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highlight.c
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highlight.c
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#include <string.h>
#include "highlight.h"
#include "highlight/emit.h"
int ant_highlight_stateful(
const char *input, size_t input_len,
char *out, size_t out_size,
highlight_state *state
) {
hl_outbuf o;
hl_outbuf_init(&o, out, out_size);
hl_iter it;
hl_iter_init(&it, input, input_len, state);
hl_span span;
while (hl_iter_next(&it, &span) && !o.overflow)
hl_outbuf_emit_span(&o, span.cls, input + span.off, span.len);
*state = hl_iter_state(&it);
if (o.overflow) {
o.pos = 0;
o.overflow = false;
hl_outbuf_write_escaped(&o, input, input_len);
if (o.overflow) {
size_t safe = out_size > 1 ? out_size - 1 : 0;
if (safe > input_len) safe = input_len;
memcpy(out, input, safe);
out[safe] = '\0';
return (int)safe;
}
}
o.buf[o.pos] = '\0';
return (int)o.pos;
}
int ant_highlight(const char *input, size_t input_len, char *out, size_t out_size) {
highlight_state state = HL_STATE_INIT;
return ant_highlight_stateful(input, input_len, out, out_size, &state);
}
int highlight_js_line_clipped(
const char *line, size_t line_len,
size_t max_cols,
char *out, size_t out_size,
highlight_state *state
) {
hl_outbuf o;
hl_outbuf_init(&o, out, out_size);
hl_iter it;
hl_iter_init(&it, line, line_len, state);
size_t vis_cols = 0;
hl_span span;
while (hl_iter_next(&it, &span)) {
if (vis_cols >= max_cols) continue;
size_t span_remaining = max_cols - vis_cols;
size_t emit_len = span.len < span_remaining ? span.len : span_remaining;
if (!o.overflow) hl_outbuf_emit_span(&o, span.cls, line + span.off, emit_len);
vis_cols += span.len;
}
*state = hl_iter_state(&it);
if (o.overflow) {
o.pos = 0;
size_t emit = line_len < max_cols ? line_len : max_cols;
hl_outbuf_write_escaped(&o, line, emit);
if (o.overflow) {
size_t safe = out_size > 1 ? out_size - 1 : 0;
if (safe > emit) safe = emit;
memcpy(out, line, safe);
out[safe] = '\0';
return (int)safe;
}
}
o.buf[o.pos] = '\0';
return (int)o.pos;
}

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highlight.c (2 KB)

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