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https://github.com/JGRennison/OpenTTD-patches.git
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115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/* $Id$ */
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#ifndef STRING_H
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#define STRING_H
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#include "macros.h"
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/*
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* dst: destination buffer
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* src: string to copy/concatenate
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* size: size of the destination buffer
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* usage: ttd_strlcpy(dst, src, lengthof(dst));
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*/
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void ttd_strlcat(char *dst, const char *src, size_t size);
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void ttd_strlcpy(char *dst, const char *src, size_t size);
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/*
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* dst: destination buffer
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* src: string to copy
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* last: pointer to the last element in the dst array
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* if NULL no boundary check is performed
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* returns a pointer to the terminating \0 in the destination buffer
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* usage: strecpy(dst, src, lastof(dst));
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*/
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char* strecat(char* dst, const char* src, const char* last);
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char* strecpy(char* dst, const char* src, const char* last);
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char* CDECL str_fmt(const char* str, ...);
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/** Scans the string for valid characters and if it finds invalid ones,
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* replaces them with a question mark '?' */
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void str_validate(char *str);
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/** Scans the string for colour codes and strips them */
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void str_strip_colours(char *str);
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/**
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* Valid filter types for IsValidChar.
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*/
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typedef enum CharSetFilter {
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CS_ALPHANUMERAL, //! Both numeric and alphabetic and spaces and stuff
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CS_NUMERAL, //! Only numeric ones
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CS_ALPHA, //! Only alphabetic values
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} CharSetFilter;
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/** Convert the given string to lowercase, only works with ASCII! */
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void strtolower(char *str);
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/** Get the length of a string, within a limited buffer */
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static inline int ttd_strnlen(const char *str, int maxlen)
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{
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const char *t;
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for (t = str; *t != '\0' && t - str < maxlen; t++);
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return t - str;
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}
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typedef uint32 WChar;
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/**
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* Only allow certain keys. You can define the filter to be used. This makes
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* sure no invalid keys can get into an editbox, like BELL.
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* @param key character to be checked
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* @param afilter the filter to use
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* @return true or false depending if the character is printable/valid or not
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*/
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bool IsValidChar(WChar key, CharSetFilter afilter);
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size_t Utf8Decode(WChar *c, const char *s);
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size_t Utf8Encode(char *buf, WChar c);
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static inline WChar Utf8Consume(const char **s)
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{
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WChar c;
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*s += Utf8Decode(&c, *s);
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return c;
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}
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/** Return the length of a UTF-8 encoded character.
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* @param c Unicode character.
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* @return Length of UTF-8 encoding for character.
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*/
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static inline size_t Utf8CharLen(WChar c)
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{
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if (c < 0x80) return 1;
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if (c < 0x800) return 2;
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if (c < 0x10000) return 3;
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if (c < 0x110000) return 4;
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/* Invalid valid, we encode as a '?' */
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return 1;
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}
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/* Check if the given character is part of a UTF8 sequence */
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static inline bool IsUtf8Part(char c)
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{
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return GB(c, 6, 2) == 2;
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}
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static inline bool IsPrintable(WChar c)
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{
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if (c < 0x20) return false;
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if (c < 0xE000) return true;
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if (c < 0xE200) return false;
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return true;
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}
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#endif /* STRING_H */
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