mirror of
https://github.com/DaveGamble/cJSON.git
synced 2023-08-10 21:13:26 +03:00
Update to permit compilation with gcc -ansi flag
(changed all C++ // comments to C /* */ comments). git-svn-id: http://svn.code.sf.net/p/cjson/code@34 e3330c51-1366-4df0-8b21-3ccf24e3d50e
This commit is contained in:
Dave Gamble
150
cJSON.c
150
cJSON.c
@ -20,8 +20,8 @@
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THE SOFTWARE.
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*/
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// cJSON
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// JSON parser in C.
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/* cJSON */
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/* JSON parser in C. */
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#include <string.h>
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#include <stdio.h>
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@ -65,7 +65,7 @@ void cJSON_InitHooks(cJSON_Hooks* hooks)
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cJSON_free = (hooks->free_fn)?hooks->free_fn:free;
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}
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// Internal constructor.
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/* Internal constructor. */
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static cJSON *cJSON_New_Item()
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{
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cJSON* node = (cJSON*)cJSON_malloc(sizeof(cJSON));
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@ -73,7 +73,7 @@ static cJSON *cJSON_New_Item()
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return node;
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}
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// Delete a cJSON structure.
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/* Delete a cJSON structure. */
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void cJSON_Delete(cJSON *c)
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{
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cJSON *next;
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@ -88,22 +88,22 @@ void cJSON_Delete(cJSON *c)
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}
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}
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// Parse the input text to generate a number, and populate the result into item.
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/* Parse the input text to generate a number, and populate the result into item. */
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static const char *parse_number(cJSON *item,const char *num)
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{
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double n=0,sign=1,scale=0;int subscale=0,signsubscale=1;
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// Could use sscanf for this?
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if (*num=='-') sign=-1,num++; // Has sign?
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if (*num=='0') num++; // is zero
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if (*num>='1' && *num<='9') do n=(n*10.0)+(*num++ -'0'); while (*num>='0' && *num<='9'); // Number?
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if (*num=='.') {num++; do n=(n*10.0)+(*num++ -'0'),scale--; while (*num>='0' && *num<='9');} // Fractional part?
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if (*num=='e' || *num=='E') // Exponent?
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{ num++;if (*num=='+') num++; else if (*num=='-') signsubscale=-1,num++; // With sign?
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while (*num>='0' && *num<='9') subscale=(subscale*10)+(*num++ - '0'); // Number?
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/* Could use sscanf for this? */
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if (*num=='-') sign=-1,num++; /* Has sign? */
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if (*num=='0') num++; /* is zero */
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if (*num>='1' && *num<='9') do n=(n*10.0)+(*num++ -'0'); while (*num>='0' && *num<='9'); /* Number? */
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if (*num=='.') {num++; do n=(n*10.0)+(*num++ -'0'),scale--; while (*num>='0' && *num<='9');} /* Fractional part? */
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if (*num=='e' || *num=='E') /* Exponent? */
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{ num++;if (*num=='+') num++; else if (*num=='-') signsubscale=-1,num++; /* With sign? */
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while (*num>='0' && *num<='9') subscale=(subscale*10)+(*num++ - '0'); /* Number? */
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}
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n=sign*n*pow(10.0,(scale+subscale*signsubscale)); // number = +/- number.fraction * 10^+/- exponent
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n=sign*n*pow(10.0,(scale+subscale*signsubscale)); /* number = +/- number.fraction * 10^+/- exponent */
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item->valuedouble=n;
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item->valueint=(int)n;
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@ -111,19 +111,19 @@ static const char *parse_number(cJSON *item,const char *num)
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return num;
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}
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// Render the number nicely from the given item into a string.
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/* Render the number nicely from the given item into a string. */
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static char *print_number(cJSON *item)
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{
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char *str;
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double d=item->valuedouble;
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if (fabs(((double)item->valueint)-d)<=DBL_EPSILON && d<=INT_MAX && d>=INT_MIN)
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{
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str=(char*)cJSON_malloc(21); // 2^64+1 can be represented in 21 chars.
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str=(char*)cJSON_malloc(21); /* 2^64+1 can be represented in 21 chars. */
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if (str) sprintf(str,"%d",item->valueint);
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}
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else
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{
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str=(char*)cJSON_malloc(64); // This is a nice tradeoff.
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str=(char*)cJSON_malloc(64); /* This is a nice tradeoff. */
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if (str)
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{
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if (fabs(floor(d)-d)<=DBL_EPSILON) sprintf(str,"%.0f",d);
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@ -134,16 +134,16 @@ static char *print_number(cJSON *item)
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return str;
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}
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// Parse the input text into an unescaped cstring, and populate item.
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/* Parse the input text into an unescaped cstring, and populate item. */
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static const unsigned char firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
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static const char *parse_string(cJSON *item,const char *str)
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{
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const char *ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc;
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if (*str!='\"') return 0; // not a string!
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if (*str!='\"') return 0; /* not a string! */
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while (*ptr!='\"' && (unsigned char)*ptr>31 && ++len) if (*ptr++ == '\\') ptr++; // Skip escaped quotes.
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while (*ptr!='\"' && (unsigned char)*ptr>31 && ++len) if (*ptr++ == '\\') ptr++; /* Skip escaped quotes. */
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out=(char*)cJSON_malloc(len+1); // This is how long we need for the string, roughly.
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out=(char*)cJSON_malloc(len+1); /* This is how long we need for the string, roughly. */
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if (!out) return 0;
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ptr=str+1;ptr2=out;
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@ -160,8 +160,8 @@ static const char *parse_string(cJSON *item,const char *str)
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case 'n': *ptr2++='\n'; break;
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case 'r': *ptr2++='\r'; break;
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case 't': *ptr2++='\t'; break;
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case 'u': // transcode utf16 to utf8. DOES NOT SUPPORT SURROGATE PAIRS CORRECTLY.
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sscanf(ptr+1,"%4x",&uc); // get the unicode char.
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case 'u': /* transcode utf16 to utf8. DOES NOT SUPPORT SURROGATE PAIRS CORRECTLY. */
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sscanf(ptr+1,"%4x",&uc); /* get the unicode char. */
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len=3;if (uc<0x80) len=1;else if (uc<0x800) len=2;ptr2+=len;
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switch (len) {
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@ -183,7 +183,7 @@ static const char *parse_string(cJSON *item,const char *str)
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return ptr;
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}
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// Render the cstring provided to an escaped version that can be printed.
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/* Render the cstring provided to an escaped version that can be printed. */
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static char *print_string_ptr(const char *str)
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{
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const char *ptr;char *ptr2,*out;int len=0;
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@ -211,17 +211,17 @@ static char *print_string_ptr(const char *str)
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case '\n': *ptr2++='n'; break;
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case '\r': *ptr2++='r'; break;
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case '\t': *ptr2++='t'; break;
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default: ptr2--; break; // eviscerate with prejudice.
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default: ptr2--; break; /* eviscerate with prejudice. */
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}
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}
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}
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*ptr2++='\"';*ptr2++=0;
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return out;
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}
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// Invote print_string_ptr (which is useful) on an item.
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/* Invote print_string_ptr (which is useful) on an item. */
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static char *print_string(cJSON *item) {return print_string_ptr(item->valuestring);}
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// Predeclare these prototypes.
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/* Predeclare these prototypes. */
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static const char *parse_value(cJSON *item,const char *value);
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static char *print_value(cJSON *item,int depth,int fmt);
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static const char *parse_array(cJSON *item,const char *value);
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@ -229,10 +229,10 @@ static char *print_array(cJSON *item,int depth,int fmt);
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static const char *parse_object(cJSON *item,const char *value);
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static char *print_object(cJSON *item,int depth,int fmt);
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// Utility to jump whitespace and cr/lf
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/* Utility to jump whitespace and cr/lf */
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static const char *skip(const char *in) {while (in && (unsigned char)*in<=32) in++; return in;}
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// Parse an object - create a new root, and populate.
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/* Parse an object - create a new root, and populate. */
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cJSON *cJSON_Parse(const char *value)
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{
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cJSON *c=cJSON_New_Item();
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@ -242,14 +242,14 @@ cJSON *cJSON_Parse(const char *value)
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return c;
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}
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// Render a cJSON item/entity/structure to text.
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/* Render a cJSON item/entity/structure to text. */
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char *cJSON_Print(cJSON *item) {return print_value(item,0,1);}
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char *cJSON_PrintUnformatted(cJSON *item) {return print_value(item,0,0);}
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// Parser core - when encountering text, process appropriately.
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/* Parser core - when encountering text, process appropriately. */
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static const char *parse_value(cJSON *item,const char *value)
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{
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if (!value) return 0; // Fail on null.
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if (!value) return 0; /* Fail on null. */
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if (!strncmp(value,"null",4)) { item->type=cJSON_NULL; return value+4; }
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if (!strncmp(value,"false",5)) { item->type=cJSON_False; return value+5; }
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if (!strncmp(value,"true",4)) { item->type=cJSON_True; item->valueint=1; return value+4; }
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@ -258,10 +258,10 @@ static const char *parse_value(cJSON *item,const char *value)
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if (*value=='[') { return parse_array(item,value); }
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if (*value=='{') { return parse_object(item,value); }
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return 0; // failure.
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return 0; /* failure. */
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}
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// Render a value to text.
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/* Render a value to text. */
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static char *print_value(cJSON *item,int depth,int fmt)
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{
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char *out=0;
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@ -279,35 +279,35 @@ static char *print_value(cJSON *item,int depth,int fmt)
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return out;
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}
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// Build an array from input text.
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/* Build an array from input text. */
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static const char *parse_array(cJSON *item,const char *value)
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{
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cJSON *child;
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if (*value!='[') return 0; // not an array!
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if (*value!='[') return 0; /* not an array! */
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item->type=cJSON_Array;
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value=skip(value+1);
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if (*value==']') return value+1; // empty array.
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if (*value==']') return value+1; /* empty array. */
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item->child=child=cJSON_New_Item();
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if (!item->child) return 0; // memory fail
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value=skip(parse_value(child,skip(value))); // skip any spacing, get the value.
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if (!item->child) return 0; /* memory fail */
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value=skip(parse_value(child,skip(value))); /* skip any spacing, get the value. */
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if (!value) return 0;
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while (*value==',')
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{
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cJSON *new_item;
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if (!(new_item=cJSON_New_Item())) return 0; // memory fail
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if (!(new_item=cJSON_New_Item())) return 0; /* memory fail */
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child->next=new_item;new_item->prev=child;child=new_item;
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value=skip(parse_value(child,skip(value+1)));
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if (!value) return 0; // memory fail
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if (!value) return 0; /* memory fail */
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}
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if (*value==']') return value+1; // end of array
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return 0; // malformed.
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if (*value==']') return value+1; /* end of array */
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return 0; /* malformed. */
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}
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// Render an array to text
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/* Render an array to text */
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static char *print_array(cJSON *item,int depth,int fmt)
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{
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char **entries;
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@ -315,13 +315,13 @@ static char *print_array(cJSON *item,int depth,int fmt)
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cJSON *child=item->child;
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int numentries=0,i=0,fail=0;
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// How many entries in the array?
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/* How many entries in the array? */
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while (child) numentries++,child=child->next;
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// Allocate an array to hold the values for each
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/* Allocate an array to hold the values for each */
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entries=(char**)cJSON_malloc(numentries*sizeof(char*));
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if (!entries) return 0;
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memset(entries,0,numentries*sizeof(char*));
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// Retrieve all the results:
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/* Retrieve all the results: */
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child=item->child;
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while (child && !fail)
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{
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@ -331,12 +331,12 @@ static char *print_array(cJSON *item,int depth,int fmt)
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child=child->next;
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}
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// If we didn't fail, try to malloc the output string
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/* If we didn't fail, try to malloc the output string */
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if (!fail) out=cJSON_malloc(len);
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// If that fails, we fail.
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/* If that fails, we fail. */
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if (!out) fail=1;
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// Handle failure.
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/* Handle failure. */
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if (fail)
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{
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for (i=0;i<numentries;i++) if (entries[i]) cJSON_free(entries[i]);
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@ -344,7 +344,7 @@ static char *print_array(cJSON *item,int depth,int fmt)
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return 0;
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}
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// Compose the output array.
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/* Compose the output array. */
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*out='[';
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ptr=out+1;*ptr=0;
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for (i=0;i<numentries;i++)
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@ -358,52 +358,52 @@ static char *print_array(cJSON *item,int depth,int fmt)
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return out;
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}
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// Build an object from the text.
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/* Build an object from the text. */
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static const char *parse_object(cJSON *item,const char *value)
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{
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cJSON *child;
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if (*value!='{') return 0; // not an object!
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if (*value!='{') return 0; /* not an object! */
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item->type=cJSON_Object;
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value=skip(value+1);
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if (*value=='}') return value+1; // empty array.
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if (*value=='}') return value+1; /* empty array. */
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item->child=child=cJSON_New_Item();
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if (!item->child) return 0;
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value=skip(parse_string(child,skip(value)));
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if (!value) return 0;
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child->string=child->valuestring;child->valuestring=0;
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if (*value!=':') return 0; // fail!
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value=skip(parse_value(child,skip(value+1))); // skip any spacing, get the value.
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if (*value!=':') return 0; /* fail! */
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value=skip(parse_value(child,skip(value+1))); /* skip any spacing, get the value. */
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if (!value) return 0;
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while (*value==',')
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{
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cJSON *new_item;
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if (!(new_item=cJSON_New_Item())) return 0; // memory fail
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if (!(new_item=cJSON_New_Item())) return 0; /* memory fail */
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child->next=new_item;new_item->prev=child;child=new_item;
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value=skip(parse_string(child,skip(value+1)));
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if (!value) return 0;
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child->string=child->valuestring;child->valuestring=0;
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if (*value!=':') return 0; // fail!
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value=skip(parse_value(child,skip(value+1))); // skip any spacing, get the value.
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if (*value!=':') return 0; /* fail! */
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value=skip(parse_value(child,skip(value+1))); /* skip any spacing, get the value. */
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if (!value) return 0;
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}
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if (*value=='}') return value+1; // end of array
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return 0; // malformed.
|
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if (*value=='}') return value+1; /* end of array */
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return 0; /* malformed. */
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}
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// Render an object to text.
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/* Render an object to text. */
|
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static char *print_object(cJSON *item,int depth,int fmt)
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{
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char **entries=0,**names=0;
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char *out=0,*ptr,*ret,*str;int len=7,i=0,j;
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cJSON *child=item->child;
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int numentries=0,fail=0;
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// Count the number of entries.
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/* Count the number of entries. */
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while (child) numentries++,child=child->next;
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// Allocate space for the names and the objects
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/* Allocate space for the names and the objects */
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entries=(char**)cJSON_malloc(numentries*sizeof(char*));
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if (!entries) return 0;
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names=(char**)cJSON_malloc(numentries*sizeof(char*));
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@ -411,7 +411,7 @@ static char *print_object(cJSON *item,int depth,int fmt)
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memset(entries,0,sizeof(char*)*numentries);
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memset(names,0,sizeof(char*)*numentries);
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// Collect all the results into our arrays:
|
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/* Collect all the results into our arrays: */
|
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child=item->child;depth++;if (fmt) len+=depth;
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while (child)
|
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{
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@ -421,11 +421,11 @@ static char *print_object(cJSON *item,int depth,int fmt)
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child=child->next;
|
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}
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|
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// Try to allocate the output string
|
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/* Try to allocate the output string */
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if (!fail) out=(char*)cJSON_malloc(len);
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if (!out) fail=1;
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// Handle failure
|
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/* Handle failure */
|
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if (fail)
|
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{
|
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for (i=0;i<numentries;i++) {if (names[i]) free(names[i]);if (entries[i]) free(entries[i]);}
|
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@ -433,7 +433,7 @@ static char *print_object(cJSON *item,int depth,int fmt)
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return 0;
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}
|
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|
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// Compose the output:
|
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/* Compose the output: */
|
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*out='{';ptr=out+1;if (fmt)*ptr++='\n';*ptr=0;
|
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for (i=0;i<numentries;i++)
|
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{
|
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@ -452,17 +452,17 @@ static char *print_object(cJSON *item,int depth,int fmt)
|
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return out;
|
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}
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|
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// Get Array size/item / object item.
|
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/* Get Array size/item / object item. */
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int cJSON_GetArraySize(cJSON *array) {cJSON *c=array->child;int i=0;while(c)i++,c=c->next;return i;}
|
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cJSON *cJSON_GetArrayItem(cJSON *array,int item) {cJSON *c=array->child; while (c && item>0) item--,c=c->next; return c;}
|
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cJSON *cJSON_GetObjectItem(cJSON *object,const char *string) {cJSON *c=object->child; while (c && cJSON_strcasecmp(c->string,string)) c=c->next; return c;}
|
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|
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// Utility for array list handling.
|
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/* Utility for array list handling. */
|
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static void suffix_object(cJSON *prev,cJSON *item) {prev->next=item;item->prev=prev;}
|
||||
// Utility for handling references.
|
||||
/* Utility for handling references. */
|
||||
static cJSON *create_reference(cJSON *item) {cJSON *ref=cJSON_New_Item();if (!ref) return 0;memcpy(ref,item,sizeof(cJSON));ref->string=0;ref->type|=cJSON_IsReference;ref->next=ref->prev=0;return ref;}
|
||||
|
||||
// Add item to array/object.
|
||||
/* Add item to array/object. */
|
||||
void cJSON_AddItemToArray(cJSON *array, cJSON *item) {cJSON *c=array->child;if (!item) return; if (!c) {array->child=item;} else {while (c && c->next) c=c->next; suffix_object(c,item);}}
|
||||
void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item) {if (!item) return; if (item->string) cJSON_free(item->string);item->string=cJSON_strdup(string);cJSON_AddItemToArray(object,item);}
|
||||
void cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) {cJSON_AddItemToArray(array,create_reference(item));}
|
||||
@ -474,13 +474,13 @@ void cJSON_DeleteItemFromArray(cJSON *array,int which) {cJSON_Delete(cJSON_D
|
||||
cJSON *cJSON_DetachItemFromObject(cJSON *object,const char *string) {int i=0;cJSON *c=object->child;while (c && cJSON_strcasecmp(c->string,string)) i++,c=c->next;if (c) return cJSON_DetachItemFromArray(object,i);return 0;}
|
||||
void cJSON_DeleteItemFromObject(cJSON *object,const char *string) {cJSON_Delete(cJSON_DetachItemFromObject(object,string));}
|
||||
|
||||
// Replace array/object items with new ones.
|
||||
/* Replace array/object items with new ones. */
|
||||
void cJSON_ReplaceItemInArray(cJSON *array,int which,cJSON *newitem) {cJSON *c=array->child;while (c && which>0) c=c->next,which--;if (!c) return;
|
||||
newitem->next=c->next;newitem->prev=c->prev;if (newitem->next) newitem->next->prev=newitem;
|
||||
if (c==array->child) array->child=newitem; else newitem->prev->next=newitem;c->next=c->prev=0;cJSON_Delete(c);}
|
||||
void cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem){int i=0;cJSON *c=object->child;while(c && cJSON_strcasecmp(c->string,string))i++,c=c->next;if(c){newitem->string=cJSON_strdup(string);cJSON_ReplaceItemInArray(object,i,newitem);}}
|
||||
|
||||
// Create basic types:
|
||||
/* Create basic types: */
|
||||
cJSON *cJSON_CreateNull() {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_NULL;return item;}
|
||||
cJSON *cJSON_CreateTrue() {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_True;return item;}
|
||||
cJSON *cJSON_CreateFalse() {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_False;return item;}
|
||||
@ -490,7 +490,7 @@ cJSON *cJSON_CreateString(const char *string) {cJSON *item=cJSON_New_Item();if(i
|
||||
cJSON *cJSON_CreateArray() {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Array;return item;}
|
||||
cJSON *cJSON_CreateObject() {cJSON *item=cJSON_New_Item();if(item)item->type=cJSON_Object;return item;}
|
||||
|
||||
// Create Arrays:
|
||||
/* Create Arrays: */
|
||||
cJSON *cJSON_CreateIntArray(int *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
||||
cJSON *cJSON_CreateFloatArray(float *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
||||
cJSON *cJSON_CreateDoubleArray(double *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;a && i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
||||
|
||||
Reference in New Issue
Block a user