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	txtbuf.h - ledit - Text editor (WIP)
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	txtbuf.h (2078B)
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	1 #ifndef _TXTBUF_H_
	2 #define _TXTBUF_H_
	3
	4 #include <stddef.h>
	5
	6 /*
	7 * txtbuf is really just a string data type that is badly named.
	8 * The stored text is always nul-terminated.
	9 */
	10
	11 typedef struct {
	12 size_t len, cap;
	13 char *text;
	14 } txtbuf;
	15
	16 /*
	17 * Create an empty txtbuf.
	18 */
	19 txtbuf *txtbuf_new(void);
	20
	21 /*
	22 * Create a new txtbuf, initializing it with the nul-terminated
	23 * string 'str'. The input string is copied.
	24 */
	25 txtbuf txtbuf_new_from_char(char str);
	26
	27 /*
	28 * Create a new txtbuf, initializing it with the string 'str'
	29 * of length 'len'. The input string is copied.
	30 */
	31 txtbuf txtbuf_new_from_char_len(char str, size_t len);
	32
	33 /*
	34 * Replace the stored text in 'buf' with the text generated by
	35 * 'snprintf' when called with the given format string and args.
	36 */
	37 void txtbuf_fmt(txtbuf buf, char fmt, ...);
	38
	39 /*
	40 * Replace the stored text in 'buf' with 'text'.
	41 */
	42 void txtbuf_set_text(txtbuf buf, char text);
	43
	44 /*
	45 * Same as txtbuf_set_text, but with explicit length for 'text'.
	46 */
	47 void txtbuf_set_textn(txtbuf buf, char text, size_t len);
	48
	49 /*
	50 * Append 'text' to the text stored in 'buf'.
	51 */
	52 void txtbuf_append(txtbuf buf, char text);
	53
	54 /*
	55 * Same as txtbuf_append, but with explicit length for 'text'.
	56 */
	57 void txtbuf_appendn(txtbuf buf, char text, size_t len);
	58
	59 /*
	60 * Compare the text of two txtbuf's like 'strcmp'.
	61 */
	62 int txtbuf_cmp(txtbuf buf1, txtbuf buf2);
	63
	64 /*
	65 * Convenience function for calling 'txtbuf_cmp' and checking if the
	66 * return value is 0, i.e. the strings are equal.
	67 */
	68 int txtbuf_eql(txtbuf buf1, txtbuf buf2);
	69
	70 /*
	71 * Make sure the txtbuf has space for at least the given size,
	72 * plus '\0' at the end.
	73 */
	74 void txtbuf_resize(txtbuf *buf, size_t sz);
	75
	76 /*
	77 * Destroy a txtbuf.
	78 */
	79 void txtbuf_destroy(txtbuf *buf);
	80
	81 /*
	82 * Copy txtbuf 'src' to txtbuf 'dst'.
	83 */
	84 void txtbuf_copy(txtbuf dst, txtbuf src);
	85
	86 /*
	87 * Duplicate txtbuf 'src'.
	88 */
	89 txtbuf txtbuf_dup(txtbuf src);
	90
	91 /*
	92 * Clear the text, but do not reduce the internal capacity
	93 * (for efficiency if it will be filled up again anyways).
	94 */
	95 void txtbuf_clear(txtbuf *buf);
	96
	97 #endif