diff options
Diffstat (limited to 'Minecraft.Server/vendor/linenoise/linenoise.c')
| -rw-r--r-- | Minecraft.Server/vendor/linenoise/linenoise.c | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/Minecraft.Server/vendor/linenoise/linenoise.c b/Minecraft.Server/vendor/linenoise/linenoise.c new file mode 100644 index 00000000..a5b8ac5f --- /dev/null +++ b/Minecraft.Server/vendor/linenoise/linenoise.c @@ -0,0 +1,649 @@ +#include "linenoise.h" + +#include <conio.h> +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <windows.h> + +#define LINENOISE_MAX_LINE 4096 +#define LINENOISE_MAX_PROMPT 128 + +typedef struct linenoiseHistory { + char **items; + int len; + int cap; + int maxLen; +} linenoiseHistory; + +static linenoiseCompletionCallback *g_completionCallback = NULL; +static volatile LONG g_stopRequested = 0; +static linenoiseHistory g_history = { NULL, 0, 0, 128 }; +/* Guards redraw/log interleaving so prompt and log lines do not overlap. */ +static CRITICAL_SECTION g_ioLock; +static volatile LONG g_ioLockState = 0; /* 0=not init, 1=init in progress, 2=ready */ +/* Snapshot of current editor line used to restore prompt after external output. */ +static volatile LONG g_editorActive = 0; +static char g_editorPrompt[LINENOISE_MAX_PROMPT] = { 0 }; +static char g_editorBuf[LINENOISE_MAX_LINE] = { 0 }; +static int g_editorLen = 0; +static int g_editorPos = 0; +static int g_editorPrevLen = 0; + +/** + * Lazily initialize the console I/O critical section. + * This avoids static init order issues and keeps startup cost minimal. + */ +static void linenoiseEnsureIoLockInit(void) +{ + LONG state = InterlockedCompareExchange(&g_ioLockState, 0, 0); + if (state == 2) + return; + + if (state == 0 && InterlockedCompareExchange(&g_ioLockState, 1, 0) == 0) + { + InitializeCriticalSection(&g_ioLock); + InterlockedExchange(&g_ioLockState, 2); + return; + } + + while (InterlockedCompareExchange(&g_ioLockState, 0, 0) != 2) + { + Sleep(0); + } +} + +static void linenoiseLockIo(void) +{ + linenoiseEnsureIoLockInit(); + EnterCriticalSection(&g_ioLock); +} + +static void linenoiseUnlockIo(void) +{ + LeaveCriticalSection(&g_ioLock); +} + +/** + * Save current prompt/buffer/cursor state for later redraw. + * Called after each redraw while editor is active. + */ +static void linenoiseUpdateEditorState(const char *prompt, const char *buf, int len, int pos, int prevLen) +{ + if (prompt == NULL) + prompt = ""; + if (buf == NULL) + buf = ""; + + strncpy_s(g_editorPrompt, sizeof(g_editorPrompt), prompt, _TRUNCATE); + strncpy_s(g_editorBuf, sizeof(g_editorBuf), buf, _TRUNCATE); + g_editorLen = len; + g_editorPos = pos; + g_editorPrevLen = prevLen; + InterlockedExchange(&g_editorActive, 1); +} + +static void linenoiseDeactivateEditorState(void) +{ + InterlockedExchange(&g_editorActive, 0); + g_editorPrompt[0] = 0; + g_editorBuf[0] = 0; + g_editorLen = 0; + g_editorPos = 0; + g_editorPrevLen = 0; +} + +static char *linenoiseStrdup(const char *src) +{ + size_t n = strlen(src) + 1; + char *out = (char *)malloc(n); + if (out == NULL) + return NULL; + memcpy(out, src, n); + return out; +} + +static void linenoiseEnsureHistoryCapacity(int wanted) +{ + if (wanted <= g_history.cap) + return; + + int newCap = g_history.cap == 0 ? 32 : g_history.cap; + while (newCap < wanted) + newCap *= 2; + + char **newItems = (char **)realloc(g_history.items, sizeof(char *) * (size_t)newCap); + if (newItems == NULL) + return; + + g_history.items = newItems; + g_history.cap = newCap; +} + +static void linenoiseClearCompletions(linenoiseCompletions *lc) +{ + size_t i = 0; + for (i = 0; i < lc->len; ++i) + { + free(lc->cvec[i]); + } + free(lc->cvec); + lc->cvec = NULL; + lc->len = 0; +} + +void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) +{ + char **newVec = (char **)realloc(lc->cvec, sizeof(char *) * (lc->len + 1)); + if (newVec == NULL) + return; + + lc->cvec = newVec; + lc->cvec[lc->len] = linenoiseStrdup(str); + if (lc->cvec[lc->len] == NULL) + return; + + lc->len += 1; +} + +void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) +{ + g_completionCallback = fn; +} + +void linenoiseFree(void *ptr) +{ + free(ptr); +} + +int linenoiseHistorySetMaxLen(int len) +{ + if (len <= 0) + return 0; + + g_history.maxLen = len; + while (g_history.len > g_history.maxLen) + { + free(g_history.items[0]); + memmove(g_history.items, g_history.items + 1, sizeof(char *) * (size_t)(g_history.len - 1)); + g_history.len -= 1; + } + + return 1; +} + +int linenoiseHistoryAdd(const char *line) +{ + if (line == NULL || line[0] == 0) + return 0; + + if (g_history.len > 0) + { + const char *last = g_history.items[g_history.len - 1]; + if (last != NULL && strcmp(last, line) == 0) + return 1; + } + + linenoiseEnsureHistoryCapacity(g_history.len + 1); + if (g_history.cap <= g_history.len) + return 0; + + g_history.items[g_history.len] = linenoiseStrdup(line); + if (g_history.items[g_history.len] == NULL) + return 0; + + g_history.len += 1; + + while (g_history.len > g_history.maxLen) + { + free(g_history.items[0]); + memmove(g_history.items, g_history.items + 1, sizeof(char *) * (size_t)(g_history.len - 1)); + g_history.len -= 1; + } + + return 1; +} + +void linenoiseRequestStop(void) +{ + InterlockedExchange(&g_stopRequested, 1); +} + +void linenoiseResetStop(void) +{ + InterlockedExchange(&g_stopRequested, 0); +} + +static int linenoiseIsStopRequested(void) +{ + return InterlockedCompareExchange(&g_stopRequested, 0, 0) != 0; +} + +static void linenoiseWriteHint(const char *hint, size_t hintLen) +{ + HANDLE stdoutHandle; + CONSOLE_SCREEN_BUFFER_INFO originalInfo; + int hasColorConsole = 0; + + if (hint == NULL || hintLen == 0) + { + return; + } + + stdoutHandle = GetStdHandle(STD_OUTPUT_HANDLE); + if (stdoutHandle != INVALID_HANDLE_VALUE && stdoutHandle != NULL) + { + if (GetConsoleScreenBufferInfo(stdoutHandle, &originalInfo)) + { + hasColorConsole = 1; + /* Draw predictive tail in dim gray, then restore original console colors. */ + SetConsoleTextAttribute(stdoutHandle, FOREGROUND_INTENSITY); + } + } + + fwrite(hint, 1, hintLen, stdout); + + if (hasColorConsole) + { + SetConsoleTextAttribute(stdoutHandle, originalInfo.wAttributes); + } +} + +static int linenoiseStartsWithIgnoreCase(const char *full, const char *prefix) +{ + while (*prefix != 0) + { + if (tolower((unsigned char)*full) != tolower((unsigned char)*prefix)) + { + return 0; + } + ++full; + ++prefix; + } + return 1; +} + +static size_t linenoiseBuildHint(const char *buf, char *hint, size_t hintSize) +{ + linenoiseCompletions lc; + size_t inputLen = 0; + size_t i = 0; + + if (hint == NULL || hintSize == 0) + { + return 0; + } + hint[0] = 0; + + if (buf == NULL || buf[0] == 0 || g_completionCallback == NULL) + { + return 0; + } + + lc.len = 0; + lc.cvec = NULL; + /* Reuse the completion callback and derive a "ghost text" suffix from the first extending match. */ + g_completionCallback(buf, &lc); + + inputLen = strlen(buf); + for (i = 0; i < lc.len; ++i) + { + const char *candidate = lc.cvec[i]; + if (candidate == NULL) + { + continue; + } + if (strlen(candidate) <= inputLen) + { + continue; + } + if (!linenoiseStartsWithIgnoreCase(candidate, buf)) + { + continue; + } + + /* Keep only the part not yet typed by the user (rendered as hint text). */ + strncpy_s(hint, hintSize, candidate + inputLen, _TRUNCATE); + break; + } + + linenoiseClearCompletions(&lc); + return strlen(hint); +} + +static void linenoiseRedrawUnsafe(const char *prompt, const char *buf, int len, int pos, int *prevLen) +{ + int i; + char hint[LINENOISE_MAX_LINE] = {0}; + int renderedLen = len; + /* Hint length contributes to the rendered width so stale tail characters can be cleared correctly. */ + int hintLen = (int)linenoiseBuildHint(buf, hint, sizeof(hint)); + if (hintLen > 0) + { + renderedLen += hintLen; + } + + fputc('\r', stdout); + fputs(prompt, stdout); + if (len > 0) + { + fwrite(buf, 1, (size_t)len, stdout); + } + if (hintLen > 0) + { + linenoiseWriteHint(hint, (size_t)hintLen); + } + + if (*prevLen > renderedLen) + { + for (i = renderedLen; i < *prevLen; ++i) + { + fputc(' ', stdout); + } + } + + fputc('\r', stdout); + fputs(prompt, stdout); + if (pos > 0) + { + /* Cursor positioning reflects only real user input, not the ghost hint suffix. */ + fwrite(buf, 1, (size_t)pos, stdout); + } + + fflush(stdout); + *prevLen = renderedLen; + linenoiseUpdateEditorState(prompt, buf, len, pos, *prevLen); +} + +static void linenoiseRedraw(const char *prompt, const char *buf, int len, int pos, int *prevLen) +{ + linenoiseLockIo(); + linenoiseRedrawUnsafe(prompt, buf, len, pos, prevLen); + linenoiseUnlockIo(); +} + +static int linenoiseStartsWith(const char *full, const char *prefix) +{ + while (*prefix != 0) + { + if (*full != *prefix) + return 0; + ++full; + ++prefix; + } + return 1; +} + +static int linenoiseComputeCommonPrefix(const linenoiseCompletions *lc, const char *seed, char *out, size_t outSize) +{ + size_t commonLen = 0; + size_t i; + + if (lc->len == 0 || outSize == 0) + return 0; + + strncpy_s(out, outSize, lc->cvec[0], _TRUNCATE); + commonLen = strlen(out); + + for (i = 1; i < lc->len; ++i) + { + const char *candidate = lc->cvec[i]; + size_t j = 0; + + while (j < commonLen && out[j] != 0 && candidate[j] != 0 && out[j] == candidate[j]) + ++j; + + commonLen = j; + out[commonLen] = 0; + + if (commonLen == 0) + break; + } + + if (strlen(out) <= strlen(seed)) + return 0; + + return linenoiseStartsWith(out, seed); +} + +static void linenoiseApplyCompletion(const char *prompt, char *buf, int *len, int *pos, int *prevLen) +{ + linenoiseCompletions lc; + int i; + + if (g_completionCallback == NULL) + { + Beep(750, 15); + return; + } + + lc.len = 0; + lc.cvec = NULL; + g_completionCallback(buf, &lc); + + if (lc.len == 0) + { + Beep(750, 15); + linenoiseClearCompletions(&lc); + return; + } + + if (lc.len == 1) + { + strncpy_s(buf, LINENOISE_MAX_LINE, lc.cvec[0], _TRUNCATE); + *len = (int)strlen(buf); + *pos = *len; + linenoiseRedraw(prompt, buf, *len, *pos, prevLen); + linenoiseClearCompletions(&lc); + return; + } + + { + char common[LINENOISE_MAX_LINE] = { 0 }; + if (linenoiseComputeCommonPrefix(&lc, buf, common, sizeof(common))) + { + strncpy_s(buf, LINENOISE_MAX_LINE, common, _TRUNCATE); + *len = (int)strlen(buf); + *pos = *len; + linenoiseRedraw(prompt, buf, *len, *pos, prevLen); + } + } + + linenoiseLockIo(); + fputc('\n', stdout); + for (i = 0; i < (int)lc.len; ++i) + { + fputs(lc.cvec[i], stdout); + fputs(" ", stdout); + } + fputc('\n', stdout); + linenoiseRedrawUnsafe(prompt, buf, *len, *pos, prevLen); + linenoiseUnlockIo(); + linenoiseClearCompletions(&lc); +} + +char *linenoise(const char *prompt) +{ + char buf[LINENOISE_MAX_LINE]; + int len = 0; + int pos = 0; + int prevLen = 0; + int historyIndex = g_history.len; + + if (prompt == NULL) + prompt = ""; + + buf[0] = 0; + linenoiseLockIo(); + linenoiseUpdateEditorState(prompt, buf, len, pos, prevLen); + fputs(prompt, stdout); + fflush(stdout); + linenoiseUnlockIo(); + + while (!linenoiseIsStopRequested()) + { + if (!_kbhit()) + { + Sleep(10); + continue; + } + + { + int c = _getwch(); + + if (c == 0 || c == 224) + { + int ext = _getwch(); + if (ext == 72) + { + if (g_history.len > 0 && historyIndex > 0) + { + historyIndex -= 1; + strncpy_s(buf, sizeof(buf), g_history.items[historyIndex], _TRUNCATE); + len = (int)strlen(buf); + pos = len; + linenoiseRedraw(prompt, buf, len, pos, &prevLen); + } + } + else if (ext == 80) + { + if (g_history.len > 0 && historyIndex < g_history.len) + { + historyIndex += 1; + if (historyIndex == g_history.len) + buf[0] = 0; + else + strncpy_s(buf, sizeof(buf), g_history.items[historyIndex], _TRUNCATE); + + len = (int)strlen(buf); + pos = len; + linenoiseRedraw(prompt, buf, len, pos, &prevLen); + } + } + else if (ext == 75) + { + if (pos > 0) + { + pos -= 1; + linenoiseRedraw(prompt, buf, len, pos, &prevLen); + } + } + else if (ext == 77) + { + if (pos < len) + { + pos += 1; + linenoiseRedraw(prompt, buf, len, pos, &prevLen); + } + } + continue; + } + + if (c == 3) + { + linenoiseLockIo(); + linenoiseDeactivateEditorState(); + fputc('\n', stdout); + fflush(stdout); + linenoiseUnlockIo(); + return NULL; + } + + if (c == '\r' || c == '\n') + { + char *out; + linenoiseLockIo(); + linenoiseDeactivateEditorState(); + fputc('\n', stdout); + fflush(stdout); + linenoiseUnlockIo(); + + out = linenoiseStrdup(buf); + return out; + } + + if (c == '\t') + { + linenoiseApplyCompletion(prompt, buf, &len, &pos, &prevLen); + continue; + } + + if (c == 8) + { + if (pos > 0 && len > 0) + { + memmove(buf + pos - 1, buf + pos, (size_t)(len - pos + 1)); + pos -= 1; + len -= 1; + linenoiseRedraw(prompt, buf, len, pos, &prevLen); + } + continue; + } + + if (isprint((unsigned char)c) && len < LINENOISE_MAX_LINE - 1) + { + if (pos == len) + { + buf[pos++] = (char)c; + len += 1; + buf[len] = 0; + } + else + { + memmove(buf + pos + 1, buf + pos, (size_t)(len - pos + 1)); + buf[pos] = (char)c; + pos += 1; + len += 1; + } + linenoiseRedraw(prompt, buf, len, pos, &prevLen); + } + } + } + + linenoiseLockIo(); + linenoiseDeactivateEditorState(); + fputc('\n', stdout); + fflush(stdout); + linenoiseUnlockIo(); + return NULL; +} + +void linenoiseExternalWriteBegin(void) +{ + int i; + int totalChars = 0; + + /* Lock shared console state and clear current prompt area before external output. */ + linenoiseLockIo(); + if (InterlockedCompareExchange(&g_editorActive, 0, 0) == 0) + { + return; + } + + totalChars = (int)strlen(g_editorPrompt) + g_editorPrevLen; + if (totalChars < 0) + { + totalChars = 0; + } + + fputc('\r', stdout); + for (i = 0; i < totalChars; ++i) + { + fputc(' ', stdout); + } + fputc('\r', stdout); + fflush(stdout); +} + +void linenoiseExternalWriteEnd(void) +{ + /* Restore prompt line after external output has been printed. */ + if (InterlockedCompareExchange(&g_editorActive, 0, 0) != 0) + { + int prevLen = g_editorPrevLen; + linenoiseRedrawUnsafe(g_editorPrompt, g_editorBuf, g_editorLen, g_editorPos, &prevLen); + g_editorPrevLen = prevLen; + } + linenoiseUnlockIo(); +} |