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author | mwturvey <michael.w.turvey@intel.com> | 2017-03-08 10:47:27 -0700 |
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committer | mwturvey <michael.w.turvey@intel.com> | 2017-03-08 10:47:27 -0700 |
commit | a5430b24d41d1bb795db14036b35c39c7a9accd4 (patch) | |
tree | 90120d0a3d529aca81d77fe825229f8a6d641bc6 /redist/json_helpers.c | |
parent | 321749a4b8e3e8b3f4b03863200fbf86e36a0bbe (diff) | |
parent | c65498054c77192b2a12fdb5ef44439a14110292 (diff) | |
download | libsurvive-a5430b24d41d1bb795db14036b35c39c7a9accd4.tar.gz libsurvive-a5430b24d41d1bb795db14036b35c39c7a9accd4.tar.bz2 |
Merge branch 'master' of https://github.com/cnlohr/libsurvive
Diffstat (limited to 'redist/json_helpers.c')
-rw-r--r-- | redist/json_helpers.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/redist/json_helpers.c b/redist/json_helpers.c new file mode 100644 index 0000000..b7ccb40 --- /dev/null +++ b/redist/json_helpers.c @@ -0,0 +1,172 @@ +// (C) 2017 <>< Joshua Allen, Under MIT/x11 License. + +#define _GNU_SOURCE + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "json_helpers.h" +#include <jsmn.h> + + +void json_write_float_array(FILE* f, const char* tag, float* v, uint8_t count) { + uint8_t i = 0; + char * str1 = NULL; + char * str2 = NULL; + asprintf(&str1,"\"%s\":[", tag); + + for (i=0;i<count;++i) { + if ( (i+1) < count) { + asprintf(&str2, "%s\"%f\"", str1,v[i]); + } else { + asprintf(&str2, "%s\"%f\",", str1,v[i]); + } + free(str1); + str1=str2; + str2=NULL; + } + asprintf(&str2, "%s]", str1); + fputs(str2,f); + free(str1); + free(str2); +} + +void json_write_double_array(FILE* f, const char* tag, double* v, uint8_t count) { + uint8_t i = 0; + char * str1 = NULL; + char * str2 = NULL; + asprintf(&str1,"\"%s\":[", tag); + + for (i=0;i<count;++i) { + if (i<(count-1)) { + asprintf(&str2, "%s\"%f\",", str1,v[i]); + } else { + asprintf(&str2, "%s\"%f\"", str1,v[i]); + } + free(str1); + str1=str2; + str2=NULL; + } + asprintf(&str2, "%s]", str1); + fputs(str2,f); + free(str1); + free(str2); +} + +void json_write_uint32(FILE* f, const char* tag, uint32_t v) { + fprintf(f, "\"%s\":\"%d\"", tag, v); +} + +void json_write_float(FILE* f, const char* tag, float v) { + fprintf(f, "\"%s\":\"%f\"", tag, v); +} + +void json_write_str(FILE* f, const char* tag, const char* v) { + fprintf(f, "\"%s\":\"%s\"", tag, v); +} + + + + +void (*json_begin_object)(char* tag) = NULL; +void (*json_end_object)() = NULL; +void (*json_tag_value)(char* tag, char** values, uint16_t count) = NULL; + +uint32_t JSON_STRING_LEN; + +char* load_file_to_mem(const char* path) { + FILE * f = fopen( path, "r" ); + fseek( f, 0, SEEK_END ); + int len = ftell( f ); + fseek( f, 0, SEEK_SET ); + char * JSON_STRING = malloc( len ); + fread( JSON_STRING, len, 1, f ); + fclose( f ); + return JSON_STRING; +} + +static char* substr(const char* str, uint32_t start, uint32_t end, uint32_t npos) { + uint32_t l = end-start+1; + + if (end<=start || end>=npos) return NULL; + + char* x = malloc(l); + memcpy(x,str+start,l); + x[l-1] = '\0'; + return x; +} + +static uint16_t json_load_array(const char* JSON_STRING, jsmntok_t* tokens, uint16_t size, char* tag) { + jsmntok_t* t = tokens; + uint16_t i = 0; + + char* values[size]; + + for (i=0;i<size;++i) { + t = tokens+i; + values[i] = substr(JSON_STRING, t->start, t->end, JSON_STRING_LEN); + } + + if (json_tag_value != NULL) json_tag_value(tag, values, i); + + for (i=0;i<size;++i) free(values[i]); + + return size; +} + +void json_load_file(const char* path) { + uint32_t i = 0; + char* JSON_STRING = load_file_to_mem(path); + JSON_STRING_LEN = strlen(JSON_STRING); + + jsmn_parser parser; + jsmn_init(&parser); + + uint32_t items = jsmn_parse(&parser, JSON_STRING, JSON_STRING_LEN, NULL, 0); + jsmntok_t* tokens = malloc(items * sizeof(jsmntok_t)); + + jsmn_init(&parser); + items = jsmn_parse(&parser, JSON_STRING, JSON_STRING_LEN, tokens, items); + + int16_t children = -1; + + for (i=0; i<items; i+=2) + { + //increment i on each successful tag + values combination, not individual tokens + jsmntok_t* tag_t = tokens+i; + jsmntok_t* value_t = tokens+i+1; + + char* tag = substr(JSON_STRING, tag_t->start, tag_t->end, JSON_STRING_LEN); + char* value = substr(JSON_STRING, value_t->start, value_t->end, JSON_STRING_LEN); + + printf("%d %d c:%d %d %s \n", tag_t->start, tag_t->end, tag_t->size, tag_t->type, tag); + + + if (value_t->type == JSMN_ARRAY) { + i += json_load_array(JSON_STRING, tokens+i+2,value_t->size, tag); //look at array children + } else if (value_t->type == JSMN_OBJECT) { + printf("Begin Object\n"); + if (json_begin_object != NULL) json_begin_object(tag); + children = value_t->size +1; //+1 to account for this loop where we are not yed parsing children +// i += decode_jsmn_object(JSON_STRING, tokens+i+2,value_t->size); + } + else { + if (json_tag_value != NULL) json_tag_value(tag, &value, 1); + } + + if (children>=0) children--; + if (children == 0) { + children = -1; + printf("End Object\n"); + if (json_end_object!=NULL) json_end_object(); + } + +// printf("%d %s \n", value_t->type, tag); + + free(tag); + free(value); + } + + free(JSON_STRING); +} + |