libbuf (reversal of reversal)
This commit is contained in:
Julian Barathieu
parent
b0c5ef74d2
commit
ff0cb34df0
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@ -61,8 +61,8 @@ extern const char *PsPrioClassesNames[];
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// Re-scheduling and preemption
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// XXX atomic operations
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//
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#define PsRequestReSched() (++KeCurCPU->needReSched)
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#define PsDisablePreemption() (++KeCurCPU->preemptCount)
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#define PsRequestReSched() do { ++KeCurCPU->needReSched; } while (0)
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#define PsDisablePreemption() do { ++KeCurCPU->preemptCount; } while (0)
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#define PsEnablePreemption() do { assert(KeCurCPU->preemptCount > 0); \
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--KeCurCPU->preemptCount; } while(0)
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@ -138,14 +138,18 @@ int BGetState(Buffer_t *);
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error_t BFlushBuf(Buffer_t *);
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error_t BPutOnBuf(Buffer_t *, uchar);
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error_t BWriteOnBuf(Buffer_t *, uchar *, size_t);
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error_t BPrintOnBuf(Buffer_t *, const char *, ...);
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error_t BPrintOnBufV(Buffer_t *, const char *, va_list);
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error_t BGetFromBuf(Buffer_t *, uchar *);
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error_t BReadBuf(Buffer_t *, uchar *, size_t);
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error_t BScanBuf(Buffer_t *, const char *, ...);
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error_t BScanBufV(Buffer_t *, const char *, va_list);
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// The following functions return the number of bytes written to the buffer
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size_t BWriteOnBuf(Buffer_t *, uchar *, size_t);
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size_t BPrintOnBuf(Buffer_t *, const char *, ...);
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size_t BPrintOnBufV(Buffer_t *, const char *, va_list);
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// The following functions return the number of elements from their
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// va_list's their wrote too, e.g. successful bscanf("%d %d", &a, &b) == 2
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size_t BReadFromBuf(Buffer_t *, uchar *, size_t);
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size_t BScanFromBuf(Buffer_t *, const char *, ...);
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size_t BScanFromBufV(Buffer_t *, const char *, va_list);
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void BLockBuf(Buffer_t *);
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void BUnlockBuf(Buffer_t *);
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@ -157,14 +161,14 @@ bool BTrylockBuf(Buffer_t *);
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//
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error_t bputc(Buffer_t *, uchar);
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error_t bwrite(Buffer_t *, uchar *, size_t);
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error_t bprintf(Buffer_t *, const char *, ...);
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error_t vbprintf(Buffer_t *, const char *, va_list);
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size_t bwrite(Buffer_t *, uchar *, size_t);
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size_t bprintf(Buffer_t *, const char *, ...);
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size_t vbprintf(Buffer_t *, const char *, va_list);
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error_t bgetc(Buffer_t *, uchar *);
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error_t bread(Buffer_t *, uchar *, size_t);
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error_t bscanf(Buffer_t *, const char *, ...);
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error_t vbscanf(Buffer_t *, const char *, va_list);
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size_t bread(Buffer_t *, uchar *, size_t);
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size_t bscanf(Buffer_t *, size_t *, const char *, ...);
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size_t vbscanf(Buffer_t *, size_t *, const char *, va_list);
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error_t bemptybuf(Buffer_t *);
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error_t bscrolldown(Buffer_t *);
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@ -26,7 +26,6 @@
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#include <ke/proc.h>
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#include <io/vga.h>
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error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap);
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extern bool KeIdtIsInitialized;
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//
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@ -43,6 +43,9 @@ error_t BGetFromBuf(Buffer_t *buf, uchar *ch)
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ExReleaseLock(&buf->lock);
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return rc;
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}
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// Note: any change to this must be done while
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// keeping in mind vbscanf()'s workaround for ungetc()
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error_t bgetc(Buffer_t *buf, uchar *ch)
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{
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error_t rc = EOK;
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@ -70,6 +73,9 @@ error_t bgetc(Buffer_t *buf, uchar *ch)
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while (buf->rp >= buf->wp) {
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#ifdef _KALEID_KERNEL
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KeSleep(1); // XXX synchronization with keyboard driver
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#else
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buf->flags |= BF_EOF;
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return EENDF; // Currently empty
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#endif
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}
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@ -31,73 +31,41 @@
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//
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// Prints formatted string on buf according to fmt
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//
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error_t BPrintOnBuf(Buffer_t *buf, const char *fmt, ...)
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size_t BPrintOnBuf(Buffer_t *buf, const char *fmt, ...)
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{
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error_t rc;
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size_t sz;
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va_list ap;
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va_start(ap, fmt);
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ExAcquireLock(&buf->lock);
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rc = vbprintf(buf, fmt, ap);
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sz = vbprintf(buf, fmt, ap);
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ExReleaseLock(&buf->lock);
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va_end(ap);
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return rc;
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return sz;
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}
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error_t BPrintOnBufV(Buffer_t *buf, const char *fmt, va_list ap)
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size_t BPrintOnBufV(Buffer_t *buf, const char *fmt, va_list ap)
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{
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error_t rc;
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size_t sz;
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ExAcquireLock(&buf->lock);
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rc = vbprintf(buf, fmt, ap);
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sz = vbprintf(buf, fmt, ap);
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ExReleaseLock(&buf->lock);
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return rc;
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return sz;
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}
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error_t bprintf(Buffer_t *buf, const char *fmt, ...)
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size_t bprintf(Buffer_t *buf, const char *fmt, ...)
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{
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error_t rc;
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error_t sz;
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va_list ap;
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va_start(ap, fmt);
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rc = vbprintf(buf, fmt, ap);
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sz = vbprintf(buf, fmt, ap);
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va_end(ap);
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return rc;
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}
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//
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// Prints 0 for octal, 0x for hexadecimal, 0b for binary
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//
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static error_t bprinthash(Buffer_t *buf, int base, int cap)
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{
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error_t rc;
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if (base != 2 && base != 8 && base != 16) {
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return EOK;
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}
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rc = bputc(buf, '0');
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if (!rc && base != 8) {
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rc = bputc(buf, (base == 2 ? 'b' : (cap ? 'X' : 'x')));
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}
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return rc;
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}
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static error_t bdopadding(Buffer_t *buf, size_t width, size_t len,
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char filler)
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{
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error_t rc = EOK;
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for (; !rc && width > len ; width--) {
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rc = bputc(buf, filler);
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}
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return rc;
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return sz;
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}
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#define CONVBUFSIZE 100
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@ -106,9 +74,10 @@ static error_t bdopadding(Buffer_t *buf, size_t width, size_t len,
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// Actually does BPrintOnBuf's job; doesn't lock anything
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// Quite a long function
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//
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error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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size_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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{
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error_t rc = 0;
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size_t written = 0;
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ssize_t width, prec, len;
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char type;
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@ -134,10 +103,11 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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// Base
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int base;
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if (!buf || !fmt) return EINVAL;
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if (buf->flags & (BF_EOF|BF_ERR)) return EENDF;
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if (!buf || !fmt) { seterrno(EINVAL); return 0; }
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if (buf->flags & (BF_EOF|BF_ERR)) { seterrno(EENDF); return 0; }
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if (buf->state != BS_RDWR && buf->state != BS_WRONLY) {
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return EBADF;
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seterrno(EBADF);
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return 0;
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}
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// Progress in format string
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@ -146,14 +116,12 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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// Deal with all non-'%' characters
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if (*fmt != '%') {
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rc = bputc(buf, *fmt);
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fmt++;
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written++, fmt++;
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continue;
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}
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//
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// %[parameter][flags][width|*][.precision|*][length]type
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// We aren't dealing with parameters and floating stuff just yet
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// %[flags][width|*][.precision|*][length]type
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//
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// Skip the '%'
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@ -162,8 +130,7 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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// "%%" modifier
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if (*fmt == '%') {
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rc = bputc(buf, '%');
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fmt++;
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written++, fmt++;
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continue;
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}
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@ -253,6 +220,7 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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if (type == 'c') {
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uch = (uchar)va_arg(ap, int);
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rc = bputc(buf, uch);
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written++;
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continue;
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}
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@ -261,11 +229,11 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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if (type == 'C') {
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base = va_arg(ap, int);
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if (!(base < 0 || base > VGA_COLOR_WHITE))
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if (!(base < 0 || base > VGA_COLOR_WHITE)) {
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rc = bputc(buf, RtlColorToChar(base));
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written++;
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}
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assert(!rc && 1);
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continue;
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}
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#endif
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@ -281,8 +249,9 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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// Zero/nonspecified precision means unlimited amount
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if (prec == 0) prec = INT_MAX;
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for (; *s && prec-- ; s++) {
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for (; !rc && *s && prec-- ; s++) {
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rc = bputc(buf, (uchar)*s);
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written++;
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}
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continue;
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@ -292,6 +261,7 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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// Make sure width and prec aren't too big
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// (We didn't do that earlier because %s uses width)
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if (width > CONVBUFSIZE || prec > CONVBUFSIZE) {
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written++; // Work around "if (rc) return written - 1;"
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rc = EINVAL;
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break;
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}
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@ -314,15 +284,15 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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// End of string too soon
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else if (type == '\0') {
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bputc(buf, '%');
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written++; // Work around "if (rc) return written - 1;"
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rc = EINVAL;
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break;
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}
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// Unknown/unsupported modifier
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else {
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bputc(buf, '%');
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bputc(buf, '?');
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rc = bputc(buf, type);
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rc = bputc(buf, '%');
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written++;
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continue;
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}
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@ -382,36 +352,62 @@ error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
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}
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// When padding with spaces, we pad before +/-'s etc
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if (!minus && !zero && width > len)
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bdopadding(buf, width, len, ' ');
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if (!minus && !zero && width > len) {
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for (; !rc && width > len ; width--) {
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rc = bputc(buf, ' ');
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written++;
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}
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}
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// Deal with signs and the hash flag
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if (*s == '-') { rc = bputc(buf, '-'); s++, len--; }
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else if (sgn && plus) rc = bputc(buf, '+');
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else if (sgn && space) rc = bputc(buf, ' ');
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else if (hash) bprinthash(buf, base, cap);
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if (*s == '-') { rc = bputc(buf, '-'); s++, len--; written++; }
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else if (sgn && plus) { rc = bputc(buf, '+'); written++; }
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else if (sgn && space) { rc = bputc(buf, ' '); written++; }
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// Print 0 for octal, 0x for hexadecimal, 0b for binary
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else if (hash && (base == 2 || base == 8 || base == 16)) {
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rc = bputc(buf, '0');
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written++;
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if (!rc && base != 8) {
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rc = bputc(buf, (base == 2 ? 'b' : (cap ? 'X' : 'x')));
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written++;
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}
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}
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// Deal with padding by zeroes
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// The 'minus' flag makes no sense with the 'zero' one
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if (zero && width > len)
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bdopadding(buf, width, len, '0');
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if (zero && width > len) {
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for (; !rc && width > len ; width--) {
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rc = bputc(buf, '0');
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written++;
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}
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}
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// Output the actual number
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for (; !rc && *s ; s++) {
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rc = bputc(buf, (uchar)*s);
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written++;
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}
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// 'minus' padding, only with spaces
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if (minus && !zero && width > len)
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bdopadding(buf, width, base, ' ');
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if (minus && !zero && width > len) {
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for (; !rc && width > len ; width--) {
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rc = bputc(buf, ' ');
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written++;
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}
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}
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// Carry on to next modifier
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}
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// For debugging purposes
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if(rc)KeStartPanic("%s",strerror(rc));
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assert(!rc && "vbprintf() error");
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seterrno(rc);
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return rc;
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if (rc)
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return written - 1; // "- 1" because last bputc() must have failed
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else
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return written;
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}
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@ -22,5 +22,190 @@
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#if 0
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#include <lib/buf.h>
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//
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// Builds string reading from buf according to fmt
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//
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size_t BScanFromBuf(Buffer_t *buf, const char *fmt, ...)
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{
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size_t sz;
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va_list ap;
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va_start(ap, fmt);
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ExAcquireLock(&buf->lock);
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sz = vbscanf(buf, fmt, ap);
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ExReleaseLock(&buf->lock);
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va_end(ap);
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return sz;
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}
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size_t BScanFromBufV(Buffer_t *buf, const char *fmt, va_list ap)
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{
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size_t rc;
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ExAcquireLock(&buf->lock);
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sz = vbscanf(buf, fmt, ap);
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ExReleaseLock(&buf->lock);
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return sz;
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}
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size_t bscanf(Buffer_t *buf, const char *fmt, ...)
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{
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size_t sz;
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va_list ap;
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va_start(ap, fmt);
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sz = vbscanf(buf, fmt, ap);
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va_end(ap);
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return sz;
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}
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size_t vbscanf(Buffer_t *buf, const char *fmt, va_list ap)
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{
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error_t rc = EOK;
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size_t readcnt = 0;
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uchar ch = 0;
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bool l, h;
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size_t width;
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bool ignore; // '*' modifier, don't write to va_list for current mod
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if (!buf || !fmt) { seterrnp(EINVAL); return 0; }
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if (buf->flags & (BF_EOF|BF_ERR)) { seterrno(EENDF); return 0; }
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if (buf->state != BS_RDWR && buf->state != BS_WRONLY) {
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seterrno(EBADF);
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return 0;
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}
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// Progress in format string
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for (*fmt && !rc) {
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// Skip all kinds of whitespaces
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if (isspace(*fmt)) {
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another_space:
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rc = bgetc(buf, &ch);
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if (!rc) break;
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// Put back non-whitespaces and progress
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if (!isspace(ch)) {
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buf->rp--;
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do { fmt++; } while (isspace(*fmt));
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continue;
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}
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else goto another_space;
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}
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// Deal with all non-'%' non-whitespace characters
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if (*fmt != '%') {
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rc = bgetc(buf, &ch);
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// Is it what we expected?
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if (!rc && ch != *fmt) {
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// No, so put it back
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buf->rp--;
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break;
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}
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// We don't do anything with these characters
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continue;
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}
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//
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// %[*][width][modifier]type
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//
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// Skip the %
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fmt++;
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// '%%' type
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if (*fmt == '%') {
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rc = bgetc(buf, &ch);
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if (!rc && ch != '%') {
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buf->rp--;
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break;
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}
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continue;
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}
|
||||
|
||||
l = h = 0;
|
||||
width = 0;
|
||||
ignore = 0;
|
||||
|
||||
// Don't write to variable
|
||||
if (*fmt == '*') {
|
||||
ignore = 1;
|
||||
fmt++;
|
||||
}
|
||||
|
||||
// Extract width field
|
||||
while (isdigit(*fmt)) {
|
||||
width = 10 * width + (*fmt - '0');
|
||||
fmt++;
|
||||
}
|
||||
|
||||
assert(!(width < 0));
|
||||
|
||||
//
|
||||
// Extract length field
|
||||
//
|
||||
|
||||
if (*fmt == 'l') {
|
||||
l = 1;
|
||||
fmt++;
|
||||
}
|
||||
|
||||
else if (*fmt == 'h') {
|
||||
h = 1;
|
||||
fmt++
|
||||
}
|
||||
|
||||
//
|
||||
// Types
|
||||
//
|
||||
|
||||
// Read character(s)
|
||||
if (*fmt == 'c') {
|
||||
if (width == 0) width = 1;
|
||||
|
||||
// For >1 width, read that many characters
|
||||
// then store them in successive argument pointers
|
||||
for (; width; width--) {
|
||||
rc = bgetc(buf, &ch);
|
||||
if (!rc) break;
|
||||
|
||||
char *chptr = va_arg(ap, char *);
|
||||
*chptr = (char)ch;
|
||||
readcnt++;
|
||||
}
|
||||
}
|
||||
|
||||
// Decimal integer
|
||||
else if (*fmt == 'd') {
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
// For debugging purposes
|
||||
assert(!rc && "vbscanf() error");
|
||||
seterrno(rc);
|
||||
|
||||
return readcnt;
|
||||
}
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -35,14 +35,14 @@
|
|||
// Once libbuf is supports dynamic buffers, the only changes necessary
|
||||
// will be to change the value below to and add a line to vsnprintf()
|
||||
//
|
||||
#define VSNPRINTF_MAX 512
|
||||
#define VSNPRINTF_MAX 4096
|
||||
|
||||
//
|
||||
// Format str according to fmt using ellipsed arguments
|
||||
//
|
||||
size_t sprintf(char *str, const char *fmt, ...)
|
||||
{
|
||||
int ret;
|
||||
size_t ret;
|
||||
va_list ap;
|
||||
|
||||
assert(!"sprintf() is deprecated, used snprintf() for more safety");
|
||||
|
|
@ -65,7 +65,7 @@ size_t vsprintf(char *str, const char *fmt, va_list ap)
|
|||
//
|
||||
size_t snprintf(char *str, size_t n, const char *fmt, ...)
|
||||
{
|
||||
int ret;
|
||||
size_t ret;
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
|
|
@ -77,8 +77,8 @@ size_t snprintf(char *str, size_t n, const char *fmt, ...)
|
|||
|
||||
size_t vsnprintf(char *str, size_t n, const char *fmt, va_list ap)
|
||||
{
|
||||
size_t ret;
|
||||
error_t rc = EOK;
|
||||
error_t rc;
|
||||
size_t ret, sz;
|
||||
Buffer_t *buf = NULL;
|
||||
|
||||
assert(str && fmt);
|
||||
|
|
@ -96,26 +96,16 @@ size_t vsnprintf(char *str, size_t n, const char *fmt, va_list ap)
|
|||
goto fail;
|
||||
}
|
||||
|
||||
rc = vbprintf(buf, fmt, ap);
|
||||
sz = vbprintf(buf, fmt, ap);
|
||||
|
||||
// We don't mind EOFs, just just return how much was successfully written
|
||||
if (rc != EOK) {
|
||||
if (rc == EENDF) {
|
||||
if (!(buf->flags & BF_EOF)) {
|
||||
if (sz == 0 && !(buf->flags & BF_EOF))
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
else {
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
ret = (size_t)buf->wp - (size_t)buf->buf;
|
||||
|
||||
if (ret > 0) {
|
||||
// To be changed to memcpy()
|
||||
if (ret > 0)
|
||||
memmove(str, (char *)buf->buf, ret);
|
||||
}
|
||||
|
||||
str[ret++] = 0;
|
||||
assert(ret <= n);
|
||||
|
|
|
|||
Loading…
Reference in New Issue