129 lines
2.4 KiB
C
129 lines
2.4 KiB
C
#include "private.h"
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#include "sb.h"
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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int
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ty_sb_add(struct ty_sb *sb, const char *s, size_t len)
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{
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size_t new_len = sb->len + len;
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if ((new_len + sb->gap >= sb->alloc) || !sb->buf)
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{
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size_t new_alloc = ((new_len + sb->gap + 15) / 16) * 24;
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char *new_buf;
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new_buf = realloc(sb->buf - sb->gap, new_alloc);
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if (new_buf == NULL)
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return -1;
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sb->buf = new_buf + sb->gap;
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sb->alloc = new_alloc;
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}
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memcpy(sb->buf + sb->len, s, len);
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sb->len += len;
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sb->buf[sb->len] = '\0';
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return 0;
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}
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int
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ty_sb_prepend(struct ty_sb *sb, const char *s, size_t len)
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{
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if (len >= sb->gap)
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{
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size_t aligned_gap = ((len + 15) / 16) * 24;
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size_t third_of_alloc = (((sb->alloc / 3) + 15) / 16) * 16;
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size_t new_gap = MAX(aligned_gap, third_of_alloc);
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size_t new_alloc = sb->alloc + new_gap;
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char *new_buf;
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new_buf = calloc(new_alloc, 1);
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if (new_buf == NULL)
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return -1;
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memcpy(new_buf + new_gap, sb->buf, sb->len);
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free(sb->buf - sb->gap);
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sb->buf = new_buf + new_gap;
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sb->gap = new_gap;
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sb->alloc = new_alloc;
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}
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sb->buf -= len;
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sb->gap -= len;
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sb->len += len;
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memcpy(sb->buf, s, len);
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return 0;
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}
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/* unlike eina_strbuf_rtrim, only trims \t, \f, ' ' */
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void
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ty_sb_spaces_rtrim(struct ty_sb *sb)
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{
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if (!sb->buf)
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return;
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while (sb->len > 0)
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{
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char c = sb->buf[sb->len - 1];
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if ((c != ' ') && (c != '\t') && (c != '\f'))
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break;
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sb->len--;
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}
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sb->buf[sb->len] = '\0';
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}
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char *
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ty_sb_steal_buf(struct ty_sb *sb)
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{
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size_t i;
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char *buf;
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if (!sb->len)
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return NULL;
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if (sb->gap != 0)
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{
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sb->buf -= sb->gap;
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for (i = 0; i <= sb->len; i++)
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{
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sb->buf[i] = sb->buf[i + sb->gap];
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}
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sb->gap = 0;
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}
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sb->alloc = 0;
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sb->gap = 0;
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sb->len = 0;
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buf = sb->buf;
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sb->buf = NULL;
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return buf;
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}
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void
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ty_sb_lskip(struct ty_sb *sb, int len)
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{
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sb->len -= len;
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sb->gap += len;
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sb->buf += len;
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}
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void
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ty_sb_rskip(struct ty_sb *sb, int len)
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{
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sb->len -= len;
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sb->buf[sb->len] = '\0';
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}
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void
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ty_sb_free(struct ty_sb *sb)
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{
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free(sb->buf - sb->gap);
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sb->gap = sb->len = sb->alloc = 0;
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sb->buf = NULL;
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}
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