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pub fn substitute(format: []const u8, value: []const u8, buffer: []u8) []const u8 {
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if (format.len == 0) {
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const len = @min(value.len, buffer.len);
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@memcpy(buffer[0..len], value[0..len]);
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return buffer[0..len];
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}
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var out_idx: usize = 0;
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var fmt_idx: usize = 0;
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while (fmt_idx < format.len and out_idx < buffer.len -| value.len) {
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if (fmt_idx + 1 < format.len and format[fmt_idx] == '{' and format[fmt_idx + 1] == '}') {
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@memcpy(buffer[out_idx .. out_idx + value.len], value);
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out_idx += value.len;
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fmt_idx += 2;
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} else {
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buffer[out_idx] = format[fmt_idx];
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out_idx += 1;
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fmt_idx += 1;
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}
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}
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return buffer[0..out_idx];
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}
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pub fn substitute_multi(format: []const u8, values: []const []const u8, buffer: []u8) []const u8 {
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if (format.len == 0 and values.len > 0) {
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const len = @min(values[0].len, buffer.len);
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@memcpy(buffer[0..len], values[0][0..len]);
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return buffer[0..len];
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}
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var out_idx: usize = 0;
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var fmt_idx: usize = 0;
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var val_idx: usize = 0;
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while (fmt_idx < format.len and out_idx < buffer.len - 20) {
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if (fmt_idx + 1 < format.len and format[fmt_idx] == '{' and format[fmt_idx + 1] == '}') {
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if (val_idx < values.len) {
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const value = values[val_idx];
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if (out_idx + value.len <= buffer.len) {
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@memcpy(buffer[out_idx .. out_idx + value.len], value);
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out_idx += value.len;
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}
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val_idx += 1;
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}
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fmt_idx += 2;
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} else {
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buffer[out_idx] = format[fmt_idx];
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out_idx += 1;
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fmt_idx += 1;
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}
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}
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return buffer[0..out_idx];
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}
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