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Use 3-byte file header

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emmanuel-marty
2019-04-03 11:26:36 +02:00
parent 1f04705845
commit 11d1ff8cd7
1 changed files with 13 additions and 19 deletions
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32
src/main.c
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@@ -124,16 +124,14 @@ static int lzsa_compress(const char *pszInFilename, const char *pszOutFilename,
return 100; return 100;
} }
unsigned char cHeader[5]; unsigned char cHeader[3];
cHeader[0] = 0x7b; /* Magic number: 0xd70f9e7b */ cHeader[0] = 0x7b; /* Magic number: 0x9e7b */
cHeader[1] = 0x9e; cHeader[1] = 0x9e;
cHeader[2] = 0x0f; cHeader[2] = 0; /* Format version 1 */
cHeader[3] = 0xd7;
cHeader[4] = 0; /* Format version 1 */
bError = fwrite(cHeader, 1, 5, f_out) != 5; bError = fwrite(cHeader, 1, 3, f_out) != 3;
nCompressedSize += 5LL; nCompressedSize += 3LL;
if (nVerbosity > 0) { if (nVerbosity > 0) {
nStartTime = lzsa_get_time(); nStartTime = lzsa_get_time();
@@ -260,11 +258,11 @@ static int lzsa_decompress(const char *pszInFilename, const char *pszOutFilename
return 100; return 100;
} }
unsigned char cHeader[5]; unsigned char cHeader[3];
memset(cHeader, 0, 5); memset(cHeader, 0, 3);
if (fread(cHeader, 1, 5, pInFile) != 5) { if (fread(cHeader, 1, 3, pInFile) != 3) {
fclose(pInFile); fclose(pInFile);
pInFile = NULL; pInFile = NULL;
fprintf(stderr, "error reading header in input file\n"); fprintf(stderr, "error reading header in input file\n");
@@ -273,9 +271,7 @@ static int lzsa_decompress(const char *pszInFilename, const char *pszOutFilename
if (cHeader[0] != 0x7b || if (cHeader[0] != 0x7b ||
cHeader[1] != 0x9e || cHeader[1] != 0x9e ||
cHeader[2] != 0x0f || cHeader[2] != 0) {
cHeader[3] != 0xd7 ||
cHeader[4] != 0) {
fclose(pInFile); fclose(pInFile);
pInFile = NULL; pInFile = NULL;
fprintf(stderr, "invalid magic number or format version in input file\n"); fprintf(stderr, "invalid magic number or format version in input file\n");
@@ -414,11 +410,11 @@ static int lzsa_compare(const char *pszInFilename, const char *pszOutFilename, i
return 100; return 100;
} }
unsigned char cHeader[5]; unsigned char cHeader[3];
memset(cHeader, 0, 5); memset(cHeader, 0, 3);
if (fread(cHeader, 1, 5, pInFile) != 5) { if (fread(cHeader, 1, 3, pInFile) != 3) {
fclose(pInFile); fclose(pInFile);
pInFile = NULL; pInFile = NULL;
fprintf(stderr, "error reading header in compressed input file\n"); fprintf(stderr, "error reading header in compressed input file\n");
@@ -427,9 +423,7 @@ static int lzsa_compare(const char *pszInFilename, const char *pszOutFilename, i
if (cHeader[0] != 0x7b || if (cHeader[0] != 0x7b ||
cHeader[1] != 0x9e || cHeader[1] != 0x9e ||
cHeader[2] != 0x0f || cHeader[2] != 0) {
cHeader[3] != 0xd7 ||
cHeader[4] != 0) {
fclose(pInFile); fclose(pInFile);
pInFile = NULL; pInFile = NULL;
fprintf(stderr, "invalid magic number or format version in input file\n"); fprintf(stderr, "invalid magic number or format version in input file\n");