forked from osmocom/wireshark
126 lines
2.2 KiB
C
126 lines
2.2 KiB
C
/* make_charset_table.c
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* sample program to generate tables for charsets.c using iconv
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*
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* public domain
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <errno.h>
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#include <iconv.h>
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#define UNREPL 0xFFFD
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int main(int argc, char **argv) {
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/* for now only UCS-2 */
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uint16_t table[0x100];
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iconv_t conv;
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const char *charset;
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int i, j;
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/* 0x00 ... 0x7F same as ASCII? */
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int ascii_based = 1;
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/* 0x00 ... 0x9F same as ISO? */
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int iso_based = 1;
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if (argc != 2) {
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printf("usage: %s <charset>\n", argv[0]);
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return 1;
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}
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charset = argv[1];
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conv = iconv_open("UCS-2", charset);
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if (conv == (iconv_t) -1) {
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perror("iconv_open");
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return 2;
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}
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iconv_close(conv);
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for (i = 0x00; i < 0x100; i++) {
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unsigned char in[1], out[2];
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size_t inlen = 1, outlen = 2;
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char *inbuf = (char *) in;
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char *outbuf = (char *) out;
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size_t ret;
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in[0] = i;
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conv = iconv_open("UCS-2BE", charset);
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if (conv == (iconv_t) -1) {
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/* shouldn't fail now */
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perror("iconv_open");
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return 2;
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}
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ret = iconv(conv, &inbuf, &inlen, &outbuf, &outlen);
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if (ret == (size_t) -1 && errno == EILSEQ) {
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table[i] = UNREPL;
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iconv_close(conv);
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continue;
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}
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if (ret == (size_t) -1) {
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perror("iconv");
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iconv_close(conv);
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return 4;
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}
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iconv_close(conv);
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if (ret != 0 || inlen != 0 || outlen != 0) {
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fprintf(stderr, "%d: smth went wrong: %zu %zu %zu\n", i, ret, inlen, outlen);
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return 3;
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}
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if (i < 0x80 && (out[0] != 0 || out[1] != i))
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ascii_based = 0;
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if (i < 0xA0 && (out[0] != 0 || out[1] != i))
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iso_based = 0;
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table[i] = (out[0] << 8) | out[1];
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}
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/* iso_based not supported */
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iso_based = 0;
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printf("/* generated by %s %s */\n", argv[0], charset);
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if (iso_based)
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i = 0xA0;
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else if (ascii_based)
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i = 0x80;
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else
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i = 0;
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printf("const gunichar2 charset_table_%s[0x%x] = {\n", charset, 0x100 - i);
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while (i < 0x100) {
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int start = i;
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printf(" ");
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for (j = 0; j < 8; j++, i++) {
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if (table[i] == UNREPL)
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printf("UNREPL, ");
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else
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printf("0x%.4x, ", table[i]);
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}
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if ((start & 0xf) == 0)
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printf(" /* 0x%.2X - */", start);
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else
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printf(" /* - 0x%.2X */", i - 1);
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printf("\n");
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}
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printf("};\n");
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return 0;
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}
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