diff options
Diffstat (limited to 'gnu/usr.bin/lynx/WWW/Library/Implementation/HTChunk.c')
| -rw-r--r-- | gnu/usr.bin/lynx/WWW/Library/Implementation/HTChunk.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/gnu/usr.bin/lynx/WWW/Library/Implementation/HTChunk.c b/gnu/usr.bin/lynx/WWW/Library/Implementation/HTChunk.c new file mode 100644 index 00000000000..fd66a482324 --- /dev/null +++ b/gnu/usr.bin/lynx/WWW/Library/Implementation/HTChunk.c @@ -0,0 +1,204 @@ +/* Chunk handling: Flexible arrays +** =============================== +** +*/ + +#include "HTUtils.h" +#include "HTChunk.h" +/*#include <stdio.h> included by HTUtils.h -- FM */ + +#include "LYLeaks.h" + +#define FREE(x) if (x) {free(x); x = NULL;} + +/* Create a chunk with a certain allocation unit +** -------------- +*/ +PUBLIC HTChunk * HTChunkCreate ARGS1 (int,grow) +{ + HTChunk * ch = (HTChunk *) calloc(1, sizeof(HTChunk)); + if (ch == NULL) + outofmem(__FILE__, "creation of chunk"); + + ch->data = 0; + ch->growby = grow; + ch->size = 0; + ch->allocated = 0; + return ch; +} + +/* Create a chunk with a certain allocation unit and ensured size +** -------------- +*/ +PUBLIC HTChunk * HTChunkCreate2 ARGS2 (int,grow, size_t, needed) +{ + HTChunk * ch = (HTChunk *) calloc(1, sizeof(HTChunk)); + if (ch == NULL) + outofmem(__FILE__, "HTChunkCreate2"); + + ch->growby = grow; + if (needed > 0) { + ch->allocated = needed-1 - ((needed-1) % ch->growby) + + ch->growby; /* Round up */ + ch->data = (char *)calloc(1, ch->allocated); + if (!ch->data) + outofmem(__FILE__, "HTChunkCreate2 data"); + } + ch->size = 0; + return ch; +} + + +/* Clear a chunk of all data +** -------------------------- +*/ +PUBLIC void HTChunkClear ARGS1 (HTChunk *,ch) +{ + FREE(ch->data); + ch->size = 0; + ch->allocated = 0; +} + + +/* Free a chunk +** ------------ +*/ +PUBLIC void HTChunkFree ARGS1 (HTChunk *,ch) +{ + FREE(ch->data); + FREE(ch); +} + + +/* Append a character +** ------------------ +*/ +PUBLIC void HTChunkPutc ARGS2 (HTChunk *,ch, char,c) +{ + if (ch->size >= ch->allocated) { + ch->allocated = ch->allocated + ch->growby; + ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated) + : (char *)calloc(1, ch->allocated); + if (!ch->data) + outofmem(__FILE__, "HTChunkPutc"); + } + ch->data[ch->size++] = c; +} + + +/* Ensure a certain size +** --------------------- +*/ +PUBLIC void HTChunkEnsure ARGS2 (HTChunk *,ch, int,needed) +{ + if (needed <= ch->allocated) return; + ch->allocated = needed-1 - ((needed-1) % ch->growby) + + ch->growby; /* Round up */ + ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated) + : (char *)calloc(1, ch->allocated); + if (ch->data == NULL) + outofmem(__FILE__, "HTChunkEnsure"); +} + +PUBLIC void HTChunkPutb ARGS3 (HTChunk *,ch, CONST char *,b, int,l) +{ + int needed = ch->size + l; + if (l <= 0) return; + if (needed > ch->allocated) { + ch->allocated = needed-1 - ((needed-1) % ch->growby) + + ch->growby; /* Round up */ + ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated) + : (char *)calloc(1, ch->allocated); + if (ch->data == NULL) + outofmem(__FILE__, "HTChunkPutb"); + } + memcpy(ch->data + ch->size, b, l); + ch->size += l; +} + +#define PUTC(code) ch->data[ch->size++] = (char)(code) +#define PUTC2(code) ch->data[ch->size++] = (char)(0x80|(0x3f &(code))) + +PUBLIC void HTChunkPutUtf8Char ARGS2( + HTChunk *, ch, + UCode_t, code) +{ + int utflen; + + if (code < 128) + utflen = 1; + else if (code < 0x800L) { + utflen = 2; + } else if (code < 0x10000L) { + utflen = 3; + } else if (code < 0x200000L) { + utflen = 4; + } else if (code < 0x4000000L) { + utflen = 5; + } else if (code<=0x7fffffffL) { + utflen = 6; + } else + utflen = 0; + + if (ch->size + utflen > ch->allocated) { + int growby = (ch->growby >= utflen) ? ch->growby : utflen; + ch->allocated = ch->allocated + growby; + ch->data = ch->data ? (char *)realloc(ch->data, ch->allocated) + : (char *)calloc(1, ch->allocated); + if (!ch->data) + outofmem(__FILE__, "HTChunkPutUtf8Char"); + } + + switch (utflen) { + case 0: + return; + case 1: + ch->data[ch->size++] = (char)code; + return; + case 2: + PUTC(0xc0 | (code>>6)); + break; + case 3: + PUTC(0xe0 | (code>>12)); + break; + case 4: + PUTC(0xf0 | (code>>18)); + break; + case 5: + PUTC(0xf8 | (code>>24)); + break; + case 6: + PUTC(0xfc | (code>>30)); + } + switch (utflen) { + case 6: + PUTC2(code>>24); + case 5: + PUTC2(code>>18); + case 4: + PUTC2(code>>12); + case 3: + PUTC2(code>>6); + case 2: + PUTC2(code); + } +} + +/* Terminate a chunk +** ----------------- +*/ +PUBLIC void HTChunkTerminate ARGS1 (HTChunk *,ch) +{ + HTChunkPutc(ch, (char)0); +} + + +/* Append a string +** --------------- +*/ +PUBLIC void HTChunkPuts ARGS2 (HTChunk *,ch, CONST char *,s) +{ + CONST char * p; + for (p=s; *p; p++) + HTChunkPutc(ch, *p); +} |