
char *omit_color_empty;
char *rainbow_fg;
char *rainbow_bg;
};
enum { DESC_OPTION, DESC_CONF };
struct color_name {
char *name;
char *orig;
};
struct color {
const char *name;
const char *code;
unsigned int index;
};
static unsigned int rainbow_index;
static const struct color fg_colors[] = {
{ "none", NULL, 0 },
{ "black", "30m", 1 },
{ "red", "31m", 2 },
{ "green", "32m", 3 },
{ "yellow", "33m", 4 },
{ "blue", "34m", 5 },
{ "magenta", "35m", 6 },
{ "cyan", "36m", 7 },
{ "white", "37m", 8 },
{ "default", "39m", 9 },
};
static const struct color bg_colors[] = {
{ "none", NULL, 0 },
{ "black", "40m", 1 },
{ "red", "41m", 2 },
{ "green", "42m", 3 },
{ "yellow", "43m", 4 },
{ "blue", "44m", 5 },
{ "magenta", "45m", 6 },
{ "cyan", "46m", 7 },
{ "white", "47m", 8 },
{ "default", "49m", 9 },
};
struct bytes_size {
unsigned int size;
char unit;
};
enum {
FMT_GENERIC,
FMT_STRING,
FMT_QUOTE,
FMT_COLOR,
FMT_RANDOM,
FMT_ERROR,
FMT_FILE,
FMT_TYPE,
FMT_CONF,
FMT_CONF_FILE,
FMT_CONF_INIT,
FMT_RAINBOW
};
static const char *formats[] = {
"%s", /* generic */
"%s '%s'", /* string */
"%s `%s' %s", /* quote */
"%s color '%s' %s", /* color */
"%s color '%s' %s '%s'", /* random */
"less than %lu bytes %s", /* error */
"%s: %s", /* file */
"%s: %s: %s", /* type */
"%s: option '%s' %s", /* conf */
"config file %s: %s", /* conf file */
"%s %s", /* conf init */
"%s color '%s' %s %s" /* rainbow */
};
enum { GENERIC, FOREGROUND = 0, BACKGROUND };
static const struct {
const struct color *entries;
unsigned int count;
const char *desc;
} tables[] = {
{ fg_colors, COUNT_OF (fg_colors, struct color), "foreground" },
{ bg_colors, COUNT_OF (bg_colors, struct color), "background" },
};
static unsigned int opts_set;
enum opt_set {
OPT_ATTR_SET = 0x01,
OPT_EXCLUDE_RANDOM_SET = 0x02,
OPT_OMIT_COLOR_EMPTY_SET = 0x04,
OPT_RAINBOW_FG_SET = 0x08,
OPT_RAINBOW_BG_SET = 0x10
};
static struct {
char *attr;
char *exclude_random;
} opts_arg = { NULL, NULL };
enum {
OPT_ATTR = 1,
OPT_CLEAN,
OPT_CLEAN_ALL,
OPT_CONFIG,
OPT_EXCLUDE_RANDOM,
OPT_OMIT_COLOR_EMPTY,
OPT_RAINBOW_FG,
OPT_RAINBOW_BG,
OPT_HELP,
OPT_VERSION
};
static int opt_type;
static const struct option long_opts[] = {
{ "attr", required_argument, &opt_type, OPT_ATTR },
{ "clean", no_argument, &opt_type, OPT_CLEAN },
{ "clean-all", no_argument, &opt_type, OPT_CLEAN_ALL },
{ "config", required_argument, &opt_type, OPT_CONFIG },
{ "exclude-random", required_argument, &opt_type, OPT_EXCLUDE_RANDOM },
{ "omit-color-empty", no_argument, &opt_type, OPT_OMIT_COLOR_EMPTY },
{ "rainbow-fg", no_argument, &opt_type, OPT_RAINBOW_FG },
{ "rainbow-bg", no_argument, &opt_type, OPT_RAINBOW_BG },
{ "help", no_argument, &opt_type, OPT_HELP },
{ "version", no_argument, &opt_type, OPT_VERSION },
{ NULL, 0, NULL, 0 },
};
enum attr_type {
ATTR_BOLD = 0x01,
ATTR_UNDERSCORE = 0x02,
ATTR_BLINK = 0x04,
ATTR_REVERSE = 0x08,
ATTR_CONCEALED = 0x10
};
struct attr {
const char *name;
unsigned int val;
enum attr_type type;
};
enum var_type {
IS_GENERIC,
IS_FILE,
IS_UNUSED
};
struct var_list {
void *ptr;
enum var_type type;
};
static FILE *stream;
#if DEBUG
static FILE *log;
#endif
static unsigned int stacked_vars;
static struct var_list *vars_list;
static struct {
bool fg;
bool bg;
} rainbow_from_conf = { false, false };
static bool clean;
static bool clean_all;
static bool omit_color_empty;
static bool rainbow_fg;
static bool rainbow_bg;
static char attr[MAX_ATTRIBUTE_CHARS + 1];
static char *exclude;
static const char *program_name;
#if DEBUG
static void print_tstamp (FILE *);
#endif
static void process_opts (int, char **, char **);
static void conf_file_path (char **);
static void process_opt_attr (const char *, const bool);
static void write_attr (const struct attr *, unsigned int *, const bool);
static void process_opt_exclude_random (const char *, const bool);
static void parse_conf (const char *, struct conf *);
static void assign_conf (const char *, struct conf *, const char *, char *);
static void init_conf_vars (const char *, const struct conf *);
static void init_conf_boolean (const char *, bool *, const char *, bool *);
static void init_opts_vars (void);
static void print_hint (void);
static void print_help (void);
static void print_version (void);
static void cleanup (void);
static void free_color_names (struct color_name **);
static void free_conf (struct conf *);
static void process_args (unsigned int, char **, char *, const struct color **, const char **, FILE **, struct conf *);
static void process_file_arg (const char *, const char **, FILE **);
static bool skip_path_colors (const char *, const char *, const struct stat *, const bool);
static void gather_color_names (const char *, char *, struct color_name **);
static void read_print_stream (const char *, const struct color **, const char *, FILE *);
static void merge_print_line (const char *, const char *, FILE *);
static void complete_part_line (const char *, char **, FILE *);
static bool get_next_char (char *, const char **, FILE *, bool *);
static void save_char (char, char **, size_t *, size_t *);
static void find_color_entries (struct color_name **, const struct color **);
static void find_color_entry (const struct color_name *, unsigned int, const struct color **);
static void print_line (const char *, const struct color **, const char * const, unsigned int, bool);
static unsigned int get_rainbow_index (const struct color **, unsigned int, unsigned int, unsigned int);
static bool skipable_rainbow_index (const struct color **, unsigned int, unsigned int);
static void print_clean (const char *);
static bool is_esc (const char *);
static const char *get_end_of_esc (const char *);
static const char *get_end_of_text (const char *);
static void print_text (const char *, size_t);
static bool gather_esc_offsets (const char *, const char **, const char **);
static bool validate_esc_clean_all (const char **);
static bool validate_esc_clean (int, unsigned int, unsigned int *, const char **, bool *);
static bool is_reset (int, unsigned int, const char **);
static bool is_attr (int, unsigned int, unsigned int, const char **);
static bool is_fg_color (int, const char **);
static bool is_bg_color (int, unsigned int, const char **);
#if !DEBUG
static void *malloc_wrap (size_t);
static void *calloc_wrap (size_t, size_t);
static void *realloc_wrap (void *, size_t);
#else
static void *malloc_wrap_debug (size_t, const char *, unsigned int);
static void *calloc_wrap_debug (size_t, size_t, const char *, unsigned int);
static void *realloc_wrap_debug (void *, size_t, const char *, unsigned int);
#endif
static void free_wrap (void **);
static char *strdup_wrap (const char *, const char *, unsigned int);
static char *str_concat_wrap (const char *, const char *, const char *, unsigned int);
static char *expand_string (const char *);
static bool get_bytes_size (unsigned long, struct bytes_size *);
static char *get_file_type (mode_t);
static bool has_color_name (const char *, const char *);
static FILE *open_file (const char *, const char *);
static void vfprintf_diag (const char *, ...);
static void vfprintf_fail (const char *, ...);
static void stack (struct var_list **, unsigned int *, unsigned int, void *, enum var_type);
static void release (struct var_list *, unsigned int, void **);
int
main (int argc, char **argv)
{
unsigned int arg_cnt;
const struct color *colors[2] = {
NULL, /* foreground */
NULL, /* background */
};
const char *file = NULL;
char *conf_file = NULL;
struct conf config = { NULL, NULL, NULL, NULL, NULL, NULL };
program_name = argv[0];
atexit (cleanup);
if (fcntl (STDIN_FILENO, F_SETFL, fcntl (STDIN_FILENO, F_GETFL) | O_NONBLOCK) == -1)
{
perror ("fcntl");
exit (EXIT_FAILURE);
}
setvbuf (stdout, NULL, _IOLBF, 0);
#if DEBUG
log = open_file (DEBUG_FILE, "w");
print_tstamp (log);
/* We're in debugging mode, hence we can't invoke STACK_FILE()
prior to print_tstamp(), because both cause text to be written
to the same logfile which is expected to have the timestamp
first. */
STACK_FILE (log);
#endif
attr[0] = '\0';
process_opts (argc, argv, &conf_file);
#ifdef CONF_FILE_TEST
conf_file = to_str (CONF_FILE_TEST);
#elif !defined(TEST)
if (conf_file == NULL)
{
conf_file_path (&conf_file);
STACK_VAR (conf_file);
}
else
{
char *s;
if ((s = expand_string (conf_file)))
{
free (conf_file);
conf_file = s;
}
STACK_VAR (conf_file);
errno = 0;
if (access (conf_file, F_OK) == -1)
vfprintf_fail (formats[FMT_CONF_FILE], conf_file, strerror (errno));
}
#endif
#if defined(CONF_FILE_TEST) || !defined(TEST)
if (access (conf_file, F_OK) != -1)
parse_conf (conf_file, &config);
#endif
init_conf_vars (conf_file, &config);
init_opts_vars ();
#if !defined(CONF_FILE_TEST) && !defined(TEST)
RELEASE (conf_file);
#endif
arg_cnt = argc - optind;
if (clean || clean_all)
{
if (clean && clean_all)
vfprintf_fail (formats[FMT_GENERIC], "--clean and --clean-all switch are mutually exclusive");
if (arg_cnt > 1)
vfprintf_fail ("--clean%s switch cannot be used with more than one file", clean_all ? "-all" : "");
{
unsigned int i;
const struct option_set {
const char *option;
enum opt_set set;
} options[] = {
{ "attr", OPT_ATTR_SET },
{ "exclude-random", OPT_EXCLUDE_RANDOM_SET },
{ "omit-color-empty", OPT_OMIT_COLOR_EMPTY_SET },
{ "rainbow-fg", OPT_RAINBOW_FG_SET },
{ "rainbow-bg", OPT_RAINBOW_BG_SET },
};
for (i = 0; i < COUNT_OF (options, struct option_set); i++)
if (opts_set & options[i].set)
vfprintf_diag ("--%s switch has no meaning with --clean%s", options[i].option, clean_all ? "-all" : "");
}
}
else
{
if (rainbow_fg && rainbow_bg)
vfprintf_fail ("%s and %s are mutually exclusive",
!rainbow_from_conf.fg ? "--rainbow-fg switch" : "rainbow-fg conf option",
!rainbow_from_conf.bg ? "--rainbow-bg switch" : "rainbow-bg conf option"
);
if (arg_cnt == 0 || arg_cnt > 2)
{
vfprintf_diag ("%u arguments provided, expected 1-2 arguments or --clean[-all]", arg_cnt);
print_hint ();
exit (EXIT_FAILURE);
}
}
if (clean || clean_all)
process_file_arg (argv[optind], &file, &stream);
else
process_args (arg_cnt, &argv[optind], &attr[0], colors, &file, &stream, &config);
read_print_stream (&attr[0], colors, file, stream);
free_conf (&config);
RELEASE (exclude);
exit (EXIT_SUCCESS);
}
#if DEBUG
static void
print_tstamp (FILE *log)
{
time_t t;
struct tm *tm;
char str[128];
size_t written;
t = time (NULL);
tm = localtime (&t);
if (tm == NULL)
{
perror ("localtime");
exit (EXIT_FAILURE);
}
written = strftime (str, sizeof (str), "%Y-%m-%d %H:%M:%S %Z", tm);
if (written == 0)
vfprintf_fail (formats[FMT_GENERIC], "strftime: 0 returned");
fprintf (log, "%s\n", str);
while (written--)
fprintf (log, "=");
fprintf (log, "\n");
}
#endif
#define DUP_CONFIG() \
*conf_file = xstrdup (optarg); \
break;
#define PRINT_HELP_EXIT() \
print_help (); \
exit (EXIT_SUCCESS);
#define PRINT_VERSION_EXIT() \
print_version (); \
exit (EXIT_SUCCESS);
static void
process_opts (int argc, char **argv, char **conf_file)
{
int opt;
while ((opt = getopt_long (argc, argv, "c:hV", long_opts, NULL)) != -1)
{
switch (opt)
{
case 0: /* long opts */
switch (opt_type)
{
case OPT_ATTR:
opts_set |= OPT_ATTR_SET;
opts_arg.attr = xstrdup (optarg);
STACK_VAR (opts_arg.attr);
break;
case OPT_CLEAN:
clean = true;
break;
case OPT_CLEAN_ALL:
clean_all = true;
break;
case OPT_CONFIG:
DUP_CONFIG ();
case OPT_EXCLUDE_RANDOM:
opts_set |= OPT_EXCLUDE_RANDOM_SET;
opts_arg.exclude_random = xstrdup (optarg);
STACK_VAR (opts_arg.exclude_random);
break;
case OPT_OMIT_COLOR_EMPTY:
opts_set |= OPT_OMIT_COLOR_EMPTY_SET;
break;
case OPT_RAINBOW_FG:
opts_set |= OPT_RAINBOW_FG_SET;
break;
case OPT_RAINBOW_BG:
opts_set |= OPT_RAINBOW_BG_SET;
break;
case OPT_HELP:
PRINT_HELP_EXIT ();
case OPT_VERSION:
PRINT_VERSION_EXIT ();
default: /* never reached */
ABORT_TRACE ();
}
break;
case 'c':
DUP_CONFIG ();
case 'h':
PRINT_HELP_EXIT ();
case 'V':
PRINT_VERSION_EXIT ();
case '?':
print_hint ();
exit (EXIT_FAILURE);
default: /* never reached */
ABORT_TRACE ();
}
}
}
static void
conf_file_path (char **conf_file)
{
char *path;
uid_t uid;
struct passwd *passwd;
size_t size;
uid = getuid ();
errno = 0;
if ((passwd = getpwuid (uid)) == NULL)
{
if (errno == 0)
vfprintf_diag ("password file entry for uid %lu not found", (unsigned long)uid);
else
perror ("getpwuid");
exit (EXIT_FAILURE);
}
/* getpwuid() leaks memory */
size = strlen (passwd->pw_dir) + 1 + strlen (CONF_FILE) + 1;
path = xmalloc (size);
snprintf (path, size, "%s/%s", passwd->pw_dir, CONF_FILE);
*conf_file = path;
}
static void
process_opt_attr (const char *p, const bool is_opt)
{
/* If attributes are added to this "list", also increase MAX_ATTRIBUTE_CHARS! */
const struct attr attrs[] = {
{ "bold", 1, ATTR_BOLD },
{ "underscore", 4, ATTR_UNDERSCORE },
{ "blink", 5, ATTR_BLINK },
{ "reverse", 7, ATTR_REVERSE },
{ "concealed", 8, ATTR_CONCEALED },
};
unsigned int attr_types = 0;
const char *desc_type[2] = { "--attr switch", "attr conf option" };
const unsigned int DESC_TYPE = is_opt ? DESC_OPTION : DESC_CONF;
while (*p)
{
const char *s;
if (!isalnum ((unsigned char)*p))
vfprintf_fail ("%s must be provided a string", desc_type[DESC_TYPE]);
s = p;
while (isalnum ((unsigned char)*p))
p++;
if (*p != '\0' && *p != ',')
vfprintf_fail ("%s must have strings separated by ,", desc_type[DESC_TYPE]);
else
{
bool valid_attr = false;
unsigned int i;
for (i = 0; i < COUNT_OF (attrs, struct attr); i++)
{
const size_t name_len = strlen (attrs[i].name);
if ((size_t)(p - s) == name_len && strneq (s, attrs[i].name, name_len))
{
write_attr (&attrs[i], &attr_types, is_opt);
valid_attr = true;
break;
}
}
if (!valid_attr)
{
char *attr_invalid = xmalloc ((p - s) + 1);
STACK_VAR (attr_invalid);
strncpy (attr_invalid, s, p - s);
attr_invalid[p - s] = '\0';
vfprintf_fail ("%s attribute '%s' is not valid", desc_type[DESC_TYPE], attr_invalid);
RELEASE (attr_invalid); /* never reached */
}
}
if (*p)
p++;
}
}
static void
write_attr (const struct attr *attr_i, unsigned int *attr_types, const bool is_opt)
{
const unsigned int val = attr_i->val;
const enum attr_type attr_type = attr_i->type;
const char *attr_name = attr_i->name;
if (*attr_types & attr_type)
vfprintf_fail ("%s has attribute '%s' twice or more",
is_opt ? "--attr switch" : "attr conf option", attr_name);
snprintf (attr + strlen (attr), 3, "%u;", val);
*attr_types |= attr_type;
}
static void
process_opt_exclude_random (const char *s, const bool is_opt)
{
bool valid = false;
unsigned int i;
RELEASE (exclude);
exclude = xstrdup (s);
STACK_VAR (exclude);
for (i = 1; i < tables[GENERIC].count - 1; i++) /* skip color none and default */
{
const struct color *entry = &tables[GENERIC].entries[i];
if (streq (exclude, entry->name))
{
valid = true;
break;
}
}
if (!valid)
vfprintf_fail ("%s must be provided a plain color",
is_opt ? "--exclude-random switch" : "exclude-random conf option");
}
static void
init_opts_vars (void)
{
if (opts_set & OPT_ATTR_SET)
{
attr[0] = '\0'; /* Clear attr string to discard values from the config file. */
process_opt_attr (opts_arg.attr, true);
}
if (opts_set & OPT_EXCLUDE_RANDOM_SET)
process_opt_exclude_random (opts_arg.exclude_random, true);
if (opts_set & OPT_OMIT_COLOR_EMPTY_SET)
omit_color_empty = true;
if (opts_set & OPT_RAINBOW_FG_SET)
rainbow_fg = true;
if (opts_set & OPT_RAINBOW_BG_SET)
rainbow_bg = true;
RELEASE (opts_arg.attr);
RELEASE (opts_arg.exclude_random);
}
#define IS_SPACE(c) ((c) == ' ' || (c) == '\t')
static void
parse_conf (const char *conf_file, struct conf *config)
{
unsigned int cnt = 0;
char line[256 + 1];
FILE *conf;
conf = open_file (conf_file, "r");
STACK_FILE (conf);
while (fgets (line, sizeof (line), conf))
{
char *cfg, *val;
char *assign, *comment, *opt, *value;
char *p;
cnt++;
if ((p = strchr (line, '\r')) && *(p + 1) != '\n')
vfprintf_fail ("%s: CR ending of line %u is not supported, switch to CRLF/LF instead", conf_file, cnt);
if (strlen (line) > (sizeof (line) - 2))
vfprintf_fail ("%s: line %u exceeds maximum of %u characters", conf_file, cnt, (unsigned int)(sizeof (line) - 2));
if ((p = strpbrk (line, "\n\r")))
*p = '\0';
/* NAME PARSING (start) */
p = line;
/* skip leading spaces and tabs for name */
while (IS_SPACE (*p))
p++;
/* skip line if a) string end, b) comment, [cd]) newline */
if (*p == '\0' || *p == '#' || *p == '\n' || *p == '\r')
continue;
opt = p;
if (!(assign = strchr (opt, '='))) /* check for = */
{
char *s;
if ((s = strpbrk (opt, "# ")))
*s = '\0';
vfprintf_fail (formats[FMT_CONF], conf_file, opt, "not followed by =");
}
p = assign;
/* skip trailing spaces and tabs for name */
while (IS_SPACE (*(p - 1)))
p--;
*p = '\0';
/* NAME PARSING (end) */
/* NAME VALIDATION (start) */
for (p = opt; *p; p++)
if (!isalnum ((unsigned char)*p) && *p != '-')
vfprintf_fail (formats[FMT_CONF], conf_file, opt, "cannot be made of non-option characters");
/* NAME VALIDATION (end) */
/* VALUE PARSING (start) */
p = assign + 1;
/* skip leading spaces and tabs for value */
while (IS_SPACE (*p))
p++;
/* skip line if comment */
if (*p == '#')
continue;
value = p;
if ((comment = strchr (p, '#')))
p = comment;
else
p += strlen (p);
/* skip trailing spaces and tabs for value */
while (IS_SPACE (*(p - 1)))
p--;
*p = '\0';
/* VALUE PARSING (end) */
/* save option name */
cfg = xstrdup (opt);
STACK_VAR (cfg);
/* save option value (allow empty ones) */
val = strlen (value) ? xstrdup (value) : NULL;
STACK_VAR (val);
assign_conf (conf_file, config, cfg, val);
RELEASE (cfg);
}
RELEASE (conf);
}
#define ASSIGN_CONF(str,val) do { \
RELEASE (str); \
str = val; \
} while (false)
static void
assign_conf (const char *conf_file, struct conf *config, const char *cfg, char *val)
{
if (streq (cfg, "attr"))
ASSIGN_CONF (config->attr, val);
else if (streq (cfg, "color"))
ASSIGN_CONF (config->color, val);
else if (streq (cfg, "exclude-random"))
ASSIGN_CONF (config->exclude_random, val);
else if (streq (cfg, "omit-color-empty"))
ASSIGN_CONF (config->omit_color_empty, val);
else if (streq (cfg, "rainbow-fg"))
ASSIGN_CONF (config->rainbow_fg, val);
else if (streq (cfg, "rainbow-bg"))
ASSIGN_CONF (config->rainbow_bg, val);
else
vfprintf_fail (formats[FMT_CONF], conf_file, cfg, "not recognized");
}
static void
init_conf_vars (const char *conf_file, const struct conf *config)
{
if (config->attr)
process_opt_attr (config->attr, false);
if (config->exclude_random)
process_opt_exclude_random (config->exclude_random, false);
if (config->omit_color_empty)
init_conf_boolean (config->omit_color_empty, &omit_color_empty, "omit-color-empty", NULL);
if (config->rainbow_fg || config->rainbow_bg)
{
if (config->rainbow_fg && config->rainbow_bg)
vfprintf_fail (formats[FMT_CONF_FILE], conf_file, "rainbow-fg and rainbow-bg option are mutually exclusive");
if (config->rainbow_fg)
init_conf_boolean (config->rainbow_fg, &rainbow_fg, "rainbow-fg", &rainbow_from_conf.fg);
else if (config->rainbow_bg)
init_conf_boolean (config->rainbow_bg, &rainbow_bg, "rainbow-bg", &rainbow_from_conf.bg);
}
}
static void
init_conf_boolean (const char *conf_var, bool *boolean_var, const char *name, bool *seen_opt)
{
if (streq (conf_var, "yes"))
*boolean_var = true;
else if (streq (conf_var, "no"))
*boolean_var = false;
else
vfprintf_fail (formats[FMT_CONF_INIT], name, "conf option is not valid");
if (seen_opt)
*seen_opt = true;
}
static void
print_hint (void)
{
fprintf (stderr, "Type `%s --help' for help screen.\n", program_name);
}
static void
print_help (void)
{
struct opt_data {
const char *name;
const char *short_opt;
const char *arg;
};
const struct opt_data opts_data[] = {
{ "attr", NULL, "=ATTR1,ATTR2,..." },
{ "config", "c", "=PATH" },
{ "exclude-random", NULL, "=COLOR" },
{ "help", "h", NULL },
{ "version", "V", NULL },
};
const struct option *opt = long_opts;
unsigned int i;
printf ("Usage: %s (foreground) OR (foreground)%c(background) OR --clean[-all] [-|file]\n\n", program_name, COLOR_SEP_CHAR);
printf ("\tColors (foreground) (background)\n");
for (i = 0; i < tables[FOREGROUND].count; i++)
{
const struct color *entry = &tables[FOREGROUND].entries[i];
const char *name = entry->name;
const char *code = entry->code;
if (code)
printf ("\t\t{\033[%s#\033[0m} [%c%c]%s%*s%s\n",
code, toupper ((unsigned char)*name), *name, name + 1, 10 - (int)strlen (name), " ", name);
else
printf ("\t\t{-} %s%*s%s\n", name, 13 - (int)strlen (name), " ", name);
}
printf ("\t\t{*} [Rr]%s%*s%s [--exclude-random=]\n", "andom", 10 - (int)strlen ("random"), " ", "random");
printf ("\n\tFirst character of color name in upper case denotes increased intensity,\n");
printf ("\twhereas for lower case colors will be of normal intensity.\n");
printf ("\n\tOptions\n");
for (; opt->name; opt++)
{
const struct opt_data *opt_data = NULL;
unsigned int i;
for (i = 0; i < COUNT_OF (opts_data, struct opt_data); i++)
if (streq (opt->name, opts_data[i].name))
{
opt_data = &opts_data[i];
break;
}
if (opt_data)
{
if (opt_data->short_opt)
printf ("\t\t-%s, --%s", opt_data->short_opt, opt->name);
else
printf ("\t\t --%s", opt->name);
if (opt_data->arg)
printf ("%s", opt_data->arg);
printf ("\n");
}
else
printf ("\t\t --%s\n", opt->name);
}
printf ("\n");
}
static void
print_version (void)
{
#ifdef HAVE_VERSION
# include "version.h"
#else
const char *const version = NULL;
#endif
const char *version_prefix, *version_string;
const char *c_flags, *ld_flags, *cpp_flags;
const char *const desc_flags_unknown = "unknown";
struct bytes_size bytes_size;
bool debug;
#ifdef CFLAGS
c_flags = to_str (CFLAGS);
#else
c_flags = desc_flags_unknown;
#endif
#ifdef LDFLAGS
ld_flags = to_str (LDFLAGS);
#else
ld_flags = desc_flags_unknown;
#endif
#ifdef CPPFLAGS
cpp_flags = to_str (CPPFLAGS);
#else
cpp_flags = desc_flags_unknown;
#endif
#if DEBUG
debug = true;
#else
debug = false;
#endif
version_prefix = version ? "" : "v";
version_string = version ? version : VERSION;
printf ("%s %s%s (compiled at %s, %s)\n", PROGRAM_NAME, version_prefix, version_string, __DATE__, __TIME__);
printf ("Compiler flags: %s\n", c_flags);
printf ("Linker flags: %s\n", ld_flags);
printf ("Preprocessor flags: %s\n", cpp_flags);
if (get_bytes_size (BUF_SIZE, &bytes_size))
{
if (BUF_SIZE % 1024 == 0)
printf ("Buffer size: %u%c\n", bytes_size.size, bytes_size.unit);
else
printf ("Buffer size: %u%c, %u byte%s\n", bytes_size.size, bytes_size.unit,
BUF_SIZE % 1024, BUF_SIZE % 1024 > 1 ? "s" : "");
}
else
printf ("Buffer size: %lu byte%s\n", (unsigned long)BUF_SIZE, BUF_SIZE > 1 ? "s" : "");
printf ("Color separator: '%c'\n", COLOR_SEP_CHAR);
printf ("Debugging: %s\n", debug ? "yes" : "no");
}
static void
cleanup (void)
{
if (stream && fileno (stream) != STDIN_FILENO)
RELEASE (stream);
#if DEBUG
if (log)
RELEASE (log);
#endif
if (vars_list)
{
unsigned int i;
for (i = 0; i < stacked_vars; i++)
{
struct var_list *var = &vars_list[i];
switch (var->type)
{
case IS_GENERIC:
free (var->ptr);
break;
case IS_FILE:
fclose (var->ptr);
break;
case IS_UNUSED:
break;
default: /* never reached */
ABORT_TRACE ();
}
}
free_null (vars_list);
}
}
static void
free_color_names (struct color_name **color_names)
{
unsigned int i;
for (i = 0; color_names[i]; i++)
{
RELEASE (color_names[i]->name);
RELEASE (color_names[i]->orig);
RELEASE (color_names[i]);
}
}
static void
free_conf (struct conf *config)
{
RELEASE (config->attr);
RELEASE (config->color);
RELEASE (config->exclude_random);
RELEASE (config->omit_color_empty);
RELEASE (config->rainbow_fg);
RELEASE (config->rainbow_bg);
}
static void
process_args (unsigned int arg_cnt, char **arg_strings, char *attr, const struct color **colors, const char **file, FILE **stream, struct conf *config)
{
bool has_hyphen, use_conf_color;
int ret;
char *p;
struct stat sb;
struct color_name *color_names[3] = {
NULL, /* foreground */
NULL, /* background */
NULL, /* sentinel value */
};
const char *color_string = arg_cnt >= 1 ? arg_strings[0] : NULL;
const char *file_string = arg_cnt == 2 ? arg_strings[1] : NULL;
assert (color_string != NULL);
has_hyphen = streq (color_string, "-");
if (has_hyphen)
{
if (file_string)
vfprintf_fail (formats[FMT_GENERIC], "hyphen cannot be used as color string");
else if (!config->color)
vfprintf_fail (formats[FMT_GENERIC], "hyphen must be preceded by color string");
}
if (!has_hyphen && (ret = lstat (color_string, &sb)) == 0) /* exists */
/* Ensure that we don't fail if there's a file with one or more
color names in its path. */
use_conf_color = skip_path_colors (color_string, file_string, &sb, !!config->color);
else if (has_hyphen)
use_conf_color = true;
else
use_conf_color = false;
/* Use color from config file. */
if (arg_cnt == 1 && use_conf_color)
{
file_string = color_string;
color_string = config->color;
}
if ((p = strchr (color_string, COLOR_SEP_CHAR)))
{
if (p == color_string)
vfprintf_fail (formats[FMT_STRING], "foreground color missing in string", color_string);
else if (p == color_string + strlen (color_string) - 1)
vfprintf_fail (formats[FMT_STRING], "background color missing in string", color_string);
else if (strchr (++p, COLOR_SEP_CHAR))
vfprintf_fail (formats[FMT_STRING], "one color pair allowed only for string", color_string);
}
gather_color_names (color_string, attr, color_names);
assert (color_names[FOREGROUND] != NULL);
if (color_names[BACKGROUND])
{
unsigned int i;
const unsigned int color_sets[2][2] = { { FOREGROUND, BACKGROUND }, { BACKGROUND, FOREGROUND } };
for (i = 0; i < 2; i++)
{
const unsigned int color1 = color_sets[i][0];
const unsigned int color2 = color_sets[i][1];
if (CHECK_COLORS_RANDOM (color1, color2))
vfprintf_fail (formats[FMT_RANDOM], tables[color1].desc, color_names[color1]->orig, "cannot be combined with", color_names[color2]->orig);
}
}
/* --rainbow-bg */
if (rainbow_bg && !color_names[BACKGROUND])
vfprintf_fail ("background color required with %s", !rainbow_from_conf.bg ? "--rainbow-bg switch" : "rainbow-bg conf option");
/* --rainbow{-fg,-bg} */
if (rainbow_fg || rainbow_bg)
{
unsigned int i;
const unsigned int color_set[2] = { FOREGROUND, BACKGROUND };
for (i = 0; i < 2; i++)
{
const unsigned int color = color_set[i];
if (color_names[color] && (
streq (color_names[color]->name, "none")
|| streq (color_names[color]->name, "default"))
) {
vfprintf_fail (formats[FMT_RAINBOW], tables[color].desc, color_names[color]->orig, "cannot be used with",
rainbow_fg ? !rainbow_from_conf.fg ? "--rainbow-fg switch" : "rainbow-fg conf option"
: !rainbow_from_conf.bg ? "--rainbow-bg switch" : "rainbow-bg conf option"
);
}
}
}
find_color_entries (color_names, colors);
assert (colors[FOREGROUND] != NULL);
free_color_names (color_names);
if (!colors[FOREGROUND]->code && colors[BACKGROUND] && colors[BACKGROUND]->code)
{
struct color_name color_name;
color_name.name = color_name.orig = "default";
find_color_entry (&color_name, FOREGROUND, colors);
assert (colors[FOREGROUND]->code != NULL);
}
process_file_arg (file_string, file, stream);
}
static void
process_file_arg (const char *file_string, const char **file, FILE **stream)
{
if (file_string)
{
if (streq (file_string, "-"))
*stream = stdin;
else
{
const char *file = file_string;
struct stat sb;
int ret;
errno = 0;
ret = stat (file, &sb);
if (ret == -1)
vfprintf_fail (formats[FMT_FILE], file, strerror (errno));
if (!VALID_FILE_TYPE (sb.st_mode))
vfprintf_fail (formats[FMT_TYPE], file, "unrecognized type", get_file_type (sb.st_mode));
*stream = open_file (file, "r");
STACK_FILE (*stream);
}
*file = file_string;
}
else
{
*stream = stdin;
*file = "stdin";
}
assert (*stream != NULL);
assert (*file != NULL);
}
static bool
skip_path_colors (const char *color_string, const char *file_string, const struct stat *sb, const bool has_conf)
{
bool have_file;
unsigned int c;
const char *color = color_string;
const mode_t mode = sb->st_mode;
for (c = 1; c <= 2 && *color; c++)
{
bool matched = false;
unsigned int i;
for (i = 0; i < tables[GENERIC].count; i++)
{
const struct color *entry = &tables[GENERIC].entries[i];
if (has_color_name (color, entry->name))
{
color += strlen (entry->name);
matched = true;
break;
}
}
if (!matched && has_color_name (color, "random"))
{
color += strlen ("random");
matched = true;
}
if (matched && *color == COLOR_SEP_CHAR && *(color + 1))
color++;
else
break;
}
have_file = (*color != '\0');
if (have_file)
{
const char *file_existing = color_string;
if (file_string)
vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "cannot be used as color string");
else
{
if (VALID_FILE_TYPE (mode))
{
if (has_conf)
return true;
vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "must be preceded by color string");
}
else
vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "is not a valid file type");
}
}
return false;
}
static void
gather_color_names (const char *color_string, char *attr, struct color_name **color_names)
{
unsigned int index;
char *color, *p, *str;
str = xstrdup (color_string);
STACK_VAR (str);
for (index = 0, color = str; *color; index++, color = p)
{
char *ch, *sep;
p = NULL;
if ((sep = strchr (color, COLOR_SEP_CHAR)))
{
*sep = '\0';
p = sep + 1;
}
else
p = color + strlen (color);
assert (p != NULL);
for (ch = color; *ch; ch++)
if (!isalpha ((unsigned char)*ch))
vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color, "cannot be made of non-alphabetic characters");
for (ch = color + 1; *ch; ch++)
if (!islower ((unsigned char)*ch))
vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color, "cannot be in mixed lower/upper case");
if (streq (color, "None"))
vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color, "cannot be bold");
if (isupper ((unsigned char)*color))
{
switch (index)
{
case FOREGROUND:
snprintf (attr + strlen (attr), 3, "1;");
break;
case BACKGROUND:
vfprintf_fail (formats[FMT_COLOR], tables[BACKGROUND].desc, color, "cannot be bold");
break;
default: /* never reached */
ABORT_TRACE ();
}
}
color_names[index] = xcalloc (1, sizeof (struct color_name));
STACK_VAR (color_names[index]);
color_names[index]->orig = xstrdup (color);
STACK_VAR (color_names[index]->orig);
for (ch = color; *ch; ch++)
*ch = tolower ((unsigned char)*ch);
color_names[index]->name = xstrdup (color);
STACK_VAR (color_names[index]->name);
}
RELEASE (str);
}
static void
read_print_stream (const char *attr, const struct color **colors, const char *file, FILE *stream)
{
char buf[BUF_SIZE + 1];
unsigned int flags = 0;
while (!feof (stream))
{
size_t bytes_read;
char *eol;
const char *line;
bool sleep = false;
errno = 0;
bytes_read = fread (buf, 1, BUF_SIZE, stream);
if (bytes_read != BUF_SIZE)
{
if (errno == EAGAIN || errno == EWOULDBLOCK)
sleep = true;
else if (fileno (stream) != STDIN_FILENO && ferror (stream))
vfprintf_fail (formats[FMT_ERROR], BUF_SIZE, "read");
}
buf[bytes_read] = '\0';
line = buf;
while ((eol = strpbrk (line, "\n\r")))
{
const bool has_text = (eol > line);
const char *p;
flags &= ~(CR|LF);
if (*eol == '\r')
{
flags |= CR;
if (*(eol + 1) == '\n')
flags |= LF;
}
else if (*eol == '\n')
flags |= LF;
else /* never reached */
vfprintf_fail (formats[FMT_FILE], file, "unrecognized line ending");
p = eol + SKIP_LINE_ENDINGS (flags);
*eol = '\0';
print_line (attr, colors, line, flags,
omit_color_empty ? has_text : true);
line = p;
}
if (feof (stream))
{
if (*line != '\0')
print_line (attr, colors, line, PARTIAL, true);
}
else if (*line != '\0')
{
char *p;
if ((clean || clean_all) && (p = strrchr (line, '\033')))
merge_print_line (line, p, stream);
else if (rainbow_fg || rainbow_bg)
print_line (attr, colors, line, PARTIAL, true);
else
print_line (attr, colors, line, 0, true);
}
if (sleep)
{
/* This entire construct is a bit of a hack...
I don't see /currently/ how it could be properly converted
to using open() and friends with {poll,select}().
It has been tested on older hardware to assert that the
performance loss should only be minimal...
-stsc / 2024-11-03
*/
const struct timespec ts = { 0, 50000000L }; /* pause 50ms */
if (nanosleep (&ts, NULL) == -1)
{
perror ("nanosleep");
exit (EXIT_FAILURE);
}
}
}
}
static void
merge_print_line (const char *line, const char *p, FILE *stream)
{
char *buf = NULL;
char *merged_esc = NULL;
const char *esc = "";
const char char_restore = *p;
complete_part_line (p + 1, &buf, stream);
if (buf)
{
/* form escape sequence */
esc = merged_esc = str_concat (p, buf);
/* shorten partial line accordingly */
*(char *)p = '\0';
free (buf);
}
#ifdef TEST_MERGE_PART_LINE
printf ("%s%s", line, esc);
fflush (stdout);
_exit (EXIT_SUCCESS);
#else
print_clean (line);
*(char *)p = char_restore;
print_clean (esc);
free (merged_esc);
#endif
}
static void
complete_part_line (const char *p, char **buf, FILE *stream)
{
bool got_next_char = false, read_from_stream;
char ch;
size_t i = 0, size;
if (get_next_char (&ch, &p, stream, &read_from_stream))
{
if (ch == '[')
{
if (read_from_stream)
save_char (ch, buf, &i, &size);
}
else
{
if (read_from_stream)
ungetc ((int)ch, stream);
return; /* cancel */
}
}
else
return; /* cancel */
while (get_next_char (&ch, &p, stream, &read_from_stream))
{
if (isdigit (ch) || ch == ';')
{
if (read_from_stream)
save_char (ch, buf, &i, &size);
}
else /* got next character */
{
got_next_char = true;
break;
}
}
if (got_next_char)
{
if (ch == 'm')
{
if (read_from_stream)
save_char (ch, buf, &i, &size);
}
else
{
if (read_from_stream)
ungetc ((int)ch, stream);
return; /* cancel */
}
}
else
return; /* cancel */
}
static bool
get_next_char (char *ch, const char **p, FILE *stream, bool *read_from_stream)
{
if (**p == '\0')
{
int c;
if ((c = fgetc (stream)) != EOF)
{
*ch = (char)c;
*read_from_stream = true;
return true;
}
else
{
*read_from_stream = false;
return false;
}
}
else
{
*ch = **p;
(*p)++;
*read_from_stream = false;
return true;
}
}
static void
save_char (char ch, char **buf, size_t *i, size_t *size)
{
if (!*buf)
{
*size = ALLOC_COMPLETE_PART_LINE;
*buf = xmalloc (*size);
}
/* +1: effective occupied size of buffer */
else if ((*i + 1) == *size)
{
*size *= 2;
*buf = xrealloc (*buf, *size);
}
(*buf)[*i] = ch;
(*buf)[*i + 1] = '\0';
(*i)++;
}
static void
find_color_entries (struct color_name **color_names, const struct color **colors)
{
struct timeval tv;
unsigned int index;
/* randomness */
gettimeofday (&tv, NULL);
srand (tv.tv_usec * tv.tv_sec);
for (index = 0; color_names[index]; index++)
{
const char *color_name = color_names[index]->name;
const unsigned int count = tables[index].count;
const struct color *const color_entries = tables[index].entries;
if (streq (color_name, "random"))
{
bool excludable;
unsigned int i;
do {
excludable = false;
i = rand() % (count - 2) + 1; /* omit color none and default */
switch (index)
{
case FOREGROUND:
/* --exclude-random */
if (exclude && streq (exclude, color_entries[i].name))
excludable = true;
else if (color_names[BACKGROUND] && streq (color_names[BACKGROUND]->name, color_entries[i].name))
excludable = true;
break;
case BACKGROUND:
if (streq (colors[FOREGROUND]->name, color_entries[i].name))
excludable = true;
break;
default: /* never reached */
ABORT_TRACE ();
}
} while (excludable);
colors[index] = (struct color *)&color_entries[i];
}
else
find_color_entry (color_names[index], index, colors);
}
}
static void
find_color_entry (const struct color_name *color_name, unsigned int index, const struct color **colors)
{
bool found = false;
unsigned int i;
const unsigned int count = tables[index].count;
const struct color *const color_entries = tables[index].entries;
for (i = 0; i < count; i++)
if (streq (color_name->name, color_entries[i].name))
{
colors[index] = (struct color *)&color_entries[i];
found = true;
break;
}
if (!found)
vfprintf_fail (formats[FMT_COLOR], tables[index].desc, color_name->orig, "not recognized");
}
static void
print_line (const char *attr, const struct color **colors, const char *const line, unsigned int flags, bool emit_colors)
{
/* --clean[-all] */
if (clean || clean_all)
print_clean (line);
/* skip for --omit-color-empty? */
else if (emit_colors)
{
/* --rainbow{-fg,-bg} */
if (rainbow_fg || rainbow_bg)
{
const unsigned int color_sets[2][2] = { { FOREGROUND, BACKGROUND }, { BACKGROUND, FOREGROUND } };
unsigned int color_iter, color_cmp, set;
unsigned int index, max_index;
if (rainbow_fg)
set = 0;
else if (rainbow_bg)
set = 1;
color_iter = color_sets[set][0];
color_cmp = color_sets[set][1];
max_index = tables[color_iter].count - 2; /* omit color default */
if (rainbow_index == 0)
rainbow_index = colors[color_iter]->index; /* init */
else if (rainbow_index > max_index)
rainbow_index = 1; /* black */
index = get_rainbow_index (colors, color_cmp, rainbow_index, max_index);
colors[color_iter] = (struct color *)&tables[color_iter].entries[index];
if (!(flags & PARTIAL))
rainbow_index = index + 1;
}
/* Foreground color code is guaranteed to be set when background color code is present. */
if (colors[BACKGROUND] && colors[BACKGROUND]->code)
printf ("\033[%s", colors[BACKGROUND]->code);
if (colors[FOREGROUND]->code)
printf ("\033[%s%s%s\033[0m", attr, colors[FOREGROUND]->code, line);
else
printf (formats[FMT_GENERIC], line);
}
if (flags & CR)
putchar ('\r');
if (flags & LF)
putchar ('\n');
}
static unsigned int
get_rainbow_index (const struct color **colors, unsigned int color_cmp, unsigned int index, unsigned int max)
{
if (skipable_rainbow_index (colors, color_cmp, index))
{
if (index + 1 > max)
{
if (skipable_rainbow_index (colors, color_cmp, 1))
return 2;
else
return 1;
}
else
return index + 1;
}
else
return index;
}
static bool
skipable_rainbow_index (const struct color **colors, unsigned int color_cmp, unsigned int index)
{
if (color_cmp == BACKGROUND && !colors[color_cmp])
return false;
return (index == colors[color_cmp]->index);
}
static void
print_clean (const char *line)
{
const char *p = line;
if (is_esc (p))
p = get_end_of_esc (p);
while (*p != '\0')
{
const char *text_start = p;
const char *text_end = get_end_of_text (p);
print_text (text_start, text_end - text_start);
p = get_end_of_esc (text_end);
}
}
static bool
is_esc (const char *p)
{
return gather_esc_offsets (p, NULL, NULL);
}
static const char *
get_end_of_esc (const char *p)
{
const char *esc;
const char *end = NULL;
while ((esc = strchr (p, '\033')))
{
if (gather_esc_offsets (esc, NULL, &end))
break;
p = esc + 1;
}
return end ? end + 1 : p + strlen (p);
}
static const char *
get_end_of_text (const char *p)
{
const char *esc;
const char *start = NULL;
while ((esc = strchr (p, '\033')))
{
if (gather_esc_offsets (esc, &start, NULL))
break;
p = esc + 1;
}
return start ? start : p + strlen (p);
}
static void
print_text (const char *p, size_t len)
{
size_t bytes_written;
bytes_written = fwrite (p, 1, len, stdout);
if (bytes_written != len)
vfprintf_fail (formats[FMT_ERROR], (unsigned long)len, "written");
}
static bool
gather_esc_offsets (const char *p, const char **start, const char **end)
{
/* ESC[ */
if (*p == 27 && *(p + 1) == '[')
{
bool valid = false;
const char *const begin = p;
p += 2;
if (clean_all)
valid = validate_esc_clean_all (&p);
else if (clean)
{
bool check_values;
unsigned int prev_iter, iter;
const char *digit;
prev_iter = iter = 0;
do {
check_values = false;
iter++;
if (!isdigit ((unsigned char)*p))
break;
digit = p;
while (isdigit ((unsigned char)*p))
p++;
if (p - digit > 2)
break;
else /* check range */
{
char val[3];
int value;
unsigned int i;
const unsigned int digits = p - digit;
for (i = 0; i < digits; i++)
val[i] = *digit++;
val[i] = '\0';
value = atoi (val);
valid = validate_esc_clean (value, iter, &prev_iter, &p, &check_values);
}
} while (check_values);
}
if (valid)
{
if (start)
*start = begin;
if (end)
*end = p;
return true;
}
}
return false;
}
static bool
validate_esc_clean_all (const char **p)
{
while (isdigit ((unsigned char)**p) || **p == ';')
(*p)++;
return (**p == 'm');
}
static bool
validate_esc_clean (int value, unsigned int iter, unsigned int *prev_iter, const char **p, bool *check_values)
{
if (is_reset (value, iter, p))
return true;
else if (is_attr (value, iter, *prev_iter, p))
{
(*p)++;
*check_values = true;
*prev_iter = iter;
return false; /* partial escape sequence, need another valid value */
}
else if (is_fg_color (value, p))
return true;
else if (is_bg_color (value, iter, p))
return true;
else
return false;
}
static bool
is_reset (int value, unsigned int iter, const char **p)
{
return (value == 0 && iter == 1 && **p == 'm');
}
static bool
is_attr (int value, unsigned int iter, unsigned int prev_iter, const char **p)
{
return ((value > 0 && value < 10) && (iter - prev_iter == 1) && **p == ';');
}
static bool
is_fg_color (int value, const char **p)
{
return (((value >= 30 && value <= 37) || value == 39) && **p == 'm');
}
static bool
is_bg_color (int value, unsigned int iter, const char **p)
{
return (((value >= 40 && value <= 47) || value == 49) && iter == 1 && **p == 'm');
}
#if !DEBUG
static void *
malloc_wrap (size_t size)
{
void *p = malloc (size);
if (!p)
MEM_ALLOC_FAIL ();
return p;
}
static void *
calloc_wrap (size_t nmemb, size_t size)
{
void *p = calloc (nmemb, size);
if (!p)
MEM_ALLOC_FAIL ();
return p;
}
static void *
realloc_wrap (void *ptr, size_t size)
{
void *p = realloc (ptr, size);
if (!p)
MEM_ALLOC_FAIL ();
return p;
}
#else
static const char *const format_debug = "%s: %10s %7lu bytes [source file %s, line %5u]\n";
static void *
malloc_wrap_debug (size_t size, const char *file, unsigned int line)
{
void *p = malloc (size);
if (!p)
MEM_ALLOC_FAIL_DEBUG (file, line);
fprintf (log, format_debug, program_name, "malloc'ed", (unsigned long)size, file, line);
return p;
}
static void *
calloc_wrap_debug (size_t nmemb, size_t size, const char *file, unsigned int line)
{
void *p = calloc (nmemb, size);
if (!p)
MEM_ALLOC_FAIL_DEBUG (file, line);
fprintf (log, format_debug, program_name, "calloc'ed", (unsigned long)(nmemb * size), file, line);
return p;
}
static void *
realloc_wrap_debug (void *ptr, size_t size, const char *file, unsigned int line)
{
void *p = realloc (ptr, size);
if (!p)
MEM_ALLOC_FAIL_DEBUG (file, line);
fprintf (log, format_debug, program_name, "realloc'ed", (unsigned long)size, file, line);
return p;
}
#endif /* !DEBUG */
static void
free_wrap (void **ptr)
{
free (*ptr);
*ptr = NULL;
}
#if !DEBUG
# define do_malloc(len, file, line) malloc_wrap(len)
#else
# define do_malloc(len, file, line) malloc_wrap_debug(len, file, line)
#endif
static char *
strdup_wrap (const char *str, const char *file, unsigned int line)
{
const size_t len = strlen (str) + 1;
char *p = do_malloc (len, file, line);
strncpy (p, str, len);
return p;
}
static char *
str_concat_wrap (const char *str1, const char *str2, const char *file, unsigned int line)
{
const size_t len = strlen (str1) + strlen (str2) + 1;
char *p, *str;
p = str = do_malloc (len, file, line);
strncpy (p, str1, strlen (str1));
p += strlen (str1);
strncpy (p, str2, strlen (str2));
p += strlen (str2);
*p = '\0';
return str;
}
static char *
expand_string (const char *str)
{
char *s = NULL;
wordexp_t p;
wordexp (str, &p, 0);
if (p.we_wordc >= 1)
s = xstrdup (p.we_wordv[0]);
wordfree (&p);
return s;
}
static bool
get_bytes_size (unsigned long bytes, struct bytes_size *bytes_size)
{
const char *unit, units[] = { '0', 'K', 'M', 'G', '\0' };
unsigned long size = bytes;
if (bytes < 1024)
return false;
unit = units;
while (size >= 1024 && *(unit + 1))
{
size /= 1024;
unit++;
}
bytes_size->size = (unsigned int)size;
bytes_size->unit = *unit;
return true;
}
static char *
get_file_type (mode_t mode)
{
if (S_ISREG (mode))
return "file";
else if (S_ISDIR (mode))
return "directory";
else if (S_ISCHR (mode))
return "character device";
else if (S_ISBLK (mode))
return "block device";
else if (S_ISFIFO (mode))
return "named pipe";
else if (S_ISLNK (mode))
return "symbolic link";
else if (S_ISSOCK (mode))
return "socket";
else
return "file";
}
static bool
has_color_name (const char *str, const char *name)
{
char *p;
assert (strlen (str) > 0);
assert (strlen (name) > 0);
if (!(*str == *name || *str == toupper ((unsigned char)*name)))
return false;
else if (*(name + 1) != '\0'
&& !((p = strstr (str + 1, name + 1)) && p == str + 1))
return false;
else
return true;
}
static FILE *
open_file (const char *file, const char *mode)
{
FILE *stream;
errno = 0;
stream = fopen (file, mode);
if (!stream)
vfprintf_fail (formats[FMT_FILE], file, strerror (errno));
return stream;
}
#define DO_VFPRINTF(fmt) \
va_list ap; \
fprintf (stderr, "%s: ", program_name); \
va_start (ap, fmt); \
vfprintf (stderr, fmt, ap); \
va_end (ap); \
fprintf (stderr, "\n");
static void
vfprintf_diag (const char *fmt, ...)
{
DO_VFPRINTF (fmt);
}
static void
vfprintf_fail (const char *fmt, ...)
{
DO_VFPRINTF (fmt);
exit (EXIT_FAILURE);
}
static void
stack (struct var_list **list, unsigned int *stacked, unsigned int index, void *ptr, enum var_type type)
{
struct var_list *var;
/* nothing to stack */
if (ptr == NULL)
return;
if (!*list)
*list = xmalloc (sizeof (struct var_list));
else
{
unsigned int i;
for (i = 0; i < *stacked; i++)
{
var = &(*list)[i];
if (var->type == IS_UNUSED)
{
var->ptr = ptr;
var->type = type;
return; /* reused */
}
}
*list = xrealloc (*list, (*stacked + 1) * sizeof (struct var_list));
}
var = &(*list)[index];
var->ptr = ptr;
var->type = type;
(*stacked)++;
}
static void
release (struct var_list *list, unsigned int stacked, void **ptr)
{
unsigned int i;
/* nothing to release */
if (*ptr == NULL)
return;
for (i = 0; i < stacked; i++)
{
struct var_list *var = &list[i];
if (var->type != IS_UNUSED
&& var->ptr == *ptr)
{
switch (var->type)
{
case IS_GENERIC:
free (*ptr);
break;
case IS_FILE:
fclose (*ptr);
break;
default: /* never reached */
ABORT_TRACE ();
}
*ptr = NULL;
var->ptr = NULL;
var->type = IS_UNUSED;
return;
}
}
}