diff options
Diffstat (limited to 'thirdparty/stb/deprecated/stretchy_buffer.txt')
| -rw-r--r-- | thirdparty/stb/deprecated/stretchy_buffer.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/thirdparty/stb/deprecated/stretchy_buffer.txt b/thirdparty/stb/deprecated/stretchy_buffer.txt new file mode 100644 index 0000000..dcd747e --- /dev/null +++ b/thirdparty/stb/deprecated/stretchy_buffer.txt @@ -0,0 +1,28 @@ +// stretchy buffer // init: NULL // free: sbfree() // push_back: sbpush() // size: sbcount() // +#define sbfree(a) ((a) ? free(stb__sbraw(a)),0 : 0) +#define sbpush(a,v) (stb__sbmaybegrow(a,1), (a)[stb__sbn(a)++] = (v)) +#define sbcount(a) ((a) ? stb__sbn(a) : 0) +#define sbadd(a,n) (stb__sbmaybegrow(a,n), stb__sbn(a)+=(n), &(a)[stb__sbn(a)-(n)]) +#define sblast(a) ((a)[stb__sbn(a)-1]) + +#include <stdlib.h> +#define stb__sbraw(a) ((int *) (a) - 2) +#define stb__sbm(a) stb__sbraw(a)[0] +#define stb__sbn(a) stb__sbraw(a)[1] + +#define stb__sbneedgrow(a,n) ((a)==0 || stb__sbn(a)+n >= stb__sbm(a)) +#define stb__sbmaybegrow(a,n) (stb__sbneedgrow(a,(n)) ? stb__sbgrow(a,n) : 0) +#define stb__sbgrow(a,n) stb__sbgrowf((void **) &(a), (n), sizeof(*(a))) + +static void stb__sbgrowf(void **arr, int increment, int itemsize) +{ + int m = *arr ? 2*stb__sbm(*arr)+increment : increment+1; + void *p = realloc(*arr ? stb__sbraw(*arr) : 0, itemsize * m + sizeof(int)*2); + assert(p); + if (p) { + if (!*arr) ((int *) p)[1] = 0; + *arr = (void *) ((int *) p + 2); + stb__sbm(*arr) = m; + } +} + |