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Eliminate internal use of GETJOCTET() macro

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Because of 01e3032354 (officially
eliminating support for compilers without unsigned char, since we never
effectively supported those compilers anyhow), GETJOCTET() is now a
no-op.  Since that macro is in jmorecfg.h, it is part of the de facto
libjpeg API and must remain in the public headers.  However, there is no
reason to continue using it internally, and eliminating its internal use
improves code readability.
This commit is contained in:
DRC
2019-12-10 19:10:55 -06:00
parent e821464f79
commit 52fef34928
6 changed files with 108 additions and 111 deletions
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67
jdmarker.c
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@@ -151,7 +151,7 @@ typedef my_marker_reader *my_marker_ptr;
#define INPUT_BYTE(cinfo, V, action) \
MAKESTMT( MAKE_BYTE_AVAIL(cinfo, action); \
bytes_in_buffer--; \
V = GETJOCTET(*next_input_byte++); )
V = *next_input_byte++; )
/* As above, but read two bytes interpreted as an unsigned 16-bit integer.
* V should be declared unsigned int or perhaps JLONG.
@@ -159,10 +159,10 @@ typedef my_marker_reader *my_marker_ptr;
#define INPUT_2BYTES(cinfo, V, action) \
MAKESTMT( MAKE_BYTE_AVAIL(cinfo, action); \
bytes_in_buffer--; \
V = ((unsigned int)GETJOCTET(*next_input_byte++)) << 8; \
V = ((unsigned int)(*next_input_byte++)) << 8; \
MAKE_BYTE_AVAIL(cinfo, action); \
bytes_in_buffer--; \
V += GETJOCTET(*next_input_byte++); )
V += *next_input_byte++; )
/*
@@ -608,18 +608,18 @@ examine_app0(j_decompress_ptr cinfo, JOCTET *data, unsigned int datalen,
JLONG totallen = (JLONG)datalen + remaining;
if (datalen >= APP0_DATA_LEN &&
GETJOCTET(data[0]) == 0x4A &&
GETJOCTET(data[1]) == 0x46 &&
GETJOCTET(data[2]) == 0x49 &&
GETJOCTET(data[3]) == 0x46 &&
GETJOCTET(data[4]) == 0) {
data[0] == 0x4A &&
data[1] == 0x46 &&
data[2] == 0x49 &&
data[3] == 0x46 &&
data[4] == 0) {
/* Found JFIF APP0 marker: save info */
cinfo->saw_JFIF_marker = TRUE;
cinfo->JFIF_major_version = GETJOCTET(data[5]);
cinfo->JFIF_minor_version = GETJOCTET(data[6]);
cinfo->density_unit = GETJOCTET(data[7]);
cinfo->X_density = (GETJOCTET(data[8]) << 8) + GETJOCTET(data[9]);
cinfo->Y_density = (GETJOCTET(data[10]) << 8) + GETJOCTET(data[11]);
cinfo->JFIF_major_version = data[5];
cinfo->JFIF_minor_version = data[6];
cinfo->density_unit = data[7];
cinfo->X_density = (data[8] << 8) + data[9];
cinfo->Y_density = (data[10] << 8) + data[11];
/* Check version.
* Major version must be 1, anything else signals an incompatible change.
* (We used to treat this as an error, but now it's a nonfatal warning,
@@ -634,24 +634,22 @@ examine_app0(j_decompress_ptr cinfo, JOCTET *data, unsigned int datalen,
cinfo->JFIF_major_version, cinfo->JFIF_minor_version,
cinfo->X_density, cinfo->Y_density, cinfo->density_unit);
/* Validate thumbnail dimensions and issue appropriate messages */
if (GETJOCTET(data[12]) | GETJOCTET(data[13]))
TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL,
GETJOCTET(data[12]), GETJOCTET(data[13]));
if (data[12] | data[13])
TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL, data[12], data[13]);
totallen -= APP0_DATA_LEN;
if (totallen !=
((JLONG)GETJOCTET(data[12]) * (JLONG)GETJOCTET(data[13]) * (JLONG)3))
if (totallen != ((JLONG)data[12] * (JLONG)data[13] * (JLONG)3))
TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int)totallen);
} else if (datalen >= 6 &&
GETJOCTET(data[0]) == 0x4A &&
GETJOCTET(data[1]) == 0x46 &&
GETJOCTET(data[2]) == 0x58 &&
GETJOCTET(data[3]) == 0x58 &&
GETJOCTET(data[4]) == 0) {
data[0] == 0x4A &&
data[1] == 0x46 &&
data[2] == 0x58 &&
data[3] == 0x58 &&
data[4] == 0) {
/* Found JFIF "JFXX" extension APP0 marker */
/* The library doesn't actually do anything with these,
* but we try to produce a helpful trace message.
*/
switch (GETJOCTET(data[5])) {
switch (data[5]) {
case 0x10:
TRACEMS1(cinfo, 1, JTRC_THUMB_JPEG, (int)totallen);
break;
@@ -662,8 +660,7 @@ examine_app0(j_decompress_ptr cinfo, JOCTET *data, unsigned int datalen,
TRACEMS1(cinfo, 1, JTRC_THUMB_RGB, (int)totallen);
break;
default:
TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION,
GETJOCTET(data[5]), (int)totallen);
TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION, data[5], (int)totallen);
break;
}
} else {
@@ -684,16 +681,16 @@ examine_app14(j_decompress_ptr cinfo, JOCTET *data, unsigned int datalen,
unsigned int version, flags0, flags1, transform;
if (datalen >= APP14_DATA_LEN &&
GETJOCTET(data[0]) == 0x41 &&
GETJOCTET(data[1]) == 0x64 &&
GETJOCTET(data[2]) == 0x6F &&
GETJOCTET(data[3]) == 0x62 &&
GETJOCTET(data[4]) == 0x65) {
data[0] == 0x41 &&
data[1] == 0x64 &&
data[2] == 0x6F &&
data[3] == 0x62 &&
data[4] == 0x65) {
/* Found Adobe APP14 marker */
version = (GETJOCTET(data[5]) << 8) + GETJOCTET(data[6]);
flags0 = (GETJOCTET(data[7]) << 8) + GETJOCTET(data[8]);
flags1 = (GETJOCTET(data[9]) << 8) + GETJOCTET(data[10]);
transform = GETJOCTET(data[11]);
version = (data[5] << 8) + data[6];
flags0 = (data[7] << 8) + data[8];
flags1 = (data[9] << 8) + data[10];
transform = data[11];
TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform);
cinfo->saw_Adobe_marker = TRUE;
cinfo->Adobe_transform = (UINT8)transform;