Module: Mesa Branch: master Commit: 6cd82eb399c8a6c248c2d9b135bafefbac8fbe0f URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=6cd82eb399c8a6c248c2d9b135bafefbac8fbe0f
Author: Luca Barbieri <[email protected]> Date: Thu Feb 25 13:11:12 2010 +0100 gallium/auxiliary: add dynamically sized buffer/array/vector --- src/gallium/auxiliary/util/u_buffer.h | 57 +++++++++++++++++++++++++++++++++ 1 files changed, 57 insertions(+), 0 deletions(-) diff --git a/src/gallium/auxiliary/util/u_buffer.h b/src/gallium/auxiliary/util/u_buffer.h new file mode 100644 index 0000000..5eb53bc --- /dev/null +++ b/src/gallium/auxiliary/util/u_buffer.h @@ -0,0 +1,57 @@ +#ifndef U_BUFFER_H +#define U_BUFFER_H + +struct util_buffer +{ + void* data; + unsigned size; + unsigned capacity; +}; + +static inline void +util_buffer_init(struct util_buffer* buf) +{ + memset(buf, 0, sizeof(*buf)); +} + +static inline void +util_buffer_fini(struct util_buffer* buf) +{ + if(buf->data) { + free(buf->data); + util_buffer_init(buf); + } +} + +static inline void* +util_buffer_grow(struct util_buffer* buf, int size) +{ + unsigned newsize = buf->size + size; + char* p; + if(newsize > buf->capacity) { + buf->capacity <<= 1; + if(newsize > buf->capacity) + buf->capacity = newsize; + buf->data = realloc(buf->data, buf->capacity); + } + + p = (char*)buf->data + buf->size; + buf->size = newsize; + return p; +} + +static inline void +util_buffer_trim(struct util_buffer* buf) +{ + buf->data = realloc(buf->data, buf->size); + buf->capacity = buf->size; +} + +#define util_buffer_append(buf, type, v) do {type __v = (v); memcpy(util_buffer_grow((buf), sizeof(type)), &__v, sizeof(type));} while(0) +#define util_buffer_top_ptr(buf, type) (type*)((buf)->data + (buf)->size - sizeof(type)) +#define util_buffer_top(buf, type) *util_buffer_top_ptr(buf, type) +#define util_buffer_pop_ptr(buf, type) (type*)((buf)->data + ((buf)->size -= sizeof(type))) +#define util_buffer_pop(buf, type) *util_buffer_pop_ptr(buf, type) +#define util_buffer_contains(buf, type) ((buf)->size >= sizeof(type)) + +#endif /* U_BUFFER_H */ _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
