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authorcashmere <cashmere@autistici.org>2026-09-04 09:05:24 +0200
committercashmere <cashmere@autistici.org>2026-09-04 09:05:24 +0200
commit4f49b16079b27d7ce633619e4cddfdf2bffbc952 (patch)
treec296c1e7f3c3e2f6859c6d3a1b1b208779b89679 /extsrc/linenoise.c
downloadrelic-master.tar.gz
initial commitHEADmaster
Diffstat (limited to 'extsrc/linenoise.c')
-rw-r--r--extsrc/linenoise.c2812
1 files changed, 2812 insertions, 0 deletions
diff --git a/extsrc/linenoise.c b/extsrc/linenoise.c
new file mode 100644
index 0000000..0541382
--- /dev/null
+++ b/extsrc/linenoise.c
@@ -0,0 +1,2812 @@
+#line 1 "utf8.h"
+#ifndef UTF8_UTIL_H
+#define UTF8_UTIL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * UTF-8 utility functions
+ *
+ * (c) 2010-2019 Steve Bennett <steveb@workware.net.au>
+ *
+ * See utf8.c for licence details.
+ */
+
+#ifndef USE_UTF8
+#include <ctype.h>
+
+#define MAX_UTF8_LEN 1
+
+/* No utf-8 support. 1 byte = 1 char */
+#define utf8_strlen(S, B) ((B) < 0 ? (int)strlen(S) : (B))
+#define utf8_strwidth(S, B) utf8_strlen((S), (B))
+#define utf8_tounicode(S, CP) (*(CP) = (unsigned char)*(S), 1)
+#define utf8_index(C, I) (I)
+#define utf8_charlen(C) 1
+ #define utf8_width(C) 1
+
+#else
+
+#define MAX_UTF8_LEN 4
+
+/**
+ * Converts the given unicode codepoint (0 - 0x1fffff) to utf-8
+ * and stores the result at 'p'.
+ *
+ * Returns the number of utf-8 characters
+ */
+int utf8_fromunicode(char *p, unsigned uc);
+
+/**
+ * Returns the length of the utf-8 sequence starting with 'c'.
+ *
+ * Returns 1-4, or -1 if this is not a valid start byte.
+ *
+ * Note that charlen=4 is not supported by the rest of the API.
+ */
+int utf8_charlen(int c);
+
+/**
+ * Returns the number of characters in the utf-8
+ * string of the given byte length.
+ *
+ * Any bytes which are not part of an valid utf-8
+ * sequence are treated as individual characters.
+ *
+ * The string *must* be null terminated.
+ *
+ * Does not support unicode code points > \u1fffff
+ */
+int utf8_strlen(const char *str, int bytelen);
+
+/**
+ * Calculates the display width of the first 'charlen' characters in 'str'.
+ * See utf8_width()
+ */
+int utf8_strwidth(const char *str, int charlen);
+
+/**
+ * Returns the byte index of the given character in the utf-8 string.
+ *
+ * The string *must* be null terminated.
+ *
+ * This will return the byte length of a utf-8 string
+ * if given the char length.
+ */
+int utf8_index(const char *str, int charindex);
+
+/**
+ * Returns the unicode codepoint corresponding to the
+ * utf-8 sequence 'str'.
+ *
+ * Stores the result in *uc and returns the number of bytes
+ * consumed.
+ *
+ * If 'str' is null terminated, then an invalid utf-8 sequence
+ * at the end of the string will be returned as individual bytes.
+ *
+ * If it is not null terminated, the length *must* be checked first.
+ *
+ * Does not support unicode code points > \u1fffff
+ */
+int utf8_tounicode(const char *str, int *uc);
+
+/**
+ * Returns the width (in characters) of the given unicode codepoint.
+ * This is 1 for normal letters and 0 for combining characters and 2 for wide characters.
+ */
+int utf8_width(int ch);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+#line 1 "utf8.c"
+/**
+ * UTF-8 utility functions
+ *
+ * (c) 2010-2019 Steve Bennett <steveb@workware.net.au>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#ifndef UTF8_UTIL_H
+#include "utf8.h"
+#endif
+
+#ifdef USE_UTF8
+int utf8_fromunicode(char *p, unsigned uc)
+{
+ if (uc <= 0x7f) {
+ *p = uc;
+ return 1;
+ }
+ else if (uc <= 0x7ff) {
+ *p++ = 0xc0 | ((uc & 0x7c0) >> 6);
+ *p = 0x80 | (uc & 0x3f);
+ return 2;
+ }
+ else if (uc <= 0xffff) {
+ *p++ = 0xe0 | ((uc & 0xf000) >> 12);
+ *p++ = 0x80 | ((uc & 0xfc0) >> 6);
+ *p = 0x80 | (uc & 0x3f);
+ return 3;
+ }
+ /* Note: We silently truncate to 21 bits here: 0x1fffff */
+ else {
+ *p++ = 0xf0 | ((uc & 0x1c0000) >> 18);
+ *p++ = 0x80 | ((uc & 0x3f000) >> 12);
+ *p++ = 0x80 | ((uc & 0xfc0) >> 6);
+ *p = 0x80 | (uc & 0x3f);
+ return 4;
+ }
+}
+
+int utf8_charlen(int c)
+{
+ if ((c & 0x80) == 0) {
+ return 1;
+ }
+ if ((c & 0xe0) == 0xc0) {
+ return 2;
+ }
+ if ((c & 0xf0) == 0xe0) {
+ return 3;
+ }
+ if ((c & 0xf8) == 0xf0) {
+ return 4;
+ }
+ /* Invalid sequence */
+ return -1;
+}
+
+int utf8_strlen(const char *str, int bytelen)
+{
+ int charlen = 0;
+ if (bytelen < 0) {
+ bytelen = strlen(str);
+ }
+ while (bytelen > 0) {
+ int c;
+ int l = utf8_tounicode(str, &c);
+ charlen++;
+ str += l;
+ bytelen -= l;
+ }
+ return charlen;
+}
+
+int utf8_strwidth(const char *str, int charlen)
+{
+ int width = 0;
+ while (charlen) {
+ int c;
+ int l = utf8_tounicode(str, &c);
+ width += utf8_width(c);
+ str += l;
+ charlen--;
+ }
+ return width;
+}
+
+int utf8_index(const char *str, int index)
+{
+ const char *s = str;
+ while (index--) {
+ int c;
+ s += utf8_tounicode(s, &c);
+ }
+ return s - str;
+}
+
+int utf8_tounicode(const char *str, int *uc)
+{
+ unsigned const char *s = (unsigned const char *)str;
+
+ if (s[0] < 0xc0) {
+ *uc = s[0];
+ return 1;
+ }
+ if (s[0] < 0xe0) {
+ if ((s[1] & 0xc0) == 0x80) {
+ *uc = ((s[0] & ~0xc0) << 6) | (s[1] & ~0x80);
+ if (*uc >= 0x80) {
+ return 2;
+ }
+ /* Otherwise this is an invalid sequence */
+ }
+ }
+ else if (s[0] < 0xf0) {
+ if (((str[1] & 0xc0) == 0x80) && ((str[2] & 0xc0) == 0x80)) {
+ *uc = ((s[0] & ~0xe0) << 12) | ((s[1] & ~0x80) << 6) | (s[2] & ~0x80);
+ if (*uc >= 0x800) {
+ return 3;
+ }
+ /* Otherwise this is an invalid sequence */
+ }
+ }
+ else if (s[0] < 0xf8) {
+ if (((str[1] & 0xc0) == 0x80) && ((str[2] & 0xc0) == 0x80) && ((str[3] & 0xc0) == 0x80)) {
+ *uc = ((s[0] & ~0xf0) << 18) | ((s[1] & ~0x80) << 12) | ((s[2] & ~0x80) << 6) | (s[3] & ~0x80);
+ if (*uc >= 0x10000) {
+ return 4;
+ }
+ /* Otherwise this is an invalid sequence */
+ }
+ }
+
+ /* Invalid sequence, so just return the byte */
+ *uc = *s;
+ return 1;
+}
+
+struct utf8range {
+ int lower; /* lower inclusive */
+ int upper; /* upper exclusive */
+};
+
+/* From http://unicode.org/Public/UNIDATA/UnicodeData.txt */
+static const struct utf8range unicode_range_combining[] = {
+ { 0x0300, 0x0370 }, { 0x0483, 0x048a }, { 0x0591, 0x05d0 }, { 0x0610, 0x061b },
+ { 0x064b, 0x0660 }, { 0x0670, 0x0671 }, { 0x06d6, 0x06dd }, { 0x06df, 0x06e5 },
+ { 0x06e7, 0x06ee }, { 0x0711, 0x0712 }, { 0x0730, 0x074d }, { 0x07a6, 0x07b1 },
+ { 0x07eb, 0x07f4 }, { 0x0816, 0x0830 }, { 0x0859, 0x085e }, { 0x08d4, 0x0904 },
+ { 0x093a, 0x0958 }, { 0x0962, 0x0964 }, { 0x0981, 0x0985 }, { 0x09bc, 0x09ce },
+ { 0x09d7, 0x09dc }, { 0x09e2, 0x09e6 }, { 0x0a01, 0x0a05 }, { 0x0a3c, 0x0a59 },
+ { 0x0a70, 0x0a72 }, { 0x0a75, 0x0a85 }, { 0x0abc, 0x0ad0 }, { 0x0ae2, 0x0ae6 },
+ { 0x0afa, 0x0b05 }, { 0x0b3c, 0x0b5c }, { 0x0b62, 0x0b66 }, { 0x0b82, 0x0b83 },
+ { 0x0bbe, 0x0bd0 }, { 0x0bd7, 0x0be6 }, { 0x0c00, 0x0c05 }, { 0x0c3e, 0x0c58 },
+ { 0x0c62, 0x0c66 }, { 0x0c81, 0x0c85 }, { 0x0cbc, 0x0cde }, { 0x0ce2, 0x0ce6 },
+ { 0x0d00, 0x0d05 }, { 0x0d3b, 0x0d4e }, { 0x0d57, 0x0d58 }, { 0x0d62, 0x0d66 },
+ { 0x0d82, 0x0d85 }, { 0x0dca, 0x0de6 }, { 0x0df2, 0x0df4 }, { 0x0e31, 0x0e32 },
+ { 0x0e34, 0x0e3f }, { 0x0e47, 0x0e4f }, { 0x0eb1, 0x0eb2 }, { 0x0eb4, 0x0ebd },
+ { 0x0ec8, 0x0ed0 }, { 0x0f18, 0x0f1a }, { 0x0f35, 0x0f3a }, { 0x0f3e, 0x0f40 },
+ { 0x0f71, 0x0f88 }, { 0x0f8d, 0x0fbe }, { 0x0fc6, 0x0fc7 }, { 0x102b, 0x103f },
+ { 0x1056, 0x105a }, { 0x105e, 0x1065 }, { 0x1067, 0x106e }, { 0x1071, 0x1075 },
+ { 0x1082, 0x1090 }, { 0x109a, 0x109e }, { 0x135d, 0x1360 }, { 0x1712, 0x1720 },
+ { 0x1732, 0x1735 }, { 0x1752, 0x1760 }, { 0x1772, 0x1780 }, { 0x17b4, 0x17d4 },
+ { 0x17dd, 0x17e0 }, { 0x180b, 0x180e }, { 0x1885, 0x1887 }, { 0x18a9, 0x18aa },
+ { 0x1920, 0x1940 }, { 0x1a17, 0x1a1e }, { 0x1a55, 0x1a80 }, { 0x1ab0, 0x1b05 },
+ { 0x1b34, 0x1b45 }, { 0x1b6b, 0x1b74 }, { 0x1b80, 0x1b83 }, { 0x1ba1, 0x1bae },
+ { 0x1be6, 0x1bfc }, { 0x1c24, 0x1c3b }, { 0x1cd0, 0x1ce9 }, { 0x1ced, 0x1cee },
+ { 0x1cf2, 0x1cf5 }, { 0x1cf7, 0x1d00 }, { 0x1dc0, 0x1e00 }, { 0x20d0, 0x2100 },
+ { 0x2cef, 0x2cf2 }, { 0x2d7f, 0x2d80 }, { 0x2de0, 0x2e00 }, { 0x302a, 0x3030 },
+ { 0x3099, 0x309b }, { 0xa66f, 0xa67e }, { 0xa69e, 0xa6a0 }, { 0xa6f0, 0xa6f2 },
+ { 0xa802, 0xa803 }, { 0xa806, 0xa807 }, { 0xa80b, 0xa80c }, { 0xa823, 0xa828 },
+ { 0xa880, 0xa882 }, { 0xa8b4, 0xa8ce }, { 0xa8e0, 0xa8f2 }, { 0xa926, 0xa92e },
+ { 0xa947, 0xa95f }, { 0xa980, 0xa984 }, { 0xa9b3, 0xa9c1 }, { 0xa9e5, 0xa9e6 },
+ { 0xaa29, 0xaa40 }, { 0xaa43, 0xaa44 }, { 0xaa4c, 0xaa50 }, { 0xaa7b, 0xaa7e },
+ { 0xaab0, 0xaab5 }, { 0xaab7, 0xaab9 }, { 0xaabe, 0xaac2 }, { 0xaaeb, 0xaaf0 },
+ { 0xaaf5, 0xab01 }, { 0xabe3, 0xabf0 }, { 0xfb1e, 0xfb1f }, { 0xfe00, 0xfe10 },
+ { 0xfe20, 0xfe30 },
+};
+
+/* From http://unicode.org/Public/UNIDATA/EastAsianWidth.txt */
+static const struct utf8range unicode_range_wide[] = {
+ { 0x1100, 0x115f }, { 0x231a, 0x231b }, { 0x2329, 0x232a }, { 0x23e9, 0x23ec },
+ { 0x23f0, 0x23f0 }, { 0x23f3, 0x23f3 }, { 0x25fd, 0x25fe }, { 0x2614, 0x2615 },
+ { 0x2648, 0x2653 }, { 0x267f, 0x267f }, { 0x2693, 0x2693 }, { 0x26a1, 0x26a1 },
+ { 0x26aa, 0x26ab }, { 0x26bd, 0x26be }, { 0x26c4, 0x26c5 }, { 0x26ce, 0x26ce },
+ { 0x26d4, 0x26d4 }, { 0x26ea, 0x26ea }, { 0x26f2, 0x26f3 }, { 0x26f5, 0x26f5 },
+ { 0x26fa, 0x26fa }, { 0x26fd, 0x26fd }, { 0x2705, 0x2705 }, { 0x270a, 0x270b },
+ { 0x2728, 0x2728 }, { 0x274c, 0x274c }, { 0x274e, 0x274e }, { 0x2753, 0x2755 },
+ { 0x2757, 0x2757 }, { 0x2795, 0x2797 }, { 0x27b0, 0x27b0 }, { 0x27bf, 0x27bf },
+ { 0x2b1b, 0x2b1c }, { 0x2b50, 0x2b50 }, { 0x2b55, 0x2b55 }, { 0x2e80, 0x2e99 },
+ { 0x2e9b, 0x2ef3 }, { 0x2f00, 0x2fd5 }, { 0x2ff0, 0x2ffb }, { 0x3001, 0x303e },
+ { 0x3041, 0x3096 }, { 0x3099, 0x30ff }, { 0x3105, 0x312e }, { 0x3131, 0x318e },
+ { 0x3190, 0x31ba }, { 0x31c0, 0x31e3 }, { 0x31f0, 0x321e }, { 0x3220, 0x3247 },
+ { 0x3250, 0x32fe }, { 0x3300, 0x4dbf }, { 0x4e00, 0xa48c }, { 0xa490, 0xa4c6 },
+ { 0xa960, 0xa97c }, { 0xac00, 0xd7a3 }, { 0xf900, 0xfaff }, { 0xfe10, 0xfe19 },
+ { 0xfe30, 0xfe52 }, { 0xfe54, 0xfe66 }, { 0xfe68, 0xfe6b }, { 0x16fe0, 0x16fe1 },
+ { 0x17000, 0x187ec }, { 0x18800, 0x18af2 }, { 0x1b000, 0x1b11e }, { 0x1b170, 0x1b2fb },
+ { 0x1f004, 0x1f004 }, { 0x1f0cf, 0x1f0cf }, { 0x1f18e, 0x1f18e }, { 0x1f191, 0x1f19a },
+ { 0x1f200, 0x1f202 }, { 0x1f210, 0x1f23b }, { 0x1f240, 0x1f248 }, { 0x1f250, 0x1f251 },
+ { 0x1f260, 0x1f265 }, { 0x1f300, 0x1f320 }, { 0x1f32d, 0x1f335 }, { 0x1f337, 0x1f37c },
+ { 0x1f37e, 0x1f393 }, { 0x1f3a0, 0x1f3ca }, { 0x1f3cf, 0x1f3d3 }, { 0x1f3e0, 0x1f3f0 },
+ { 0x1f3f4, 0x1f3f4 }, { 0x1f3f8, 0x1f43e }, { 0x1f440, 0x1f440 }, { 0x1f442, 0x1f4fc },
+ { 0x1f4ff, 0x1f53d }, { 0x1f54b, 0x1f54e }, { 0x1f550, 0x1f567 }, { 0x1f57a, 0x1f57a },
+ { 0x1f595, 0x1f596 }, { 0x1f5a4, 0x1f5a4 }, { 0x1f5fb, 0x1f64f }, { 0x1f680, 0x1f6c5 },
+ { 0x1f6cc, 0x1f6cc }, { 0x1f6d0, 0x1f6d2 }, { 0x1f6eb, 0x1f6ec }, { 0x1f6f4, 0x1f6f8 },
+ { 0x1f910, 0x1f93e }, { 0x1f940, 0x1f94c }, { 0x1f950, 0x1f96b }, { 0x1f980, 0x1f997 },
+ { 0x1f9c0, 0x1f9c0 }, { 0x1f9d0, 0x1f9e6 }, { 0x20000, 0x2fffd }, { 0x30000, 0x3fffd },
+};
+
+#define ARRAYSIZE(A) sizeof(A) / sizeof(*(A))
+
+static int cmp_range(const void *key, const void *cm)
+{
+ const struct utf8range *range = (const struct utf8range *)cm;
+ int ch = *(int *)key;
+ if (ch < range->lower) {
+ return -1;
+ }
+ if (ch >= range->upper) {
+ return 1;
+ }
+ return 0;
+}
+
+static int utf8_in_range(const struct utf8range *range, int num, int ch)
+{
+ const struct utf8range *r =
+ bsearch(&ch, range, num, sizeof(*range), cmp_range);
+
+ if (r) {
+ return 1;
+ }
+ return 0;
+}
+
+int utf8_width(int ch)
+{
+ /* short circuit for common case */
+ if (isascii(ch)) {
+ return 1;
+ }
+ if (utf8_in_range(unicode_range_combining, ARRAYSIZE(unicode_range_combining), ch)) {
+ return 0;
+ }
+ if (utf8_in_range(unicode_range_wide, ARRAYSIZE(unicode_range_wide), ch)) {
+ return 2;
+ }
+ return 1;
+}
+#endif
+#line 1 "stringbuf.h"
+#ifndef STRINGBUF_H
+#define STRINGBUF_H
+/**
+ * resizable string buffer
+ *
+ * (c) 2017-2020 Steve Bennett <steveb@workware.net.au>
+ *
+ * See utf8.c for licence details.
+ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file
+ * A stringbuf is a resizing, null terminated string buffer.
+ *
+ * The buffer is reallocated as necessary.
+ *
+ * In general it is *not* OK to call these functions with a NULL pointer
+ * unless stated otherwise.
+ *
+ * If USE_UTF8 is defined, supports utf8.
+ */
+
+/**
+ * The stringbuf structure should not be accessed directly.
+ * Use the functions below.
+ */
+typedef struct {
+ int remaining; /**< Allocated, but unused space */
+ int last; /**< Index of the null terminator (and thus the length of the string) */
+#ifdef USE_UTF8
+ int chars; /**< Count of characters */
+#endif
+ char *data; /**< Allocated memory containing the string or NULL for empty */
+} stringbuf;
+
+/**
+ * Allocates and returns a new stringbuf with no elements.
+ */
+stringbuf *sb_alloc(void);
+
+/**
+ * Frees a stringbuf.
+ * It is OK to call this with NULL.
+ */
+void sb_free(stringbuf *sb);
+
+/**
+ * Returns an allocated copy of the stringbuf
+ */
+stringbuf *sb_copy(stringbuf *sb);
+
+/**
+ * Returns the byte length of the buffer.
+ *
+ * Returns 0 for both a NULL buffer and an empty buffer.
+ */
+static inline int sb_len(stringbuf *sb) {
+ return sb->last;
+}
+
+/**
+ * Returns the utf8 character length of the buffer.
+ *
+ * Returns 0 for both a NULL buffer and an empty buffer.
+ */
+static inline int sb_chars(stringbuf *sb) {
+#ifdef USE_UTF8
+ return sb->chars;
+#else
+ return sb->last;
+#endif
+}
+
+/**
+ * Appends a null terminated string to the stringbuf
+ */
+void sb_append(stringbuf *sb, const char *str);
+
+/**
+ * Like sb_append() except does not require a null terminated string.
+ * The length of 'str' is given as 'len'
+ *
+ * Note that in utf8 mode, characters will *not* be counted correctly
+ * if a partial utf8 sequence is added with sb_append_len()
+ */
+void sb_append_len(stringbuf *sb, const char *str, int len);
+
+/**
+ * Returns a pointer to the null terminated string in the buffer.
+ *
+ * Note this pointer only remains valid until the next modification to the
+ * string buffer.
+ *
+ * The returned pointer can be used to update the buffer in-place
+ * as long as care is taken to not overwrite the end of the buffer.
+ */
+static inline char *sb_str(const stringbuf *sb)
+{
+ return sb->data;
+}
+
+/**
+ * Inserts the given string *before* (zero-based) byte 'index' in the stringbuf.
+ * If index is past the end of the buffer, the string is appended,
+ * just like sb_append()
+ */
+void sb_insert(stringbuf *sb, int index, const char *str);
+
+/**
+ * Delete 'len' bytes in the string at the given index.
+ *
+ * Any bytes past the end of the buffer are ignored.
+ * The buffer remains null terminated.
+ *
+ * If len is -1, deletes to the end of the buffer.
+ */
+void sb_delete(stringbuf *sb, int index, int len);
+
+/**
+ * Clear to an empty buffer.
+ */
+void sb_clear(stringbuf *sb);
+
+/**
+ * Return an allocated copy of buffer and frees 'sb'.
+ *
+ * If 'sb' is empty, returns an allocated copy of "".
+ */
+char *sb_to_string(stringbuf *sb);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+#line 1 "stringbuf.c"
+/**
+ * resizable string buffer
+ *
+ * (c) 2017-2020 Steve Bennett <steveb@workware.net.au>
+ *
+ * See utf8.c for licence details.
+ */
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <assert.h>
+
+#ifndef STRINGBUF_H
+#include "stringbuf.h"
+#endif
+#ifdef USE_UTF8
+#ifndef UTF8_UTIL_H
+#include "utf8.h"
+#endif
+#endif
+
+#define SB_INCREMENT 200
+
+stringbuf *sb_alloc(void)
+{
+ stringbuf *sb = (stringbuf *)malloc(sizeof(*sb));
+ sb->remaining = 0;
+ sb->last = 0;
+#ifdef USE_UTF8
+ sb->chars = 0;
+#endif
+ sb->data = NULL;
+
+ return(sb);
+}
+
+void sb_free(stringbuf *sb)
+{
+ if (sb) {
+ free(sb->data);
+ }
+ free(sb);
+}
+
+static void sb_realloc(stringbuf *sb, int newlen)
+{
+ sb->data = (char *)realloc(sb->data, newlen);
+ sb->remaining = newlen - sb->last;
+}
+
+void sb_append(stringbuf *sb, const char *str)
+{
+ sb_append_len(sb, str, strlen(str));
+}
+
+void sb_append_len(stringbuf *sb, const char *str, int len)
+{
+ if (sb->remaining < len + 1) {
+ sb_realloc(sb, sb->last + len + 1 + SB_INCREMENT);
+ }
+ memcpy(sb->data + sb->last, str, len);
+ sb->data[sb->last + len] = 0;
+
+ sb->last += len;
+ sb->remaining -= len;
+#ifdef USE_UTF8
+ sb->chars += utf8_strlen(str, len);
+#endif
+}
+
+char *sb_to_string(stringbuf *sb)
+{
+ if (sb->data == NULL) {
+ /* Return an allocated empty string, not null */
+ return strdup("");
+ }
+ else {
+ /* Just return the data and free the stringbuf structure */
+ char *pt = sb->data;
+ free(sb);
+ return pt;
+ }
+}
+
+/* Insert and delete operations */
+
+/* Moves up all the data at position 'pos' and beyond by 'len' bytes
+ * to make room for new data
+ *
+ * Note: Does *not* update sb->chars
+ */
+static void sb_insert_space(stringbuf *sb, int pos, int len)
+{
+ assert(pos <= sb->last);
+
+ /* Make sure there is enough space */
+ if (sb->remaining < len) {
+ sb_realloc(sb, sb->last + len + SB_INCREMENT);
+ }
+ /* Now move it up */
+ memmove(sb->data + pos + len, sb->data + pos, sb->last - pos);
+ sb->last += len;
+ sb->remaining -= len;
+ /* And null terminate */
+ sb->data[sb->last] = 0;
+}
+
+/**
+ * Move down all the data from pos + len, effectively
+ * deleting the data at position 'pos' of length 'len'
+ */
+static void sb_delete_space(stringbuf *sb, int pos, int len)
+{
+ assert(pos < sb->last);
+ assert(pos + len <= sb->last);
+
+#ifdef USE_UTF8
+ sb->chars -= utf8_strlen(sb->data + pos, len);
+#endif
+
+ /* Now move it up */
+ memmove(sb->data + pos, sb->data + pos + len, sb->last - pos - len);
+ sb->last -= len;
+ sb->remaining += len;
+ /* And null terminate */
+ sb->data[sb->last] = 0;
+}
+
+void sb_insert(stringbuf *sb, int index, const char *str)
+{
+ if (index >= sb->last) {
+ /* Inserting after the end of the list appends. */
+ sb_append(sb, str);
+ }
+ else {
+ int len = strlen(str);
+
+ sb_insert_space(sb, index, len);
+ memcpy(sb->data + index, str, len);
+#ifdef USE_UTF8
+ sb->chars += utf8_strlen(str, len);
+#endif
+ }
+}
+
+/**
+ * Delete the bytes at index 'index' for length 'len'
+ * Has no effect if the index is past the end of the list.
+ */
+void sb_delete(stringbuf *sb, int index, int len)
+{
+ if (index < sb->last) {
+ char *pos = sb->data + index;
+ if (len < 0) {
+ len = sb->last;
+ }
+
+ sb_delete_space(sb, pos - sb->data, len);
+ }
+}
+
+void sb_clear(stringbuf *sb)
+{
+ if (sb->data) {
+ /* Null terminate */
+ sb->data[0] = 0;
+ sb->last = 0;
+#ifdef USE_UTF8
+ sb->chars = 0;
+#endif
+ }
+}
+#line 1 "linenoise.c"
+/* linenoise.c -- guerrilla line editing library against the idea that a
+ * line editing lib needs to be 20,000 lines of C code.
+ *
+ * You can find the latest source code at:
+ *
+ * http://github.com/msteveb/linenoise
+ * (forked from http://github.com/antirez/linenoise)
+ *
+ * Does a number of crazy assumptions that happen to be true in 99.9999% of
+ * the 2010 UNIX computers around.
+ *
+ * ------------------------------------------------------------------------
+ *
+ * Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ * Copyright (c) 2011, Steve Bennett <steveb at workware dot net dot au>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ------------------------------------------------------------------------
+ *
+ * References:
+ * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+ * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
+ *
+ * Bloat:
+ * - Completion?
+ *
+ * Unix/termios
+ * ------------
+ * List of escape sequences used by this program, we do everything just
+ * a few sequences. In order to be so cheap we may have some
+ * flickering effect with some slow terminal, but the lesser sequences
+ * the more compatible.
+ *
+ * EL (Erase Line)
+ * Sequence: ESC [ 0 K
+ * Effect: clear from cursor to end of line
+ *
+ * CUF (CUrsor Forward)
+ * Sequence: ESC [ n C
+ * Effect: moves cursor forward n chars
+ *
+ * CR (Carriage Return)
+ * Sequence: \r
+ * Effect: moves cursor to column 1
+ *
+ * The following are used to clear the screen: ESC [ H ESC [ 2 J
+ * This is actually composed of two sequences:
+ *
+ * cursorhome
+ * Sequence: ESC [ H
+ * Effect: moves the cursor to upper left corner
+ *
+ * ED2 (Clear entire screen)
+ * Sequence: ESC [ 2 J
+ * Effect: clear the whole screen
+ *
+ * == For highlighting control characters, we also use the following two ==
+ * SO (enter StandOut)
+ * Sequence: ESC [ 7 m
+ * Effect: Uses some standout mode such as reverse video
+ *
+ * SE (Standout End)
+ * Sequence: ESC [ 0 m
+ * Effect: Exit standout mode
+ *
+ * == Only used if TIOCGWINSZ fails ==
+ * DSR/CPR (Report cursor position)
+ * Sequence: ESC [ 6 n
+ * Effect: reports current cursor position as ESC [ NNN ; MMM R
+ *
+ * == Only used in multiline mode ==
+ * CUU (Cursor Up)
+ * Sequence: ESC [ n A
+ * Effect: moves cursor up n chars.
+ *
+ * CUD (Cursor Down)
+ * Sequence: ESC [ n B
+ * Effect: moves cursor down n chars.
+ *
+ * win32/console
+ * -------------
+ * If __MINGW32__ is defined, the win32 console API is used.
+ * This could probably be made to work for the msvc compiler too.
+ * This support based in part on work by Jon Griffiths.
+ */
+
+#ifdef _WIN32 /* Windows platform, either MinGW or Visual Studio (MSVC) */
+#include <windows.h>
+#include <fcntl.h>
+#define USE_WINCONSOLE
+#ifdef __MINGW32__
+#define HAVE_UNISTD_H
+#endif
+#else
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <poll.h>
+#define USE_TERMIOS
+#define HAVE_UNISTD_H
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#if defined(_WIN32) && !defined(__MINGW32__)
+/* Microsoft headers don't like old POSIX names */
+#define strdup _strdup
+#define snprintf _snprintf
+#endif
+
+#include "linenoise.h"
+#ifndef STRINGBUF_H
+#include "stringbuf.h"
+#endif
+#ifndef UTF8_UTIL_H
+#include "utf8.h"
+#endif
+
+#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
+
+/* ctrl('A') -> 0x01 */
+#define ctrl(C) ((C) - '@')
+/* meta('a') -> 0xe1 */
+#define meta(C) ((C) | 0x80)
+
+/* Use -ve numbers here to co-exist with normal unicode chars */
+enum {
+ SPECIAL_NONE,
+ /* don't use -1 here since that indicates error */
+ SPECIAL_UP = -20,
+ SPECIAL_DOWN = -21,
+ SPECIAL_LEFT = -22,
+ SPECIAL_RIGHT = -23,
+ SPECIAL_DELETE = -24,
+ SPECIAL_HOME = -25,
+ SPECIAL_END = -26,
+ SPECIAL_INSERT = -27,
+ SPECIAL_PAGE_UP = -28,
+ SPECIAL_PAGE_DOWN = -29,
+
+ /* Some handy names for other special keycodes */
+ CHAR_ESCAPE = 27,
+ CHAR_DELETE = 127,
+};
+
+static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
+static int history_len = 0;
+static int history_index = 0;
+static char **history = NULL;
+
+/* Structure to contain the status of the current (being edited) line */
+struct current {
+ stringbuf *buf; /* Current buffer. Always null terminated */
+ int pos; /* Cursor position, measured in chars */
+ int cols; /* Size of the window, in chars */
+ int nrows; /* How many rows are being used in multiline mode (>= 1) */
+ int rpos; /* The current row containing the cursor - multiline mode only */
+ int colsright; /* refreshLine() cached cols for insert_char() optimisation */
+ int colsleft; /* refreshLine() cached cols for remove_char() optimisation */
+ const char *prompt;
+ stringbuf *capture; /* capture buffer, or NULL for none. Always null terminated */
+ stringbuf *output; /* used only during refreshLine() - output accumulator */
+#if defined(USE_TERMIOS)
+ int fd; /* Terminal fd */
+ int pending; /* pending char fd_read_char() */
+#elif defined(USE_WINCONSOLE)
+ HANDLE outh; /* Console output handle */
+ HANDLE inh; /* Console input handle */
+ int rows; /* Screen rows */
+ int x; /* Current column during output */
+ int y; /* Current row */
+#ifdef USE_UTF8
+ #define UBUF_MAX_CHARS 132
+ WORD ubuf[UBUF_MAX_CHARS + 1]; /* Accumulates utf16 output - one extra for final surrogate pairs */
+ int ubuflen; /* length used in ubuf */
+ int ubufcols; /* how many columns are represented by the chars in ubuf? */
+#endif
+#endif
+};
+
+static int fd_read(struct current *current);
+static int getWindowSize(struct current *current);
+static void cursorDown(struct current *current, int n);
+static void cursorUp(struct current *current, int n);
+static void eraseEol(struct current *current);
+static void refreshLine(struct current *current);
+static void refreshLineAlt(struct current *current, const char *prompt, const char *buf, int cursor_pos);
+static void setCursorPos(struct current *current, int x);
+static void setOutputHighlight(struct current *current, const int *props, int nprops);
+static void set_current(struct current *current, const char *str);
+
+static int fd_isatty(struct current *current)
+{
+#ifdef USE_TERMIOS
+ return isatty(current->fd);
+#else
+ (void)current;
+ return 0;
+#endif
+}
+
+void linenoiseHistoryFree(void) {
+ if (history) {
+ int j;
+
+ for (j = 0; j < history_len; j++)
+ free(history[j]);
+ free(history);
+ history = NULL;
+ history_len = 0;
+ }
+}
+
+typedef enum {
+ EP_START, /* looking for ESC */
+ EP_ESC, /* looking for [ */
+ EP_DIGITS, /* parsing digits */
+ EP_PROPS, /* parsing digits or semicolons */
+ EP_END, /* ok */
+ EP_ERROR, /* error */
+} ep_state_t;
+
+struct esc_parser {
+ ep_state_t state;
+ int props[5]; /* properties are stored here */
+ int maxprops; /* size of the props[] array */
+ int numprops; /* number of properties found */
+ int termchar; /* terminator char, or 0 for any alpha */
+ int current; /* current (partial) property value */
+};
+
+/**
+ * Initialise the escape sequence parser at *parser.
+ *
+ * If termchar is 0 any alpha char terminates ok. Otherwise only the given
+ * char terminates successfully.
+ * Run the parser state machine with calls to parseEscapeSequence() for each char.
+ */
+static void initParseEscapeSeq(struct esc_parser *parser, int termchar)
+{
+ parser->state = EP_START;
+ parser->maxprops = sizeof(parser->props) / sizeof(*parser->props);
+ parser->numprops = 0;
+ parser->current = 0;
+ parser->termchar = termchar;
+}
+
+/**
+ * Pass character 'ch' into the state machine to parse:
+ * 'ESC' '[' <digits> (';' <digits>)* <termchar>
+ *
+ * The first character must be ESC.
+ * Returns the current state. The state machine is done when it returns either EP_END
+ * or EP_ERROR.
+ *
+ * On EP_END, the "property/attribute" values can be read from parser->props[]
+ * of length parser->numprops.
+ */
+static int parseEscapeSequence(struct esc_parser *parser, int ch)
+{
+ switch (parser->state) {
+ case EP_START:
+ parser->state = (ch == '\x1b') ? EP_ESC : EP_ERROR;
+ break;
+ case EP_ESC:
+ parser->state = (ch == '[') ? EP_DIGITS : EP_ERROR;
+ break;
+ case EP_PROPS:
+ if (ch == ';') {
+ parser->state = EP_DIGITS;
+donedigits:
+ if (parser->numprops + 1 < parser->maxprops) {
+ parser->props[parser->numprops++] = parser->current;
+ parser->current = 0;
+ }
+ break;
+ }
+ /* fall through */
+ case EP_DIGITS:
+ if (ch >= '0' && ch <= '9') {
+ parser->current = parser->current * 10 + (ch - '0');
+ parser->state = EP_PROPS;
+ break;
+ }
+ /* must be terminator */
+ if (parser->termchar != ch) {
+ if (parser->termchar != 0 || !((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z'))) {
+ parser->state = EP_ERROR;
+ break;
+ }
+ }
+ parser->state = EP_END;
+ goto donedigits;
+ case EP_END:
+ parser->state = EP_ERROR;
+ break;
+ case EP_ERROR:
+ break;
+ }
+ return parser->state;
+}
+
+/*#define DEBUG_REFRESHLINE*/
+
+#ifdef DEBUG_REFRESHLINE
+#define DRL(ARGS...) fprintf(dfh, ARGS)
+static FILE *dfh;
+
+static void DRL_CHAR(int ch)
+{
+ if (ch < ' ') {
+ DRL("^%c", ch + '@');
+ }
+ else if (ch > 127) {
+ DRL("\\u%04x", ch);
+ }
+ else {
+ DRL("%c", ch);
+ }
+}
+static void DRL_STR(const char *str)
+{
+ while (*str) {
+ int ch;
+ int n = utf8_tounicode(str, &ch);
+ str += n;
+ DRL_CHAR(ch);
+ }
+}
+#else
+#define DRL(...)
+#define DRL_CHAR(ch)
+#define DRL_STR(str)
+#endif
+
+#if defined(USE_WINCONSOLE)
+#include "linenoise-win32.c"
+#endif
+
+#if defined(USE_TERMIOS)
+static void linenoiseAtExit(void);
+static struct termios orig_termios; /* in order to restore at exit */
+static int rawmode = 0; /* for atexit() function to check if restore is needed*/
+static int atexit_registered = 0; /* register atexit just 1 time */
+
+static const char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
+
+static int isUnsupportedTerm(void) {
+ char *term = getenv("TERM");
+
+ if (term) {
+ int j;
+ for (j = 0; unsupported_term[j]; j++) {
+ if (strcmp(term, unsupported_term[j]) == 0) {
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+static int enableRawMode(struct current *current) {
+ struct termios raw;
+
+ current->fd = STDIN_FILENO;
+ current->cols = 0;
+
+ if (!isatty(current->fd) || isUnsupportedTerm() ||
+ tcgetattr(current->fd, &orig_termios) == -1) {
+fatal:
+ errno = ENOTTY;
+ return -1;
+ }
+
+ if (!atexit_registered) {
+ atexit(linenoiseAtExit);
+ atexit_registered = 1;
+ }
+
+ raw = orig_termios; /* modify the original mode */
+ /* input modes: no break, no CR to NL, no parity check, no strip char,
+ * no start/stop output control. */
+ raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
+ /* output modes - actually, no need to disable post processing */
+ /*raw.c_oflag &= ~(OPOST);*/
+ /* control modes - set 8 bit chars */
+ raw.c_cflag |= (CS8);
+ /* local modes - choing off, canonical off, no extended functions,
+ * no signal chars (^Z,^C) */
+ raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
+ /* control chars - set return condition: min number of bytes and timer.
+ * We want read to return every single byte, without timeout. */
+ raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */
+
+ /* put terminal in raw mode. Because we aren't changing any output
+ * settings we don't need to use TCSADRAIN and I have seen that hang on
+ * OpenBSD when running under a pty
+ */
+ if (tcsetattr(current->fd,TCSANOW,&raw) < 0) {
+ goto fatal;
+ }
+ rawmode = 1;
+ return 0;
+}
+
+static void disableRawMode(struct current *current) {
+ /* Don't even check the return value as it's too late. */
+ if (rawmode && tcsetattr(current->fd,TCSANOW,&orig_termios) != -1)
+ rawmode = 0;
+}
+
+/* At exit we'll try to fix the terminal to the initial conditions. */
+static void linenoiseAtExit(void) {
+ if (rawmode) {
+ tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios);
+ }
+ linenoiseHistoryFree();
+}
+
+/* gcc/glibc insists that we care about the return code of write!
+ * Clarification: This means that a void-cast like "(void) (EXPR)"
+ * does not work.
+ */
+#define IGNORE_RC(EXPR) if (EXPR) {}
+
+/**
+ * Output bytes directly, or accumulate output (if current->output is set)
+ */
+static void outputChars(struct current *current, const char *buf, int len)
+{
+ if (len < 0) {
+ len = strlen(buf);
+ }
+ if (current->output) {
+ sb_append_len(current->output, buf, len);
+ }
+ else {
+ IGNORE_RC(write(current->fd, buf, len));
+ }
+}
+
+/* Like outputChars, but using printf-style formatting
+ */
+static void outputFormatted(struct current *current, const char *format, ...)
+{
+ va_list args;
+ char buf[64];
+ int n;
+
+ va_start(args, format);
+ n = vsnprintf(buf, sizeof(buf), format, args);
+ /* This will never happen because we are sure to use outputFormatted() only for short sequences */
+ assert(n < (int)sizeof(buf));
+ va_end(args);
+ outputChars(current, buf, n);
+}
+
+static void cursorToLeft(struct current *current)
+{
+ outputChars(current, "\r", -1);
+}
+
+static void setOutputHighlight(struct current *current, const int *props, int nprops)
+{
+ outputChars(current, "\x1b[", -1);
+ while (nprops--) {
+ outputFormatted(current, "%d%c", *props, (nprops == 0) ? 'm' : ';');
+ props++;
+ }
+}
+
+static void eraseEol(struct current *current)
+{
+ outputChars(current, "\x1b[0K", -1);
+}
+
+static void setCursorPos(struct current *current, int x)
+{
+ if (x == 0) {
+ cursorToLeft(current);
+ }
+ else {
+ outputFormatted(current, "\r\x1b[%dC", x);
+ }
+}
+
+static void cursorUp(struct current *current, int n)
+{
+ if (n) {
+ outputFormatted(current, "\x1b[%dA", n);
+ }
+}
+
+static void cursorDown(struct current *current, int n)
+{
+ if (n) {
+ outputFormatted(current, "\x1b[%dB", n);
+ }
+}
+
+void linenoiseClearScreen(void)
+{
+ IGNORE_RC(write(STDOUT_FILENO, "\x1b[H\x1b[2J", 7));
+}
+
+/**
+ * Reads a char from 'current->fd', waiting at most 'timeout' milliseconds.
+ *
+ * A timeout of -1 means to wait forever.
+ *
+ * Returns -1 if no char is received within the time or an error occurs.
+ */
+static int fd_read_char(struct current *current, int timeout)
+{
+ struct pollfd p;
+ unsigned char c;
+
+ if (current->pending) {
+ c = current->pending;
+ current->pending = 0;
+ return c;
+ }
+
+ p.fd = current->fd;
+ p.events = POLLIN;
+
+ if (poll(&p, 1, timeout) == 0) {
+ /* timeout */
+ return -1;
+ }
+ if (read(current->fd, &c, 1) != 1) {
+ return -1;
+ }
+ return c;
+}
+
+/**
+ * Reads a complete utf-8 character
+ * and returns the unicode value, or -1 on error.
+ */
+static int fd_read(struct current *current)
+{
+#ifdef USE_UTF8
+ char buf[MAX_UTF8_LEN];
+ int n;
+ int i;
+ int c;
+
+ if (current->pending) {
+ buf[0] = current->pending;
+ current->pending = 0;
+ }
+ else if (read(current->fd, &buf[0], 1) != 1) {
+ return -1;
+ }
+ n = utf8_charlen(buf[0]);
+ if (n < 1) {
+ return -1;
+ }
+ for (i = 1; i < n; i++) {
+ if (read(current->fd, &buf[i], 1) != 1) {
+ return -1;
+ }
+ }
+ /* decode and return the character */
+ utf8_tounicode(buf, &c);
+ return c;
+#else
+ return fd_read_char(current, -1);
+#endif
+}
+
+
+/**
+ * Stores the current cursor column in '*cols'.
+ * Returns 1 if OK, or 0 if failed to determine cursor pos.
+ */
+static int queryCursor(struct current *current, int* cols)
+{
+ struct esc_parser parser;
+ int ch;
+ /* Unfortunately we don't have any persistent state, so assume
+ * a process will only ever interact with one terminal at a time.
+ */
+ static int query_cursor_failed;
+
+ if (query_cursor_failed) {
+ /* If it ever fails, don't try again */
+ return 0;
+ }
+
+ /* Should not be buffering this output, it needs to go immediately */
+ assert(current->output == NULL);
+
+ /* control sequence - report cursor location */
+ outputChars(current, "\x1b[6n", -1);
+
+ /* Parse the response: ESC [ rows ; cols R */
+ initParseEscapeSeq(&parser, 'R');
+ while ((ch = fd_read_char(current, 100)) > 0) {
+ switch (parseEscapeSequence(&parser, ch)) {
+ default:
+ continue;
+ case EP_END:
+ if (parser.numprops == 2 && parser.props[1] < 1000) {
+ *cols = parser.props[1];
+ return 1;
+ }
+ break;
+ case EP_ERROR:
+ /* Push back the character that caused the error */
+ current->pending = ch;
+ break;
+ }
+ /* failed */
+ break;
+ }
+ query_cursor_failed = 1;
+ return 0;
+}
+
+/**
+ * Updates current->cols with the current window size (width)
+ */
+static int getWindowSize(struct current *current)
+{
+ struct winsize ws;
+
+ if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 && ws.ws_col != 0) {
+ current->cols = ws.ws_col;
+ return 0;
+ }
+
+ /* Failed to query the window size. Perhaps we are on a serial terminal.
+ * Try to query the width by sending the cursor as far to the right
+ * and reading back the cursor position.
+ * Note that this is only done once per call to linenoise rather than
+ * every time the line is refreshed for efficiency reasons.
+ *
+ * In more detail, we:
+ * (a) request current cursor position,
+ * (b) move cursor far right,
+ * (c) request cursor position again,
+ * (d) at last move back to the old position.
+ * This gives us the width without messing with the externally
+ * visible cursor position.
+ */
+
+ if (current->cols == 0) {
+ int here;
+
+ /* If anything fails => default 80 */
+ current->cols = 80;
+
+ /* (a) */
+ if (queryCursor (current, &here)) {
+ /* (b) */
+ setCursorPos(current, 999);
+
+ /* (c). Note: If (a) succeeded, then (c) should as well.
+ * For paranoia we still check and have a fallback action
+ * for (d) in case of failure..
+ */
+ if (queryCursor (current, &current->cols)) {
+ /* (d) Reset the cursor back to the original location. */
+ if (current->cols > here) {
+ setCursorPos(current, here);
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * If CHAR_ESCAPE was received, reads subsequent
+ * chars to determine if this is a known special key.
+ *
+ * Returns SPECIAL_NONE if unrecognised, or -1 if EOF.
+ *
+ * If no additional char is received within a short time,
+ * CHAR_ESCAPE is returned.
+ */
+static int check_special(struct current *current)
+{
+ int c = fd_read_char(current, 50);
+ int c2;
+
+ if (c < 0) {
+ return CHAR_ESCAPE;
+ }
+ else if (c >= 'a' && c <= 'z') {
+ /* esc-a => meta-a */
+ return meta(c);
+ }
+
+ c2 = fd_read_char(current, 50);
+ if (c2 < 0) {
+ return c2;
+ }
+ if (c == '[' || c == 'O') {
+ /* Potential arrow key */
+ switch (c2) {
+ case 'A':
+ return SPECIAL_UP;
+ case 'B':
+ return SPECIAL_DOWN;
+ case 'C':
+ return SPECIAL_RIGHT;
+ case 'D':
+ return SPECIAL_LEFT;
+ case 'F':
+ return SPECIAL_END;
+ case 'H':
+ return SPECIAL_HOME;
+ }
+ }
+ if (c == '[' && c2 >= '1' && c2 <= '8') {
+ /* extended escape */
+ c = fd_read_char(current, 50);
+ if (c == '~') {
+ switch (c2) {
+ case '2':
+ return SPECIAL_INSERT;
+ case '3':
+ return SPECIAL_DELETE;
+ case '5':
+ return SPECIAL_PAGE_UP;
+ case '6':
+ return SPECIAL_PAGE_DOWN;
+ case '7':
+ return SPECIAL_HOME;
+ case '8':
+ return SPECIAL_END;
+ }
+ }
+ while (c != -1 && c != '~') {
+ /* .e.g \e[12~ or '\e[11;2~ discard the complete sequence */
+ c = fd_read_char(current, 50);
+ }
+ }
+
+ return SPECIAL_NONE;
+}
+#endif
+
+static void clearOutputHighlight(struct current *current)
+{
+ int nohighlight = 0;
+ setOutputHighlight(current, &nohighlight, 1);
+}
+
+static void outputControlChar(struct current *current, char ch)
+{
+ int reverse = 7;
+ setOutputHighlight(current, &reverse, 1);
+ outputChars(current, "^", 1);
+ outputChars(current, &ch, 1);
+ clearOutputHighlight(current);
+}
+
+#ifndef utf8_getchars
+static int utf8_getchars(char *buf, int c)
+{
+#ifdef USE_UTF8
+ return utf8_fromunicode(buf, c);
+#else
+ *buf = c;
+ return 1;
+#endif
+}
+#endif
+
+/**
+ * Returns the unicode character at the given offset,
+ * or -1 if none.
+ */
+static int get_char(struct current *current, int pos)
+{
+ if (pos >= 0 && pos < sb_chars(current->buf)) {
+ int c;
+ int i = utf8_index(sb_str(current->buf), pos);
+ (void)utf8_tounicode(sb_str(current->buf) + i, &c);
+ return c;
+ }
+ return -1;
+}
+
+static int char_display_width(int ch)
+{
+ if (ch < ' ') {
+ /* control chars take two positions */
+ return 2;
+ }
+ else {
+ return utf8_width(ch);
+ }
+}
+
+#ifndef NO_COMPLETION
+static linenoiseCompletionCallback *completionCallback = NULL;
+static void *completionUserdata = NULL;
+static int showhints = 1;
+static linenoiseHintsCallback *hintsCallback = NULL;
+static linenoiseFreeHintsCallback *freeHintsCallback = NULL;
+static void *hintsUserdata = NULL;
+
+static void beep(void) {
+#ifdef USE_TERMIOS
+ fprintf(stderr, "\x7");
+ fflush(stderr);
+#endif
+}
+
+static void freeCompletions(linenoiseCompletions *lc) {
+ size_t i;
+ for (i = 0; i < lc->len; i++)
+ free(lc->cvec[i]);
+ free(lc->cvec);
+}
+
+static int completeLine(struct current *current) {
+ linenoiseCompletions lc = { 0, NULL };
+ int c = 0;
+
+ completionCallback(sb_str(current->buf),&lc,completionUserdata);
+ if (lc.len == 0) {
+ beep();
+ } else {
+ size_t stop = 0, i = 0;
+
+ while(!stop) {
+ /* Show completion or original buffer */
+ if (i < lc.len) {
+ int chars = utf8_strlen(lc.cvec[i], -1);
+ refreshLineAlt(current, current->prompt, lc.cvec[i], chars);
+ } else {
+ refreshLine(current);
+ }
+
+ c = fd_read(current);
+ if (c == -1) {
+ break;
+ }
+
+ switch(c) {
+ case '\t': /* tab */
+ i = (i+1) % (lc.len+1);
+ if (i == lc.len) beep();
+ break;
+ case CHAR_ESCAPE: /* escape */
+ /* Re-show original buffer */
+ if (i < lc.len) {
+ refreshLine(current);
+ }
+ stop = 1;
+ break;
+ default:
+ /* Update buffer and return */
+ if (i < lc.len) {
+ set_current(current,lc.cvec[i]);
+ }
+ stop = 1;
+ break;
+ }
+ }
+ }
+
+ freeCompletions(&lc);
+ return c; /* Return last read character */
+}
+
+/* Register a callback function to be called for tab-completion.
+ Returns the prior callback so that the caller may (if needed)
+ restore it when done. */
+linenoiseCompletionCallback * linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn, void *userdata) {
+ linenoiseCompletionCallback * old = completionCallback;
+ completionCallback = fn;
+ completionUserdata = userdata;
+ return old;
+}
+
+void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
+ lc->cvec = (char **)realloc(lc->cvec,sizeof(char*)*(lc->len+1));
+ lc->cvec[lc->len++] = strdup(str);
+}
+
+void linenoiseSetHintsCallback(linenoiseHintsCallback *callback, void *userdata)
+{
+ hintsCallback = callback;
+ hintsUserdata = userdata;
+}
+
+void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *callback)
+{
+ freeHintsCallback = callback;
+}
+
+#endif
+
+
+static const char *reduceSingleBuf(const char *buf, int availcols, int *cursor_pos)
+{
+ /* We have availcols columns available.
+ * If necessary, strip chars off the front of buf until *cursor_pos
+ * fits within availcols
+ */
+ int needcols = 0;
+ int pos = 0;
+ int new_cursor_pos = *cursor_pos;
+ const char *pt = buf;
+
+ DRL("reduceSingleBuf: availcols=%d, cursor_pos=%d\n", availcols, *cursor_pos);
+
+ while (*pt) {
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+ pt += n;
+
+ needcols += char_display_width(ch);
+
+ /* If we need too many cols, strip
+ * chars off the front of buf to make it fit.
+ * We keep 3 extra cols to the right of the cursor.
+ * 2 for possible wide chars, 1 for the last column that
+ * can't be used.
+ */
+ while (needcols >= availcols - 3) {
+ n = utf8_tounicode(buf, &ch);
+ buf += n;
+ needcols -= char_display_width(ch);
+ DRL_CHAR(ch);
+
+ /* and adjust the apparent cursor position */
+ new_cursor_pos--;
+
+ if (buf == pt) {
+ /* can't remove more than this */
+ break;
+ }
+ }
+
+ if (pos++ == *cursor_pos) {
+ break;
+ }
+
+ }
+ DRL("<snip>");
+ DRL_STR(buf);
+ DRL("\nafter reduce, needcols=%d, new_cursor_pos=%d\n", needcols, new_cursor_pos);
+
+ /* Done, now new_cursor_pos contains the adjusted cursor position
+ * and buf points to he adjusted start
+ */
+ *cursor_pos = new_cursor_pos;
+ return buf;
+}
+
+static int mlmode = 0;
+
+void linenoiseSetMultiLine(int enableml)
+{
+ mlmode = enableml;
+}
+
+/* Helper of refreshSingleLine() and refreshMultiLine() to show hints
+ * to the right of the prompt.
+ * Returns 1 if a hint was shown, or 0 if not
+ * If 'display' is 0, does no output. Just returns the appropriate return code.
+ */
+static int refreshShowHints(struct current *current, const char *buf, int availcols, int display)
+{
+ int rc = 0;
+ if (showhints && hintsCallback && availcols > 0) {
+ int bold = 0;
+ int color = -1;
+ char *hint = hintsCallback(buf, &color, &bold, hintsUserdata);
+ if (hint) {
+ rc = 1;
+ if (display) {
+ const char *pt;
+ if (bold == 1 && color == -1) color = 37;
+ if (bold || color > 0) {
+ int props[3] = { bold, color, 49 }; /* bold, color, fgnormal */
+ setOutputHighlight(current, props, 3);
+ }
+ DRL("<hint bold=%d,color=%d>", bold, color);
+ pt = hint;
+ while (*pt) {
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+ int width = char_display_width(ch);
+
+ if (width >= availcols) {
+ DRL("<hinteol>");
+ break;
+ }
+ DRL_CHAR(ch);
+
+ availcols -= width;
+ outputChars(current, pt, n);
+ pt += n;
+ }
+ if (bold || color > 0) {
+ clearOutputHighlight(current);
+ }
+ /* Call the function to free the hint returned. */
+ if (freeHintsCallback) freeHintsCallback(hint, hintsUserdata);
+ }
+ }
+ }
+ return rc;
+}
+
+#ifdef USE_TERMIOS
+static void refreshStart(struct current *current)
+{
+ /* We accumulate all output here */
+ assert(current->output == NULL);
+ current->output = sb_alloc();
+}
+
+static void refreshEnd(struct current *current)
+{
+ /* Output everything at once */
+ IGNORE_RC(write(current->fd, sb_str(current->output), sb_len(current->output)));
+ sb_free(current->output);
+ current->output = NULL;
+}
+
+static void refreshStartChars(struct current *current)
+{
+ (void)current;
+}
+
+static void refreshNewline(struct current *current)
+{
+ DRL("<nl>");
+ outputChars(current, "\n", 1);
+}
+
+static void refreshEndChars(struct current *current)
+{
+ (void)current;
+}
+#endif
+
+static void refreshLineAlt(struct current *current, const char *prompt, const char *buf, int cursor_pos)
+{
+ int i;
+ const char *pt;
+ int displaycol;
+ int displayrow;
+ int visible;
+ int currentpos;
+ int notecursor;
+ int cursorcol = 0;
+ int cursorrow = 0;
+ int hint;
+ struct esc_parser parser;
+
+#ifdef DEBUG_REFRESHLINE
+ dfh = fopen("linenoise.debuglog", "a");
+#endif
+
+ /* Should intercept SIGWINCH. For now, just get the size every time */
+ getWindowSize(current);
+
+ refreshStart(current);
+
+ DRL("wincols=%d, cursor_pos=%d, nrows=%d, rpos=%d\n", current->cols, cursor_pos, current->nrows, current->rpos);
+
+ /* Here is the plan:
+ * (a) move the the bottom row, going down the appropriate number of lines
+ * (b) move to beginning of line and erase the current line
+ * (c) go up one line and do the same, until we have erased up to the first row
+ * (d) output the prompt, counting cols and rows, taking into account escape sequences
+ * (e) output the buffer, counting cols and rows
+ * (e') when we hit the current pos, save the cursor position
+ * (f) move the cursor to the saved cursor position
+ * (g) save the current cursor row and number of rows
+ */
+
+ /* (a) - The cursor is currently at row rpos */
+ cursorDown(current, current->nrows - current->rpos - 1);
+ DRL("<cud=%d>", current->nrows - current->rpos - 1);
+
+ /* (b), (c) - Erase lines upwards until we get to the first row */
+ for (i = 0; i < current->nrows; i++) {
+ if (i) {
+ DRL("<cup>");
+ cursorUp(current, 1);
+ }
+ DRL("<clearline>");
+ cursorToLeft(current);
+ eraseEol(current);
+ }
+ DRL("\n");
+
+ /* (d) First output the prompt. control sequences don't take up display space */
+ pt = prompt;
+ displaycol = 0; /* current display column */
+ displayrow = 0; /* current display row */
+ visible = 1;
+
+ refreshStartChars(current);
+
+ while (*pt) {
+ int width;
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+
+ if (visible && ch == CHAR_ESCAPE) {
+ /* The start of an escape sequence, so not visible */
+ visible = 0;
+ initParseEscapeSeq(&parser, 'm');
+ DRL("<esc-seq-start>");
+ }
+
+ if (ch == '\n' || ch == '\r') {
+ /* treat both CR and NL the same and force wrap */
+ refreshNewline(current);
+ displaycol = 0;
+ displayrow++;
+ }
+ else {
+ width = visible * utf8_width(ch);
+
+ displaycol += width;
+ if (displaycol >= current->cols) {
+ /* need to wrap to the next line because of newline or if it doesn't fit
+ * XXX this is a problem in single line mode
+ */
+ refreshNewline(current);
+ displaycol = width;
+ displayrow++;
+ }
+
+ DRL_CHAR(ch);
+#ifdef USE_WINCONSOLE
+ if (visible) {
+ outputChars(current, pt, n);
+ }
+#else
+ outputChars(current, pt, n);
+#endif
+ }
+ pt += n;
+
+ if (!visible) {
+ switch (parseEscapeSequence(&parser, ch)) {
+ case EP_END:
+ visible = 1;
+ setOutputHighlight(current, parser.props, parser.numprops);
+ DRL("<esc-seq-end,numprops=%d>", parser.numprops);
+ break;
+ case EP_ERROR:
+ DRL("<esc-seq-err>");
+ visible = 1;
+ break;
+ }
+ }
+ }
+
+ /* Now we are at the first line with all lines erased */
+ DRL("\nafter prompt: displaycol=%d, displayrow=%d\n", displaycol, displayrow);
+
+
+ /* (e) output the buffer, counting cols and rows */
+ if (mlmode == 0) {
+ /* In this mode we may need to trim chars from the start of the buffer until the
+ * cursor fits in the window.
+ */
+ pt = reduceSingleBuf(buf, current->cols - displaycol, &cursor_pos);
+ }
+ else {
+ pt = buf;
+ }
+
+ currentpos = 0;
+ notecursor = -1;
+
+ while (*pt) {
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+ int width = char_display_width(ch);
+
+ if (currentpos == cursor_pos) {
+ /* (e') wherever we output this character is where we want the cursor */
+ notecursor = 1;
+ }
+
+ if (displaycol + width >= current->cols) {
+ if (mlmode == 0) {
+ /* In single line mode stop once we print as much as we can on one line */
+ DRL("<slmode>");
+ break;
+ }
+ /* need to wrap to the next line since it doesn't fit */
+ refreshNewline(current);
+ displaycol = 0;
+ displayrow++;
+ }
+
+ if (notecursor == 1) {
+ /* (e') Save this position as the current cursor position */
+ cursorcol = displaycol;
+ cursorrow = displayrow;
+ notecursor = 0;
+ DRL("<cursor>");
+ }
+
+ displaycol += width;
+
+ if (ch < ' ') {
+ outputControlChar(current, ch + '@');
+ }
+ else {
+ outputChars(current, pt, n);
+ }
+ DRL_CHAR(ch);
+ if (width != 1) {
+ DRL("<w=%d>", width);
+ }
+
+ pt += n;
+ currentpos++;
+ }
+
+ /* If we didn't see the cursor, it is at the current location */
+ if (notecursor) {
+ DRL("<cursor>");
+ cursorcol = displaycol;
+ cursorrow = displayrow;
+ }
+
+ DRL("\nafter buf: displaycol=%d, displayrow=%d, cursorcol=%d, cursorrow=%d\n", displaycol, displayrow, cursorcol, cursorrow);
+
+ /* (f) show hints */
+ hint = refreshShowHints(current, buf, current->cols - displaycol, 1);
+
+ /* Remember how many many cols are available for insert optimisation */
+ if (prompt == current->prompt && hint == 0) {
+ current->colsright = current->cols - displaycol;
+ current->colsleft = displaycol;
+ }
+ else {
+ /* Can't optimise */
+ current->colsright = 0;
+ current->colsleft = 0;
+ }
+ DRL("\nafter hints: colsleft=%d, colsright=%d\n\n", current->colsleft, current->colsright);
+
+ refreshEndChars(current);
+
+ /* (g) move the cursor to the correct place */
+ cursorUp(current, displayrow - cursorrow);
+ setCursorPos(current, cursorcol);
+
+ /* (h) Update the number of rows if larger, but never reduce this */
+ if (displayrow >= current->nrows) {
+ current->nrows = displayrow + 1;
+ }
+ /* And remember the row that the cursor is on */
+ current->rpos = cursorrow;
+
+ refreshEnd(current);
+
+#ifdef DEBUG_REFRESHLINE
+ fclose(dfh);
+#endif
+}
+
+static void refreshLine(struct current *current)
+{
+ refreshLineAlt(current, current->prompt, sb_str(current->buf), current->pos);
+}
+
+static void set_current(struct current *current, const char *str)
+{
+ sb_clear(current->buf);
+ sb_append(current->buf, str);
+ current->pos = sb_chars(current->buf);
+}
+
+/**
+ * Removes the char at 'pos'.
+ *
+ * Returns 1 if the line needs to be refreshed, 2 if not
+ * and 0 if nothing was removed
+ */
+static int remove_char(struct current *current, int pos)
+{
+ if (pos >= 0 && pos < sb_chars(current->buf)) {
+ int offset = utf8_index(sb_str(current->buf), pos);
+ int nbytes = utf8_index(sb_str(current->buf) + offset, 1);
+ int rc = 1;
+
+ /* Now we try to optimise in the simple but very common case that:
+ * - outputChars() can be used directly (not win32)
+ * - we are removing the char at EOL
+ * - the buffer is not empty
+ * - there are columns available to the left
+ * - the char being deleted is not a wide or utf-8 character
+ * - no hints are being shown
+ */
+ if (current->output && current->pos == pos + 1 && current->pos == sb_chars(current->buf) && pos > 0) {
+#ifdef USE_UTF8
+ /* Could implement utf8_prev_len() but simplest just to not optimise this case */
+ char last = sb_str(current->buf)[offset];
+#else
+ char last = 0;
+#endif
+ if (current->colsleft > 0 && (last & 0x80) == 0) {
+ /* Have cols on the left and not a UTF-8 char or continuation */
+ /* Yes, can optimise */
+ current->colsleft--;
+ current->colsright++;
+ rc = 2;
+ }
+ }
+
+ sb_delete(current->buf, offset, nbytes);
+
+ if (current->pos > pos) {
+ current->pos--;
+ }
+ if (rc == 2) {
+ if (refreshShowHints(current, sb_str(current->buf), current->colsright, 0)) {
+ /* A hint needs to be shown, so can't optimise after all */
+ rc = 1;
+ }
+ else {
+ /* optimised output */
+ outputChars(current, "\b \b", 3);
+ }
+ }
+ return rc;
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * Insert 'ch' at position 'pos'
+ *
+ * Returns 1 if the line needs to be refreshed, 2 if not
+ * and 0 if nothing was inserted (no room)
+ */
+static int insert_char(struct current *current, int pos, int ch)
+{
+ if (pos >= 0 && pos <= sb_chars(current->buf)) {
+ char buf[MAX_UTF8_LEN + 1];
+ int offset = utf8_index(sb_str(current->buf), pos);
+ int n = utf8_getchars(buf, ch);
+ int rc = 1;
+
+ /* null terminate since sb_insert() requires it */
+ buf[n] = 0;
+
+ /* Now we try to optimise in the simple but very common case that:
+ * - outputChars() can be used directly (not win32)
+ * - we are inserting at EOL
+ * - there are enough columns available
+ * - no hints are being shown
+ */
+ if (current->output && pos == current->pos && pos == sb_chars(current->buf)) {
+ int width = char_display_width(ch);
+ if (current->colsright > width) {
+ /* Yes, can optimise */
+ current->colsright -= width;
+ current->colsleft -= width;
+ rc = 2;
+ }
+ }
+ sb_insert(current->buf, offset, buf);
+ if (current->pos >= pos) {
+ current->pos++;
+ }
+ if (rc == 2) {
+ if (refreshShowHints(current, sb_str(current->buf), current->colsright, 0)) {
+ /* A hint needs to be shown, so can't optimise after all */
+ rc = 1;
+ }
+ else {
+ /* optimised output */
+ outputChars(current, buf, n);
+ }
+ }
+ return rc;
+ }
+ return 0;
+}
+
+/**
+ * Captures up to 'n' characters starting at 'pos' for the cut buffer.
+ *
+ * This replaces any existing characters in the cut buffer.
+ */
+static void capture_chars(struct current *current, int pos, int nchars)
+{
+ if (pos >= 0 && (pos + nchars - 1) < sb_chars(current->buf)) {
+ int offset = utf8_index(sb_str(current->buf), pos);
+ int nbytes = utf8_index(sb_str(current->buf) + offset, nchars);
+
+ if (nbytes > 0) {
+ if (current->capture) {
+ sb_clear(current->capture);
+ }
+ else {
+ current->capture = sb_alloc();
+ }
+ sb_append_len(current->capture, sb_str(current->buf) + offset, nbytes);
+ }
+ }
+}
+
+/**
+ * Removes up to 'n' characters at cursor position 'pos'.
+ *
+ * Returns 0 if no chars were removed or non-zero otherwise.
+ */
+static int remove_chars(struct current *current, int pos, int n)
+{
+ int removed = 0;
+
+ /* First save any chars which will be removed */
+ capture_chars(current, pos, n);
+
+ while (n-- && remove_char(current, pos)) {
+ removed++;
+ }
+ return removed;
+}
+/**
+ * Inserts the characters (string) 'chars' at the cursor position 'pos'.
+ *
+ * Returns 0 if no chars were inserted or non-zero otherwise.
+ */
+static int insert_chars(struct current *current, int pos, const char *chars)
+{
+ int inserted = 0;
+
+ while (*chars) {
+ int ch;
+ int n = utf8_tounicode(chars, &ch);
+ if (insert_char(current, pos, ch) == 0) {
+ break;
+ }
+ inserted++;
+ pos++;
+ chars += n;
+ }
+ return inserted;
+}
+
+static int skip_space_nonspace(struct current *current, int dir, int check_is_space)
+{
+ int moved = 0;
+ int checkoffset = (dir < 0) ? -1 : 0;
+ int limit = (dir < 0) ? 0 : sb_chars(current->buf);
+ while (current->pos != limit && (get_char(current, current->pos + checkoffset) == ' ') == check_is_space) {
+ current->pos += dir;
+ moved++;
+ }
+ return moved;
+}
+
+static int skip_space(struct current *current, int dir)
+{
+ return skip_space_nonspace(current, dir, 1);
+}
+
+static int skip_nonspace(struct current *current, int dir)
+{
+ return skip_space_nonspace(current, dir, 0);
+}
+
+static void set_history_index(struct current *current, int new_index)
+{
+ if (history_len > 1) {
+ /* Update the current history entry before to
+ * overwrite it with the next one. */
+ free(history[history_len - 1 - history_index]);
+ history[history_len - 1 - history_index] = strdup(sb_str(current->buf));
+ /* Show the new entry */
+ history_index = new_index;
+ if (history_index < 0) {
+ history_index = 0;
+ } else if (history_index >= history_len) {
+ history_index = history_len - 1;
+ } else {
+ set_current(current, history[history_len - 1 - history_index]);
+ refreshLine(current);
+ }
+ }
+}
+
+/**
+ * Returns the keycode to process, or 0 if none.
+ */
+static int reverseIncrementalSearch(struct current *current)
+{
+ /* Display the reverse-i-search prompt and process chars */
+ char rbuf[50];
+ char rprompt[80];
+ int rchars = 0;
+ int rlen = 0;
+ int searchpos = history_len - 1;
+ int c;
+
+ rbuf[0] = 0;
+ while (1) {
+ int n = 0;
+ const char *p = NULL;
+ int skipsame = 0;
+ int searchdir = -1;
+
+ snprintf(rprompt, sizeof(rprompt), "(reverse-i-search)'%s': ", rbuf);
+ refreshLineAlt(current, rprompt, sb_str(current->buf), current->pos);
+ c = fd_read(current);
+ if (c == ctrl('H') || c == CHAR_DELETE) {
+ if (rchars) {
+ int p_ind = utf8_index(rbuf, --rchars);
+ rbuf[p_ind] = 0;
+ rlen = strlen(rbuf);
+ }
+ continue;
+ }
+#ifdef USE_TERMIOS
+ if (c == CHAR_ESCAPE) {
+ c = check_special(current);
+ }
+#endif
+ if (c == ctrl('R')) {
+ /* Search for the previous (earlier) match */
+ if (searchpos > 0) {
+ searchpos--;
+ }
+ skipsame = 1;
+ }
+ else if (c == ctrl('S')) {
+ /* Search for the next (later) match */
+ if (searchpos < history_len) {
+ searchpos++;
+ }
+ searchdir = 1;
+ skipsame = 1;
+ }
+ else if (c == ctrl('P') || c == SPECIAL_UP) {
+ /* Exit Ctrl-R mode and go to the previous history line from the current search pos */
+ set_history_index(current, history_len - searchpos);
+ c = 0;
+ break;
+ }
+ else if (c == ctrl('N') || c == SPECIAL_DOWN) {
+ /* Exit Ctrl-R mode and go to the next history line from the current search pos */
+ set_history_index(current, history_len - searchpos - 2);
+ c = 0;
+ break;
+ }
+ else if (c >= ' ' && c <= '~') {
+ /* >= here to allow for null terminator */
+ if (rlen >= (int)sizeof(rbuf) - MAX_UTF8_LEN) {
+ continue;
+ }
+
+ n = utf8_getchars(rbuf + rlen, c);
+ rlen += n;
+ rchars++;
+ rbuf[rlen] = 0;
+
+ /* Adding a new char resets the search location */
+ searchpos = history_len - 1;
+ }
+ else {
+ /* Exit from incremental search mode */
+ break;
+ }
+
+ /* Now search through the history for a match */
+ for (; searchpos >= 0 && searchpos < history_len; searchpos += searchdir) {
+ p = strstr(history[searchpos], rbuf);
+ if (p) {
+ /* Found a match */
+ if (skipsame && strcmp(history[searchpos], sb_str(current->buf)) == 0) {
+ /* But it is identical, so skip it */
+ continue;
+ }
+ /* Copy the matching line and set the cursor position */
+ history_index = history_len - 1 - searchpos;
+ set_current(current,history[searchpos]);
+ current->pos = utf8_strlen(history[searchpos], p - history[searchpos]);
+ break;
+ }
+ }
+ if (!p && n) {
+ /* No match, so don't add it */
+ rchars--;
+ rlen -= n;
+ rbuf[rlen] = 0;
+ }
+ }
+ if (c == ctrl('G') || c == ctrl('C')) {
+ /* ctrl-g terminates the search with no effect */
+ set_current(current, "");
+ history_index = 0;
+ c = 0;
+ }
+ else if (c == ctrl('J')) {
+ /* ctrl-j terminates the search leaving the buffer in place */
+ history_index = 0;
+ c = 0;
+ }
+ /* Go process the char normally */
+ refreshLine(current);
+ return c;
+}
+
+static int linenoiseEdit(struct current *current) {
+ history_index = 0;
+
+ refreshLine(current);
+
+ while(1) {
+ int c = fd_read(current);
+
+#ifndef NO_COMPLETION
+ /* Only autocomplete when the callback is set. It returns < 0 when
+ * there was an error reading from fd. Otherwise it will return the
+ * character that should be handled next. */
+ if (c == '\t' && current->pos == sb_chars(current->buf) && completionCallback != NULL) {
+ c = completeLine(current);
+ }
+#endif
+ if (c == ctrl('R')) {
+ /* reverse incremental search will provide an alternative keycode or 0 for none */
+ c = reverseIncrementalSearch(current);
+ /* go on to process the returned char normally */
+ }
+
+#ifdef USE_TERMIOS
+ if (c == CHAR_ESCAPE) { /* escape sequence */
+ c = check_special(current);
+ }
+#endif
+ if (c == -1) {
+ /* Return on errors */
+ return sb_len(current->buf);
+ }
+
+ switch(c) {
+ case SPECIAL_NONE:
+ break;
+ case '\r': /* enter/CR */
+ case '\n': /* LF */
+ history_len--;
+ free(history[history_len]);
+ current->pos = sb_chars(current->buf);
+ if (mlmode || hintsCallback) {
+ showhints = 0;
+ refreshLine(current);
+ showhints = 1;
+ }
+ return sb_len(current->buf);
+ case ctrl('C'): /* ctrl-c */
+ errno = EAGAIN;
+ return -1;
+ case ctrl('Z'): /* ctrl-z */
+#ifdef SIGTSTP
+ /* send ourselves SIGSUSP */
+ disableRawMode(current);
+ raise(SIGTSTP);
+ /* and resume */
+ enableRawMode(current);
+ refreshLine(current);
+#endif
+ continue;
+ case CHAR_DELETE: /* backspace */
+ case ctrl('H'):
+ if (remove_char(current, current->pos - 1) == 1) {
+ refreshLine(current);
+ }
+ break;
+ case ctrl('D'): /* ctrl-d */
+ if (sb_len(current->buf) == 0) {
+ /* Empty line, so EOF */
+ history_len--;
+ free(history[history_len]);
+ return -1;
+ }
+ /* Otherwise fall through to delete char to right of cursor */
+ /* fall-thru */
+ case SPECIAL_DELETE:
+ if (remove_char(current, current->pos) == 1) {
+ refreshLine(current);
+ }
+ break;
+ case SPECIAL_INSERT:
+ /* Ignore. Expansion Hook.
+ * Future possibility: Toggle Insert/Overwrite Modes
+ */
+ break;
+ case meta('b'): /* meta-b, move word left */
+ if (skip_nonspace(current, -1)) {
+ refreshLine(current);
+ }
+ else if (skip_space(current, -1)) {
+ skip_nonspace(current, -1);
+ refreshLine(current);
+ }
+ break;
+ case meta('f'): /* meta-f, move word right */
+ if (skip_space(current, 1)) {
+ refreshLine(current);
+ }
+ else if (skip_nonspace(current, 1)) {
+ skip_space(current, 1);
+ refreshLine(current);
+ }
+ break;
+ case ctrl('W'): /* ctrl-w, delete word at left. save deleted chars */
+ /* eat any spaces on the left */
+ {
+ int pos = current->pos;
+ while (pos > 0 && get_char(current, pos - 1) == ' ') {
+ pos--;
+ }
+
+ /* now eat any non-spaces on the left */
+ while (pos > 0 && get_char(current, pos - 1) != ' ') {
+ pos--;
+ }
+
+ if (remove_chars(current, pos, current->pos - pos)) {
+ refreshLine(current);
+ }
+ }
+ break;
+ case ctrl('T'): /* ctrl-t */
+ if (current->pos > 0 && current->pos <= sb_chars(current->buf)) {
+ /* If cursor is at end, transpose the previous two chars */
+ int fixer = (current->pos == sb_chars(current->buf));
+ c = get_char(current, current->pos - fixer);
+ remove_char(current, current->pos - fixer);
+ insert_char(current, current->pos - 1, c);
+ refreshLine(current);
+ }
+ break;
+ case ctrl('V'): /* ctrl-v */
+ /* Insert the ^V first */
+ if (insert_char(current, current->pos, c)) {
+ refreshLine(current);
+ /* Now wait for the next char. Can insert anything except \0 */
+ c = fd_read(current);
+
+ /* Remove the ^V first */
+ remove_char(current, current->pos - 1);
+ if (c > 0) {
+ /* Insert the actual char, can't be error or null */
+ insert_char(current, current->pos, c);
+ }
+ refreshLine(current);
+ }
+ break;
+ case ctrl('B'):
+ case SPECIAL_LEFT:
+ if (current->pos > 0) {
+ current->pos--;
+ refreshLine(current);
+ }
+ break;
+ case ctrl('F'):
+ case SPECIAL_RIGHT:
+ if (current->pos < sb_chars(current->buf)) {
+ current->pos++;
+ refreshLine(current);
+ }
+ break;
+ case SPECIAL_PAGE_UP: /* move to start of history */
+ set_history_index(current, history_len - 1);
+ break;
+ case SPECIAL_PAGE_DOWN: /* move to 0 == end of history, i.e. current */
+ set_history_index(current, 0);
+ break;
+ case ctrl('P'):
+ case SPECIAL_UP:
+ set_history_index(current, history_index + 1);
+ break;
+ case ctrl('N'):
+ case SPECIAL_DOWN:
+ set_history_index(current, history_index - 1);
+ break;
+ case ctrl('A'): /* Ctrl+a, go to the start of the line */
+ case SPECIAL_HOME:
+ current->pos = 0;
+ refreshLine(current);
+ break;
+ case ctrl('E'): /* ctrl+e, go to the end of the line */
+ case SPECIAL_END:
+ current->pos = sb_chars(current->buf);
+ refreshLine(current);
+ break;
+ case ctrl('U'): /* Ctrl+u, delete to beginning of line, save deleted chars. */
+ if (remove_chars(current, 0, current->pos)) {
+ refreshLine(current);
+ }
+ break;
+ case ctrl('K'): /* Ctrl+k, delete from current to end of line, save deleted chars. */
+ if (remove_chars(current, current->pos, sb_chars(current->buf) - current->pos)) {
+ refreshLine(current);
+ }
+ break;
+ case ctrl('Y'): /* Ctrl+y, insert saved chars at current position */
+ if (current->capture && insert_chars(current, current->pos, sb_str(current->capture))) {
+ refreshLine(current);
+ }
+ break;
+ case ctrl('L'): /* Ctrl+L, clear screen */
+ linenoiseClearScreen();
+ /* Force recalc of window size for serial terminals */
+ current->cols = 0;
+ current->rpos = 0;
+ refreshLine(current);
+ break;
+ default:
+ if (c >= meta('a') && c <= meta('z')) {
+ /* Don't insert meta chars that are not bound */
+ break;
+ }
+ /* Only tab is allowed without ^V */
+ if (c == '\t' || c >= ' ') {
+ if (insert_char(current, current->pos, c) == 1) {
+ refreshLine(current);
+ }
+ }
+ break;
+ }
+ }
+ return sb_len(current->buf);
+}
+
+int linenoiseColumns(void)
+{
+ struct current current;
+ current.output = NULL;
+ enableRawMode (&current);
+ getWindowSize (&current);
+ disableRawMode (&current);
+ return current.cols;
+}
+
+/**
+ * Reads a line from the file handle (without the trailing NL or CRNL)
+ * and returns it in a stringbuf.
+ * Returns NULL if no characters are read before EOF or error.
+ *
+ * Note that the character count will *not* be correct for lines containing
+ * utf8 sequences. Do not rely on the character count.
+ */
+static stringbuf *sb_getline(FILE *fh)
+{
+ stringbuf *sb = sb_alloc();
+ int c;
+ int n = 0;
+
+ while ((c = getc(fh)) != EOF) {
+ char ch;
+ n++;
+ if (c == '\r') {
+ /* CRLF -> LF */
+ continue;
+ }
+ if (c == '\n' || c == '\r') {
+ break;
+ }
+ ch = c;
+ /* ignore the effect of character count for partial utf8 sequences */
+ sb_append_len(sb, &ch, 1);
+ }
+ if (n == 0 || sb->data == NULL) {
+ sb_free(sb);
+ return NULL;
+ }
+ return sb;
+}
+
+char *linenoiseWithInitial(const char *prompt, const char *initial)
+{
+ int count;
+ struct current current;
+ stringbuf *sb;
+
+ memset(&current, 0, sizeof(current));
+
+ if (enableRawMode(&current) == -1) {
+ printf("%s", prompt);
+ fflush(stdout);
+ sb = sb_getline(stdin);
+ if (sb && !fd_isatty(&current)) {
+ printf("%s\n", sb_str(sb));
+ fflush(stdout);
+ }
+ }
+ else {
+ current.buf = sb_alloc();
+ current.pos = 0;
+ current.nrows = 1;
+ current.prompt = prompt;
+
+ /* The latest history entry is always our current buffer */
+ linenoiseHistoryAdd(initial);
+ set_current(&current, initial);
+
+ count = linenoiseEdit(&current);
+
+ disableRawMode(&current);
+ printf("\n");
+
+ sb_free(current.capture);
+ if (count == -1) {
+ sb_free(current.buf);
+ return NULL;
+ }
+ sb = current.buf;
+ }
+ return sb ? sb_to_string(sb) : NULL;
+}
+
+char *linenoise(const char *prompt)
+{
+ return linenoiseWithInitial(prompt, "");
+}
+
+/* Using a circular buffer is smarter, but a bit more complex to handle. */
+static int linenoiseHistoryAddAllocated(char *line) {
+
+ if (history_max_len == 0) {
+notinserted:
+ free(line);
+ return 0;
+ }
+ if (history == NULL) {
+ history = (char **)calloc(sizeof(char*), history_max_len);
+ }
+
+ /* do not insert duplicate lines into history */
+ if (history_len > 0 && strcmp(line, history[history_len - 1]) == 0) {
+ goto notinserted;
+ }
+
+ if (history_len == history_max_len) {
+ free(history[0]);
+ memmove(history,history+1,sizeof(char*)*(history_max_len-1));
+ history_len--;
+ }
+ history[history_len] = line;
+ history_len++;
+ return 1;
+}
+
+int linenoiseHistoryAdd(const char *line) {
+ return linenoiseHistoryAddAllocated(strdup(line));
+}
+
+int linenoiseHistoryGetMaxLen(void) {
+ return history_max_len;
+}
+
+int linenoiseHistorySetMaxLen(int len) {
+ char **newHistory;
+
+ if (len < 1) return 0;
+ if (history) {
+ int tocopy = history_len;
+
+ newHistory = (char **)calloc(sizeof(char*), len);
+
+ /* If we can't copy everything, free the elements we'll not use. */
+ if (len < tocopy) {
+ int j;
+
+ for (j = 0; j < tocopy-len; j++) free(history[j]);
+ tocopy = len;
+ }
+ memcpy(newHistory,history+(history_len-tocopy), sizeof(char*)*tocopy);
+ free(history);
+ history = newHistory;
+ }
+ history_max_len = len;
+ if (history_len > history_max_len)
+ history_len = history_max_len;
+ return 1;
+}
+
+/* Save the history in the specified file. On success 0 is returned
+ * otherwise -1 is returned. */
+int linenoiseHistorySave(const char *filename) {
+ FILE *fp = fopen(filename,"w");
+ int j;
+
+ if (fp == NULL) return -1;
+ for (j = 0; j < history_len; j++) {
+ const char *str = history[j];
+ /* Need to encode backslash, nl and cr */
+ while (*str) {
+ if (*str == '\\') {
+ fputs("\\\\", fp);
+ }
+ else if (*str == '\n') {
+ fputs("\\n", fp);
+ }
+ else if (*str == '\r') {
+ fputs("\\r", fp);
+ }
+ else {
+ fputc(*str, fp);
+ }
+ str++;
+ }
+ fputc('\n', fp);
+ }
+
+ fclose(fp);
+ return 0;
+}
+
+/* Load the history from the specified file.
+ *
+ * If the file does not exist or can't be opened, no operation is performed
+ * and -1 is returned.
+ * Otherwise 0 is returned.
+ */
+int linenoiseHistoryLoad(const char *filename) {
+ FILE *fp = fopen(filename,"r");
+ stringbuf *sb;
+
+ if (fp == NULL) return -1;
+
+ while ((sb = sb_getline(fp)) != NULL) {
+ /* Take the stringbuf and decode backslash escaped values */
+ char *buf = sb_to_string(sb);
+ char *dest = buf;
+ const char *src;
+
+ for (src = buf; *src; src++) {
+ char ch = *src;
+
+ if (ch == '\\') {
+ src++;
+ if (*src == 'n') {
+ ch = '\n';
+ }
+ else if (*src == 'r') {
+ ch = '\r';
+ } else {
+ ch = *src;
+ }
+ }
+ *dest++ = ch;
+ }
+ *dest = 0;
+
+ linenoiseHistoryAddAllocated(buf);
+ }
+ fclose(fp);
+ return 0;
+}
+
+/* Provide access to the history buffer.
+ *
+ * If 'len' is not NULL, the length is stored in *len.
+ */
+char **linenoiseHistory(int *len) {
+ if (len) {
+ *len = history_len;
+ }
+ return history;
+}
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-17 07:06:04 +0000