libiconv\u5b98\u65b9\u6e90\u7801\uff1ahttps:\/\/ftp.gnu.org\/pub\/gnu\/libiconv\/<\/p>\n
\u53c2\u80031\uff1ahttp:\/\/bbs.chinaunix.net\/thread-3775808-1-1.html<\/p>\n
\u88c1\u526alibiconv\uff0c\u9879\u76ee\u91cc\u9762\u53ea\u9700\u8981UTF8\u4e0eGB2312\u7684\u8f6c\u6362\u3002
\n1.\u4e0b\u8f7d\u6e90\u4ee3\u7801\u7f16\u8bd1\uff0c\u7f16\u5199\u6d4b\u8bd5\u4ee3\u7801\uff0cgdb\u8c03\u8bd5\uff0c\u67e5\u770bUTF8\u548cGB2312\u8f6c\u6362\u8c03\u7528\u7684\u51fd\u6570\uff0c\u5206\u522b\u662fxxx_wctomb\u548cxxx_mbtowc(\u6587\u4ef6\u5c31\u662futf8.h\/euc_cn.h),aliases.gperf\u6587\u4ef6\u91cc\u9762\u6709\u5b9a\u4e49UTF-8, ei_utf8\u548cGB2312, ei_euc_cn\u3002
\n2\uff0eencoding.def\u6587\u4ef6\u8fdb\u884c\u4fee\u6539\uff0c\u6700\u540e\u53ea\u5269\u4e0b\uff1a<\/p>\n
DEFENCODING(( “US-ASCII”, \/* IANA *\/
\n “ASCII”, \/* IANA, JDK 1.1 *\/
\n “ISO646-US”, \/* IANA *\/
\n “ISO_646.IRV:1991”, \/* IANA *\/
\n “ISO-IR-6”, \/* IANA *\/
\n “ANSI_X3.4-1968”, \/* IANA *\/
\n “ANSI_X3.4-1986”, \/* IANA *\/
\n “CP367”, \/* IANA *\/
\n “IBM367”, \/* IANA *\/
\n “US”, \/* IANA *\/
\n “csASCII”, \/* IANA *\/
\n \/*”ISO646.1991-IRV”, X11R6.4 *\/
\n ),
\n ascii,
\n { ascii_mbtowc, NULL }, { ascii_wctomb, NULL })<\/p>\n
\/* General multi-byte encodings *\/<\/p>\n
DEFENCODING(( “UTF-8″, \/* IANA, RFC 2279 *\/
\n \/*”UTF8″, JDK 1.1 *\/
\n \/*”CP65001”, Windows *\/
\n ),
\n utf8,
\n { utf8_mbtowc, NULL }, { utf8_wctomb, NULL })<\/p>\n
DEFENCODING(( “GB_2312-80”, \/* IANA *\/
\n “ISO-IR-58”, \/* IANA *\/
\n “csISO58GB231280”, \/* IANA *\/
\n “CHINESE”, \/* IANA *\/
\n \/*”GB2312.1980-0″, X11R6.4 *\/
\n ),
\n gb2312,
\n { gb2312_mbtowc, NULL }, { gb2312_wctomb, NULL })<\/p>\n
DEFENCODING(( “EUC-CN”, \/* glibc *\/
\n “EUCCN”, \/* glibc, IRIX *\/
\n “GB2312”, \/* IANA *\/
\n “CN-GB”, \/* RFC 1922 *\/
\n “csGB2312″, \/* IANA *\/
\n \/*”EUC_CN”, JDK 1.1 *\/
\n \/*”CP51936″, Windows *\/
\n ),
\n euc_cn,
\n { euc_cn_mbtowc, NULL }, { euc_cn_wctomb, NULL })<\/p>\n
3.\u7136\u540e\u5bf9aliases.h\u8fdb\u884c\u4fee\u6539,\u5220\u9664\u6ca1\u6709\u7528\u7684\u7f16\u7801\u3002<\/p>\n
struct stringpool_t
\n {
\n char stringpool_str117[sizeof(“CHINESE”)];
\n char stringpool_str120[sizeof(“ASCII”)];
\n char stringpool_str165[sizeof(“GB2312”)];
\n char stringpool_str255[sizeof(“UTF-8”)];
\n };
\nstatic const struct stringpool_t stringpool_contents =
\n {
\n “CHINESE”,
\n “ASCII”,
\n “GB2312”,
\n “UTF-8”,
\n };
\n\/* \u4e0e\u4e0a\u9762\u7684struct stringpool_t\u5bf9\u5e94\u8d77\u6765 *\/
\nstatic const struct alias aliases[] =
\n {
\n#line 14 “lib\/aliases.gperf” \/* \u4e0egperf\u6587\u4ef6\u4e2d\u7684\u884c\u53f7\u5bf9\u5e94\u8d77\u6765*\/
\n {(int)(long)&((struct stringpool_t *)0)->stringpool_str117, ei_gb2312},
\n#line 12 “lib\/aliases.gperf”
\n {(int)(long)&((struct stringpool_t *)0)->stringpool_str120, ei_ascii},
\n#line 15 “lib\/aliases.gperf”
\n {(int)(long)&((struct stringpool_t *)0)->stringpool_str165, ei_euc_cn},
\n#line 13 “lib\/aliases.gperf”
\n {(int)(long)&((struct stringpool_t *)0)->stringpool_str255, ei_utf8},
\n };<\/p>\n
\/*\u4fee\u6539\u4e3a\u53ea\u652f\u6301UTF8\u548cGB2312\uff0c\u4e0d\u7528\u5728\u67e5\u627e\uff0c\u53ef\u4ee5\u5220\u9664\u591a\u4f59\u7684\u4ee3\u7801*\/
\nconst struct alias *
\naliases_lookup (register const char *str, register unsigned int len)
\n{
\n if (!strcmp(str, “UTF-8”))
\n return &aliases[3];
\n else if (!strcmp(str, “GB2312”))
\n return &aliases[2];
\n return 0;
\n} <\/p>\n
4\uff0e\u4fee\u6539aliases. gperf\uff0c\u5220\u9664\u5927\u90e8\u5206\u7f16\u7801\uff0c\u53ea\u5269\u4e0b\u4f60\u9700\u8981\u7684\u7f16\u7801\u7c7b\u578b\u3002<\/p>\n
struct alias { int name; unsigned int encoding_index; };
\n%struct-type
\n%language=ANSI-C
\n%define hash-function-name aliases_hash
\n%define lookup-function-name aliases_lookup
\n%7bit
\n%readonly-tables
\n%global-table
\n%define word-array-name aliases
\n%pic
\n%%
\nASCII, ei_ascii
\nUTF-8, ei_utf8
\nCHINESE, ei_gb2312
\nGB2312, ei_euc_cn <\/p>\n
5.\u7136\u540e\u518dmake\uff0c\u4f1a\u6709\u51e0\u4e2a\u6587\u4ef6\u62a5\u9519\uff08canonical.h\u7b49\uff09\uff0c\u5bf9\u62a5\u9519\u7684\u5730\u65b9\u8fdb\u884c\u5c4f\u853d\uff0c\u5177\u4f53\u770b\u4e0a\u4f20\u5df2\u88c1\u51cf\u7684libiconv\u6e90\u4ee3\u7801\u5305\uff1a<\/p>\n