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add buffer yanking, clean up input functions

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This commit is contained in:
Jfreegman
2014-07-14 14:32:38 -04:00
parent 190e1e73e8
commit b23ae5a4c3
9 changed files with 150 additions and 124 deletions
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75
src/toxic_strings.c
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@ -29,59 +29,98 @@
#include "misc_tools.h"
#include "toxic_strings.h"
/* Adds char to line at pos */
void add_char_to_buf(ChatContext *ctx, wint_t ch)
/* Adds char to line at pos. Return 0 on success, -1 if line buffer is full */
int add_char_to_buf(ChatContext *ctx, wint_t ch)
{
if (ctx->len >= MAX_STR_SIZE)
return;
if (ctx->len >= MAX_STR_SIZE - 1)
return -1;
wmemmove(&ctx->line[ctx->pos + 1], &ctx->line[ctx->pos], ctx->len - ctx->pos);
ctx->line[ctx->pos++] = ch;
ctx->line[++ctx->len] = L'\0';
return 0;
}
/* Deletes the character before pos */
void del_char_buf_bck(ChatContext *ctx)
/* Deletes the character before pos. Return 0 on success, -1 if nothing to delete */
int del_char_buf_bck(ChatContext *ctx)
{
if (ctx->pos == 0)
return;
if (ctx->pos <= 0)
return -1;
wmemmove(&ctx->line[ctx->pos - 1], &ctx->line[ctx->pos], ctx->len - ctx->pos);
--ctx->pos;
ctx->line[--ctx->len] = L'\0';
return 0;
}
/* Deletes the character at pos */
void del_char_buf_frnt(ChatContext *ctx)
/* Deletes the character at pos. Return 0 on success, -1 if nothing to delete. */
int del_char_buf_frnt(ChatContext *ctx)
{
if (ctx->pos >= ctx->len)
return;
return -1;
wmemmove(&ctx->line[ctx->pos], &ctx->line[ctx->pos + 1], ctx->len - ctx->pos - 1);
ctx->line[--ctx->len] = L'\0';
return 0;
}
/* Deletes the line from beginning to pos */
void discard_buf(ChatContext *ctx)
/* Deletes the line from beginning to pos and puts discarded portion in yank buffer.
Return 0 on success, -1 if noting to discard. */
int discard_buf(ChatContext *ctx)
{
if (ctx->pos <= 0)
return;
return -1;
ctx->yank_len = ctx->pos;
wmemcpy(ctx->yank, ctx->line, ctx->yank_len);
ctx->yank[ctx->yank_len] = L'\0';
wmemmove(ctx->line, &ctx->line[ctx->pos], ctx->len - ctx->pos);
ctx->len -= ctx->pos;
ctx->pos = 0;
ctx->start = 0;
ctx->line[ctx->len] = L'\0';
return 0;
}
/* Deletes the line from pos to len */
void kill_buf(ChatContext *ctx)
/* Deletes the line from pos to len and puts killed portion in yank buffer.
Return 0 on success, -1 if nothing to kill. */
int kill_buf(ChatContext *ctx)
{
if (ctx->len == ctx->pos)
return;
if (ctx->len <= ctx->pos)
return -1;
ctx->yank_len = ctx->len - ctx->pos;
wmemcpy(ctx->yank, &ctx->line[ctx->pos], ctx->yank_len);
ctx->yank[ctx->yank_len] = L'\0';
ctx->line[ctx->pos] = L'\0';
ctx->len = ctx->pos;
return 0;
}
/* Inserts string in ctx->yank into line at pos.
Return 0 on success, -1 if yank buffer is empty or too long */
int yank_buf(ChatContext *ctx)
{
if (!ctx->yank[0])
return -1;
if (ctx->yank_len + ctx->len >= MAX_STR_SIZE - 1)
return -1;
wmemmove(&ctx->line[ctx->pos + ctx->yank_len], &ctx->line[ctx->pos], ctx->len - ctx->pos);
wmemcpy(&ctx->line[ctx->pos], ctx->yank, ctx->yank_len);
ctx->pos += ctx->yank_len;
ctx->len += ctx->yank_len;
ctx->line[ctx->len] = L'\0';
return 0;
}
/* nulls line and sets pos, len and start to 0 */