be31d44bd9
It provides a ucode module with similar functionality as libreadline, however with much smaller code and no dependencies aside from ucode and libubox. It also provides shell-style parsing/escaping code useful for building a CLI. Signed-off-by: Felix Fietkau <nbd@nbd.name>
96 lines
1.6 KiB
C
96 lines
1.6 KiB
C
// SPDX-License-Identifier: ISC
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/*
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* Copyright (C) 2025 Felix Fietkau <nbd@nbd.name>
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "uline.h"
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#include "private.h"
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enum vt100_escape vt100_esc_decode(const char *str)
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{
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unsigned long code;
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size_t idx;
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switch (*(str++)) {
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case 0:
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return VT100_INCOMPLETE;
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case '[':
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case 'O':
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switch (*(str++)) {
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case 0:
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return VT100_INCOMPLETE;
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case 'A':
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return VT100_CURSOR_UP;
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case 'B':
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return VT100_CURSOR_DOWN;
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case 'C':
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return VT100_CURSOR_RIGHT;
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case 'D':
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return VT100_CURSOR_LEFT;
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case 'F':
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return VT100_END;
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case 'H':
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return VT100_HOME;
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case '5':
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switch (*str) {
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case 'C':
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return VT100_CURSOR_WORD_RIGHT;
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case 'D':
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return VT100_CURSOR_WORD_LEFT;
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default:
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break;
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}
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/* fallthrough */
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case '0' ... '4':
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case '6' ... '9':
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str--;
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idx = strspn(str, "0123456789");
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if (!str[idx])
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return VT100_INCOMPLETE;
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if (str[idx] != '~')
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return VT100_UNKNOWN;
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code = strtoul(str, NULL, 10);
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switch (code) {
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case 1:
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return VT100_HOME;
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case 3:
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return VT100_DELETE;
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case 4:
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return VT100_END;
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case 200:
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case 201:
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// paste start/end
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return VT100_IGNORE;
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default:
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return VT100_UNKNOWN;
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}
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default:
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return VT100_UNKNOWN;
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}
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default:
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return VT100_UNKNOWN;
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}
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}
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void __vt100_csi_num(FILE *out, int num, char code)
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{
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fprintf(out, "\e[%d%c", num, code);
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}
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void __vt100_esc(FILE *out, char c)
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{
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char seq[] = "\eX";
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seq[1] = c;
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fputs(seq, out);
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}
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void __vt100_csi2(FILE *out, char c1, char c2)
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{
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char seq[] = "\e[XX";
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seq[2] = c1;
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seq[3] = c2;
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fputs(seq, out);
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}
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