64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#ifndef FUTIL_READ_SIZE
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#define FUTIL_READ_SIZE 2097152 //Default here is 2MiB
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#endif
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//Reference: https://stackoverflow.com/a/44894946
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int ReadAllString(const char* path, char** content_ptr, size_t* bytes_read) {
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if (!path || !content_ptr || !bytes_read) return 0;
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FILE *file = fopen(path, "rb");
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if (!file) {
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fprintf(stderr, "Failed to open '%s'. %s.\n", path, strerror(errno));
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return 0;
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}
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char *content = NULL, *temp = NULL;
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size_t used = 0, capacity = 0, read = 0;
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while(1) {
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if (used + FUTIL_READ_SIZE + 1 > capacity) {
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capacity = used + FUTIL_READ_SIZE + 1;
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temp = realloc(content, capacity);
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if (!temp) {
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fprintf(stderr, "Failed to realloc space for file contents. %s.\n", strerror(errno));
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free(content);
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fclose(file);
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return 0;
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}
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content = temp;
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}
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read = fread(content + used, 1, FUTIL_READ_SIZE, file);
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if (read == 0) break;
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used += read;
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}
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fclose(file);
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//Shrink the buffer to fit just the contents of the buffer.
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temp = realloc(content, used + 1);
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if (!temp) {
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fprintf(stderr, "Failed to realloc to only hold the file contents. %s.\n", strerror(errno));
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free(content);
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return 0;
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}
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content = temp;
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content[used] = '\0';
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*content_ptr = content;
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*bytes_read = used;
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return 1;
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} |