iupdate buffer.
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@ -28,6 +28,7 @@ int
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growBuffer(Buffer b, size_t minfree)
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{ size_t osz = b->max - b->base, sz = osz;
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size_t top = b->top - b->base;
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char *new;
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if ( b->max - b->top >= (int)minfree )
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return TRUE;
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@ -37,20 +38,17 @@ growBuffer(Buffer b, size_t minfree)
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while( top + minfree > sz )
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sz *= 2;
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if ( b->base != b->static_buffer )
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{ b->base = realloc(b->base, sz);
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if ( !b->base )
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return FALSE;
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} else /* from static buffer */
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{ char *new;
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if ( !(new = malloc(sz)) )
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if ( b->base == b->static_buffer )
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{ if ( !(new = malloc(sz)) )
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return FALSE;
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memcpy(new, b->static_buffer, osz);
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b->base = new;
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} else
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{ if ( !(new = realloc(b->base, sz)) )
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return FALSE;
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}
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b->base = new;
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b->top = b->base + top;
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b->max = b->base + sz;
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@ -62,7 +60,7 @@ growBuffer(Buffer b, size_t minfree)
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* BUFFER RING *
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*******************************/
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#define discardable_buffer (LD->fli._discardable_buffer)
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#define discardable_buffer (LD->fli._discardable_buffer)
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#define buffer_ring (LD->fli._buffer_ring)
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#define current_buffer_id (LD->fli._current_buffer_id)
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@ -49,7 +49,7 @@ int growBuffer(Buffer b, size_t minfree);
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{ if ( !growBuffer((Buffer)b, sizeof(type)) ) \
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outOfCore(); \
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} \
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*((type *)(b)->top) = obj; \
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*((type *)(b)->top) = obj; \
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(b)->top += sizeof(type); \
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} while(0)
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@ -68,6 +68,24 @@ int growBuffer(Buffer b, size_t minfree);
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(b)->top = (char *)_d; \
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} while(0)
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#define allocFromBuffer(b, bytes) \
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f__allocFromBuffer((Buffer)(b), (bytes))
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static inline void*
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f__allocFromBuffer(Buffer b, size_t bytes)
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{ if ( b->top + bytes <= b->max ||
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growBuffer(b, bytes) )
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{ void *top = b->top;
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b->top += bytes;
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return top;
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}
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return NULL;
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}
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#define baseBuffer(b, type) ((type *) (b)->base)
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#define topBuffer(b, type) ((type *) (b)->top)
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#define inBuffer(b, addr) ((char *) (addr) >= (b)->base && \
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@ -83,6 +101,8 @@ int growBuffer(Buffer b, size_t minfree);
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sizeof((b)->static_buffer))
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#define emptyBuffer(b) ((b)->top = (b)->base)
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#define isEmptyBuffer(b) ((b)->top == (b)->base)
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#define popBuffer(b,type) \
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((b)->top -= sizeof(type), *(type*)(b)->top)
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#define discardBuffer(b) \
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do \
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@ -99,6 +119,6 @@ int growBuffer(Buffer b, size_t minfree);
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COMMON(Buffer) findBuffer(int flags);
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COMMON(int) unfindBuffer(int flags);
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COMMON(char *) buffer_string(const char *s, int flags);
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COMMON(char *) buffer_string(const char *s, int flags);
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#endif /*BUFFER_H_INCLUDED*/
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