PNG_FP_SAW_SIGN  2593 png.c                case 43:  type = PNG_FP_SAW_SIGN;                   break;
PNG_FP_SAW_SIGN  2594 png.c                case 45:  type = PNG_FP_SAW_SIGN + PNG_FP_NEGATIVE; break;
PNG_FP_SAW_SIGN  2611 png.c                case PNG_FP_INTEGER + PNG_FP_SAW_SIGN:
PNG_FP_SAW_SIGN  2669 png.c                case PNG_FP_EXPONENT + PNG_FP_SAW_SIGN:
PNG_FP_SAW_SIGN  2673 png.c                   png_fp_add(state, PNG_FP_SAW_SIGN);