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fix: correct CP037 translation table for [ ] and NEL #37

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Merged
mgrossmann merged 1 commit into from
Mar 21, 2026
Merged

fix: correct CP037 translation table for [ ] and NEL #37

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34 changes: 18 additions & 16 deletions src/httpxlat.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,18 +27,20 @@
/* ------------------------------------------------------------------ */
/* IBM Code Page 037 (CECP US/Canada) */
/* */
/* Symmetric NL/LF mapping: */
/* ASCII LF (0x0A) <-> EBCDIC LF (0x25) — roundtrip clean */
/* ASCII NEL (0x85) <-> EBCDIC NEL (0x15) — roundtrip clean */
/* NL/LF mapping — modified from pure CP037: */
/* ASCII LF (0x0A) -> EBCDIC NEL (0x15) <- override for ecosystem */
/* EBCDIC NEL(0x15) -> ASCII LF (0x0A) <- symmetric roundtrip */
/* EBCDIC LF (0x25) -> ASCII NEL (0x85) <- unchanged */
/* */
/* NOTE: Pure CP037 maps NEL (0x15) -> 0x85, NOT 0x0A. Since the */
/* C compiler generates 0x15 for '\n', this codepage is unsuitable */
/* as HTTP server default — use IBM1047 instead. */
/* Pure CP037 maps ASCII LF to EBCDIC LF (0x25), but the mvslovers */
/* ecosystem uses NEL (0x15) as newline: c2asm370 '\n', crent370 */
/* printf, and all UFS files written by C programs emit 0x15. This */
/* override makes atoe consistent with that convention. */
/* ------------------------------------------------------------------ */

static const unsigned char cp037_atoe[256] = {
/* 0x00-0x07 */ 0x00, 0x01, 0x02, 0x03, 0x37, 0x2D, 0x2E, 0x2F,
/* 0x08-0x0F */ 0x16, 0x05, 0x25, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
/* 0x08-0x0F */ 0x16, 0x05, 0x15, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
/* 0x10-0x17 */ 0x10, 0x11, 0x12, 0x13, 0x3C, 0x3D, 0x32, 0x26,
/* 0x18-0x1F */ 0x18, 0x19, 0x3F, 0x27, 0x1C, 0x1D, 0x1E, 0x1F,
/* 0x20-0x27 sp ! " # $ % & ' */
Expand All @@ -56,7 +58,7 @@ static const unsigned char cp037_atoe[256] = {
/* 0x50-0x57 P Q R S T U V W */
0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6,
/* 0x58-0x5F X Y Z [ \ ] ^ _ */
0xE7, 0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0xB0, 0x6D,
0xE7, 0xE8, 0xE9, 0xBA, 0xE0, 0xBB, 0xB0, 0x6D,
/* 0x60-0x67 ` a b c d e f g */
0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
/* 0x68-0x6F h i j k l m n o */
Expand All @@ -70,13 +72,13 @@ static const unsigned char cp037_atoe[256] = {
/* 0x90-0x97 */ 0x30, 0x31, 0x1A, 0x33, 0x34, 0x35, 0x36, 0x08,
/* 0x98-0x9F */ 0x38, 0x39, 0x3A, 0x3B, 0x04, 0x14, 0x3E, 0xFF,
/* 0xA0-0xA7 */ 0x41, 0xAA, 0x4A, 0xB1, 0x9F, 0xB2, 0x6A, 0xB5,
/* 0xA8-0xAF */ 0xBB, 0xB4, 0x9A, 0x8A, 0x5F, 0xCA, 0xAF, 0xBC,
/* 0xA8-0xAF */ 0xBD, 0xB4, 0x9A, 0x8A, 0x5F, 0xCA, 0xAF, 0xBC,
/* 0xB0-0xB7 */ 0x90, 0x8F, 0xEA, 0xFA, 0xBE, 0xA0, 0xB6, 0xB3,
/* 0xB8-0xBF */ 0x9D, 0xDA, 0x9B, 0x8B, 0xB7, 0xB8, 0xB9, 0xAB,
/* 0xC0-0xC7 */ 0x64, 0x65, 0x62, 0x66, 0x63, 0x67, 0x9E, 0x68,
/* 0xC8-0xCF */ 0x74, 0x71, 0x72, 0x73, 0x78, 0x75, 0x76, 0x77,
/* 0xD0-0xD7 */ 0xAC, 0x69, 0xED, 0xEE, 0xEB, 0xEF, 0xEC, 0xBF,
/* 0xD8-0xDF */ 0x80, 0xFD, 0xFE, 0xFB, 0xFC, 0xBA, 0xAE, 0x59,
/* 0xD8-0xDF */ 0x80, 0xFD, 0xFE, 0xFB, 0xFC, 0xAD, 0xAE, 0x59,
/* 0xE0-0xE7 */ 0x44, 0x45, 0x42, 0x46, 0x43, 0x47, 0x9C, 0x48,
/* 0xE8-0xEF */ 0x54, 0x51, 0x52, 0x53, 0x58, 0x55, 0x56, 0x57,
/* 0xF0-0xF7 */ 0x8C, 0x49, 0xCD, 0xCE, 0xCB, 0xCF, 0xCC, 0xE1,
Expand All @@ -86,9 +88,9 @@ static const unsigned char cp037_atoe[256] = {
static const unsigned char cp037_etoa[256] = {
/* 0x00-0x07 */ 0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
/* 0x08-0x0F */ 0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
/* 0x10-0x17 */ 0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
/* 0x10-0x17 */ 0x10, 0x11, 0x12, 0x13, 0x9D, 0x0A, 0x08, 0x87,
/* 0x18-0x1F */ 0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
/* 0x20-0x27 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
/* 0x20-0x27 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x17, 0x1B,
/* 0x28-0x2F */ 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
/* 0x30-0x37 */ 0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
/* 0x38-0x3F */ 0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
Expand Down Expand Up @@ -118,12 +120,12 @@ static const unsigned char cp037_etoa[256] = {
0x71, 0x72, 0xAA, 0xBA, 0xE6, 0xB8, 0xC6, 0xA4,
/* 0xA0-0xAF mu ~ s t u v w x */
0xB5, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
/* 0xA8-0xAF y z [ */
0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0x5B, 0xDE, 0xAE,
/* 0xA8-0xAF y z ý */
0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0xDD, 0xDE, 0xAE,
/* 0xB0-0xB7 ^ */
0x5E, 0xA3, 0xA5, 0xB7, 0xA9, 0xA7, 0xB6, 0xBC,
/* 0xB8-0xBF ] */
0xBD, 0xBE, 0xDD, 0xA8, 0xAF, 0x5D, 0xB4, 0xD7,
/* 0xB8-0xBF [ ] ¨ */
0xBD, 0xBE, 0x5B, 0x5D, 0xAF, 0xA8, 0xB4, 0xD7,
/* 0xC0-0xC7 { A B C D E F G */
0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
/* 0xC8-0xCF H I */
Expand Down
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