/* * wee-string.c - string functions * * Copyright (C) 2003-2014 Sébastien Helleu * * This file is part of WeeChat, the extensible chat client. * * WeeChat 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. * * WeeChat 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 WeeChat. If not, see . */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include #include #include #ifdef HAVE_ICONV #include #endif #ifndef ICONV_CONST #ifdef ICONV_2ARG_IS_CONST #define ICONV_CONST const #else #define ICONV_CONST #endif #endif #include "weechat.h" #include "wee-string.h" #include "wee-config.h" #include "wee-hashtable.h" #include "wee-utf8.h" #include "../gui/gui-color.h" #include "../plugins/plugin.h" #define IS_OCTAL_DIGIT(c) ((c >= '0') && (c <= '7')) #define HEX2DEC(c) (((c >= 'a') && (c <= 'f')) ? c - 'a' + 10 : \ ((c >= 'A') && (c <= 'F')) ? c - 'A' + 10 : \ c - '0') typedef uint32_t string_shared_count_t; struct t_hashtable *string_hashtable_shared = NULL; /* * Defines a "strndup" function for systems where this function does not exist * (FreeBSD and maybe others). */ char * string_strndup (const char *string, int length) { char *result; if ((int)strlen (string) < length) return strdup (string); result = malloc (length + 1); if (!result) return NULL; memcpy (result, string, length); result[length] = '\0'; return result; } /* * Converts string to lower case (locale independent). */ void string_tolower (char *string) { while (string && string[0]) { if ((string[0] >= 'A') && (string[0] <= 'Z')) string[0] += ('a' - 'A'); string = utf8_next_char (string); } } /* * Converts string to upper case (locale independent). */ void string_toupper (char *string) { while (string && string[0]) { if ((string[0] >= 'a') && (string[0] <= 'z')) string[0] -= ('a' - 'A'); string = utf8_next_char (string); } } /* * Compares two strings (locale and case independent). * * Returns: * < 0: string1 < string2 * 0: string1 == string2 * > 0: string1 > string2 */ int string_strcasecmp (const char *string1, const char *string2) { int diff; if (!string1 || !string2) return (string1) ? 1 : ((string2) ? -1 : 0); while (string1[0] && string2[0]) { diff = utf8_charcasecmp (string1, string2); if (diff != 0) return diff; string1 = utf8_next_char (string1); string2 = utf8_next_char (string2); } return (string1[0]) ? 1 : ((string2[0]) ? -1 : 0); } /* * Compares two strings (locale and case independent) using a range. * * The range is the number of chars which can be converted from upper to lower * case. For example 26 = all letters of alphabet, 29 = all letters + 3 chars. * * Examples: * - range = 26: A-Z ==> a-z * - range = 29: A-Z [ \ ] ==> a-z { | } * - range = 30: A-Z [ \ ] ^ ==> a-z { | } ~ * (ranges 29 and 30 are used by some protocols like IRC) * * Returns: * < 0: string1 < string2 * 0: string1 == string2 * > 0: string1 > string2 */ int string_strcasecmp_range (const char *string1, const char *string2, int range) { int diff; if (!string1 || !string2) return (string1) ? 1 : ((string2) ? -1 : 0); while (string1[0] && string2[0]) { diff = utf8_charcasecmp_range (string1, string2, range); if (diff != 0) return diff; string1 = utf8_next_char (string1); string2 = utf8_next_char (string2); } return (string1[0]) ? 1 : ((string2[0]) ? -1 : 0); } /* * Compares two strings with max length (locale and case independent). * * Returns: * < 0: string1 < string2 * 0: string1 == string2 * > 0: string1 > string2 */ int string_strncasecmp (const char *string1, const char *string2, int max) { int count, diff; if (!string1 || !string2) return (string1) ? 1 : ((string2) ? -1 : 0); count = 0; while ((count < max) && string1[0] && string2[0]) { diff = utf8_charcasecmp (string1, string2); if (diff != 0) return diff; string1 = utf8_next_char (string1); string2 = utf8_next_char (string2); count++; } if (count >= max) return 0; else return (string1[0]) ? 1 : ((string2[0]) ? -1 : 0); } /* * Compares two strings with max length (locale and case independent) using a * range. * * The range is the number of chars which can be converted from upper to lower * case. For example 26 = all letters of alphabet, 29 = all letters + 3 chars. * * Examples: * - range = 26: A-Z ==> a-z * - range = 29: A-Z [ \ ] ==> a-z { | } * - range = 30: A-Z [ \ ] ^ ==> a-z { | } ~ * (ranges 29 and 30 are used by some protocols like IRC) * * Returns: * < 0: string1 < string2 * 0: string1 == string2 * > 0: string1 > string2 */ int string_strncasecmp_range (const char *string1, const char *string2, int max, int range) { int count, diff; if (!string1 || !string2) return (string1) ? 1 : ((string2) ? -1 : 0); count = 0; while ((count < max) && string1[0] && string2[0]) { diff = utf8_charcasecmp_range (string1, string2, range); if (diff != 0) return diff; string1 = utf8_next_char (string1); string2 = utf8_next_char (string2); count++; } if (count >= max) return 0; else return (string1[0]) ? 1 : ((string2[0]) ? -1 : 0); } /* * Compares two strings, ignoring some chars. * * Returns: * < 0: string1 < string2 * 0: string1 == string2 * > 0: string1 > string2 */ int string_strcmp_ignore_chars (const char *string1, const char *string2, const char *chars_ignored, int case_sensitive) { int diff; if (!string1 && !string2) return 0; if (!string1 && string2) return -1; if (string1 && !string2) return 1; while (string1 && string1[0] && string2 && string2[0]) { /* skip ignored chars */ while (string1 && string1[0] && strchr (chars_ignored, string1[0])) { string1 = utf8_next_char (string1); } while (string2 && string2[0] && strchr (chars_ignored, string2[0])) { string2 = utf8_next_char (string2); } /* end of one (or both) string(s) ? */ if ((!string1 || !string1[0]) && (!string2 || !string2[0])) return 0; if ((!string1 || !string1[0]) && string2 && string2[0]) return -1; if (string1 && string1[0] && (!string2 || !string2[0])) return 1; /* look at diff */ diff = (case_sensitive) ? (int)string1[0] - (int)string2[0] : utf8_charcasecmp (string1, string2); if (diff != 0) return diff; string1 = utf8_next_char (string1); string2 = utf8_next_char (string2); /* skip ignored chars */ while (string1 && string1[0] && strchr (chars_ignored, string1[0])) { string1 = utf8_next_char (string1); } while (string2 && string2[0] && strchr (chars_ignored, string2[0])) { string2 = utf8_next_char (string2); } } if ((!string1 || !string1[0]) && string2 && string2[0]) return -1; if (string1 && string1[0] && (!string2 || !string2[0])) return 1; return 0; } /* * Searches for a string in another string (locale and case independent). */ char * string_strcasestr (const char *string, const char *search) { int length_search; length_search = utf8_strlen (search); if (!string || !search || (length_search == 0)) return NULL; while (string[0]) { if (string_strncasecmp (string, search, length_search) == 0) return (char *)string; string = utf8_next_char (string); } return NULL; } /* * Checks if a string matches a mask. * * Mask can begin or end with "*", no other "*" are allowed inside mask. * * Returns: * 1: string matches mask * 0: string does not match mask */ int string_match (const char *string, const char *mask, int case_sensitive) { char last, *mask2; int len_string, len_mask, rc; if (!mask || !mask[0]) return 0; /* if mask is "*", then any string matches */ if (strcmp (mask, "*") == 0) return 1; len_string = strlen (string); len_mask = strlen (mask); last = mask[len_mask - 1]; /* mask begins with "*" */ if ((mask[0] == '*') && (last != '*')) { /* not enough chars in string to match */ if (len_string < len_mask - 1) return 0; /* check if end of string matches */ if ((case_sensitive && (strcmp (string + len_string - (len_mask - 1), mask + 1) == 0)) || (!case_sensitive && (string_strcasecmp (string + len_string - (len_mask - 1), mask + 1) == 0))) return 1; /* no match */ return 0; } /* mask ends with "*" */ if ((mask[0] != '*') && (last == '*')) { /* not enough chars in string to match */ if (len_string < len_mask - 1) return 0; /* check if beginning of string matches */ if ((case_sensitive && (strncmp (string, mask, len_mask - 1) == 0)) || (!case_sensitive && (string_strncasecmp (string, mask, len_mask - 1) == 0))) return 1; /* no match */ return 0; } /* mask begins and ends with "*" */ if ((mask[0] == '*') && (last == '*')) { /* not enough chars in string to match */ if (len_string < len_mask - 2) return 0; /* keep only relevant chars in mask for searching string */ mask2 = string_strndup (mask + 1, len_mask - 2); if (!mask2) return 0; /* search string */ rc = ((case_sensitive && strstr (string, mask2)) || (!case_sensitive && string_strcasestr (string, mask2))) ? 1 : 0; /* free and return */ free (mask2); return rc; } /* no "*" at all, compare strings */ if ((case_sensitive && (strcmp (string, mask) == 0)) || (!case_sensitive && (string_strcasecmp (string, mask) == 0))) return 1; /* no match */ return 0; } /* * Expands home in a path. * * Example: "~/file.txt" => "/home/xxx/file.txt" * * Note: result must be freed after use. */ char * string_expand_home (const char *path) { char *ptr_home, *str; int length; if (!path) return NULL; if (!path[0] || (path[0] != '~') || ((path[1] && path[1] != DIR_SEPARATOR_CHAR))) { return strdup (path); } ptr_home = getenv ("HOME"); length = strlen (ptr_home) + strlen (path + 1) + 1; str = malloc (length); if (!str) return strdup (path); snprintf (str, length, "%s%s", ptr_home, path + 1); return str; } /* * Removes quotes at beginning/end of string (ignores spaces if there are before * first quote or after last quote). * * Note: result must be freed after use. */ char * string_remove_quotes (const char *string, const char *quotes) { int length; const char *pos_start, *pos_end; if (!string || !quotes) return NULL; if (!string[0]) return strdup (string); pos_start = string; while (pos_start[0] == ' ') { pos_start++; } length = strlen (string); pos_end = string + length - 1; while ((pos_end[0] == ' ') && (pos_end > pos_start)) { pos_end--; } if (!pos_start[0] || !pos_end[0] || (pos_end <= pos_start)) return strdup (string); if (strchr (quotes, pos_start[0]) && (pos_end[0] == pos_start[0])) { if (pos_end == (pos_start + 1)) return strdup (""); return string_strndup (pos_start + 1, pos_end - pos_start - 1); } return strdup (string); } /* * Strips chars at beginning/end of string. * * Note: result must be freed after use. */ char * string_strip (const char *string, int left, int right, const char *chars) { const char *ptr_start, *ptr_end; if (!string) return NULL; if (!string[0]) return strdup (string); ptr_start = string; ptr_end = string + strlen (string) - 1; if (left) { while (ptr_start[0] && strchr (chars, ptr_start[0])) { ptr_start++; } if (!ptr_start[0]) return strdup (ptr_start); } if (right) { while ((ptr_end >= ptr_start) && strchr (chars, ptr_end[0])) { ptr_end--; } if (ptr_end < ptr_start) return strdup (""); } return string_strndup (ptr_start, ptr_end - ptr_start + 1); } /* * Converts escaped chars to their value. * * Following escaped chars are supported: * \" double quote * \\ backslash * \a alert (BEL) * \b backspace * \e escape * \f form feed * \n new line * \r carriage return * \t horizontal tab * \v vertical tab * \0ooo char as octal value (ooo is 0 to 3 digits) * \xhh char as hexadecimal value (hh is 1 to 2 digits) * \uhhhh unicode char as hexadecimal value (hhhh is 1 to 4 digits) * \Uhhhhhhhh unicode char as hexadecimal value (hhhhhhhh is 1 to 8 digits) * * Note: result must be freed after use. */ char * string_convert_escaped_chars (const char *string) { const unsigned char *ptr_string; char *output, utf_char[16]; int pos_output, i, length; unsigned int value; /* the output length is always <= to string length */ output = malloc (strlen (string) + 1); if (!output) return NULL; pos_output = 0; ptr_string = (const unsigned char *)string; while (ptr_string && ptr_string[0]) { if (ptr_string[0] == '\\') { ptr_string++; switch (ptr_string[0]) { case '"': /* double quote */ output[pos_output++] = '"'; ptr_string++; break; case '\\': /* backslash */ output[pos_output++] = '\\'; ptr_string++; break; case 'a': /* alert */ output[pos_output++] = 7; ptr_string++; break; case 'b': /* backspace */ output[pos_output++] = 8; ptr_string++; break; case 'e': /* escape */ output[pos_output++] = 27; ptr_string++; break; case 'f': /* form feed */ output[pos_output++] = 12; ptr_string++; break; case 'n': /* new line */ output[pos_output++] = 10; ptr_string++; break; case 'r': /* carriage return */ output[pos_output++] = 13; ptr_string++; break; case 't': /* horizontal tab */ output[pos_output++] = 9; ptr_string++; break; case 'v': /* vertical tab */ output[pos_output++] = 11; ptr_string++; break; case '0': /* char as octal value (0 to 3 digits) */ value = 0; for (i = 0; (i < 3) && IS_OCTAL_DIGIT(ptr_string[i + 1]); i++) { value = (value * 8) + (ptr_string[i + 1] - '0'); } output[pos_output++] = value; ptr_string += 1 + i; break; case 'x': /* char as hexadecimal value (1 to 2 digits) */ case 'X': if (isxdigit (ptr_string[1])) { value = 0; for (i = 0; (i < 2) && isxdigit (ptr_string[i + 1]); i++) { value = (value * 16) + HEX2DEC(ptr_string[i + 1]); } output[pos_output++] = value; ptr_string += 1 + i; } else { output[pos_output++] = ptr_string[0]; ptr_string++; } break; case 'u': /* unicode char as hexadecimal (1 to 4 digits) */ case 'U': /* unicode char as hexadecimal (1 to 8 digits) */ if (isxdigit (ptr_string[1])) { value = 0; for (i = 0; (i < ((ptr_string[0] == 'u') ? 4 : 8)) && isxdigit (ptr_string[i + 1]); i++) { value = (value * 16) + HEX2DEC(ptr_string[i + 1]); } utf8_int_string (value, utf_char); if (utf_char[0]) { length = strlen (utf_char); memcpy (output + pos_output, utf_char, length); pos_output += length; } ptr_string += 1 + i; } else { output[pos_output++] = ptr_string[0]; ptr_string++; } break; default: output[pos_output++] = '\\'; output[pos_output++] = ptr_string[0]; ptr_string++; break; } } else { output[pos_output++] = ptr_string[0]; ptr_string++; } } output[pos_output] = '\0'; return output; } /* * Checks if first char of string is a "word char". * * Returns: * 1: first char is a word char * 0: first char is not a word char */ int string_is_word_char (const char *string) { wint_t c = utf8_wide_char (string); if (c == WEOF) return 0; if (iswalnum (c)) return 1; switch (c) { case '-': case '_': case '|': return 1; } /* not a 'word char' */ return 0; } /* * Converts a mask (string with only "*" as wildcard) to a regex, paying * attention to special chars in a regex. */ char * string_mask_to_regex (const char *mask) { char *result; const char *ptr_mask; int index_result; char *regex_special_char = ".[]{}()?+|^$\\"; if (!mask) return NULL; result = malloc ((strlen (mask) * 2) + 1); if (!result) return NULL; result[0] = '\0'; index_result = 0; ptr_mask = mask; while (ptr_mask[0]) { /* '*' in string ? then replace by '.*' */ if (ptr_mask[0] == '*') { result[index_result++] = '.'; result[index_result++] = '*'; } /* special regex char in string ? escape it with '\' */ else if (strchr (regex_special_char, ptr_mask[0])) { result[index_result++] = '\\'; result[index_result++] = ptr_mask[0]; } /* standard char, just copy it */ else result[index_result++] = ptr_mask[0]; ptr_mask++; } /* add final '\0' */ result[index_result] = '\0'; return result; } /* * Extracts flags and regex from a string. * * Format of flags is: (?eins-eins)string * Flags are: * e: POSIX extended regex (REG_EXTENDED) * i: case insensitive (REG_ICASE) * n: match-any-character operators don't match a newline (REG_NEWLINE) * s: support for substring addressing of matches is not required (REG_NOSUB) * * Examples (with default_flags = REG_EXTENDED): * "(?i)toto" : regex "toto", flags = REG_EXTENDED | REG_ICASE * "(?i)toto" : regex "toto", flags = REG_EXTENDED | REG_ICASE * "(?i-e)toto": regex "toto", flags = REG_ICASE */ const char * string_regex_flags (const char *regex, int default_flags, int *flags) { const char *ptr_regex, *ptr_flags; int set_flag, flag; char *pos; ptr_regex = regex; if (flags) *flags = default_flags; while (strncmp (ptr_regex, "(?", 2) == 0) { pos = strchr (ptr_regex, ')'); if (!pos) break; if (!isalpha ((unsigned char)ptr_regex[2]) && (ptr_regex[2] != '-')) break; if (flags) { set_flag = 1; for (ptr_flags = ptr_regex + 2; ptr_flags < pos; ptr_flags++) { flag = 0; switch (ptr_flags[0]) { case '-': set_flag = 0; break; case 'e': flag = REG_EXTENDED; break; case 'i': flag = REG_ICASE; break; case 'n': flag = REG_NEWLINE; break; case 's': flag = REG_NOSUB; break; } if (flag > 0) { if (set_flag) *flags |= flag; else *flags &= ~flag; } } } ptr_regex = pos + 1; } return ptr_regex; } /* * Compiles a regex using optional flags at beginning of string (for format of * flags in regex, see string_regex_flags()). * * Returns: * 0: successful compilation * other value: compilation failed */ int string_regcomp (void *preg, const char *regex, int default_flags) { const char *ptr_regex; int flags; ptr_regex = string_regex_flags (regex, default_flags, &flags); return regcomp ((regex_t *)preg, ptr_regex, flags); } /* * Checks if a string has a highlight (using list of words to highlight). * * Returns: * 1: string has a highlight * 0: string has no highlight */ int string_has_highlight (const char *string, const char *highlight_words) { char *msg, *highlight, *match, *match_pre, *match_post, *msg_pos; char *pos, *pos_end; int end, length, startswith, endswith, wildcard_start, wildcard_end, flags; if (!string || !string[0] || !highlight_words || !highlight_words[0]) return 0; msg = strdup (string); if (!msg) return 0; highlight = strdup (highlight_words); if (!highlight) { free (msg); return 0; } pos = highlight; end = 0; while (!end) { flags = 0; pos = (char *)string_regex_flags (pos, REG_ICASE, &flags); pos_end = strchr (pos, ','); if (!pos_end) { pos_end = strchr (pos, '\0'); end = 1; } /* error parsing string! */ if (!pos_end) { free (msg); free (highlight); return 0; } length = pos_end - pos; pos_end[0] = '\0'; if (length > 0) { if ((wildcard_start = (pos[0] == '*'))) { pos++; length--; } if ((wildcard_end = (*(pos_end - 1) == '*'))) { *(pos_end - 1) = '\0'; length--; } } if (length > 0) { msg_pos = msg; while (1) { match = (flags & REG_ICASE) ? string_strcasestr (msg_pos, pos) : strstr (msg_pos, pos); if (!match) break; match_pre = utf8_prev_char (msg, match); if (!match_pre) match_pre = match - 1; match_post = match + length; startswith = ((match == msg) || (!string_is_word_char (match_pre))); endswith = ((!match_post[0]) || (!string_is_word_char (match_post))); if ((wildcard_start && wildcard_end) || (!wildcard_start && !wildcard_end && startswith && endswith) || (wildcard_start && endswith) || (wildcard_end && startswith)) { /* highlight found! */ free (msg); free (highlight); return 1; } msg_pos = match_post; } } if (!end) pos = pos_end + 1; } free (msg); free (highlight); /* no highlight found */ return 0; } /* * Checks if a string has a highlight using a compiled regular expression (any * match in string must be surrounded by delimiters). */ int string_has_highlight_regex_compiled (const char *string, regex_t *regex) { int rc, startswith, endswith; regmatch_t regex_match; const char *match_pre; if (!string || !regex) return 0; while (string && string[0]) { rc = regexec (regex, string, 1, ®ex_match, 0); /* * no match found: exit the loop (if rm_eo == 0, it is an empty match * at beginning of string: we consider there is no match, to prevent an * infinite loop) */ if ((rc != 0) || (regex_match.rm_so < 0) || (regex_match.rm_eo <= 0)) break; startswith = (regex_match.rm_so == 0); if (!startswith) { match_pre = utf8_prev_char (string, string + regex_match.rm_so); startswith = !string_is_word_char (match_pre); } endswith = 0; if (startswith) { endswith = ((regex_match.rm_eo == (int)strlen (string)) || !string_is_word_char (string + regex_match.rm_eo)); } if (startswith && endswith) return 1; string += regex_match.rm_eo; } /* no highlight found */ return 0; } /* * Checks if a string has a highlight using a regular expression (any match in * string must be surrounded by delimiters). */ int string_has_highlight_regex (const char *string, const char *regex) { regex_t reg; int rc; if (!string || !regex || !regex[0]) return 0; if (string_regcomp (®, regex, REG_EXTENDED | REG_ICASE) != 0) return 0; rc = string_has_highlight_regex_compiled (string, ®); regfree (®); return rc; } /* * Replaces a string by new one in a string. * * Note: result must be freed after use. */ char * string_replace (const char *string, const char *search, const char *replace) { const char *pos; char *new_string; int length1, length2, length_new, count; if (!string || !search || !replace) return NULL; length1 = strlen (search); length2 = strlen (replace); /* count number of strings to replace */ count = 0; pos = string; while (pos && pos[0] && (pos = strstr (pos, search))) { count++; pos += length1; } /* easy: no string to replace! */ if (count == 0) return strdup (string); /* compute needed memory for new string */ length_new = strlen (string) - (count * length1) + (count * length2) + 1; /* allocate new string */ new_string = malloc (length_new); if (!new_string) return strdup (string); /* replace all occurrences */ new_string[0] = '\0'; while (string && string[0]) { pos = strstr (string, search); if (pos) { strncat (new_string, string, pos - string); strcat (new_string, replace); pos += length1; } else strcat (new_string, string); string = pos; } return new_string; } /* * Get replacement string for a regex, using array of "match" * (for more info, see function "string_replace_regex"). * * Note: result must be freed after use. */ char * string_replace_regex_get_replace (const char *string, regmatch_t *regex_match, int last_match, const char *replace, const char reference_char, char *(*callback)(void *data, const char *text), void *callback_data) { int length, length_current, length_add, match; const char *ptr_replace, *ptr_add; char *result, *result2, *modified_replace, *temp, char_replace; /* default length is length*2, it will grow later if needed */ length = (strlen (string) * 2); result = malloc (length + 1); if (!result) return NULL; result[0] = '\0'; length_current = 0; ptr_replace = replace; while (ptr_replace && ptr_replace[0]) { ptr_add = NULL; length_add = 0; modified_replace = NULL; if ((ptr_replace[0] == '\\') && (ptr_replace[1] == reference_char)) { /* escaped reference char */ ptr_add = ptr_replace + 1; length_add = 1; ptr_replace += 2; } else if (ptr_replace[0] == reference_char) { if ((ptr_replace[1] == '+') || isdigit ((unsigned char)ptr_replace[1])) { if (ptr_replace[1] == '+') { /* reference to last match */ match = last_match; ptr_replace += 2; } else { /* reference to match 0 .. 99 */ if (isdigit ((unsigned char)ptr_replace[2])) { match = ((ptr_replace[1] - '0') * 10) + (ptr_replace[2] - '0'); ptr_replace += 3; } else { match = ptr_replace[1] - '0'; ptr_replace += 2; } } if (regex_match[match].rm_so >= 0) { if (callback) { temp = string_strndup (string + regex_match[match].rm_so, regex_match[match].rm_eo - regex_match[match].rm_so); if (temp) { modified_replace = (*callback) (callback_data, temp); if (modified_replace) { ptr_add = modified_replace; length_add = strlen (modified_replace); } free (temp); } } if (!ptr_add) { ptr_add = string + regex_match[match].rm_so; length_add = regex_match[match].rm_eo - regex_match[match].rm_so; } } } else if ((ptr_replace[1] == '.') && (ptr_replace[2] >= 32) && (ptr_replace[2] <= 126) && ((ptr_replace[3] == '+') || isdigit ((unsigned char)ptr_replace[3]))) { char_replace = ptr_replace[2]; if (ptr_replace[3] == '+') { /* reference to last match */ match = last_match; ptr_replace += 4; } else { /* reference to match 0 .. 99 */ if (isdigit ((unsigned char)ptr_replace[4])) { match = ((ptr_replace[3] - '0') * 10) + (ptr_replace[4] - '0'); ptr_replace += 5; } else { match = ptr_replace[3] - '0'; ptr_replace += 4; } } if (regex_match[match].rm_so >= 0) { temp = string_strndup (string + regex_match[match].rm_so, regex_match[match].rm_eo - regex_match[match].rm_so); if (temp) { length_add = utf8_strlen (temp); modified_replace = malloc (length_add + 1); if (modified_replace) { memset (modified_replace, char_replace, length_add); modified_replace[length_add] = '\0'; ptr_add = modified_replace; } free (temp); } } } else { /* just ignore the reference char */ ptr_replace++; } } else { ptr_add = ptr_replace; length_add = utf8_char_size (ptr_replace); ptr_replace += length_add; } if (ptr_add) { if (length_current + length_add > length) { length = (length * 2 >= length_current + length_add) ? length * 2 : length_current + length_add; result2 = realloc (result, length + 1); if (!result2) { if (modified_replace) free (modified_replace); free (result); return NULL; } result = result2; } memcpy (result + length_current, ptr_add, length_add); length_current += length_add; result[length_current] = '\0'; } if (modified_replace) free (modified_replace); } return result; } /* * Replaces text in a string using a regular expression and replacement text. * * The argument "regex" is a pointer to a regex compiled with WeeChat function * string_regcomp (or function regcomp). * * The argument "replace" can contain references to matches: * $0 .. $99 match 0 to 99 (0 is whole match, 1 .. 99 are groups captured) * $+ the last match (with highest number) * $.*N match N (can be '+' or 0 to 99), with all chars replaced by '*' * (the char '*' can be replaced by any char between space (32) * and '~' (126)) * * If the callback is not NULL, it is called for every reference to a match * (except for matches replaced by a char). * If not NULL, the string returned by the callback (which must have been newly * allocated) is used and freed after use. * * Examples: * * string | regex | replace | result * ----------+---------------+-----------+------------- * test foo | test | Z | Z foo * test foo | ^(test +)(.*) | $2 | foo * test foo | ^(test +)(.*) | $1 / $.*2 | test / *** * test foo | ^(test +)(.*) | $.%+ | %%% * * Note: result must be freed after use. */ char * string_replace_regex (const char *string, void *regex, const char *replace, const char reference_char, char *(*callback)(void *data, const char *text), void *callback_data) { char *result, *result2, *str_replace; int length, length_replace, start_offset, i, rc, end, last_match; regmatch_t regex_match[100]; if (!string) return NULL; length = strlen (string) + 1; result = malloc (length); if (!result) return NULL; snprintf (result, length, "%s", string); start_offset = 0; while (result && result[start_offset]) { for (i = 0; i < 100; i++) { regex_match[i].rm_so = -1; } rc = regexec ((regex_t *)regex, result + start_offset, 100, regex_match, 0); /* * no match found: exit the loop (if rm_eo == 0, it is an empty match * at beginning of string: we consider there is no match, to prevent an * infinite loop) */ if ((rc != 0) || (regex_match[0].rm_so < 0) || (regex_match[0].rm_eo <= 0)) { break; } /* adjust the start/end offsets */ last_match = 0; for (i = 0; i < 100; i++) { if (regex_match[i].rm_so >= 0) { last_match = i; regex_match[i].rm_so += start_offset; regex_match[i].rm_eo += start_offset; } } /* check if the regex matched the end of string */ end = !result[regex_match[0].rm_eo]; str_replace = string_replace_regex_get_replace (result, regex_match, last_match, replace, reference_char, callback, callback_data); length_replace = (str_replace) ? strlen (str_replace) : 0; length = regex_match[0].rm_so + length_replace + strlen (result + regex_match[0].rm_eo) + 1; result2 = malloc (length); if (!result2) { free (result); return NULL; } result2[0] = '\0'; if (regex_match[0].rm_so > 0) { memcpy (result2, result, regex_match[0].rm_so); result2[regex_match[0].rm_so] = '\0'; } if (str_replace) strcat (result2, str_replace); strcat (result2, result + regex_match[0].rm_eo); free (result); result = result2; if (str_replace) free (str_replace); if (end) break; start_offset = regex_match[0].rm_so + length_replace; } return result; } /* * Splits a string according to separators. * * This function must not be called directly (call string_split or * string_split_shared instead). * * Examples: * string_split ("abc de fghi", " ", 0, 0, NULL) * ==> array[0] = "abc" * array[1] = "de" * array[2] = "fghi" * array[3] = NULL * string_split ("abc de fghi", " ", 1, 0, NULL) * ==> array[0] = "abc de fghi" * array[1] = "de fghi" * array[2] = "fghi" * array[3] = NULL */ char ** string_split_internal (const char *string, const char *separators, int keep_eol, int num_items_max, int *num_items, int shared) { int i, j, n_items; char *string2, **array; char *ptr, *ptr1, *ptr2; const char *str_shared; if (num_items) *num_items = 0; if (!string || !string[0] || !separators || !separators[0]) return NULL; string2 = string_strip (string, 1, (keep_eol == 2) ? 0 : 1, separators); if (!string2 || !string2[0]) return NULL; /* calculate number of items */ ptr = string2; i = 1; while ((ptr = strpbrk (ptr, separators))) { while (ptr[0] && strchr (separators, ptr[0])) { ptr++; } i++; } n_items = i; if ((num_items_max != 0) && (n_items > num_items_max)) n_items = num_items_max; array = malloc ((n_items + 1) * sizeof (array[0])); if (!array) { free (string2); return NULL; } for (i = 0; i < n_items + 1; i++) { array[i] = NULL; } ptr1 = string2; for (i = 0; i < n_items; i++) { while (ptr1[0] && strchr (separators, ptr1[0])) { ptr1++; } if (i == (n_items - 1)) { ptr2 = strpbrk (ptr1, separators); if (!ptr2) ptr2 = strchr (ptr1, '\0'); } else { if ((ptr2 = strpbrk (ptr1, separators)) == NULL) { if ((ptr2 = strchr (ptr1, '\r')) == NULL) { if ((ptr2 = strchr (ptr1, '\n')) == NULL) { ptr2 = strchr (ptr1, '\0'); } } } } if ((ptr1 == NULL) || (ptr2 == NULL)) { array[i] = NULL; } else { if (ptr2 - ptr1 > 0) { if (keep_eol) { array[i] = (shared) ? (char *)string_shared_get (ptr1) : strdup (ptr1); if (!array[i]) { for (j = 0; j < n_items; j++) { if (array[j]) { if (shared) string_shared_free (array[j]); else free (array[j]); } } free (array); free (string2); return NULL; } } else { array[i] = malloc (ptr2 - ptr1 + 1); if (!array[i]) { for (j = 0; j < n_items; j++) { if (array[j]) { if (shared) string_shared_free (array[j]); else free (array[j]); } } free (array); free (string2); return NULL; } strncpy (array[i], ptr1, ptr2 - ptr1); array[i][ptr2 - ptr1] = '\0'; if (shared) { str_shared = string_shared_get (array[i]); if (!str_shared) { for (j = 0; j < n_items; j++) { if (array[j]) string_shared_free (array[j]); } free (array); free (string2); return NULL; } free (array[i]); array[i] = (char *)str_shared; } } ptr1 = ++ptr2; } else { array[i] = NULL; } } } array[i] = NULL; if (num_items) *num_items = i; free (string2); return array; } /* * Splits a string according to separators. * * For full description, see function string_split_internal. */ char ** string_split (const char *string, const char *separators, int keep_eol, int num_items_max, int *num_items) { return string_split_internal (string, separators, keep_eol, num_items_max, num_items, 0); } /* * Splits a string according to separators, and use shared strings for the * strings in the array returned. * * For full description, see function string_split_internal. */ char ** string_split_shared (const char *string, const char *separators, int keep_eol, int num_items_max, int *num_items) { return string_split_internal (string, separators, keep_eol, num_items_max, num_items, 1); } /* * Splits a string like the shell does for a command with arguments. * * This function is a C conversion of Python class "shlex" * (file: Lib/shlex.py in Python repository) * Doc: http://docs.python.org/3/library/shlex.html * * Copyrights in shlex.py: * Module and documentation by Eric S. Raymond, 21 Dec 1998 * Input stacking and error message cleanup added by ESR, March 2000 * push_source() and pop_source() made explicit by ESR, January 2001. * Posix compliance, split(), string arguments, and * iterator interface by Gustavo Niemeyer, April 2003. * * Note: result must be freed with string_free_split. */ char ** string_split_shell (const char *string, int *num_items) { int temp_len, num_args, add_char_to_temp, add_temp_to_args, quoted; char *string2, *temp, **args, **args2, state, escapedstate; char *ptr_string, *ptr_next, saved_char; if (num_items) *num_items = 0; if (!string) return NULL; string2 = strdup (string); if (!string2) return NULL; /* * prepare "args" with one pointer to NULL, the "args" will be reallocated * later, each time a new argument is added */ num_args = 0; args = malloc ((num_args + 1) * sizeof (args[0])); if (!args) { free (string2); return NULL; } args[0] = NULL; /* prepare a temp string for working (adding chars one by one) */ temp = malloc ((2 * strlen (string)) + 1); if (!temp) { free (string2); free (args); return NULL; } temp[0] = '\0'; temp_len = 0; state = ' '; escapedstate = ' '; quoted = 0; ptr_string = string2; while (ptr_string[0]) { add_char_to_temp = 0; add_temp_to_args = 0; ptr_next = utf8_next_char (ptr_string); saved_char = ptr_next[0]; ptr_next[0] = '\0'; if (state == ' ') { if ((ptr_string[0] == ' ') || (ptr_string[0] == '\t') || (ptr_string[0] == '\r') || (ptr_string[0] == '\n')) { if (temp[0] || quoted) add_temp_to_args = 1; } else if (ptr_string[0] == '\\') { escapedstate = 'a'; state = ptr_string[0]; } else if ((ptr_string[0] == '\'') || (ptr_string[0] == '"')) { state = ptr_string[0]; } else { add_char_to_temp = 1; state = 'a'; } } else if ((state == '\'') || (state == '"')) { quoted = 1; if (ptr_string[0] == state) { state = 'a'; } else if ((state == '"') && (ptr_string[0] == '\\')) { escapedstate = state; state = ptr_string[0]; } else { add_char_to_temp = 1; } } else if (state == '\\') { if (((escapedstate == '\'') || (escapedstate == '"')) && (ptr_string[0] != state) && (ptr_string[0] != escapedstate)) { temp[temp_len] = state; temp_len++; temp[temp_len] = '\0'; } add_char_to_temp = 1; state = escapedstate; } else if (state == 'a') { if ((ptr_string[0] == ' ') || (ptr_string[0] == '\t') || (ptr_string[0] == '\r') || (ptr_string[0] == '\n')) { state = ' '; if (temp[0] || quoted) add_temp_to_args = 1; } else if (ptr_string[0] == '\\') { escapedstate = 'a'; state = ptr_string[0]; } else if ((ptr_string[0] == '\'') || (ptr_string[0] == '"')) { state = ptr_string[0]; } else { add_char_to_temp = 1; } } if (add_char_to_temp) { memcpy (temp + temp_len, ptr_string, ptr_next - ptr_string); temp_len += (ptr_next - ptr_string); temp[temp_len] = '\0'; } if (add_temp_to_args) { num_args++; args2 = realloc (args, (num_args + 1) * sizeof (args[0])); if (!args2) { free (string2); free (temp); return args; } args = args2; args[num_args - 1] = strdup (temp); args[num_args] = NULL; temp[0] = '\0'; temp_len = 0; escapedstate = ' '; quoted = 0; } ptr_next[0] = saved_char; ptr_string = ptr_next; } if (temp[0] || (state != ' ')) { num_args++; args2 = realloc (args, (num_args + 1) * sizeof (args[0])); if (!args2) { free (string2); free (temp); return args; } args = args2; args[num_args - 1] = strdup (temp); args[num_args] = NULL; temp[0] = '\0'; /*temp_len = 0;*/ } free (string2); free (temp); if (num_items) *num_items = num_args; return args; } /* * Frees a split string. */ void string_free_split (char **split_string) { int i; if (split_string) { for (i = 0; split_string[i]; i++) free (split_string[i]); free (split_string); } } /* * Frees a split string (using shared strings). */ void string_free_split_shared (char **split_string) { int i; if (split_string) { for (i = 0; split_string[i]; i++) string_shared_free (split_string[i]); free (split_string); } } /* * Builds a string with a split string. * * Note: result must be free after use. */ char * string_build_with_split_string (const char **split_string, const char *separator) { int i, length, length_separator; char *result; if (!split_string) return NULL; length = 0; length_separator = (separator) ? strlen (separator) : 0; for (i = 0; split_string[i]; i++) { length += strlen (split_string[i]) + length_separator; } result = malloc (length + 1); if (result) { result[0] = '\0'; for (i = 0; split_string[i]; i++) { strcat (result, split_string[i]); if (separator && split_string[i + 1]) strcat (result, separator); } } return result; } /* * Splits a list of commands separated by 'separator' and escaped with '\'. * Empty commands are removed, spaces on the left of each commands are stripped. * * Note: result must be freed with free_multi_command. */ char ** string_split_command (const char *command, char separator) { int nb_substr, arr_idx, str_idx, type; char **array, **array2; char *buffer, *p; const char *ptr; if (!command || !command[0]) return NULL; nb_substr = 1; ptr = command; while ((p = strchr(ptr, separator)) != NULL) { nb_substr++; ptr = ++p; } array = malloc ((nb_substr + 1) * sizeof (array[0])); if (!array) return NULL; buffer = malloc (strlen(command) + 1); if (!buffer) { free (array); return NULL; } ptr = command; str_idx = 0; arr_idx = 0; while(*ptr != '\0') { type = 0; if (*ptr == ';') { if (ptr == command) type = 1; else if ( *(ptr-1) != '\\') type = 1; else if ( *(ptr-1) == '\\') type = 2; } if (type == 1) { buffer[str_idx] = '\0'; str_idx = -1; p = buffer; /* strip white spaces a the beginning of the line */ while (*p == ' ') p++; if (p && p[0]) array[arr_idx++] = strdup (p); } else if (type == 2) buffer[--str_idx] = *ptr; else buffer[str_idx] = *ptr; str_idx++; ptr++; } buffer[str_idx] = '\0'; p = buffer; while (*p == ' ') p++; if (p && p[0]) array[arr_idx++] = strdup (p); array[arr_idx] = NULL; free (buffer); array2 = realloc (array, (arr_idx + 1) * sizeof(array[0])); if (!array2) { if (array) free (array); return NULL; } return array2; } /* * Frees a command split. */ void string_free_split_command (char **split_command) { int i; if (split_command) { for (i = 0; split_command[i]; i++) free (split_command[i]); free (split_command); } } /* * Converts a string to another charset. * * Note: result must be freed after use. */ char * string_iconv (int from_utf8, const char *from_code, const char *to_code, const char *string) { char *outbuf; #ifdef HAVE_ICONV iconv_t cd; char *inbuf, *ptr_inbuf, *ptr_outbuf, *next_char; char *ptr_inbuf_shift; int done; size_t err, inbytesleft, outbytesleft; if (from_code && from_code[0] && to_code && to_code[0] && (string_strcasecmp(from_code, to_code) != 0)) { cd = iconv_open (to_code, from_code); if (cd == (iconv_t)(-1)) outbuf = strdup (string); else { inbuf = strdup (string); if (!inbuf) return NULL; ptr_inbuf = inbuf; inbytesleft = strlen (inbuf); outbytesleft = inbytesleft * 4; outbuf = malloc (outbytesleft + 2); if (!outbuf) return inbuf; ptr_outbuf = outbuf; ptr_inbuf_shift = NULL; done = 0; while (!done) { err = iconv (cd, (ICONV_CONST char **)(&ptr_inbuf), &inbytesleft, &ptr_outbuf, &outbytesleft); if (err == (size_t)(-1)) { switch (errno) { case EINVAL: done = 1; break; case E2BIG: done = 1; break; case EILSEQ: if (from_utf8) { next_char = utf8_next_char (ptr_inbuf); if (next_char) { inbytesleft -= next_char - ptr_inbuf; ptr_inbuf = next_char; } else { inbytesleft--; ptr_inbuf++; } } else { ptr_inbuf++; inbytesleft--; } ptr_outbuf[0] = '?'; ptr_outbuf++; outbytesleft--; break; } } else { if (!ptr_inbuf_shift) { ptr_inbuf_shift = ptr_inbuf; ptr_inbuf = NULL; inbytesleft = 0; } else done = 1; } } if (ptr_inbuf_shift) ptr_inbuf = ptr_inbuf_shift; ptr_outbuf[0] = '\0'; free (inbuf); iconv_close (cd); } } else outbuf = strdup (string); #else /* make C compiler happy */ (void) from_utf8; (void) from_code; (void) to_code; outbuf = strdup (string); #endif /* HAVE_ICONV */ return outbuf; } /* * Converts a string to WeeChat internal storage charset (UTF-8). * * Note: result must be freed after use. */ char * string_iconv_to_internal (const char *charset, const char *string) { char *input, *output; if (!string) return NULL; input = strdup (string); if (!input) return NULL; /* * optimized for UTF-8: if charset is NULL => we use term charset => if * this charset is already UTF-8, then no iconv is needed */ if (local_utf8 && (!charset || !charset[0])) return input; if (utf8_has_8bits (input) && utf8_is_valid (input, NULL)) return input; output = string_iconv (0, (charset && charset[0]) ? charset : weechat_local_charset, WEECHAT_INTERNAL_CHARSET, input); if (!output) return input; utf8_normalize (output, '?'); free (input); return output; } /* * Converts internal string to terminal charset, for display. * * Note: result must be freed after use. */ char * string_iconv_from_internal (const char *charset, const char *string) { char *input, *output; if (!string) return NULL; input = strdup (string); if (!input) return NULL; /* * optimized for UTF-8: if charset is NULL => we use term charset => if * this charset is already UTF-8, then no iconv needed */ if (local_utf8 && (!charset || !charset[0])) return input; utf8_normalize (input, '?'); output = string_iconv (1, WEECHAT_INTERNAL_CHARSET, (charset && charset[0]) ? charset : weechat_local_charset, input); if (!output) return input; free (input); return output; } /* * Encodes a string to terminal charset and calls fprintf. * * Returns: * 1: OK * 0: error */ int string_iconv_fprintf (FILE *file, const char *data, ...) { char *buf2; int rc, num_written; rc = 0; weechat_va_format (data); if (vbuffer) { buf2 = string_iconv_from_internal (NULL, vbuffer); num_written = fprintf (file, "%s", (buf2) ? buf2 : vbuffer); rc = (num_written == (int)strlen ((buf2) ? buf2 : vbuffer)) ? 1 : 0; if (buf2) free (buf2); free (vbuffer); } return rc; } /* * Formats a string with size and unit name (bytes, KB, MB, GB). * * Note: result must be freed after use. */ char * string_format_size (unsigned long long size) { char *unit_name[] = { N_("bytes"), N_("KB"), N_("MB"), N_("GB") }; char *unit_format[] = { "%.0f", "%.1f", "%.02f", "%.02f" }; float unit_divide[] = { 1, 1024, 1024*1024, 1024*1024*1024 }; char format_size[128], str_size[128]; int num_unit; str_size[0] = '\0'; if (size < 1024*10) num_unit = 0; else if (size < 1024*1024) num_unit = 1; else if (size < 1024*1024*1024) num_unit = 2; else num_unit = 3; snprintf (format_size, sizeof (format_size), "%s %%s", unit_format[num_unit]); snprintf (str_size, sizeof (str_size), format_size, ((float)size) / ((float)(unit_divide[num_unit])), (size <= 1) ? _("byte") : _(unit_name[num_unit])); return strdup (str_size); } /* * Encodes a string in base16 (hexadecimal). * * Argument "length" is number of bytes in "from" to convert (commonly * strlen(from)). */ void string_encode_base16 (const char *from, int length, char *to) { int i; const char *hexa = "0123456789ABCDEF"; char *ptr_to; ptr_to = to; ptr_to[0] = '\0'; for (i = 0; i < length; i++) { ptr_to[0] = hexa[((unsigned char)from[i]) / 16]; ptr_to[1] = hexa[((unsigned char)from[i]) % 16]; ptr_to += 2; } ptr_to[0] = '\0'; } /* * Decodes a base16 string (hexadecimal). * * Returns length of string in "*to" (it does not count final \0). */ int string_decode_base16 (const char *from, char *to) { int length, to_length, i, pos; unsigned char *ptr_to, value; length = strlen (from) / 2; ptr_to = (unsigned char *)to; ptr_to[0] = '\0'; to_length = 0; for (i = 0; i < length; i++) { pos = i * 2; value = 0; /* 4 bits on the left */ if ((from[pos] >= '0') && (from[pos] <= '9')) value |= (from[pos] - '0') << 4; else if ((from[pos] >= 'a') && (from[pos] <= 'f')) value |= (from[pos] - 'a' + 10) << 4; else if ((from[pos] >= 'A') && (from[pos] <= 'F')) value |= (from[pos] - 'A' + 10) << 4; /* 4 bits on the right */ pos++; if ((from[pos] >= '0') && (from[pos] <= '9')) value |= from[pos] - '0'; else if ((from[pos] >= 'a') && (from[pos] <= 'f')) value |= from[pos] - 'a' + 10; else if ((from[pos] >= 'A') && (from[pos] <= 'F')) value |= from[pos] - 'A' + 10; ptr_to[0] = value; ptr_to++; to_length++; } ptr_to[0] = '\0'; return to_length; } /* * Converts 3 bytes of 8 bits in 4 bytes of 6 bits. */ void string_convbase64_8x3_to_6x4 (const char *from, char *to) { unsigned char base64_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "abcdefghijklmnopqrstuvwxyz0123456789+/"; to[0] = base64_table [ (from[0] & 0xfc) >> 2 ]; to[1] = base64_table [ ((from[0] & 0x03) << 4) + ((from[1] & 0xf0) >> 4) ]; to[2] = base64_table [ ((from[1] & 0x0f) << 2) + ((from[2] & 0xc0) >> 6) ]; to[3] = base64_table [ from[2] & 0x3f ]; } /* * Encodes a string in base64. * * Argument "length" is number of bytes in "from" to convert (commonly * strlen(from)). */ void string_encode_base64 (const char *from, int length, char *to) { const char *ptr_from; char *ptr_to; ptr_from = from; ptr_to = to; while (length >= 3) { string_convbase64_8x3_to_6x4 (ptr_from, ptr_to); ptr_from += 3 * sizeof (*ptr_from); ptr_to += 4 * sizeof (*ptr_to); length -= 3; } if (length > 0) { char rest[3] = { 0, 0, 0 }; switch (length) { case 1 : rest[0] = ptr_from[0]; string_convbase64_8x3_to_6x4 (rest, ptr_to); ptr_to[2] = ptr_to[3] = '='; break; case 2 : rest[0] = ptr_from[0]; rest[1] = ptr_from[1]; string_convbase64_8x3_to_6x4 (rest, ptr_to); ptr_to[3] = '='; break; } ptr_to[4] = 0; } else ptr_to[0] = '\0'; } /* * Converts 4 bytes of 6 bits to 3 bytes of 8 bits. */ void string_convbase64_6x4_to_8x3 (const unsigned char *from, unsigned char *to) { to[0] = from[0] << 2 | from[1] >> 4; to[1] = from[1] << 4 | from[2] >> 2; to[2] = ((from[2] << 6) & 0xc0) | from[3]; } /* * Decodes a base64 string. * * Returns length of string in "*to" (it does not count final \0). */ int string_decode_base64 (const char *from, char *to) { const char *ptr_from; int length, to_length, i; char *ptr_to; unsigned char c, in[4], out[3]; unsigned char base64_table[]="|$$$}rstuvwxyz{$$$$$$$>?" "@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq"; ptr_from = from; ptr_to = to; ptr_to[0] = '\0'; to_length = 0; while (ptr_from && ptr_from[0]) { length = 0; for (i = 0; i < 4; i++) { in[i] = 0; } for (i = 0; i < 4; i++) { c = 0; while (ptr_from[0] && (c == 0)) { c = (unsigned char) ptr_from[0]; ptr_from++; c = ((c < 43) || (c > 122)) ? 0 : base64_table[c - 43]; if (c) c = (c == '$') ? 0 : c - 61; } if (ptr_from[0]) { length++; if (c) in[i] = c - 1; } else { in[i] = '\0'; break; } } if (length) { string_convbase64_6x4_to_8x3 (in, out); for (i = 0; i < length - 1; i++) { ptr_to[0] = out[i]; ptr_to++; to_length++; } } } ptr_to[0] = '\0'; return to_length; } /* * Checks if a string is a command. * * Returns: * 1: first char of string is a command char * 0: string is not a command */ int string_is_command_char (const char *string) { const char *ptr_command_chars; if (!string) return 0; if (string[0] == '/') return 1; ptr_command_chars = CONFIG_STRING(config_look_command_chars); if (!ptr_command_chars || !ptr_command_chars[0]) return 0; while (ptr_command_chars && ptr_command_chars[0]) { if (utf8_charcmp (ptr_command_chars, string) == 0) return 1; ptr_command_chars = utf8_next_char (ptr_command_chars); } return 0; } /* * Gets pointer to input text for buffer. * * Returns pointer inside "string" argument or NULL if it's a command (by * default a command starts with a single '/'). */ const char * string_input_for_buffer (const char *string) { char *pos_slash, *pos_space, *next_char; /* special case for C comments pasted in input line */ if (strncmp (string, "/*", 2) == 0) return string; /* * special case if string starts with '/': to allow to paste a path line * "/path/to/file.txt", we check if next '/' is after a space or not */ if (string[0] == '/') { pos_slash = strchr (string + 1, '/'); pos_space = strchr (string + 1, ' '); /* * if there's no other '/' or if '/' is after first space, * then it is a command, and return NULL */ if (!pos_slash || (pos_space && pos_slash > pos_space)) return NULL; return (string[1] == '/') ? string + 1 : string; } /* if string does not start with a command char, then it's not command */ if (!string_is_command_char (string)) return string; next_char = utf8_next_char (string); /* there's no next char, then it's a command */ if (!next_char || !next_char[0]) return NULL; /* check if first char is doubled: if yes, then it's not a command */ if (utf8_charcmp (string, next_char) == 0) return next_char; /* string is a command */ return NULL; } /* * Replaces ${vars} using a callback that returns replacement value (this value * must be newly allocated because it will be freed in this function). * * Nested variables are supported, for example: "${var1:${var2}}". * * Argument "errors" is set with number of keys not found by callback. * * Note: result must be freed after use. */ char * string_replace_with_callback (const char *string, const char *prefix, const char *suffix, char *(*callback)(void *data, const char *text), void *callback_data, int *errors) { int length_prefix, length_suffix, length, length_value, index_string; int index_result, sub_count, sub_level, sub_errors; char *result, *result2, *key, *key2, *value; const char *pos_end_name; *errors = 0; if (!string || !prefix || !prefix[0] || !suffix || !suffix[0]) return NULL; length_prefix = strlen (prefix); length_suffix = strlen (suffix); length = strlen (string) + 1; result = malloc (length); if (result) { index_string = 0; index_result = 0; while (string[index_string]) { if ((string[index_string] == '\\') && (string[index_string + 1] == prefix[0])) { index_string++; result[index_result++] = string[index_string++]; } else if (strncmp (string + index_string, prefix, length_prefix) == 0) { sub_count = 0; sub_level = 0; pos_end_name = string + index_string + length_prefix; while (pos_end_name[0]) { if (strncmp (pos_end_name, suffix, length_suffix) == 0) { if (sub_level == 0) break; sub_level--; } if ((pos_end_name[0] == '\\') && (pos_end_name[1] == prefix[0])) { pos_end_name++; } else if (strncmp (pos_end_name, prefix, length_prefix) == 0) { sub_count++; sub_level++; } pos_end_name++; } /* prefix without matching suffix => error! */ if (!pos_end_name[0]) { result[index_result] = '\0'; (*errors)++; return result; } key = string_strndup (string + index_string + length_prefix, pos_end_name - (string + index_string + length_prefix)); if (key) { if (sub_count > 0) { sub_errors = 0; key2 = string_replace_with_callback (key, prefix, suffix, callback, callback_data, &sub_errors); (*errors) += sub_errors; free (key); key = key2; } value = (*callback) (callback_data, (key) ? key : ""); if (value) { length_value = strlen (value); if (length_value > 0) { length += length_value; result2 = realloc (result, length); if (!result2) { if (result) free (result); if (key) free (key); free (value); return NULL; } result = result2; strcpy (result + index_result, value); index_result += length_value; } index_string = pos_end_name - string + length_suffix; free (value); } else { result[index_result++] = string[index_string++]; (*errors)++; } if (key) free (key); } else result[index_result++] = string[index_string++]; } else result[index_result++] = string[index_string++]; } result[index_result] = '\0'; } return result; } /* * Hashes a shared string. * The string starts after the reference count, which is skipped. * * Returns the hash of the shared string (variant of djb2). */ unsigned long string_shared_hash_key (struct t_hashtable *hashtable, const void *key) { /* make C compiler happy */ (void) hashtable; return hashtable_hash_key_djb2 (((const char *)key) + sizeof (string_shared_count_t)); } /* * Compares two shared strings. * Each string starts after the reference count, which is skipped. * * Returns: * < 0: key1 < key2 * 0: key1 == key2 * > 0: key1 > key2 */ int string_shared_keycmp (struct t_hashtable *hashtable, const void *key1, const void *key2) { /* make C compiler happy */ (void) hashtable; return strcmp (((const char *)key1) + sizeof (string_shared_count_t), ((const char *)key2) + sizeof (string_shared_count_t)); } /* * Frees a shared string. */ void string_shared_free_key (struct t_hashtable *hashtable, void *key, const void *value) { /* make C compiler happy */ (void) hashtable; (void) value; free (key); } /* * Gets a pointer to a shared string. * * A shared string is an entry in the hashtable "string_hashtable_shared", with: * - key: reference count (unsigned integer on 32 bits) + string * - value: NULL pointer (not used) * * The initial reference count is set to 1 and is incremented each time this * function is called for a same string (string content, not the pointer). * * Returns the pointer to the shared string (start of string in key, after the * reference count), NULL if error. * The string returned has exactly same content as string received in argument, * but the pointer to the string is different. * * IMPORTANT: the returned string must NEVER be changed in any way, because it * is used itself as the key of the hashtable. */ const char * string_shared_get (const char *string) { struct t_hashtable_item *ptr_item; char *key; int length; if (!string_hashtable_shared) { /* * use large htable inside hashtable to prevent too many collisions, * which would slow down search of a string in the hashtable */ string_hashtable_shared = hashtable_new (1024, WEECHAT_HASHTABLE_POINTER, WEECHAT_HASHTABLE_POINTER, &string_shared_hash_key, &string_shared_keycmp); if (!string_hashtable_shared) return NULL; string_hashtable_shared->callback_free_key = &string_shared_free_key; } length = sizeof (string_shared_count_t) + strlen (string) + 1; key = malloc (length); if (!key) return NULL; *((string_shared_count_t *)key) = 1; strcpy (key + sizeof (string_shared_count_t), string); ptr_item = hashtable_get_item (string_hashtable_shared, key, NULL); if (ptr_item) { /* * the string already exists in the hashtable, then just increase the * reference count on the string */ (*((string_shared_count_t *)(ptr_item->key)))++; free (key); } else { /* add the shared string in the hashtable */ ptr_item = hashtable_set (string_hashtable_shared, key, NULL); if (!ptr_item) free (key); } return (ptr_item) ? ((const char *)ptr_item->key) + sizeof (string_shared_count_t) : NULL; } /* * Frees a shared string. * * The reference count of the string is decremented. If it becomes 0, then the * shared string is removed from the hashtable (and then the string is really * destroyed). */ void string_shared_free (const char *string) { string_shared_count_t *ptr_count; ptr_count = (string_shared_count_t *)(string - sizeof (string_shared_count_t)); (*ptr_count)--; if (*ptr_count == 0) hashtable_remove (string_hashtable_shared, ptr_count); } /* * Frees all allocated data. */ void string_end () { if (string_hashtable_shared) { hashtable_free (string_hashtable_shared); string_hashtable_shared = NULL; } }