101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
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/* libCStreamedXML/src/libCStreamedXML/buffer.c
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*
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* (c)2006, Laurence Withers. Released under the GNU GPL. See file
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* COPYING for more information / terms of license.
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*/
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static int do_realloc(struct csxml* ctx, struct csxml_buf* buf)
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{
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char* n = realloc(buf->data, buf->size << 1);
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if(!n) {
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ctx->outOfMemory(ctx, buf->size << 1);
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return -1;
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}
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buf->size <<= 1;
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buf->data = n;
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return 0;
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}
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static int buffer_copy(struct csxml* ctx, struct csxml_buf* dest, const struct csxml_buf* src)
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{
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while(dest->size <= src->len) if(do_realloc(ctx, dest)) return -1;
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strcpy(dest->data, src->data);
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dest->len = src->len;
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return 0;
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}
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static int buffer_strcat(struct csxml* ctx, struct csxml_buf* dest, const char* src)
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{
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size_t req = strlen(src) + dest->len;
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while(req >= dest->size) if(do_realloc(ctx, dest)) return -1;
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strcat(dest->data, src);
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return 0;
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}
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static int buffer_init(struct csxml* ctx, struct csxml_buf* buf)
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{
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memset(buf, 0, sizeof(buf));
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buf->size = 256;
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buf->data = malloc(buf->size);
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if(!buf->data) {
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ctx->outOfMemory(ctx, buf->size);
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return -1;
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}
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return 0;
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}
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static void buffer_free(struct csxml_buf* buf)
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{
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free(buf->data);
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memset(buf, 0, sizeof(struct csxml_buf));
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}
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static int do_realloc2(struct csxml* ctx, struct csxml_list* list)
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{
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size_t i, newlen = list->size ? (list->size << 1) : 4;
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struct csxml_buf* n = realloc(list->data, newlen * sizeof(struct csxml_buf));
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if(!n) {
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ctx->outOfMemory(ctx, newlen * sizeof(struct csxml_buf));
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return -1;
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}
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memset(n + list->size * sizeof(struct csxml_buf), 0, newlen * sizeof(struct csxml_buf));
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for(i = 0; i < newlen; ++i) {
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if(buffer_init(ctx, n + list->size + i)) return -1;
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}
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list->size = newlen;
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list->data = n;
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return 0;
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}
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static int list_push(struct csxml* ctx, struct csxml_list* list, struct csxml_buf* buf)
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{
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if((list->size == list->len) && do_realloc2(ctx, list)) return -1;
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if(buffer_copy(ctx, list->data + list->len, buf)) return -1;
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++list->len;
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return 0;
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}
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static struct csxml_buf* list_pop(struct csxml_list* list)
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{
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return list->data + --list->len;
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}
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static void list_free(struct csxml_list* list)
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{
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size_t i;
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for(i = 0; i < list->size; ++i) buffer_free(list->data + i);
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free(list->data);
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memset(list, 0, sizeof(struct csxml_list));
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}
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/* options for text editors
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kate: replace-trailing-space-save true; space-indent true; tab-width 4;
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vim: expandtab:ts=4:sw=4
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*/
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