lzss解码EOF字符问题

我正在使用Okamura的lzss实现： https ：//oku.edu.mie-u.ac.jp/~okumura/compression/lzss.c

int enc_i = 0; int getbit(int n, unsigned char *enco_buf) /* get n bits */ { int i, x; static int buf, mask = 0; x = 0; for (i = 0; i < n; i++) { if (mask == 0) { //if ((buf = fgetc(infile)) == EOF) return EOF; //if ((buf = fgetc(infile)) == EOF) return EOF; if((buf = enco_buf[enc_i]) == '\0') break; //buf = enco_buf[enc_i]; enc_i++; //printf("\nValue of enc : %d\n", enc_i); mask = 128; } x <>= 1; } return x; } void decode(unsigned char *enco_buf) { int i, j, k, r, c; outfile = fopen ("test_lib.txt", "wb"); for (i = 0; i < N - F; i++) buffer[i] = ' '; r = N - F; while ((c = getbit(1, enco_buf)) != '\0') { if (c) { if ((c = getbit(8, enco_buf)) == '\0') break; fputc(c, outfile); buffer[r++] = c; r &= (N - 1); } else { if ((i = getbit(EI, enco_buf)) == '\0') break; if ((j = getbit(EJ, enco_buf)) == '\0') break; for (k = 0; k <= j + 1; k++) { c = buffer[(i + k) & (N - 1)]; fputc(c, outfile); buffer[r++] = c; r &= (N - 1); } } } fclose(outfile); } 

我没有从文件中获取输入，而是采用了一个编码缓冲区，我将其传递给函数decode（），后者依次传递给getbit（）。 但它正在解码到一定数量的比特，即。 43.我猜的是我把’\ 0’而不是EOF（因为它在文件结束标记中）来检测字符串结束。 这可能是执行break语句执行’\ 0’的问题。 这可能不是真的，但情况可能如此。 编码部分没有问题，因为我用原始代码validation了它。 任何人都可以建议问题出在哪里？

编辑：源代码：

 /* LZSS encoder-decoder (Haruhiko Okumura; public domain) */ #include  #include  #include  #include  #include "lzss_lib.h" #define EI 11 /* typically 10..13 */ #define EJ 4 /* typically 4..5 */ #define P 1 /* If match length <= P then output one character */ #define N (1 << EI) /* buffer size */ #define F ((1 <>= 1) == 0) { put_buf0[payload_i] = bit_buffer; payload_i++; bit_buffer = 0; bit_mask = 128; codecount++; } } void putbit0(unsigned char *put_buf1) { if ((bit_mask >>= 1) == 0) { put_buf1[payload_i] = bit_buffer; payload_i++; bit_buffer = 0; bit_mask = 128; codecount++; } } void flush_bit_buffer(unsigned char *flush_bit) { if (bit_mask != 128) { flush_bit[payload_i] = bit_buffer; codecount++; } } void output1(int c, unsigned char *buf_output1) { int mask; putbit1(buf_output1); mask = 256; while (mask >>= 1) { if (c & mask) putbit1(buf_output1); else putbit0(buf_output1); } } void output2(int x, int y, unsigned char *buf_output2) { int mask; putbit0(buf_output2); mask = N; while (mask >>= 1) { if (x & mask) putbit1(buf_output2); else putbit0(buf_output2); } mask = (1 <>= 1) { if (y & mask) putbit1(buf_output2); else putbit0(buf_output2); } } void encode(unsigned char *string_buf, unsigned char *out_buf, unsigned long *out_buf_len) { int i, j, f1, x, y, r, s, bufferend, c, tt; tt = 0; for (i = 0; i < N - F; i++) buffer[i] = ' '; for (i = N - F; i < N * 2; i++) { if((c = string_buf[tt]) == '\0') break; buffer[i] = c; textcount++; tt++; } bufferend = i; r = N - F; s = 0; while (r < bufferend) { f1 = (F = s; i--) if (buffer[i] == c) { for (j = 1; j  y) { x = i; y = j; } } if (y = N * 2 - F) { for (i = 0; i < N; i++) buffer[i] = buffer[i + N]; bufferend -= N; r -= N; s -= N; while (bufferend < N * 2) { if((c = string_buf[tt]) == '\0') break; buffer[bufferend++] = c; textcount++; tt++; } } } flush_bit_buffer(out_buf); *out_buf_len = codecount; printf("text: %ld bytes\n", textcount); printf("code: %ld bytes (%ld%%)\n", codecount, (codecount * 100) / textcount); } int getbit(int n, unsigned char *enco_buf) /* get n bits */ { int i, x; static int buf, mask = 0; x = 0; for (i = 0; i < n; i++) { if (mask == 0) { //if ((buf = fgetc(infile)) == EOF) return EOF; //if ((buf = fgetc(infile)) == EOF) return EOF; if((buf = enco_buf[enc_i]) == '\0') break; //buf = enco_buf[enc_i]; enc_i++; printf("\nValue of enc : %d\n", enc_i); mask = 128; } x <>= 1; } return x; } void decode(unsigned char *enco_buf) { int i, j, k, r, c; outfile = fopen ("test_lib.txt", "wb"); for (i = 0; i < N - F; i++) buffer[i] = ' '; r = N - F; while ((c = getbit(1, enco_buf)) != '\0') { if (c) { if ((c = getbit(8, enco_buf)) == '\0') break; fputc(c, outfile); buffer[r++] = c; r &= (N - 1); } else { if ((i = getbit(EI, enco_buf)) == '\0') break; if ((j = getbit(EJ, enco_buf)) == '\0') break; for (k = 0; k <= j + 1; k++) { c = buffer[(i + k) & (N - 1)]; fputc(c, outfile); buffer[r++] = c; r &= (N - 1); } } } fclose(outfile); } 

和测试例子：

 #include  #include  #include  #include  #include "lzss_lib.h" unsigned char compr_data[4096]; unsigned long pw = 0; unsigned long payload_len = 0; volatile int errno; unsigned char *unc_data = "d(2306):AuthorisationScheme:RADIUSserveratfd04:bd3:80e8:1::1usingPAPD/6LoWPANd(2306):WritingModule:SecurityConfigD/6LoWPANd(2306):WritingModule:RunCoordinatorD/6LoWPANd(2306):RequestingmoduleaddressD/6LoWPANd(2306):WritingModule:GetAddressD/smartcard-jni(2781):SmartCard_state_update_callback:status=6D/SmartCardNative(2781):status=6D/smartcard(2781):PN532Smartcard_loop_threadexitD/smartcard-jni(2781):SmartCard_loop_thread:SMARTCARD_STATUS_ABORTD/smartcard(2781):Smartcard_loop_uninitD/smartcard(2781):2D/serialcomm_pn532(2781):PN532:Readingfrom/dev/ttyUSB0-->D/smartcard(2781):Received(0x3)fromPN532:(dataBuf[0]:0x1)(0x1f5988)D/smartcard(2781):ReceivedStatusfromPN532:OK(cmd:0x2)D/smartcard-jni(2781):SmartCard_listener_update_callbackD/smartcard(2781):Received(0x1c2)fromPN532:(dataBuf[0]:0x32)(0x1f5988)D/smartcard(2781):vd(2306):AuthorisationScheme:RADIUSserveratfd04:bd3:80e8:1::1usingPAPD/6LoWPANd(2306):"; FILE *outfile; int main(void) { memset (compr_data, '\0', sizeof(compr_data)); encode(unc_data, compr_data, &payload_len); decode(compr_data); return 0; }